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authorRuslan Kovalev <ruslan.a.kovalev@gmail.com>2022-02-10 16:46:45 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:46:45 +0300
commit9123176b341b6f2658cff5132482b8237c1416c8 (patch)
tree49e222ea1c5804306084bb3ae065bb702625360f /contrib/libs/zstd/lib/legacy/zstd_v04.c
parent59e19371de37995fcb36beb16cd6ec030af960bc (diff)
downloadydb-9123176b341b6f2658cff5132482b8237c1416c8.tar.gz
Restoring authorship annotation for Ruslan Kovalev <ruslan.a.kovalev@gmail.com>. Commit 2 of 2.
Diffstat (limited to 'contrib/libs/zstd/lib/legacy/zstd_v04.c')
-rw-r--r--contrib/libs/zstd/lib/legacy/zstd_v04.c6896
1 files changed, 3448 insertions, 3448 deletions
diff --git a/contrib/libs/zstd/lib/legacy/zstd_v04.c b/contrib/libs/zstd/lib/legacy/zstd_v04.c
index 8b6a2a471b..8d305c7eae 100644
--- a/contrib/libs/zstd/lib/legacy/zstd_v04.c
+++ b/contrib/libs/zstd/lib/legacy/zstd_v04.c
@@ -7,74 +7,74 @@
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
-
-
+
+
/******************************************
* Includes
******************************************/
#include <stddef.h> /* size_t, ptrdiff_t */
#include <string.h> /* memcpy */
-#include "zstd_v04.h"
+#include "zstd_v04.h"
#include "../common/error_private.h"
-
-
-/* ******************************************************************
+
+
+/* ******************************************************************
* mem.h
*******************************************************************/
-#ifndef MEM_H_MODULE
-#define MEM_H_MODULE
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-/******************************************
-* Compiler-specific
-******************************************/
+#ifndef MEM_H_MODULE
+#define MEM_H_MODULE
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+/******************************************
+* Compiler-specific
+******************************************/
#if defined(_MSC_VER) /* Visual Studio */
# include <stdlib.h> /* _byteswap_ulong */
# include <intrin.h> /* _byteswap_* */
#endif
-#if defined(__GNUC__)
-# define MEM_STATIC static __attribute__((unused))
-#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-# define MEM_STATIC static inline
-#elif defined(_MSC_VER)
-# define MEM_STATIC static __inline
-#else
-# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
-#endif
-
-
-/****************************************************************
-* Basic Types
-*****************************************************************/
-#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
+#if defined(__GNUC__)
+# define MEM_STATIC static __attribute__((unused))
+#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
+# define MEM_STATIC static inline
+#elif defined(_MSC_VER)
+# define MEM_STATIC static __inline
+#else
+# define MEM_STATIC static /* this version may generate warnings for unused static functions; disable the relevant warning */
+#endif
+
+
+/****************************************************************
+* Basic Types
+*****************************************************************/
+#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
# if defined(_AIX)
# include <inttypes.h>
# else
# include <stdint.h> /* intptr_t */
# endif
- typedef uint8_t BYTE;
- typedef uint16_t U16;
- typedef int16_t S16;
- typedef uint32_t U32;
- typedef int32_t S32;
- typedef uint64_t U64;
- typedef int64_t S64;
-#else
- typedef unsigned char BYTE;
- typedef unsigned short U16;
- typedef signed short S16;
- typedef unsigned int U32;
- typedef signed int S32;
- typedef unsigned long long U64;
- typedef signed long long S64;
-#endif
-
-
+ typedef uint8_t BYTE;
+ typedef uint16_t U16;
+ typedef int16_t S16;
+ typedef uint32_t U32;
+ typedef int32_t S32;
+ typedef uint64_t U64;
+ typedef int64_t S64;
+#else
+ typedef unsigned char BYTE;
+ typedef unsigned short U16;
+ typedef signed short S16;
+ typedef unsigned int U32;
+ typedef signed int S32;
+ typedef unsigned long long U64;
+ typedef signed long long S64;
+#endif
+
+
/*-*************************************
* Debug
***************************************/
@@ -84,598 +84,598 @@ extern "C" {
#endif
-/****************************************************************
-* Memory I/O
-*****************************************************************/
-/* MEM_FORCE_MEMORY_ACCESS
- * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
- * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
- * The below switch allow to select different access method for improved performance.
- * Method 0 (default) : use `memcpy()`. Safe and portable.
- * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable).
- * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
- * Method 2 : direct access. This method is portable but violate C standard.
- * It can generate buggy code on targets generating assembly depending on alignment.
- * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6)
- * See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details.
- * Prefer these methods in priority order (0 > 1 > 2)
- */
-#ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
+/****************************************************************
+* Memory I/O
+*****************************************************************/
+/* MEM_FORCE_MEMORY_ACCESS
+ * By default, access to unaligned memory is controlled by `memcpy()`, which is safe and portable.
+ * Unfortunately, on some target/compiler combinations, the generated assembly is sub-optimal.
+ * The below switch allow to select different access method for improved performance.
+ * Method 0 (default) : use `memcpy()`. Safe and portable.
+ * Method 1 : `__packed` statement. It depends on compiler extension (ie, not portable).
+ * This method is safe if your compiler supports it, and *generally* as fast or faster than `memcpy`.
+ * Method 2 : direct access. This method is portable but violate C standard.
+ * It can generate buggy code on targets generating assembly depending on alignment.
+ * But in some circumstances, it's the only known way to get the most performance (ie GCC + ARMv6)
+ * See http://fastcompression.blogspot.fr/2015/08/accessing-unaligned-memory.html for details.
+ * Prefer these methods in priority order (0 > 1 > 2)
+ */
+#ifndef MEM_FORCE_MEMORY_ACCESS /* can be defined externally, on command line for example */
# if defined(__INTEL_COMPILER) || defined(__GNUC__) || defined(__ICCARM__)
-# define MEM_FORCE_MEMORY_ACCESS 1
-# endif
-#endif
-
-MEM_STATIC unsigned MEM_32bits(void) { return sizeof(void*)==4; }
-MEM_STATIC unsigned MEM_64bits(void) { return sizeof(void*)==8; }
-
-MEM_STATIC unsigned MEM_isLittleEndian(void)
-{
- const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */
- return one.c[0];
-}
-
-#if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2)
-
-/* violates C standard on structure alignment.
-Only use if no other choice to achieve best performance on target platform */
-MEM_STATIC U16 MEM_read16(const void* memPtr) { return *(const U16*) memPtr; }
-MEM_STATIC U32 MEM_read32(const void* memPtr) { return *(const U32*) memPtr; }
-MEM_STATIC U64 MEM_read64(const void* memPtr) { return *(const U64*) memPtr; }
-
-MEM_STATIC void MEM_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
-
-#elif defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==1)
-
-/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
-/* currently only defined for gcc and icc */
-typedef union { U16 u16; U32 u32; U64 u64; } __attribute__((packed)) unalign;
-
-MEM_STATIC U16 MEM_read16(const void* ptr) { return ((const unalign*)ptr)->u16; }
-MEM_STATIC U32 MEM_read32(const void* ptr) { return ((const unalign*)ptr)->u32; }
-MEM_STATIC U64 MEM_read64(const void* ptr) { return ((const unalign*)ptr)->u64; }
-
-MEM_STATIC void MEM_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; }
-
-#else
-
-/* default method, safe and standard.
- can sometimes prove slower */
-
-MEM_STATIC U16 MEM_read16(const void* memPtr)
-{
- U16 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-MEM_STATIC U32 MEM_read32(const void* memPtr)
-{
- U32 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-MEM_STATIC U64 MEM_read64(const void* memPtr)
-{
- U64 val; memcpy(&val, memPtr, sizeof(val)); return val;
-}
-
-MEM_STATIC void MEM_write16(void* memPtr, U16 value)
-{
- memcpy(memPtr, &value, sizeof(value));
-}
-
+# define MEM_FORCE_MEMORY_ACCESS 1
+# endif
+#endif
+
+MEM_STATIC unsigned MEM_32bits(void) { return sizeof(void*)==4; }
+MEM_STATIC unsigned MEM_64bits(void) { return sizeof(void*)==8; }
+
+MEM_STATIC unsigned MEM_isLittleEndian(void)
+{
+ const union { U32 u; BYTE c[4]; } one = { 1 }; /* don't use static : performance detrimental */
+ return one.c[0];
+}
+
+#if defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==2)
+
+/* violates C standard on structure alignment.
+Only use if no other choice to achieve best performance on target platform */
+MEM_STATIC U16 MEM_read16(const void* memPtr) { return *(const U16*) memPtr; }
+MEM_STATIC U32 MEM_read32(const void* memPtr) { return *(const U32*) memPtr; }
+MEM_STATIC U64 MEM_read64(const void* memPtr) { return *(const U64*) memPtr; }
+
+MEM_STATIC void MEM_write16(void* memPtr, U16 value) { *(U16*)memPtr = value; }
+
+#elif defined(MEM_FORCE_MEMORY_ACCESS) && (MEM_FORCE_MEMORY_ACCESS==1)
+
+/* __pack instructions are safer, but compiler specific, hence potentially problematic for some compilers */
+/* currently only defined for gcc and icc */
+typedef union { U16 u16; U32 u32; U64 u64; } __attribute__((packed)) unalign;
+
+MEM_STATIC U16 MEM_read16(const void* ptr) { return ((const unalign*)ptr)->u16; }
+MEM_STATIC U32 MEM_read32(const void* ptr) { return ((const unalign*)ptr)->u32; }
+MEM_STATIC U64 MEM_read64(const void* ptr) { return ((const unalign*)ptr)->u64; }
+
+MEM_STATIC void MEM_write16(void* memPtr, U16 value) { ((unalign*)memPtr)->u16 = value; }
+
+#else
+
+/* default method, safe and standard.
+ can sometimes prove slower */
+
+MEM_STATIC U16 MEM_read16(const void* memPtr)
+{
+ U16 val; memcpy(&val, memPtr, sizeof(val)); return val;
+}
+
+MEM_STATIC U32 MEM_read32(const void* memPtr)
+{
+ U32 val; memcpy(&val, memPtr, sizeof(val)); return val;
+}
+
+MEM_STATIC U64 MEM_read64(const void* memPtr)
+{
+ U64 val; memcpy(&val, memPtr, sizeof(val)); return val;
+}
+
+MEM_STATIC void MEM_write16(void* memPtr, U16 value)
+{
+ memcpy(memPtr, &value, sizeof(value));
+}
+
#endif /* MEM_FORCE_MEMORY_ACCESS */
-
-
-MEM_STATIC U16 MEM_readLE16(const void* memPtr)
-{
- if (MEM_isLittleEndian())
- return MEM_read16(memPtr);
- else
- {
- const BYTE* p = (const BYTE*)memPtr;
- return (U16)(p[0] + (p[1]<<8));
- }
-}
-
-MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val)
-{
- if (MEM_isLittleEndian())
- {
- MEM_write16(memPtr, val);
- }
- else
- {
- BYTE* p = (BYTE*)memPtr;
- p[0] = (BYTE)val;
- p[1] = (BYTE)(val>>8);
- }
-}
-
+
+
+MEM_STATIC U16 MEM_readLE16(const void* memPtr)
+{
+ if (MEM_isLittleEndian())
+ return MEM_read16(memPtr);
+ else
+ {
+ const BYTE* p = (const BYTE*)memPtr;
+ return (U16)(p[0] + (p[1]<<8));
+ }
+}
+
+MEM_STATIC void MEM_writeLE16(void* memPtr, U16 val)
+{
+ if (MEM_isLittleEndian())
+ {
+ MEM_write16(memPtr, val);
+ }
+ else
+ {
+ BYTE* p = (BYTE*)memPtr;
+ p[0] = (BYTE)val;
+ p[1] = (BYTE)(val>>8);
+ }
+}
+
MEM_STATIC U32 MEM_readLE24(const void* memPtr)
{
return MEM_readLE16(memPtr) + (((const BYTE*)memPtr)[2] << 16);
}
-MEM_STATIC U32 MEM_readLE32(const void* memPtr)
-{
- if (MEM_isLittleEndian())
- return MEM_read32(memPtr);
- else
- {
- const BYTE* p = (const BYTE*)memPtr;
- return (U32)((U32)p[0] + ((U32)p[1]<<8) + ((U32)p[2]<<16) + ((U32)p[3]<<24));
- }
-}
-
-
-MEM_STATIC U64 MEM_readLE64(const void* memPtr)
-{
- if (MEM_isLittleEndian())
- return MEM_read64(memPtr);
- else
- {
- const BYTE* p = (const BYTE*)memPtr;
- return (U64)((U64)p[0] + ((U64)p[1]<<8) + ((U64)p[2]<<16) + ((U64)p[3]<<24)
- + ((U64)p[4]<<32) + ((U64)p[5]<<40) + ((U64)p[6]<<48) + ((U64)p[7]<<56));
- }
-}
-
-
-MEM_STATIC size_t MEM_readLEST(const void* memPtr)
-{
- if (MEM_32bits())
- return (size_t)MEM_readLE32(memPtr);
- else
- return (size_t)MEM_readLE64(memPtr);
-}
-
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* MEM_H_MODULE */
-
-/*
- zstd - standard compression library
- Header File for static linking only
-*/
-#ifndef ZSTD_STATIC_H
-#define ZSTD_STATIC_H
-
-
-/* *************************************
-* Types
-***************************************/
-#define ZSTD_WINDOWLOG_ABSOLUTEMIN 11
-
-/** from faster to stronger */
-typedef enum { ZSTD_fast, ZSTD_greedy, ZSTD_lazy, ZSTD_lazy2, ZSTD_btlazy2 } ZSTD_strategy;
-
-typedef struct
-{
- U64 srcSize; /* optional : tells how much bytes are present in the frame. Use 0 if not known. */
- U32 windowLog; /* largest match distance : larger == more compression, more memory needed during decompression */
- U32 contentLog; /* full search segment : larger == more compression, slower, more memory (useless for fast) */
- U32 hashLog; /* dispatch table : larger == more memory, faster */
- U32 searchLog; /* nb of searches : larger == more compression, slower */
- U32 searchLength; /* size of matches : larger == faster decompression, sometimes less compression */
- ZSTD_strategy strategy;
-} ZSTD_parameters;
-
-typedef ZSTDv04_Dctx ZSTD_DCtx;
-
-/* *************************************
-* Advanced functions
-***************************************/
-/** ZSTD_decompress_usingDict
-* Same as ZSTD_decompressDCtx, using a Dictionary content as prefix
-* Note : dict can be NULL, in which case, it's equivalent to ZSTD_decompressDCtx() */
-static size_t ZSTD_decompress_usingDict(ZSTD_DCtx* ctx,
- void* dst, size_t maxDstSize,
- const void* src, size_t srcSize,
- const void* dict,size_t dictSize);
-
-
-/* **************************************
-* Streaming functions (direct mode)
-****************************************/
-static size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx);
-static size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize);
-static void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
-
-static size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx);
-static size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
-
-/**
- Streaming decompression, bufferless mode
-
- A ZSTD_DCtx object is required to track streaming operations.
- Use ZSTD_createDCtx() / ZSTD_freeDCtx() to manage it.
- A ZSTD_DCtx object can be re-used multiple times. Use ZSTD_resetDCtx() to return to fresh status.
-
- First operation is to retrieve frame parameters, using ZSTD_getFrameParams().
- This function doesn't consume its input. It needs enough input data to properly decode the frame header.
- Objective is to retrieve *params.windowlog, to know minimum amount of memory required during decoding.
- Result : 0 when successful, it means the ZSTD_parameters structure has been filled.
- >0 : means there is not enough data into src. Provides the expected size to successfully decode header.
- errorCode, which can be tested using ZSTD_isError() (For example, if it's not a ZSTD header)
-
- Then, you can optionally insert a dictionary.
- This operation must mimic the compressor behavior, otherwise decompression will fail or be corrupted.
-
- Then it's possible to start decompression.
- Use ZSTD_nextSrcSizeToDecompress() and ZSTD_decompressContinue() alternatively.
- ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue().
- ZSTD_decompressContinue() requires this exact amount of bytes, or it will fail.
- ZSTD_decompressContinue() needs previous data blocks during decompression, up to (1 << windowlog).
- They should preferably be located contiguously, prior to current block. Alternatively, a round buffer is also possible.
-
- @result of ZSTD_decompressContinue() is the number of bytes regenerated within 'dst'.
- It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header.
-
- A frame is fully decoded when ZSTD_nextSrcSizeToDecompress() returns zero.
- Context can then be reset to start a new decompression.
-*/
-
-
-
-
-#endif /* ZSTD_STATIC_H */
-
-
-/*
- zstd_internal - common functions to include
- Header File for include
-*/
-#ifndef ZSTD_CCOMMON_H_MODULE
-#define ZSTD_CCOMMON_H_MODULE
-
-/* *************************************
-* Common macros
-***************************************/
-#define MIN(a,b) ((a)<(b) ? (a) : (b))
-#define MAX(a,b) ((a)>(b) ? (a) : (b))
-
-
-/* *************************************
-* Common constants
-***************************************/
-#define ZSTD_MAGICNUMBER 0xFD2FB524 /* v0.4 */
-
-#define KB *(1 <<10)
-#define MB *(1 <<20)
-#define GB *(1U<<30)
-
-#define BLOCKSIZE (128 KB) /* define, for static allocation */
-
-static const size_t ZSTD_blockHeaderSize = 3;
-static const size_t ZSTD_frameHeaderSize_min = 5;
-#define ZSTD_frameHeaderSize_max 5 /* define, for static allocation */
-
-#define BIT7 128
-#define BIT6 64
-#define BIT5 32
-#define BIT4 16
-#define BIT1 2
-#define BIT0 1
-
-#define IS_RAW BIT0
-#define IS_RLE BIT1
-
-#define MINMATCH 4
-#define REPCODE_STARTVALUE 4
-
-#define MLbits 7
-#define LLbits 6
-#define Offbits 5
-#define MaxML ((1<<MLbits) - 1)
-#define MaxLL ((1<<LLbits) - 1)
-#define MaxOff ((1<<Offbits)- 1)
-#define MLFSELog 10
-#define LLFSELog 10
-#define OffFSELog 9
-#define MaxSeq MAX(MaxLL, MaxML)
-
-#define MIN_SEQUENCES_SIZE (2 /*seqNb*/ + 2 /*dumps*/ + 3 /*seqTables*/ + 1 /*bitStream*/)
-#define MIN_CBLOCK_SIZE (3 /*litCSize*/ + MIN_SEQUENCES_SIZE)
-
+MEM_STATIC U32 MEM_readLE32(const void* memPtr)
+{
+ if (MEM_isLittleEndian())
+ return MEM_read32(memPtr);
+ else
+ {
+ const BYTE* p = (const BYTE*)memPtr;
+ return (U32)((U32)p[0] + ((U32)p[1]<<8) + ((U32)p[2]<<16) + ((U32)p[3]<<24));
+ }
+}
+
+
+MEM_STATIC U64 MEM_readLE64(const void* memPtr)
+{
+ if (MEM_isLittleEndian())
+ return MEM_read64(memPtr);
+ else
+ {
+ const BYTE* p = (const BYTE*)memPtr;
+ return (U64)((U64)p[0] + ((U64)p[1]<<8) + ((U64)p[2]<<16) + ((U64)p[3]<<24)
+ + ((U64)p[4]<<32) + ((U64)p[5]<<40) + ((U64)p[6]<<48) + ((U64)p[7]<<56));
+ }
+}
+
+
+MEM_STATIC size_t MEM_readLEST(const void* memPtr)
+{
+ if (MEM_32bits())
+ return (size_t)MEM_readLE32(memPtr);
+ else
+ return (size_t)MEM_readLE64(memPtr);
+}
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* MEM_H_MODULE */
+
+/*
+ zstd - standard compression library
+ Header File for static linking only
+*/
+#ifndef ZSTD_STATIC_H
+#define ZSTD_STATIC_H
+
+
+/* *************************************
+* Types
+***************************************/
+#define ZSTD_WINDOWLOG_ABSOLUTEMIN 11
+
+/** from faster to stronger */
+typedef enum { ZSTD_fast, ZSTD_greedy, ZSTD_lazy, ZSTD_lazy2, ZSTD_btlazy2 } ZSTD_strategy;
+
+typedef struct
+{
+ U64 srcSize; /* optional : tells how much bytes are present in the frame. Use 0 if not known. */
+ U32 windowLog; /* largest match distance : larger == more compression, more memory needed during decompression */
+ U32 contentLog; /* full search segment : larger == more compression, slower, more memory (useless for fast) */
+ U32 hashLog; /* dispatch table : larger == more memory, faster */
+ U32 searchLog; /* nb of searches : larger == more compression, slower */
+ U32 searchLength; /* size of matches : larger == faster decompression, sometimes less compression */
+ ZSTD_strategy strategy;
+} ZSTD_parameters;
+
+typedef ZSTDv04_Dctx ZSTD_DCtx;
+
+/* *************************************
+* Advanced functions
+***************************************/
+/** ZSTD_decompress_usingDict
+* Same as ZSTD_decompressDCtx, using a Dictionary content as prefix
+* Note : dict can be NULL, in which case, it's equivalent to ZSTD_decompressDCtx() */
+static size_t ZSTD_decompress_usingDict(ZSTD_DCtx* ctx,
+ void* dst, size_t maxDstSize,
+ const void* src, size_t srcSize,
+ const void* dict,size_t dictSize);
+
+
+/* **************************************
+* Streaming functions (direct mode)
+****************************************/
+static size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx);
+static size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize);
+static void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* src, size_t srcSize);
+
+static size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx);
+static size_t ZSTD_decompressContinue(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize);
+
+/**
+ Streaming decompression, bufferless mode
+
+ A ZSTD_DCtx object is required to track streaming operations.
+ Use ZSTD_createDCtx() / ZSTD_freeDCtx() to manage it.
+ A ZSTD_DCtx object can be re-used multiple times. Use ZSTD_resetDCtx() to return to fresh status.
+
+ First operation is to retrieve frame parameters, using ZSTD_getFrameParams().
+ This function doesn't consume its input. It needs enough input data to properly decode the frame header.
+ Objective is to retrieve *params.windowlog, to know minimum amount of memory required during decoding.
+ Result : 0 when successful, it means the ZSTD_parameters structure has been filled.
+ >0 : means there is not enough data into src. Provides the expected size to successfully decode header.
+ errorCode, which can be tested using ZSTD_isError() (For example, if it's not a ZSTD header)
+
+ Then, you can optionally insert a dictionary.
+ This operation must mimic the compressor behavior, otherwise decompression will fail or be corrupted.
+
+ Then it's possible to start decompression.
+ Use ZSTD_nextSrcSizeToDecompress() and ZSTD_decompressContinue() alternatively.
+ ZSTD_nextSrcSizeToDecompress() tells how much bytes to provide as 'srcSize' to ZSTD_decompressContinue().
+ ZSTD_decompressContinue() requires this exact amount of bytes, or it will fail.
+ ZSTD_decompressContinue() needs previous data blocks during decompression, up to (1 << windowlog).
+ They should preferably be located contiguously, prior to current block. Alternatively, a round buffer is also possible.
+
+ @result of ZSTD_decompressContinue() is the number of bytes regenerated within 'dst'.
+ It can be zero, which is not an error; it just means ZSTD_decompressContinue() has decoded some header.
+
+ A frame is fully decoded when ZSTD_nextSrcSizeToDecompress() returns zero.
+ Context can then be reset to start a new decompression.
+*/
+
+
+
+
+#endif /* ZSTD_STATIC_H */
+
+
+/*
+ zstd_internal - common functions to include
+ Header File for include
+*/
+#ifndef ZSTD_CCOMMON_H_MODULE
+#define ZSTD_CCOMMON_H_MODULE
+
+/* *************************************
+* Common macros
+***************************************/
+#define MIN(a,b) ((a)<(b) ? (a) : (b))
+#define MAX(a,b) ((a)>(b) ? (a) : (b))
+
+
+/* *************************************
+* Common constants
+***************************************/
+#define ZSTD_MAGICNUMBER 0xFD2FB524 /* v0.4 */
+
+#define KB *(1 <<10)
+#define MB *(1 <<20)
+#define GB *(1U<<30)
+
+#define BLOCKSIZE (128 KB) /* define, for static allocation */
+
+static const size_t ZSTD_blockHeaderSize = 3;
+static const size_t ZSTD_frameHeaderSize_min = 5;
+#define ZSTD_frameHeaderSize_max 5 /* define, for static allocation */
+
+#define BIT7 128
+#define BIT6 64
+#define BIT5 32
+#define BIT4 16
+#define BIT1 2
+#define BIT0 1
+
+#define IS_RAW BIT0
+#define IS_RLE BIT1
+
+#define MINMATCH 4
+#define REPCODE_STARTVALUE 4
+
+#define MLbits 7
+#define LLbits 6
+#define Offbits 5
+#define MaxML ((1<<MLbits) - 1)
+#define MaxLL ((1<<LLbits) - 1)
+#define MaxOff ((1<<Offbits)- 1)
+#define MLFSELog 10
+#define LLFSELog 10
+#define OffFSELog 9
+#define MaxSeq MAX(MaxLL, MaxML)
+
+#define MIN_SEQUENCES_SIZE (2 /*seqNb*/ + 2 /*dumps*/ + 3 /*seqTables*/ + 1 /*bitStream*/)
+#define MIN_CBLOCK_SIZE (3 /*litCSize*/ + MIN_SEQUENCES_SIZE)
+
#define ZSTD_CONTENTSIZE_ERROR (0ULL - 2)
-typedef enum { bt_compressed, bt_raw, bt_rle, bt_end } blockType_t;
-
-
-/* ******************************************
-* Shared functions to include for inlining
-********************************************/
-static void ZSTD_copy8(void* dst, const void* src) { memcpy(dst, src, 8); }
-
-#define COPY8(d,s) { ZSTD_copy8(d,s); d+=8; s+=8; }
-
-/*! ZSTD_wildcopy : custom version of memcpy(), can copy up to 7-8 bytes too many */
+typedef enum { bt_compressed, bt_raw, bt_rle, bt_end } blockType_t;
+
+
+/* ******************************************
+* Shared functions to include for inlining
+********************************************/
+static void ZSTD_copy8(void* dst, const void* src) { memcpy(dst, src, 8); }
+
+#define COPY8(d,s) { ZSTD_copy8(d,s); d+=8; s+=8; }
+
+/*! ZSTD_wildcopy : custom version of memcpy(), can copy up to 7-8 bytes too many */
static void ZSTD_wildcopy(void* dst, const void* src, ptrdiff_t length)
-{
- const BYTE* ip = (const BYTE*)src;
- BYTE* op = (BYTE*)dst;
- BYTE* const oend = op + length;
- do
- COPY8(op, ip)
- while (op < oend);
-}
-
-
-
-/* ******************************************************************
- FSE : Finite State Entropy coder
- header file
-****************************************************************** */
-#ifndef FSE_H
-#define FSE_H
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-/* *****************************************
-* Includes
-******************************************/
-#include <stddef.h> /* size_t, ptrdiff_t */
-
-
-/* *****************************************
-* FSE simple functions
-******************************************/
-static size_t FSE_decompress(void* dst, size_t maxDstSize,
- const void* cSrc, size_t cSrcSize);
-/*!
-FSE_decompress():
- Decompress FSE data from buffer 'cSrc', of size 'cSrcSize',
- into already allocated destination buffer 'dst', of size 'maxDstSize'.
- return : size of regenerated data (<= maxDstSize)
- or an error code, which can be tested using FSE_isError()
-
- ** Important ** : FSE_decompress() doesn't decompress non-compressible nor RLE data !!!
- Why ? : making this distinction requires a header.
- Header management is intentionally delegated to the user layer, which can better manage special cases.
-*/
-
-
-/* *****************************************
-* Tool functions
-******************************************/
-/* Error Management */
-static unsigned FSE_isError(size_t code); /* tells if a return value is an error code */
-
-
-
-/* *****************************************
-* FSE detailed API
-******************************************/
-/*!
-FSE_compress() does the following:
-1. count symbol occurrence from source[] into table count[]
-2. normalize counters so that sum(count[]) == Power_of_2 (2^tableLog)
-3. save normalized counters to memory buffer using writeNCount()
-4. build encoding table 'CTable' from normalized counters
-5. encode the data stream using encoding table 'CTable'
-
-FSE_decompress() does the following:
-1. read normalized counters with readNCount()
-2. build decoding table 'DTable' from normalized counters
-3. decode the data stream using decoding table 'DTable'
-
-The following API allows targeting specific sub-functions for advanced tasks.
-For example, it's possible to compress several blocks using the same 'CTable',
-or to save and provide normalized distribution using external method.
-*/
-
-
-/* *** DECOMPRESSION *** */
-
-/*!
-FSE_readNCount():
- Read compactly saved 'normalizedCounter' from 'rBuffer'.
- return : size read from 'rBuffer'
- or an errorCode, which can be tested using FSE_isError()
- maxSymbolValuePtr[0] and tableLogPtr[0] will also be updated with their respective values */
-static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSymbolValuePtr, unsigned* tableLogPtr, const void* rBuffer, size_t rBuffSize);
-
-/*!
-Constructor and Destructor of type FSE_DTable
- Note that its size depends on 'tableLog' */
-typedef unsigned FSE_DTable; /* don't allocate that. It's just a way to be more restrictive than void* */
-
-/*!
-FSE_buildDTable():
- Builds 'dt', which must be already allocated, using FSE_createDTable()
- return : 0,
- or an errorCode, which can be tested using FSE_isError() */
-static size_t FSE_buildDTable ( FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog);
-
-/*!
-FSE_decompress_usingDTable():
- Decompress compressed source 'cSrc' of size 'cSrcSize' using 'dt'
- into 'dst' which must be already allocated.
- return : size of regenerated data (necessarily <= maxDstSize)
- or an errorCode, which can be tested using FSE_isError() */
-static size_t FSE_decompress_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const FSE_DTable* dt);
-
-/*!
-Tutorial :
-----------
-(Note : these functions only decompress FSE-compressed blocks.
- If block is uncompressed, use memcpy() instead
- If block is a single repeated byte, use memset() instead )
-
-The first step is to obtain the normalized frequencies of symbols.
-This can be performed by FSE_readNCount() if it was saved using FSE_writeNCount().
-'normalizedCounter' must be already allocated, and have at least 'maxSymbolValuePtr[0]+1' cells of signed short.
-In practice, that means it's necessary to know 'maxSymbolValue' beforehand,
-or size the table to handle worst case situations (typically 256).
-FSE_readNCount() will provide 'tableLog' and 'maxSymbolValue'.
-The result of FSE_readNCount() is the number of bytes read from 'rBuffer'.
-Note that 'rBufferSize' must be at least 4 bytes, even if useful information is less than that.
-If there is an error, the function will return an error code, which can be tested using FSE_isError().
-
-The next step is to build the decompression tables 'FSE_DTable' from 'normalizedCounter'.
-This is performed by the function FSE_buildDTable().
-The space required by 'FSE_DTable' must be already allocated using FSE_createDTable().
-If there is an error, the function will return an error code, which can be tested using FSE_isError().
-
-'FSE_DTable' can then be used to decompress 'cSrc', with FSE_decompress_usingDTable().
-'cSrcSize' must be strictly correct, otherwise decompression will fail.
-FSE_decompress_usingDTable() result will tell how many bytes were regenerated (<=maxDstSize).
-If there is an error, the function will return an error code, which can be tested using FSE_isError(). (ex: dst buffer too small)
-*/
-
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* FSE_H */
-
-
-/* ******************************************************************
- bitstream
- Part of NewGen Entropy library
- header file (to include)
- Copyright (C) 2013-2015, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
- - Public forum : https://groups.google.com/forum/#!forum/lz4c
-****************************************************************** */
-#ifndef BITSTREAM_H_MODULE
-#define BITSTREAM_H_MODULE
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-/*
-* This API consists of small unitary functions, which highly benefit from being inlined.
-* Since link-time-optimization is not available for all compilers,
-* these functions are defined into a .h to be included.
-*/
-
-/**********************************************
-* bitStream decompression API (read backward)
-**********************************************/
-typedef struct
-{
- size_t bitContainer;
- unsigned bitsConsumed;
- const char* ptr;
- const char* start;
-} BIT_DStream_t;
-
-typedef enum { BIT_DStream_unfinished = 0,
- BIT_DStream_endOfBuffer = 1,
- BIT_DStream_completed = 2,
- BIT_DStream_overflow = 3 } BIT_DStream_status; /* result of BIT_reloadDStream() */
- /* 1,2,4,8 would be better for bitmap combinations, but slows down performance a bit ... :( */
-
-MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize);
-MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits);
-MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD);
-MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* bitD);
-
-
-
-
-/******************************************
-* unsafe API
-******************************************/
-MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, unsigned nbBits);
-/* faster, but works only if nbBits >= 1 */
-
-
-
-/****************************************************************
-* Helper functions
-****************************************************************/
+{
+ const BYTE* ip = (const BYTE*)src;
+ BYTE* op = (BYTE*)dst;
+ BYTE* const oend = op + length;
+ do
+ COPY8(op, ip)
+ while (op < oend);
+}
+
+
+
+/* ******************************************************************
+ FSE : Finite State Entropy coder
+ header file
+****************************************************************** */
+#ifndef FSE_H
+#define FSE_H
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+/* *****************************************
+* Includes
+******************************************/
+#include <stddef.h> /* size_t, ptrdiff_t */
+
+
+/* *****************************************
+* FSE simple functions
+******************************************/
+static size_t FSE_decompress(void* dst, size_t maxDstSize,
+ const void* cSrc, size_t cSrcSize);
+/*!
+FSE_decompress():
+ Decompress FSE data from buffer 'cSrc', of size 'cSrcSize',
+ into already allocated destination buffer 'dst', of size 'maxDstSize'.
+ return : size of regenerated data (<= maxDstSize)
+ or an error code, which can be tested using FSE_isError()
+
+ ** Important ** : FSE_decompress() doesn't decompress non-compressible nor RLE data !!!
+ Why ? : making this distinction requires a header.
+ Header management is intentionally delegated to the user layer, which can better manage special cases.
+*/
+
+
+/* *****************************************
+* Tool functions
+******************************************/
+/* Error Management */
+static unsigned FSE_isError(size_t code); /* tells if a return value is an error code */
+
+
+
+/* *****************************************
+* FSE detailed API
+******************************************/
+/*!
+FSE_compress() does the following:
+1. count symbol occurrence from source[] into table count[]
+2. normalize counters so that sum(count[]) == Power_of_2 (2^tableLog)
+3. save normalized counters to memory buffer using writeNCount()
+4. build encoding table 'CTable' from normalized counters
+5. encode the data stream using encoding table 'CTable'
+
+FSE_decompress() does the following:
+1. read normalized counters with readNCount()
+2. build decoding table 'DTable' from normalized counters
+3. decode the data stream using decoding table 'DTable'
+
+The following API allows targeting specific sub-functions for advanced tasks.
+For example, it's possible to compress several blocks using the same 'CTable',
+or to save and provide normalized distribution using external method.
+*/
+
+
+/* *** DECOMPRESSION *** */
+
+/*!
+FSE_readNCount():
+ Read compactly saved 'normalizedCounter' from 'rBuffer'.
+ return : size read from 'rBuffer'
+ or an errorCode, which can be tested using FSE_isError()
+ maxSymbolValuePtr[0] and tableLogPtr[0] will also be updated with their respective values */
+static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSymbolValuePtr, unsigned* tableLogPtr, const void* rBuffer, size_t rBuffSize);
+
+/*!
+Constructor and Destructor of type FSE_DTable
+ Note that its size depends on 'tableLog' */
+typedef unsigned FSE_DTable; /* don't allocate that. It's just a way to be more restrictive than void* */
+
+/*!
+FSE_buildDTable():
+ Builds 'dt', which must be already allocated, using FSE_createDTable()
+ return : 0,
+ or an errorCode, which can be tested using FSE_isError() */
+static size_t FSE_buildDTable ( FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog);
+
+/*!
+FSE_decompress_usingDTable():
+ Decompress compressed source 'cSrc' of size 'cSrcSize' using 'dt'
+ into 'dst' which must be already allocated.
+ return : size of regenerated data (necessarily <= maxDstSize)
+ or an errorCode, which can be tested using FSE_isError() */
+static size_t FSE_decompress_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const FSE_DTable* dt);
+
+/*!
+Tutorial :
+----------
+(Note : these functions only decompress FSE-compressed blocks.
+ If block is uncompressed, use memcpy() instead
+ If block is a single repeated byte, use memset() instead )
+
+The first step is to obtain the normalized frequencies of symbols.
+This can be performed by FSE_readNCount() if it was saved using FSE_writeNCount().
+'normalizedCounter' must be already allocated, and have at least 'maxSymbolValuePtr[0]+1' cells of signed short.
+In practice, that means it's necessary to know 'maxSymbolValue' beforehand,
+or size the table to handle worst case situations (typically 256).
+FSE_readNCount() will provide 'tableLog' and 'maxSymbolValue'.
+The result of FSE_readNCount() is the number of bytes read from 'rBuffer'.
+Note that 'rBufferSize' must be at least 4 bytes, even if useful information is less than that.
+If there is an error, the function will return an error code, which can be tested using FSE_isError().
+
+The next step is to build the decompression tables 'FSE_DTable' from 'normalizedCounter'.
+This is performed by the function FSE_buildDTable().
+The space required by 'FSE_DTable' must be already allocated using FSE_createDTable().
+If there is an error, the function will return an error code, which can be tested using FSE_isError().
+
+'FSE_DTable' can then be used to decompress 'cSrc', with FSE_decompress_usingDTable().
+'cSrcSize' must be strictly correct, otherwise decompression will fail.
+FSE_decompress_usingDTable() result will tell how many bytes were regenerated (<=maxDstSize).
+If there is an error, the function will return an error code, which can be tested using FSE_isError(). (ex: dst buffer too small)
+*/
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* FSE_H */
+
+
+/* ******************************************************************
+ bitstream
+ Part of NewGen Entropy library
+ header file (to include)
+ Copyright (C) 2013-2015, Yann Collet.
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
+ - Public forum : https://groups.google.com/forum/#!forum/lz4c
+****************************************************************** */
+#ifndef BITSTREAM_H_MODULE
+#define BITSTREAM_H_MODULE
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+/*
+* This API consists of small unitary functions, which highly benefit from being inlined.
+* Since link-time-optimization is not available for all compilers,
+* these functions are defined into a .h to be included.
+*/
+
+/**********************************************
+* bitStream decompression API (read backward)
+**********************************************/
+typedef struct
+{
+ size_t bitContainer;
+ unsigned bitsConsumed;
+ const char* ptr;
+ const char* start;
+} BIT_DStream_t;
+
+typedef enum { BIT_DStream_unfinished = 0,
+ BIT_DStream_endOfBuffer = 1,
+ BIT_DStream_completed = 2,
+ BIT_DStream_overflow = 3 } BIT_DStream_status; /* result of BIT_reloadDStream() */
+ /* 1,2,4,8 would be better for bitmap combinations, but slows down performance a bit ... :( */
+
+MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize);
+MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, unsigned nbBits);
+MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD);
+MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* bitD);
+
+
+
+
+/******************************************
+* unsafe API
+******************************************/
+MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, unsigned nbBits);
+/* faster, but works only if nbBits >= 1 */
+
+
+
+/****************************************************************
+* Helper functions
+****************************************************************/
MEM_STATIC unsigned BIT_highbit32 (U32 val)
-{
-# if defined(_MSC_VER) /* Visual */
+{
+# if defined(_MSC_VER) /* Visual */
unsigned long r;
return _BitScanReverse(&r, val) ? (unsigned)r : 0;
-# elif defined(__GNUC__) && (__GNUC__ >= 3) /* Use GCC Intrinsic */
+# elif defined(__GNUC__) && (__GNUC__ >= 3) /* Use GCC Intrinsic */
return __builtin_clz (val) ^ 31;
-# else /* Software version */
- static const unsigned DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 };
- U32 v = val;
- unsigned r;
- v |= v >> 1;
- v |= v >> 2;
- v |= v >> 4;
- v |= v >> 8;
- v |= v >> 16;
- r = DeBruijnClz[ (U32) (v * 0x07C4ACDDU) >> 27];
- return r;
-# endif
-}
-
-
-/**********************************************************
-* bitStream decoding
-**********************************************************/
-
-/*!BIT_initDStream
-* Initialize a BIT_DStream_t.
-* @bitD : a pointer to an already allocated BIT_DStream_t structure
-* @srcBuffer must point at the beginning of a bitStream
-* @srcSize must be the exact size of the bitStream
-* @result : size of stream (== srcSize) or an errorCode if a problem is detected
-*/
-MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize)
-{
- if (srcSize < 1) { memset(bitD, 0, sizeof(*bitD)); return ERROR(srcSize_wrong); }
-
- if (srcSize >= sizeof(size_t)) /* normal case */
- {
- U32 contain32;
- bitD->start = (const char*)srcBuffer;
- bitD->ptr = (const char*)srcBuffer + srcSize - sizeof(size_t);
- bitD->bitContainer = MEM_readLEST(bitD->ptr);
- contain32 = ((const BYTE*)srcBuffer)[srcSize-1];
- if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */
- bitD->bitsConsumed = 8 - BIT_highbit32(contain32);
- }
- else
- {
- U32 contain32;
- bitD->start = (const char*)srcBuffer;
- bitD->ptr = bitD->start;
- bitD->bitContainer = *(const BYTE*)(bitD->start);
- switch(srcSize)
- {
+# else /* Software version */
+ static const unsigned DeBruijnClz[32] = { 0, 9, 1, 10, 13, 21, 2, 29, 11, 14, 16, 18, 22, 25, 3, 30, 8, 12, 20, 28, 15, 17, 24, 7, 19, 27, 23, 6, 26, 5, 4, 31 };
+ U32 v = val;
+ unsigned r;
+ v |= v >> 1;
+ v |= v >> 2;
+ v |= v >> 4;
+ v |= v >> 8;
+ v |= v >> 16;
+ r = DeBruijnClz[ (U32) (v * 0x07C4ACDDU) >> 27];
+ return r;
+# endif
+}
+
+
+/**********************************************************
+* bitStream decoding
+**********************************************************/
+
+/*!BIT_initDStream
+* Initialize a BIT_DStream_t.
+* @bitD : a pointer to an already allocated BIT_DStream_t structure
+* @srcBuffer must point at the beginning of a bitStream
+* @srcSize must be the exact size of the bitStream
+* @result : size of stream (== srcSize) or an errorCode if a problem is detected
+*/
+MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, size_t srcSize)
+{
+ if (srcSize < 1) { memset(bitD, 0, sizeof(*bitD)); return ERROR(srcSize_wrong); }
+
+ if (srcSize >= sizeof(size_t)) /* normal case */
+ {
+ U32 contain32;
+ bitD->start = (const char*)srcBuffer;
+ bitD->ptr = (const char*)srcBuffer + srcSize - sizeof(size_t);
+ bitD->bitContainer = MEM_readLEST(bitD->ptr);
+ contain32 = ((const BYTE*)srcBuffer)[srcSize-1];
+ if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */
+ bitD->bitsConsumed = 8 - BIT_highbit32(contain32);
+ }
+ else
+ {
+ U32 contain32;
+ bitD->start = (const char*)srcBuffer;
+ bitD->ptr = bitD->start;
+ bitD->bitContainer = *(const BYTE*)(bitD->start);
+ switch(srcSize)
+ {
case 7: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[6]) << (sizeof(size_t)*8 - 16);/* fall-through */
case 6: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[5]) << (sizeof(size_t)*8 - 24);/* fall-through */
case 5: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[4]) << (sizeof(size_t)*8 - 32);/* fall-through */
@@ -683,2060 +683,2060 @@ MEM_STATIC size_t BIT_initDStream(BIT_DStream_t* bitD, const void* srcBuffer, si
case 3: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[2]) << 16; /* fall-through */
case 2: bitD->bitContainer += (size_t)(((const BYTE*)(bitD->start))[1]) << 8; /* fall-through */
default: break;
- }
- contain32 = ((const BYTE*)srcBuffer)[srcSize-1];
- if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */
- bitD->bitsConsumed = 8 - BIT_highbit32(contain32);
- bitD->bitsConsumed += (U32)(sizeof(size_t) - srcSize)*8;
- }
-
- return srcSize;
-}
-
-MEM_STATIC size_t BIT_lookBits(BIT_DStream_t* bitD, U32 nbBits)
-{
- const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1;
- return ((bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> 1) >> ((bitMask-nbBits) & bitMask);
-}
-
-/*! BIT_lookBitsFast :
-* unsafe version; only works only if nbBits >= 1 */
-MEM_STATIC size_t BIT_lookBitsFast(BIT_DStream_t* bitD, U32 nbBits)
-{
- const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1;
- return (bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> (((bitMask+1)-nbBits) & bitMask);
-}
-
-MEM_STATIC void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits)
-{
- bitD->bitsConsumed += nbBits;
-}
-
-MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, U32 nbBits)
-{
- size_t value = BIT_lookBits(bitD, nbBits);
- BIT_skipBits(bitD, nbBits);
- return value;
-}
-
-/*!BIT_readBitsFast :
-* unsafe version; only works only if nbBits >= 1 */
-MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, U32 nbBits)
-{
- size_t value = BIT_lookBitsFast(bitD, nbBits);
- BIT_skipBits(bitD, nbBits);
- return value;
-}
-
-MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD)
-{
+ }
+ contain32 = ((const BYTE*)srcBuffer)[srcSize-1];
+ if (contain32 == 0) return ERROR(GENERIC); /* endMark not present */
+ bitD->bitsConsumed = 8 - BIT_highbit32(contain32);
+ bitD->bitsConsumed += (U32)(sizeof(size_t) - srcSize)*8;
+ }
+
+ return srcSize;
+}
+
+MEM_STATIC size_t BIT_lookBits(BIT_DStream_t* bitD, U32 nbBits)
+{
+ const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1;
+ return ((bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> 1) >> ((bitMask-nbBits) & bitMask);
+}
+
+/*! BIT_lookBitsFast :
+* unsafe version; only works only if nbBits >= 1 */
+MEM_STATIC size_t BIT_lookBitsFast(BIT_DStream_t* bitD, U32 nbBits)
+{
+ const U32 bitMask = sizeof(bitD->bitContainer)*8 - 1;
+ return (bitD->bitContainer << (bitD->bitsConsumed & bitMask)) >> (((bitMask+1)-nbBits) & bitMask);
+}
+
+MEM_STATIC void BIT_skipBits(BIT_DStream_t* bitD, U32 nbBits)
+{
+ bitD->bitsConsumed += nbBits;
+}
+
+MEM_STATIC size_t BIT_readBits(BIT_DStream_t* bitD, U32 nbBits)
+{
+ size_t value = BIT_lookBits(bitD, nbBits);
+ BIT_skipBits(bitD, nbBits);
+ return value;
+}
+
+/*!BIT_readBitsFast :
+* unsafe version; only works only if nbBits >= 1 */
+MEM_STATIC size_t BIT_readBitsFast(BIT_DStream_t* bitD, U32 nbBits)
+{
+ size_t value = BIT_lookBitsFast(bitD, nbBits);
+ BIT_skipBits(bitD, nbBits);
+ return value;
+}
+
+MEM_STATIC BIT_DStream_status BIT_reloadDStream(BIT_DStream_t* bitD)
+{
if (bitD->bitsConsumed > (sizeof(bitD->bitContainer)*8)) /* should never happen */
return BIT_DStream_overflow;
-
- if (bitD->ptr >= bitD->start + sizeof(bitD->bitContainer))
- {
- bitD->ptr -= bitD->bitsConsumed >> 3;
- bitD->bitsConsumed &= 7;
- bitD->bitContainer = MEM_readLEST(bitD->ptr);
- return BIT_DStream_unfinished;
- }
- if (bitD->ptr == bitD->start)
- {
- if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return BIT_DStream_endOfBuffer;
- return BIT_DStream_completed;
- }
- {
- U32 nbBytes = bitD->bitsConsumed >> 3;
- BIT_DStream_status result = BIT_DStream_unfinished;
- if (bitD->ptr - nbBytes < bitD->start)
- {
- nbBytes = (U32)(bitD->ptr - bitD->start); /* ptr > start */
- result = BIT_DStream_endOfBuffer;
- }
- bitD->ptr -= nbBytes;
- bitD->bitsConsumed -= nbBytes*8;
- bitD->bitContainer = MEM_readLEST(bitD->ptr); /* reminder : srcSize > sizeof(bitD) */
- return result;
- }
-}
-
-/*! BIT_endOfDStream
-* @return Tells if DStream has reached its exact end
-*/
-MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* DStream)
-{
- return ((DStream->ptr == DStream->start) && (DStream->bitsConsumed == sizeof(DStream->bitContainer)*8));
-}
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* BITSTREAM_H_MODULE */
-
-
-
-/* ******************************************************************
- FSE : Finite State Entropy coder
- header file for static linking (only)
- Copyright (C) 2013-2015, Yann Collet
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
- - Public forum : https://groups.google.com/forum/#!forum/lz4c
-****************************************************************** */
-#ifndef FSE_STATIC_H
-#define FSE_STATIC_H
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-/* *****************************************
-* Static allocation
-*******************************************/
-/* FSE buffer bounds */
-#define FSE_NCOUNTBOUND 512
-#define FSE_BLOCKBOUND(size) (size + (size>>7))
-#define FSE_COMPRESSBOUND(size) (FSE_NCOUNTBOUND + FSE_BLOCKBOUND(size)) /* Macro version, useful for static allocation */
-
-/* It is possible to statically allocate FSE CTable/DTable as a table of unsigned using below macros */
-#define FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) (1 + (1<<(maxTableLog-1)) + ((maxSymbolValue+1)*2))
-#define FSE_DTABLE_SIZE_U32(maxTableLog) (1 + (1<<maxTableLog))
-
-
-/* *****************************************
-* FSE advanced API
-*******************************************/
-static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits);
-/* build a fake FSE_DTable, designed to read an uncompressed bitstream where each symbol uses nbBits */
-
-static size_t FSE_buildDTable_rle (FSE_DTable* dt, unsigned char symbolValue);
-/* build a fake FSE_DTable, designed to always generate the same symbolValue */
-
-
-
-/* *****************************************
-* FSE symbol decompression API
-*******************************************/
-typedef struct
-{
- size_t state;
- const void* table; /* precise table may vary, depending on U16 */
-} FSE_DState_t;
-
-
-static void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt);
-
-static unsigned char FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD);
-
-static unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr);
-
-
-/* *****************************************
-* FSE unsafe API
-*******************************************/
-static unsigned char FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD);
-/* faster, but works only if nbBits is always >= 1 (otherwise, result will be corrupted) */
-
-
-/* *****************************************
-* Implementation of inlined functions
-*******************************************/
-/* decompression */
-
-typedef struct {
- U16 tableLog;
- U16 fastMode;
-} FSE_DTableHeader; /* sizeof U32 */
-
-typedef struct
-{
- unsigned short newState;
- unsigned char symbol;
- unsigned char nbBits;
-} FSE_decode_t; /* size == U32 */
-
-MEM_STATIC void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt)
-{
- FSE_DTableHeader DTableH;
- memcpy(&DTableH, dt, sizeof(DTableH));
- DStatePtr->state = BIT_readBits(bitD, DTableH.tableLog);
- BIT_reloadDStream(bitD);
- DStatePtr->table = dt + 1;
-}
-
-MEM_STATIC BYTE FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD)
-{
- const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state];
- const U32 nbBits = DInfo.nbBits;
- BYTE symbol = DInfo.symbol;
- size_t lowBits = BIT_readBits(bitD, nbBits);
-
- DStatePtr->state = DInfo.newState + lowBits;
- return symbol;
-}
-
-MEM_STATIC BYTE FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD)
-{
- const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state];
- const U32 nbBits = DInfo.nbBits;
- BYTE symbol = DInfo.symbol;
- size_t lowBits = BIT_readBitsFast(bitD, nbBits);
-
- DStatePtr->state = DInfo.newState + lowBits;
- return symbol;
-}
-
-MEM_STATIC unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr)
-{
- return DStatePtr->state == 0;
-}
-
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* FSE_STATIC_H */
-
-/* ******************************************************************
- FSE : Finite State Entropy coder
- Copyright (C) 2013-2015, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy
- - Public forum : https://groups.google.com/forum/#!forum/lz4c
-****************************************************************** */
-
-#ifndef FSE_COMMONDEFS_ONLY
-
-/* **************************************************************
-* Tuning parameters
-****************************************************************/
-/*!MEMORY_USAGE :
-* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
-* Increasing memory usage improves compression ratio
-* Reduced memory usage can improve speed, due to cache effect
-* Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */
-#define FSE_MAX_MEMORY_USAGE 14
-#define FSE_DEFAULT_MEMORY_USAGE 13
-
-/*!FSE_MAX_SYMBOL_VALUE :
-* Maximum symbol value authorized.
-* Required for proper stack allocation */
-#define FSE_MAX_SYMBOL_VALUE 255
-
-
-/* **************************************************************
-* template functions type & suffix
-****************************************************************/
-#define FSE_FUNCTION_TYPE BYTE
-#define FSE_FUNCTION_EXTENSION
-#define FSE_DECODE_TYPE FSE_decode_t
-
-
-#endif /* !FSE_COMMONDEFS_ONLY */
-
-/* **************************************************************
-* Compiler specifics
-****************************************************************/
-#ifdef _MSC_VER /* Visual Studio */
-# define FORCE_INLINE static __forceinline
-# include <intrin.h> /* For Visual 2005 */
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */
-#else
+
+ if (bitD->ptr >= bitD->start + sizeof(bitD->bitContainer))
+ {
+ bitD->ptr -= bitD->bitsConsumed >> 3;
+ bitD->bitsConsumed &= 7;
+ bitD->bitContainer = MEM_readLEST(bitD->ptr);
+ return BIT_DStream_unfinished;
+ }
+ if (bitD->ptr == bitD->start)
+ {
+ if (bitD->bitsConsumed < sizeof(bitD->bitContainer)*8) return BIT_DStream_endOfBuffer;
+ return BIT_DStream_completed;
+ }
+ {
+ U32 nbBytes = bitD->bitsConsumed >> 3;
+ BIT_DStream_status result = BIT_DStream_unfinished;
+ if (bitD->ptr - nbBytes < bitD->start)
+ {
+ nbBytes = (U32)(bitD->ptr - bitD->start); /* ptr > start */
+ result = BIT_DStream_endOfBuffer;
+ }
+ bitD->ptr -= nbBytes;
+ bitD->bitsConsumed -= nbBytes*8;
+ bitD->bitContainer = MEM_readLEST(bitD->ptr); /* reminder : srcSize > sizeof(bitD) */
+ return result;
+ }
+}
+
+/*! BIT_endOfDStream
+* @return Tells if DStream has reached its exact end
+*/
+MEM_STATIC unsigned BIT_endOfDStream(const BIT_DStream_t* DStream)
+{
+ return ((DStream->ptr == DStream->start) && (DStream->bitsConsumed == sizeof(DStream->bitContainer)*8));
+}
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* BITSTREAM_H_MODULE */
+
+
+
+/* ******************************************************************
+ FSE : Finite State Entropy coder
+ header file for static linking (only)
+ Copyright (C) 2013-2015, Yann Collet
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
+ - Public forum : https://groups.google.com/forum/#!forum/lz4c
+****************************************************************** */
+#ifndef FSE_STATIC_H
+#define FSE_STATIC_H
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+/* *****************************************
+* Static allocation
+*******************************************/
+/* FSE buffer bounds */
+#define FSE_NCOUNTBOUND 512
+#define FSE_BLOCKBOUND(size) (size + (size>>7))
+#define FSE_COMPRESSBOUND(size) (FSE_NCOUNTBOUND + FSE_BLOCKBOUND(size)) /* Macro version, useful for static allocation */
+
+/* It is possible to statically allocate FSE CTable/DTable as a table of unsigned using below macros */
+#define FSE_CTABLE_SIZE_U32(maxTableLog, maxSymbolValue) (1 + (1<<(maxTableLog-1)) + ((maxSymbolValue+1)*2))
+#define FSE_DTABLE_SIZE_U32(maxTableLog) (1 + (1<<maxTableLog))
+
+
+/* *****************************************
+* FSE advanced API
+*******************************************/
+static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits);
+/* build a fake FSE_DTable, designed to read an uncompressed bitstream where each symbol uses nbBits */
+
+static size_t FSE_buildDTable_rle (FSE_DTable* dt, unsigned char symbolValue);
+/* build a fake FSE_DTable, designed to always generate the same symbolValue */
+
+
+
+/* *****************************************
+* FSE symbol decompression API
+*******************************************/
+typedef struct
+{
+ size_t state;
+ const void* table; /* precise table may vary, depending on U16 */
+} FSE_DState_t;
+
+
+static void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt);
+
+static unsigned char FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD);
+
+static unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr);
+
+
+/* *****************************************
+* FSE unsafe API
+*******************************************/
+static unsigned char FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD);
+/* faster, but works only if nbBits is always >= 1 (otherwise, result will be corrupted) */
+
+
+/* *****************************************
+* Implementation of inlined functions
+*******************************************/
+/* decompression */
+
+typedef struct {
+ U16 tableLog;
+ U16 fastMode;
+} FSE_DTableHeader; /* sizeof U32 */
+
+typedef struct
+{
+ unsigned short newState;
+ unsigned char symbol;
+ unsigned char nbBits;
+} FSE_decode_t; /* size == U32 */
+
+MEM_STATIC void FSE_initDState(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD, const FSE_DTable* dt)
+{
+ FSE_DTableHeader DTableH;
+ memcpy(&DTableH, dt, sizeof(DTableH));
+ DStatePtr->state = BIT_readBits(bitD, DTableH.tableLog);
+ BIT_reloadDStream(bitD);
+ DStatePtr->table = dt + 1;
+}
+
+MEM_STATIC BYTE FSE_decodeSymbol(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD)
+{
+ const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state];
+ const U32 nbBits = DInfo.nbBits;
+ BYTE symbol = DInfo.symbol;
+ size_t lowBits = BIT_readBits(bitD, nbBits);
+
+ DStatePtr->state = DInfo.newState + lowBits;
+ return symbol;
+}
+
+MEM_STATIC BYTE FSE_decodeSymbolFast(FSE_DState_t* DStatePtr, BIT_DStream_t* bitD)
+{
+ const FSE_decode_t DInfo = ((const FSE_decode_t*)(DStatePtr->table))[DStatePtr->state];
+ const U32 nbBits = DInfo.nbBits;
+ BYTE symbol = DInfo.symbol;
+ size_t lowBits = BIT_readBitsFast(bitD, nbBits);
+
+ DStatePtr->state = DInfo.newState + lowBits;
+ return symbol;
+}
+
+MEM_STATIC unsigned FSE_endOfDState(const FSE_DState_t* DStatePtr)
+{
+ return DStatePtr->state == 0;
+}
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* FSE_STATIC_H */
+
+/* ******************************************************************
+ FSE : Finite State Entropy coder
+ Copyright (C) 2013-2015, Yann Collet.
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - FSE source repository : https://github.com/Cyan4973/FiniteStateEntropy
+ - Public forum : https://groups.google.com/forum/#!forum/lz4c
+****************************************************************** */
+
+#ifndef FSE_COMMONDEFS_ONLY
+
+/* **************************************************************
+* Tuning parameters
+****************************************************************/
+/*!MEMORY_USAGE :
+* Memory usage formula : N->2^N Bytes (examples : 10 -> 1KB; 12 -> 4KB ; 16 -> 64KB; 20 -> 1MB; etc.)
+* Increasing memory usage improves compression ratio
+* Reduced memory usage can improve speed, due to cache effect
+* Recommended max value is 14, for 16KB, which nicely fits into Intel x86 L1 cache */
+#define FSE_MAX_MEMORY_USAGE 14
+#define FSE_DEFAULT_MEMORY_USAGE 13
+
+/*!FSE_MAX_SYMBOL_VALUE :
+* Maximum symbol value authorized.
+* Required for proper stack allocation */
+#define FSE_MAX_SYMBOL_VALUE 255
+
+
+/* **************************************************************
+* template functions type & suffix
+****************************************************************/
+#define FSE_FUNCTION_TYPE BYTE
+#define FSE_FUNCTION_EXTENSION
+#define FSE_DECODE_TYPE FSE_decode_t
+
+
+#endif /* !FSE_COMMONDEFS_ONLY */
+
+/* **************************************************************
+* Compiler specifics
+****************************************************************/
+#ifdef _MSC_VER /* Visual Studio */
+# define FORCE_INLINE static __forceinline
+# include <intrin.h> /* For Visual 2005 */
+# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
+# pragma warning(disable : 4214) /* disable: C4214: non-int bitfields */
+#else
# if defined (__cplusplus) || defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */
# ifdef __GNUC__
# define FORCE_INLINE static inline __attribute__((always_inline))
# else
# define FORCE_INLINE static inline
# endif
-# else
+# else
# define FORCE_INLINE static
# endif /* __STDC_VERSION__ */
-#endif
-
-
-/* **************************************************************
-* Dependencies
-****************************************************************/
-#include <stdlib.h> /* malloc, free, qsort */
-#include <string.h> /* memcpy, memset */
-#include <stdio.h> /* printf (debug) */
-
-
-/* ***************************************************************
-* Constants
-*****************************************************************/
-#define FSE_MAX_TABLELOG (FSE_MAX_MEMORY_USAGE-2)
-#define FSE_MAX_TABLESIZE (1U<<FSE_MAX_TABLELOG)
-#define FSE_MAXTABLESIZE_MASK (FSE_MAX_TABLESIZE-1)
-#define FSE_DEFAULT_TABLELOG (FSE_DEFAULT_MEMORY_USAGE-2)
-#define FSE_MIN_TABLELOG 5
-
-#define FSE_TABLELOG_ABSOLUTE_MAX 15
-#if FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX
-#error "FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX is not supported"
-#endif
-
-
-/* **************************************************************
-* Error Management
-****************************************************************/
-#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
-
-
-/* **************************************************************
-* Complex types
-****************************************************************/
-typedef U32 DTable_max_t[FSE_DTABLE_SIZE_U32(FSE_MAX_TABLELOG)];
-
-
-/*-**************************************************************
-* Templates
-****************************************************************/
-/*
- designed to be included
- for type-specific functions (template emulation in C)
- Objective is to write these functions only once, for improved maintenance
-*/
-
-/* safety checks */
-#ifndef FSE_FUNCTION_EXTENSION
-# error "FSE_FUNCTION_EXTENSION must be defined"
-#endif
-#ifndef FSE_FUNCTION_TYPE
-# error "FSE_FUNCTION_TYPE must be defined"
-#endif
-
-/* Function names */
-#define FSE_CAT(X,Y) X##Y
-#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y)
-#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y)
-
-static U32 FSE_tableStep(U32 tableSize) { return (tableSize>>1) + (tableSize>>3) + 3; }
-
-
-static size_t FSE_buildDTable(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog)
-{
- FSE_DTableHeader DTableH;
- void* const tdPtr = dt+1; /* because dt is unsigned, 32-bits aligned on 32-bits */
- FSE_DECODE_TYPE* const tableDecode = (FSE_DECODE_TYPE*) (tdPtr);
- const U32 tableSize = 1 << tableLog;
- const U32 tableMask = tableSize-1;
- const U32 step = FSE_tableStep(tableSize);
- U16 symbolNext[FSE_MAX_SYMBOL_VALUE+1];
- U32 position = 0;
- U32 highThreshold = tableSize-1;
- const S16 largeLimit= (S16)(1 << (tableLog-1));
- U32 noLarge = 1;
- U32 s;
-
- /* Sanity Checks */
- if (maxSymbolValue > FSE_MAX_SYMBOL_VALUE) return ERROR(maxSymbolValue_tooLarge);
- if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge);
-
- /* Init, lay down lowprob symbols */
+#endif
+
+
+/* **************************************************************
+* Dependencies
+****************************************************************/
+#include <stdlib.h> /* malloc, free, qsort */
+#include <string.h> /* memcpy, memset */
+#include <stdio.h> /* printf (debug) */
+
+
+/* ***************************************************************
+* Constants
+*****************************************************************/
+#define FSE_MAX_TABLELOG (FSE_MAX_MEMORY_USAGE-2)
+#define FSE_MAX_TABLESIZE (1U<<FSE_MAX_TABLELOG)
+#define FSE_MAXTABLESIZE_MASK (FSE_MAX_TABLESIZE-1)
+#define FSE_DEFAULT_TABLELOG (FSE_DEFAULT_MEMORY_USAGE-2)
+#define FSE_MIN_TABLELOG 5
+
+#define FSE_TABLELOG_ABSOLUTE_MAX 15
+#if FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX
+#error "FSE_MAX_TABLELOG > FSE_TABLELOG_ABSOLUTE_MAX is not supported"
+#endif
+
+
+/* **************************************************************
+* Error Management
+****************************************************************/
+#define FSE_STATIC_ASSERT(c) { enum { FSE_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
+
+
+/* **************************************************************
+* Complex types
+****************************************************************/
+typedef U32 DTable_max_t[FSE_DTABLE_SIZE_U32(FSE_MAX_TABLELOG)];
+
+
+/*-**************************************************************
+* Templates
+****************************************************************/
+/*
+ designed to be included
+ for type-specific functions (template emulation in C)
+ Objective is to write these functions only once, for improved maintenance
+*/
+
+/* safety checks */
+#ifndef FSE_FUNCTION_EXTENSION
+# error "FSE_FUNCTION_EXTENSION must be defined"
+#endif
+#ifndef FSE_FUNCTION_TYPE
+# error "FSE_FUNCTION_TYPE must be defined"
+#endif
+
+/* Function names */
+#define FSE_CAT(X,Y) X##Y
+#define FSE_FUNCTION_NAME(X,Y) FSE_CAT(X,Y)
+#define FSE_TYPE_NAME(X,Y) FSE_CAT(X,Y)
+
+static U32 FSE_tableStep(U32 tableSize) { return (tableSize>>1) + (tableSize>>3) + 3; }
+
+
+static size_t FSE_buildDTable(FSE_DTable* dt, const short* normalizedCounter, unsigned maxSymbolValue, unsigned tableLog)
+{
+ FSE_DTableHeader DTableH;
+ void* const tdPtr = dt+1; /* because dt is unsigned, 32-bits aligned on 32-bits */
+ FSE_DECODE_TYPE* const tableDecode = (FSE_DECODE_TYPE*) (tdPtr);
+ const U32 tableSize = 1 << tableLog;
+ const U32 tableMask = tableSize-1;
+ const U32 step = FSE_tableStep(tableSize);
+ U16 symbolNext[FSE_MAX_SYMBOL_VALUE+1];
+ U32 position = 0;
+ U32 highThreshold = tableSize-1;
+ const S16 largeLimit= (S16)(1 << (tableLog-1));
+ U32 noLarge = 1;
+ U32 s;
+
+ /* Sanity Checks */
+ if (maxSymbolValue > FSE_MAX_SYMBOL_VALUE) return ERROR(maxSymbolValue_tooLarge);
+ if (tableLog > FSE_MAX_TABLELOG) return ERROR(tableLog_tooLarge);
+
+ /* Init, lay down lowprob symbols */
memset(tableDecode, 0, sizeof(FSE_DECODE_TYPE) * (maxSymbolValue+1) ); /* useless init, but keep static analyzer happy, and we don't need to performance optimize legacy decoders */
- DTableH.tableLog = (U16)tableLog;
- for (s=0; s<=maxSymbolValue; s++)
- {
- if (normalizedCounter[s]==-1)
- {
- tableDecode[highThreshold--].symbol = (FSE_FUNCTION_TYPE)s;
- symbolNext[s] = 1;
- }
- else
- {
- if (normalizedCounter[s] >= largeLimit) noLarge=0;
- symbolNext[s] = normalizedCounter[s];
- }
- }
-
- /* Spread symbols */
- for (s=0; s<=maxSymbolValue; s++)
- {
- int i;
- for (i=0; i<normalizedCounter[s]; i++)
- {
- tableDecode[position].symbol = (FSE_FUNCTION_TYPE)s;
- position = (position + step) & tableMask;
- while (position > highThreshold) position = (position + step) & tableMask; /* lowprob area */
- }
- }
-
- if (position!=0) return ERROR(GENERIC); /* position must reach all cells once, otherwise normalizedCounter is incorrect */
-
- /* Build Decoding table */
- {
- U32 i;
- for (i=0; i<tableSize; i++)
- {
- FSE_FUNCTION_TYPE symbol = (FSE_FUNCTION_TYPE)(tableDecode[i].symbol);
- U16 nextState = symbolNext[symbol]++;
- tableDecode[i].nbBits = (BYTE) (tableLog - BIT_highbit32 ((U32)nextState) );
- tableDecode[i].newState = (U16) ( (nextState << tableDecode[i].nbBits) - tableSize);
- }
- }
-
- DTableH.fastMode = (U16)noLarge;
- memcpy(dt, &DTableH, sizeof(DTableH));
- return 0;
-}
-
-
-#ifndef FSE_COMMONDEFS_ONLY
-/******************************************
-* FSE helper functions
-******************************************/
-static unsigned FSE_isError(size_t code) { return ERR_isError(code); }
-
-
-/****************************************************************
-* FSE NCount encoding-decoding
-****************************************************************/
-static short FSE_abs(short a)
-{
- return a<0 ? -a : a;
-}
-
-static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSVPtr, unsigned* tableLogPtr,
- const void* headerBuffer, size_t hbSize)
-{
- const BYTE* const istart = (const BYTE*) headerBuffer;
- const BYTE* const iend = istart + hbSize;
- const BYTE* ip = istart;
- int nbBits;
- int remaining;
- int threshold;
- U32 bitStream;
- int bitCount;
- unsigned charnum = 0;
- int previous0 = 0;
-
- if (hbSize < 4) return ERROR(srcSize_wrong);
- bitStream = MEM_readLE32(ip);
- nbBits = (bitStream & 0xF) + FSE_MIN_TABLELOG; /* extract tableLog */
- if (nbBits > FSE_TABLELOG_ABSOLUTE_MAX) return ERROR(tableLog_tooLarge);
- bitStream >>= 4;
- bitCount = 4;
- *tableLogPtr = nbBits;
- remaining = (1<<nbBits)+1;
- threshold = 1<<nbBits;
- nbBits++;
-
- while ((remaining>1) && (charnum<=*maxSVPtr))
- {
- if (previous0)
- {
- unsigned n0 = charnum;
- while ((bitStream & 0xFFFF) == 0xFFFF)
- {
- n0+=24;
- if (ip < iend-5)
- {
- ip+=2;
- bitStream = MEM_readLE32(ip) >> bitCount;
- }
- else
- {
- bitStream >>= 16;
- bitCount+=16;
- }
- }
- while ((bitStream & 3) == 3)
- {
- n0+=3;
- bitStream>>=2;
- bitCount+=2;
- }
- n0 += bitStream & 3;
- bitCount += 2;
- if (n0 > *maxSVPtr) return ERROR(maxSymbolValue_tooSmall);
- while (charnum < n0) normalizedCounter[charnum++] = 0;
- if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4))
- {
- ip += bitCount>>3;
- bitCount &= 7;
- bitStream = MEM_readLE32(ip) >> bitCount;
- }
- else
- bitStream >>= 2;
- }
- {
- const short max = (short)((2*threshold-1)-remaining);
- short count;
-
- if ((bitStream & (threshold-1)) < (U32)max)
- {
- count = (short)(bitStream & (threshold-1));
- bitCount += nbBits-1;
- }
- else
- {
- count = (short)(bitStream & (2*threshold-1));
- if (count >= threshold) count -= max;
- bitCount += nbBits;
- }
-
- count--; /* extra accuracy */
- remaining -= FSE_abs(count);
- normalizedCounter[charnum++] = count;
- previous0 = !count;
- while (remaining < threshold)
- {
- nbBits--;
- threshold >>= 1;
- }
-
- {
- if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4))
- {
- ip += bitCount>>3;
- bitCount &= 7;
- }
- else
- {
- bitCount -= (int)(8 * (iend - 4 - ip));
+ DTableH.tableLog = (U16)tableLog;
+ for (s=0; s<=maxSymbolValue; s++)
+ {
+ if (normalizedCounter[s]==-1)
+ {
+ tableDecode[highThreshold--].symbol = (FSE_FUNCTION_TYPE)s;
+ symbolNext[s] = 1;
+ }
+ else
+ {
+ if (normalizedCounter[s] >= largeLimit) noLarge=0;
+ symbolNext[s] = normalizedCounter[s];
+ }
+ }
+
+ /* Spread symbols */
+ for (s=0; s<=maxSymbolValue; s++)
+ {
+ int i;
+ for (i=0; i<normalizedCounter[s]; i++)
+ {
+ tableDecode[position].symbol = (FSE_FUNCTION_TYPE)s;
+ position = (position + step) & tableMask;
+ while (position > highThreshold) position = (position + step) & tableMask; /* lowprob area */
+ }
+ }
+
+ if (position!=0) return ERROR(GENERIC); /* position must reach all cells once, otherwise normalizedCounter is incorrect */
+
+ /* Build Decoding table */
+ {
+ U32 i;
+ for (i=0; i<tableSize; i++)
+ {
+ FSE_FUNCTION_TYPE symbol = (FSE_FUNCTION_TYPE)(tableDecode[i].symbol);
+ U16 nextState = symbolNext[symbol]++;
+ tableDecode[i].nbBits = (BYTE) (tableLog - BIT_highbit32 ((U32)nextState) );
+ tableDecode[i].newState = (U16) ( (nextState << tableDecode[i].nbBits) - tableSize);
+ }
+ }
+
+ DTableH.fastMode = (U16)noLarge;
+ memcpy(dt, &DTableH, sizeof(DTableH));
+ return 0;
+}
+
+
+#ifndef FSE_COMMONDEFS_ONLY
+/******************************************
+* FSE helper functions
+******************************************/
+static unsigned FSE_isError(size_t code) { return ERR_isError(code); }
+
+
+/****************************************************************
+* FSE NCount encoding-decoding
+****************************************************************/
+static short FSE_abs(short a)
+{
+ return a<0 ? -a : a;
+}
+
+static size_t FSE_readNCount (short* normalizedCounter, unsigned* maxSVPtr, unsigned* tableLogPtr,
+ const void* headerBuffer, size_t hbSize)
+{
+ const BYTE* const istart = (const BYTE*) headerBuffer;
+ const BYTE* const iend = istart + hbSize;
+ const BYTE* ip = istart;
+ int nbBits;
+ int remaining;
+ int threshold;
+ U32 bitStream;
+ int bitCount;
+ unsigned charnum = 0;
+ int previous0 = 0;
+
+ if (hbSize < 4) return ERROR(srcSize_wrong);
+ bitStream = MEM_readLE32(ip);
+ nbBits = (bitStream & 0xF) + FSE_MIN_TABLELOG; /* extract tableLog */
+ if (nbBits > FSE_TABLELOG_ABSOLUTE_MAX) return ERROR(tableLog_tooLarge);
+ bitStream >>= 4;
+ bitCount = 4;
+ *tableLogPtr = nbBits;
+ remaining = (1<<nbBits)+1;
+ threshold = 1<<nbBits;
+ nbBits++;
+
+ while ((remaining>1) && (charnum<=*maxSVPtr))
+ {
+ if (previous0)
+ {
+ unsigned n0 = charnum;
+ while ((bitStream & 0xFFFF) == 0xFFFF)
+ {
+ n0+=24;
+ if (ip < iend-5)
+ {
+ ip+=2;
+ bitStream = MEM_readLE32(ip) >> bitCount;
+ }
+ else
+ {
+ bitStream >>= 16;
+ bitCount+=16;
+ }
+ }
+ while ((bitStream & 3) == 3)
+ {
+ n0+=3;
+ bitStream>>=2;
+ bitCount+=2;
+ }
+ n0 += bitStream & 3;
+ bitCount += 2;
+ if (n0 > *maxSVPtr) return ERROR(maxSymbolValue_tooSmall);
+ while (charnum < n0) normalizedCounter[charnum++] = 0;
+ if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4))
+ {
+ ip += bitCount>>3;
+ bitCount &= 7;
+ bitStream = MEM_readLE32(ip) >> bitCount;
+ }
+ else
+ bitStream >>= 2;
+ }
+ {
+ const short max = (short)((2*threshold-1)-remaining);
+ short count;
+
+ if ((bitStream & (threshold-1)) < (U32)max)
+ {
+ count = (short)(bitStream & (threshold-1));
+ bitCount += nbBits-1;
+ }
+ else
+ {
+ count = (short)(bitStream & (2*threshold-1));
+ if (count >= threshold) count -= max;
+ bitCount += nbBits;
+ }
+
+ count--; /* extra accuracy */
+ remaining -= FSE_abs(count);
+ normalizedCounter[charnum++] = count;
+ previous0 = !count;
+ while (remaining < threshold)
+ {
+ nbBits--;
+ threshold >>= 1;
+ }
+
+ {
+ if ((ip <= iend-7) || (ip + (bitCount>>3) <= iend-4))
+ {
+ ip += bitCount>>3;
+ bitCount &= 7;
+ }
+ else
+ {
+ bitCount -= (int)(8 * (iend - 4 - ip));
ip = iend - 4;
}
- bitStream = MEM_readLE32(ip) >> (bitCount & 31);
- }
- }
- }
- if (remaining != 1) return ERROR(GENERIC);
- *maxSVPtr = charnum-1;
-
- ip += (bitCount+7)>>3;
- if ((size_t)(ip-istart) > hbSize) return ERROR(srcSize_wrong);
- return ip-istart;
-}
-
-
-/*********************************************************
-* Decompression (Byte symbols)
-*********************************************************/
-static size_t FSE_buildDTable_rle (FSE_DTable* dt, BYTE symbolValue)
-{
- void* ptr = dt;
- FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr;
- void* dPtr = dt + 1;
- FSE_decode_t* const cell = (FSE_decode_t*)dPtr;
-
- DTableH->tableLog = 0;
- DTableH->fastMode = 0;
-
- cell->newState = 0;
- cell->symbol = symbolValue;
- cell->nbBits = 0;
-
- return 0;
-}
-
-
-static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits)
-{
- void* ptr = dt;
- FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr;
- void* dPtr = dt + 1;
- FSE_decode_t* const dinfo = (FSE_decode_t*)dPtr;
- const unsigned tableSize = 1 << nbBits;
- const unsigned tableMask = tableSize - 1;
- const unsigned maxSymbolValue = tableMask;
- unsigned s;
-
- /* Sanity checks */
- if (nbBits < 1) return ERROR(GENERIC); /* min size */
-
- /* Build Decoding Table */
- DTableH->tableLog = (U16)nbBits;
- DTableH->fastMode = 1;
- for (s=0; s<=maxSymbolValue; s++)
- {
- dinfo[s].newState = 0;
- dinfo[s].symbol = (BYTE)s;
- dinfo[s].nbBits = (BYTE)nbBits;
- }
-
- return 0;
-}
-
-FORCE_INLINE size_t FSE_decompress_usingDTable_generic(
- void* dst, size_t maxDstSize,
- const void* cSrc, size_t cSrcSize,
- const FSE_DTable* dt, const unsigned fast)
-{
- BYTE* const ostart = (BYTE*) dst;
- BYTE* op = ostart;
- BYTE* const omax = op + maxDstSize;
- BYTE* const olimit = omax-3;
-
- BIT_DStream_t bitD;
- FSE_DState_t state1;
- FSE_DState_t state2;
- size_t errorCode;
-
- /* Init */
- errorCode = BIT_initDStream(&bitD, cSrc, cSrcSize); /* replaced last arg by maxCompressed Size */
- if (FSE_isError(errorCode)) return errorCode;
-
- FSE_initDState(&state1, &bitD, dt);
- FSE_initDState(&state2, &bitD, dt);
-
-#define FSE_GETSYMBOL(statePtr) fast ? FSE_decodeSymbolFast(statePtr, &bitD) : FSE_decodeSymbol(statePtr, &bitD)
-
- /* 4 symbols per loop */
- for ( ; (BIT_reloadDStream(&bitD)==BIT_DStream_unfinished) && (op<olimit) ; op+=4)
- {
- op[0] = FSE_GETSYMBOL(&state1);
-
- if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
- BIT_reloadDStream(&bitD);
-
- op[1] = FSE_GETSYMBOL(&state2);
-
- if (FSE_MAX_TABLELOG*4+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
- { if (BIT_reloadDStream(&bitD) > BIT_DStream_unfinished) { op+=2; break; } }
-
- op[2] = FSE_GETSYMBOL(&state1);
-
- if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
- BIT_reloadDStream(&bitD);
-
- op[3] = FSE_GETSYMBOL(&state2);
- }
-
- /* tail */
- /* note : BIT_reloadDStream(&bitD) >= FSE_DStream_partiallyFilled; Ends at exactly BIT_DStream_completed */
- while (1)
- {
- if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state1))) )
- break;
-
- *op++ = FSE_GETSYMBOL(&state1);
-
- if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state2))) )
- break;
-
- *op++ = FSE_GETSYMBOL(&state2);
- }
-
- /* end ? */
- if (BIT_endOfDStream(&bitD) && FSE_endOfDState(&state1) && FSE_endOfDState(&state2))
- return op-ostart;
-
- if (op==omax) return ERROR(dstSize_tooSmall); /* dst buffer is full, but cSrc unfinished */
-
- return ERROR(corruption_detected);
-}
-
-
-static size_t FSE_decompress_usingDTable(void* dst, size_t originalSize,
- const void* cSrc, size_t cSrcSize,
- const FSE_DTable* dt)
-{
- FSE_DTableHeader DTableH;
- U32 fastMode;
-
- memcpy(&DTableH, dt, sizeof(DTableH));
- fastMode = DTableH.fastMode;
-
- /* select fast mode (static) */
- if (fastMode) return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 1);
- return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 0);
-}
-
-
-static size_t FSE_decompress(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize)
-{
- const BYTE* const istart = (const BYTE*)cSrc;
- const BYTE* ip = istart;
- short counting[FSE_MAX_SYMBOL_VALUE+1];
- DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */
- unsigned tableLog;
- unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE;
- size_t errorCode;
-
- if (cSrcSize<2) return ERROR(srcSize_wrong); /* too small input size */
-
- /* normal FSE decoding mode */
- errorCode = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize);
- if (FSE_isError(errorCode)) return errorCode;
- if (errorCode >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size */
- ip += errorCode;
- cSrcSize -= errorCode;
-
- errorCode = FSE_buildDTable (dt, counting, maxSymbolValue, tableLog);
- if (FSE_isError(errorCode)) return errorCode;
-
- /* always return, even if it is an error code */
- return FSE_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, dt);
-}
-
-
-
-#endif /* FSE_COMMONDEFS_ONLY */
-
-
-/* ******************************************************************
- Huff0 : Huffman coder, part of New Generation Entropy library
- header file
- Copyright (C) 2013-2015, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
- - Public forum : https://groups.google.com/forum/#!forum/lz4c
-****************************************************************** */
-#ifndef HUFF0_H
-#define HUFF0_H
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-/* ****************************************
-* Dependency
-******************************************/
-#include <stddef.h> /* size_t */
-
-
-/* ****************************************
-* Huff0 simple functions
-******************************************/
-static size_t HUF_decompress(void* dst, size_t dstSize,
- const void* cSrc, size_t cSrcSize);
-/*!
-HUF_decompress():
- Decompress Huff0 data from buffer 'cSrc', of size 'cSrcSize',
- into already allocated destination buffer 'dst', of size 'dstSize'.
- 'dstSize' must be the exact size of original (uncompressed) data.
- Note : in contrast with FSE, HUF_decompress can regenerate RLE (cSrcSize==1) and uncompressed (cSrcSize==dstSize) data, because it knows size to regenerate.
- @return : size of regenerated data (== dstSize)
- or an error code, which can be tested using HUF_isError()
-*/
-
-
-/* ****************************************
-* Tool functions
-******************************************/
-/* Error Management */
-static unsigned HUF_isError(size_t code); /* tells if a return value is an error code */
-
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* HUFF0_H */
-
-
-/* ******************************************************************
- Huff0 : Huffman coder, part of New Generation Entropy library
- header file for static linking (only)
- Copyright (C) 2013-2015, Yann Collet
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
- - Public forum : https://groups.google.com/forum/#!forum/lz4c
-****************************************************************** */
-#ifndef HUFF0_STATIC_H
-#define HUFF0_STATIC_H
-
-#if defined (__cplusplus)
-extern "C" {
-#endif
-
-
-
-/* ****************************************
-* Static allocation macros
-******************************************/
-/* static allocation of Huff0's DTable */
-#define HUF_DTABLE_SIZE(maxTableLog) (1 + (1<<maxTableLog)) /* nb Cells; use unsigned short for X2, unsigned int for X4 */
-#define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) \
- unsigned short DTable[HUF_DTABLE_SIZE(maxTableLog)] = { maxTableLog }
-#define HUF_CREATE_STATIC_DTABLEX4(DTable, maxTableLog) \
- unsigned int DTable[HUF_DTABLE_SIZE(maxTableLog)] = { maxTableLog }
-#define HUF_CREATE_STATIC_DTABLEX6(DTable, maxTableLog) \
- unsigned int DTable[HUF_DTABLE_SIZE(maxTableLog) * 3 / 2] = { maxTableLog }
-
-
-/* ****************************************
-* Advanced decompression functions
-******************************************/
-static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* single-symbol decoder */
-static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* double-symbols decoder */
-
-
-/* ****************************************
-* Huff0 detailed API
-******************************************/
-/*!
-HUF_decompress() does the following:
-1. select the decompression algorithm (X2, X4, X6) based on pre-computed heuristics
-2. build Huffman table from save, using HUF_readDTableXn()
-3. decode 1 or 4 segments in parallel using HUF_decompressSXn_usingDTable
-
-*/
-static size_t HUF_readDTableX2 (unsigned short* DTable, const void* src, size_t srcSize);
-static size_t HUF_readDTableX4 (unsigned* DTable, const void* src, size_t srcSize);
-
-static size_t HUF_decompress4X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const unsigned short* DTable);
-static size_t HUF_decompress4X4_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const unsigned* DTable);
-
-
-#if defined (__cplusplus)
-}
-#endif
-
-#endif /* HUFF0_STATIC_H */
-
-
-
-/* ******************************************************************
- Huff0 : Huffman coder, part of New Generation Entropy library
- Copyright (C) 2013-2015, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
-
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - FSE+Huff0 source repository : https://github.com/Cyan4973/FiniteStateEntropy
-****************************************************************** */
-
-/* **************************************************************
-* Compiler specifics
-****************************************************************/
-#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
-/* inline is defined */
-#elif defined(_MSC_VER)
-# define inline __inline
-#else
-# define inline /* disable inline */
-#endif
-
-
-#ifdef _MSC_VER /* Visual Studio */
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-#endif
-
-
-/* **************************************************************
-* Includes
-****************************************************************/
-#include <stdlib.h> /* malloc, free, qsort */
-#include <string.h> /* memcpy, memset */
-#include <stdio.h> /* printf (debug) */
-
-
-/* **************************************************************
-* Constants
-****************************************************************/
-#define HUF_ABSOLUTEMAX_TABLELOG 16 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
-#define HUF_MAX_TABLELOG 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */
-#define HUF_DEFAULT_TABLELOG HUF_MAX_TABLELOG /* tableLog by default, when not specified */
-#define HUF_MAX_SYMBOL_VALUE 255
-#if (HUF_MAX_TABLELOG > HUF_ABSOLUTEMAX_TABLELOG)
-# error "HUF_MAX_TABLELOG is too large !"
-#endif
-
-
-/* **************************************************************
-* Error Management
-****************************************************************/
-static unsigned HUF_isError(size_t code) { return ERR_isError(code); }
-#define HUF_STATIC_ASSERT(c) { enum { HUF_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
-
-
-
-/*-*******************************************************
-* Huff0 : Huffman block decompression
-*********************************************************/
-typedef struct { BYTE byte; BYTE nbBits; } HUF_DEltX2; /* single-symbol decoding */
-
-typedef struct { U16 sequence; BYTE nbBits; BYTE length; } HUF_DEltX4; /* double-symbols decoding */
-
-typedef struct { BYTE symbol; BYTE weight; } sortedSymbol_t;
-
-/*! HUF_readStats
- Read compact Huffman tree, saved by HUF_writeCTable
- @huffWeight : destination buffer
- @return : size read from `src`
-*/
-static size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, U32* rankStats,
- U32* nbSymbolsPtr, U32* tableLogPtr,
- const void* src, size_t srcSize)
-{
- U32 weightTotal;
- U32 tableLog;
- const BYTE* ip = (const BYTE*) src;
+ bitStream = MEM_readLE32(ip) >> (bitCount & 31);
+ }
+ }
+ }
+ if (remaining != 1) return ERROR(GENERIC);
+ *maxSVPtr = charnum-1;
+
+ ip += (bitCount+7)>>3;
+ if ((size_t)(ip-istart) > hbSize) return ERROR(srcSize_wrong);
+ return ip-istart;
+}
+
+
+/*********************************************************
+* Decompression (Byte symbols)
+*********************************************************/
+static size_t FSE_buildDTable_rle (FSE_DTable* dt, BYTE symbolValue)
+{
+ void* ptr = dt;
+ FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr;
+ void* dPtr = dt + 1;
+ FSE_decode_t* const cell = (FSE_decode_t*)dPtr;
+
+ DTableH->tableLog = 0;
+ DTableH->fastMode = 0;
+
+ cell->newState = 0;
+ cell->symbol = symbolValue;
+ cell->nbBits = 0;
+
+ return 0;
+}
+
+
+static size_t FSE_buildDTable_raw (FSE_DTable* dt, unsigned nbBits)
+{
+ void* ptr = dt;
+ FSE_DTableHeader* const DTableH = (FSE_DTableHeader*)ptr;
+ void* dPtr = dt + 1;
+ FSE_decode_t* const dinfo = (FSE_decode_t*)dPtr;
+ const unsigned tableSize = 1 << nbBits;
+ const unsigned tableMask = tableSize - 1;
+ const unsigned maxSymbolValue = tableMask;
+ unsigned s;
+
+ /* Sanity checks */
+ if (nbBits < 1) return ERROR(GENERIC); /* min size */
+
+ /* Build Decoding Table */
+ DTableH->tableLog = (U16)nbBits;
+ DTableH->fastMode = 1;
+ for (s=0; s<=maxSymbolValue; s++)
+ {
+ dinfo[s].newState = 0;
+ dinfo[s].symbol = (BYTE)s;
+ dinfo[s].nbBits = (BYTE)nbBits;
+ }
+
+ return 0;
+}
+
+FORCE_INLINE size_t FSE_decompress_usingDTable_generic(
+ void* dst, size_t maxDstSize,
+ const void* cSrc, size_t cSrcSize,
+ const FSE_DTable* dt, const unsigned fast)
+{
+ BYTE* const ostart = (BYTE*) dst;
+ BYTE* op = ostart;
+ BYTE* const omax = op + maxDstSize;
+ BYTE* const olimit = omax-3;
+
+ BIT_DStream_t bitD;
+ FSE_DState_t state1;
+ FSE_DState_t state2;
+ size_t errorCode;
+
+ /* Init */
+ errorCode = BIT_initDStream(&bitD, cSrc, cSrcSize); /* replaced last arg by maxCompressed Size */
+ if (FSE_isError(errorCode)) return errorCode;
+
+ FSE_initDState(&state1, &bitD, dt);
+ FSE_initDState(&state2, &bitD, dt);
+
+#define FSE_GETSYMBOL(statePtr) fast ? FSE_decodeSymbolFast(statePtr, &bitD) : FSE_decodeSymbol(statePtr, &bitD)
+
+ /* 4 symbols per loop */
+ for ( ; (BIT_reloadDStream(&bitD)==BIT_DStream_unfinished) && (op<olimit) ; op+=4)
+ {
+ op[0] = FSE_GETSYMBOL(&state1);
+
+ if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
+ BIT_reloadDStream(&bitD);
+
+ op[1] = FSE_GETSYMBOL(&state2);
+
+ if (FSE_MAX_TABLELOG*4+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
+ { if (BIT_reloadDStream(&bitD) > BIT_DStream_unfinished) { op+=2; break; } }
+
+ op[2] = FSE_GETSYMBOL(&state1);
+
+ if (FSE_MAX_TABLELOG*2+7 > sizeof(bitD.bitContainer)*8) /* This test must be static */
+ BIT_reloadDStream(&bitD);
+
+ op[3] = FSE_GETSYMBOL(&state2);
+ }
+
+ /* tail */
+ /* note : BIT_reloadDStream(&bitD) >= FSE_DStream_partiallyFilled; Ends at exactly BIT_DStream_completed */
+ while (1)
+ {
+ if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state1))) )
+ break;
+
+ *op++ = FSE_GETSYMBOL(&state1);
+
+ if ( (BIT_reloadDStream(&bitD)>BIT_DStream_completed) || (op==omax) || (BIT_endOfDStream(&bitD) && (fast || FSE_endOfDState(&state2))) )
+ break;
+
+ *op++ = FSE_GETSYMBOL(&state2);
+ }
+
+ /* end ? */
+ if (BIT_endOfDStream(&bitD) && FSE_endOfDState(&state1) && FSE_endOfDState(&state2))
+ return op-ostart;
+
+ if (op==omax) return ERROR(dstSize_tooSmall); /* dst buffer is full, but cSrc unfinished */
+
+ return ERROR(corruption_detected);
+}
+
+
+static size_t FSE_decompress_usingDTable(void* dst, size_t originalSize,
+ const void* cSrc, size_t cSrcSize,
+ const FSE_DTable* dt)
+{
+ FSE_DTableHeader DTableH;
+ U32 fastMode;
+
+ memcpy(&DTableH, dt, sizeof(DTableH));
+ fastMode = DTableH.fastMode;
+
+ /* select fast mode (static) */
+ if (fastMode) return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 1);
+ return FSE_decompress_usingDTable_generic(dst, originalSize, cSrc, cSrcSize, dt, 0);
+}
+
+
+static size_t FSE_decompress(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize)
+{
+ const BYTE* const istart = (const BYTE*)cSrc;
+ const BYTE* ip = istart;
+ short counting[FSE_MAX_SYMBOL_VALUE+1];
+ DTable_max_t dt; /* Static analyzer seems unable to understand this table will be properly initialized later */
+ unsigned tableLog;
+ unsigned maxSymbolValue = FSE_MAX_SYMBOL_VALUE;
+ size_t errorCode;
+
+ if (cSrcSize<2) return ERROR(srcSize_wrong); /* too small input size */
+
+ /* normal FSE decoding mode */
+ errorCode = FSE_readNCount (counting, &maxSymbolValue, &tableLog, istart, cSrcSize);
+ if (FSE_isError(errorCode)) return errorCode;
+ if (errorCode >= cSrcSize) return ERROR(srcSize_wrong); /* too small input size */
+ ip += errorCode;
+ cSrcSize -= errorCode;
+
+ errorCode = FSE_buildDTable (dt, counting, maxSymbolValue, tableLog);
+ if (FSE_isError(errorCode)) return errorCode;
+
+ /* always return, even if it is an error code */
+ return FSE_decompress_usingDTable (dst, maxDstSize, ip, cSrcSize, dt);
+}
+
+
+
+#endif /* FSE_COMMONDEFS_ONLY */
+
+
+/* ******************************************************************
+ Huff0 : Huffman coder, part of New Generation Entropy library
+ header file
+ Copyright (C) 2013-2015, Yann Collet.
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
+ - Public forum : https://groups.google.com/forum/#!forum/lz4c
+****************************************************************** */
+#ifndef HUFF0_H
+#define HUFF0_H
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+/* ****************************************
+* Dependency
+******************************************/
+#include <stddef.h> /* size_t */
+
+
+/* ****************************************
+* Huff0 simple functions
+******************************************/
+static size_t HUF_decompress(void* dst, size_t dstSize,
+ const void* cSrc, size_t cSrcSize);
+/*!
+HUF_decompress():
+ Decompress Huff0 data from buffer 'cSrc', of size 'cSrcSize',
+ into already allocated destination buffer 'dst', of size 'dstSize'.
+ 'dstSize' must be the exact size of original (uncompressed) data.
+ Note : in contrast with FSE, HUF_decompress can regenerate RLE (cSrcSize==1) and uncompressed (cSrcSize==dstSize) data, because it knows size to regenerate.
+ @return : size of regenerated data (== dstSize)
+ or an error code, which can be tested using HUF_isError()
+*/
+
+
+/* ****************************************
+* Tool functions
+******************************************/
+/* Error Management */
+static unsigned HUF_isError(size_t code); /* tells if a return value is an error code */
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* HUFF0_H */
+
+
+/* ******************************************************************
+ Huff0 : Huffman coder, part of New Generation Entropy library
+ header file for static linking (only)
+ Copyright (C) 2013-2015, Yann Collet
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - Source repository : https://github.com/Cyan4973/FiniteStateEntropy
+ - Public forum : https://groups.google.com/forum/#!forum/lz4c
+****************************************************************** */
+#ifndef HUFF0_STATIC_H
+#define HUFF0_STATIC_H
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+
+
+/* ****************************************
+* Static allocation macros
+******************************************/
+/* static allocation of Huff0's DTable */
+#define HUF_DTABLE_SIZE(maxTableLog) (1 + (1<<maxTableLog)) /* nb Cells; use unsigned short for X2, unsigned int for X4 */
+#define HUF_CREATE_STATIC_DTABLEX2(DTable, maxTableLog) \
+ unsigned short DTable[HUF_DTABLE_SIZE(maxTableLog)] = { maxTableLog }
+#define HUF_CREATE_STATIC_DTABLEX4(DTable, maxTableLog) \
+ unsigned int DTable[HUF_DTABLE_SIZE(maxTableLog)] = { maxTableLog }
+#define HUF_CREATE_STATIC_DTABLEX6(DTable, maxTableLog) \
+ unsigned int DTable[HUF_DTABLE_SIZE(maxTableLog) * 3 / 2] = { maxTableLog }
+
+
+/* ****************************************
+* Advanced decompression functions
+******************************************/
+static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* single-symbol decoder */
+static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize); /* double-symbols decoder */
+
+
+/* ****************************************
+* Huff0 detailed API
+******************************************/
+/*!
+HUF_decompress() does the following:
+1. select the decompression algorithm (X2, X4, X6) based on pre-computed heuristics
+2. build Huffman table from save, using HUF_readDTableXn()
+3. decode 1 or 4 segments in parallel using HUF_decompressSXn_usingDTable
+
+*/
+static size_t HUF_readDTableX2 (unsigned short* DTable, const void* src, size_t srcSize);
+static size_t HUF_readDTableX4 (unsigned* DTable, const void* src, size_t srcSize);
+
+static size_t HUF_decompress4X2_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const unsigned short* DTable);
+static size_t HUF_decompress4X4_usingDTable(void* dst, size_t maxDstSize, const void* cSrc, size_t cSrcSize, const unsigned* DTable);
+
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* HUFF0_STATIC_H */
+
+
+
+/* ******************************************************************
+ Huff0 : Huffman coder, part of New Generation Entropy library
+ Copyright (C) 2013-2015, Yann Collet.
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - FSE+Huff0 source repository : https://github.com/Cyan4973/FiniteStateEntropy
+****************************************************************** */
+
+/* **************************************************************
+* Compiler specifics
+****************************************************************/
+#if defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */)
+/* inline is defined */
+#elif defined(_MSC_VER)
+# define inline __inline
+#else
+# define inline /* disable inline */
+#endif
+
+
+#ifdef _MSC_VER /* Visual Studio */
+# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
+#endif
+
+
+/* **************************************************************
+* Includes
+****************************************************************/
+#include <stdlib.h> /* malloc, free, qsort */
+#include <string.h> /* memcpy, memset */
+#include <stdio.h> /* printf (debug) */
+
+
+/* **************************************************************
+* Constants
+****************************************************************/
+#define HUF_ABSOLUTEMAX_TABLELOG 16 /* absolute limit of HUF_MAX_TABLELOG. Beyond that value, code does not work */
+#define HUF_MAX_TABLELOG 12 /* max configured tableLog (for static allocation); can be modified up to HUF_ABSOLUTEMAX_TABLELOG */
+#define HUF_DEFAULT_TABLELOG HUF_MAX_TABLELOG /* tableLog by default, when not specified */
+#define HUF_MAX_SYMBOL_VALUE 255
+#if (HUF_MAX_TABLELOG > HUF_ABSOLUTEMAX_TABLELOG)
+# error "HUF_MAX_TABLELOG is too large !"
+#endif
+
+
+/* **************************************************************
+* Error Management
+****************************************************************/
+static unsigned HUF_isError(size_t code) { return ERR_isError(code); }
+#define HUF_STATIC_ASSERT(c) { enum { HUF_static_assert = 1/(int)(!!(c)) }; } /* use only *after* variable declarations */
+
+
+
+/*-*******************************************************
+* Huff0 : Huffman block decompression
+*********************************************************/
+typedef struct { BYTE byte; BYTE nbBits; } HUF_DEltX2; /* single-symbol decoding */
+
+typedef struct { U16 sequence; BYTE nbBits; BYTE length; } HUF_DEltX4; /* double-symbols decoding */
+
+typedef struct { BYTE symbol; BYTE weight; } sortedSymbol_t;
+
+/*! HUF_readStats
+ Read compact Huffman tree, saved by HUF_writeCTable
+ @huffWeight : destination buffer
+ @return : size read from `src`
+*/
+static size_t HUF_readStats(BYTE* huffWeight, size_t hwSize, U32* rankStats,
+ U32* nbSymbolsPtr, U32* tableLogPtr,
+ const void* src, size_t srcSize)
+{
+ U32 weightTotal;
+ U32 tableLog;
+ const BYTE* ip = (const BYTE*) src;
size_t iSize;
- size_t oSize;
- U32 n;
-
+ size_t oSize;
+ U32 n;
+
if (!srcSize) return ERROR(srcSize_wrong);
iSize = ip[0];
- //memset(huffWeight, 0, hwSize); /* is not necessary, even though some analyzer complain ... */
-
- if (iSize >= 128) /* special header */
- {
- if (iSize >= (242)) /* RLE */
- {
- static int l[14] = { 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 127, 128 };
- oSize = l[iSize-242];
- memset(huffWeight, 1, hwSize);
- iSize = 0;
- }
- else /* Incompressible */
- {
- oSize = iSize - 127;
- iSize = ((oSize+1)/2);
- if (iSize+1 > srcSize) return ERROR(srcSize_wrong);
- if (oSize >= hwSize) return ERROR(corruption_detected);
- ip += 1;
- for (n=0; n<oSize; n+=2)
- {
- huffWeight[n] = ip[n/2] >> 4;
- huffWeight[n+1] = ip[n/2] & 15;
- }
- }
- }
- else /* header compressed with FSE (normal case) */
- {
- if (iSize+1 > srcSize) return ERROR(srcSize_wrong);
- oSize = FSE_decompress(huffWeight, hwSize-1, ip+1, iSize); /* max (hwSize-1) values decoded, as last one is implied */
- if (FSE_isError(oSize)) return oSize;
- }
-
- /* collect weight stats */
- memset(rankStats, 0, (HUF_ABSOLUTEMAX_TABLELOG + 1) * sizeof(U32));
- weightTotal = 0;
- for (n=0; n<oSize; n++)
- {
- if (huffWeight[n] >= HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected);
- rankStats[huffWeight[n]]++;
- weightTotal += (1 << huffWeight[n]) >> 1;
- }
+ //memset(huffWeight, 0, hwSize); /* is not necessary, even though some analyzer complain ... */
+
+ if (iSize >= 128) /* special header */
+ {
+ if (iSize >= (242)) /* RLE */
+ {
+ static int l[14] = { 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64, 127, 128 };
+ oSize = l[iSize-242];
+ memset(huffWeight, 1, hwSize);
+ iSize = 0;
+ }
+ else /* Incompressible */
+ {
+ oSize = iSize - 127;
+ iSize = ((oSize+1)/2);
+ if (iSize+1 > srcSize) return ERROR(srcSize_wrong);
+ if (oSize >= hwSize) return ERROR(corruption_detected);
+ ip += 1;
+ for (n=0; n<oSize; n+=2)
+ {
+ huffWeight[n] = ip[n/2] >> 4;
+ huffWeight[n+1] = ip[n/2] & 15;
+ }
+ }
+ }
+ else /* header compressed with FSE (normal case) */
+ {
+ if (iSize+1 > srcSize) return ERROR(srcSize_wrong);
+ oSize = FSE_decompress(huffWeight, hwSize-1, ip+1, iSize); /* max (hwSize-1) values decoded, as last one is implied */
+ if (FSE_isError(oSize)) return oSize;
+ }
+
+ /* collect weight stats */
+ memset(rankStats, 0, (HUF_ABSOLUTEMAX_TABLELOG + 1) * sizeof(U32));
+ weightTotal = 0;
+ for (n=0; n<oSize; n++)
+ {
+ if (huffWeight[n] >= HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected);
+ rankStats[huffWeight[n]]++;
+ weightTotal += (1 << huffWeight[n]) >> 1;
+ }
if (weightTotal == 0) return ERROR(corruption_detected);
-
- /* get last non-null symbol weight (implied, total must be 2^n) */
- tableLog = BIT_highbit32(weightTotal) + 1;
- if (tableLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected);
- {
- U32 total = 1 << tableLog;
- U32 rest = total - weightTotal;
- U32 verif = 1 << BIT_highbit32(rest);
- U32 lastWeight = BIT_highbit32(rest) + 1;
- if (verif != rest) return ERROR(corruption_detected); /* last value must be a clean power of 2 */
- huffWeight[oSize] = (BYTE)lastWeight;
- rankStats[lastWeight]++;
- }
-
- /* check tree construction validity */
- if ((rankStats[1] < 2) || (rankStats[1] & 1)) return ERROR(corruption_detected); /* by construction : at least 2 elts of rank 1, must be even */
-
- /* results */
- *nbSymbolsPtr = (U32)(oSize+1);
- *tableLogPtr = tableLog;
- return iSize+1;
-}
-
-
-/**************************/
-/* single-symbol decoding */
-/**************************/
-
-static size_t HUF_readDTableX2 (U16* DTable, const void* src, size_t srcSize)
-{
- BYTE huffWeight[HUF_MAX_SYMBOL_VALUE + 1];
- U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; /* large enough for values from 0 to 16 */
- U32 tableLog = 0;
- size_t iSize;
- U32 nbSymbols = 0;
- U32 n;
- U32 nextRankStart;
- void* const dtPtr = DTable + 1;
- HUF_DEltX2* const dt = (HUF_DEltX2*)dtPtr;
-
- HUF_STATIC_ASSERT(sizeof(HUF_DEltX2) == sizeof(U16)); /* if compilation fails here, assertion is false */
- //memset(huffWeight, 0, sizeof(huffWeight)); /* is not necessary, even though some analyzer complain ... */
-
- iSize = HUF_readStats(huffWeight, HUF_MAX_SYMBOL_VALUE + 1, rankVal, &nbSymbols, &tableLog, src, srcSize);
- if (HUF_isError(iSize)) return iSize;
-
- /* check result */
- if (tableLog > DTable[0]) return ERROR(tableLog_tooLarge); /* DTable is too small */
- DTable[0] = (U16)tableLog; /* maybe should separate sizeof DTable, as allocated, from used size of DTable, in case of DTable re-use */
-
- /* Prepare ranks */
- nextRankStart = 0;
- for (n=1; n<=tableLog; n++)
- {
- U32 current = nextRankStart;
- nextRankStart += (rankVal[n] << (n-1));
- rankVal[n] = current;
- }
-
- /* fill DTable */
- for (n=0; n<nbSymbols; n++)
- {
- const U32 w = huffWeight[n];
- const U32 length = (1 << w) >> 1;
- U32 i;
- HUF_DEltX2 D;
- D.byte = (BYTE)n; D.nbBits = (BYTE)(tableLog + 1 - w);
- for (i = rankVal[w]; i < rankVal[w] + length; i++)
- dt[i] = D;
- rankVal[w] += length;
- }
-
- return iSize;
-}
-
-static BYTE HUF_decodeSymbolX2(BIT_DStream_t* Dstream, const HUF_DEltX2* dt, const U32 dtLog)
-{
- const size_t val = BIT_lookBitsFast(Dstream, dtLog); /* note : dtLog >= 1 */
- const BYTE c = dt[val].byte;
- BIT_skipBits(Dstream, dt[val].nbBits);
- return c;
-}
-
-#define HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) \
- *ptr++ = HUF_decodeSymbolX2(DStreamPtr, dt, dtLog)
-
-#define HUF_DECODE_SYMBOLX2_1(ptr, DStreamPtr) \
- if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \
- HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr)
-
-#define HUF_DECODE_SYMBOLX2_2(ptr, DStreamPtr) \
- if (MEM_64bits()) \
- HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr)
-
-static inline size_t HUF_decodeStreamX2(BYTE* p, BIT_DStream_t* const bitDPtr, BYTE* const pEnd, const HUF_DEltX2* const dt, const U32 dtLog)
-{
- BYTE* const pStart = p;
-
- /* up to 4 symbols at a time */
- while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-4))
- {
- HUF_DECODE_SYMBOLX2_2(p, bitDPtr);
- HUF_DECODE_SYMBOLX2_1(p, bitDPtr);
- HUF_DECODE_SYMBOLX2_2(p, bitDPtr);
- HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
- }
-
- /* closer to the end */
- while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd))
- HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
-
- /* no more data to retrieve from bitstream, hence no need to reload */
- while (p < pEnd)
- HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
-
- return pEnd-pStart;
-}
-
-
-static size_t HUF_decompress4X2_usingDTable(
- void* dst, size_t dstSize,
- const void* cSrc, size_t cSrcSize,
- const U16* DTable)
-{
- if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
-
- {
- const BYTE* const istart = (const BYTE*) cSrc;
- BYTE* const ostart = (BYTE*) dst;
- BYTE* const oend = ostart + dstSize;
- const void* const dtPtr = DTable;
- const HUF_DEltX2* const dt = ((const HUF_DEltX2*)dtPtr) +1;
- const U32 dtLog = DTable[0];
- size_t errorCode;
-
- /* Init */
- BIT_DStream_t bitD1;
- BIT_DStream_t bitD2;
- BIT_DStream_t bitD3;
- BIT_DStream_t bitD4;
- const size_t length1 = MEM_readLE16(istart);
- const size_t length2 = MEM_readLE16(istart+2);
- const size_t length3 = MEM_readLE16(istart+4);
- size_t length4;
- const BYTE* const istart1 = istart + 6; /* jumpTable */
- const BYTE* const istart2 = istart1 + length1;
- const BYTE* const istart3 = istart2 + length2;
- const BYTE* const istart4 = istart3 + length3;
- const size_t segmentSize = (dstSize+3) / 4;
- BYTE* const opStart2 = ostart + segmentSize;
- BYTE* const opStart3 = opStart2 + segmentSize;
- BYTE* const opStart4 = opStart3 + segmentSize;
- BYTE* op1 = ostart;
- BYTE* op2 = opStart2;
- BYTE* op3 = opStart3;
- BYTE* op4 = opStart4;
- U32 endSignal;
-
- length4 = cSrcSize - (length1 + length2 + length3 + 6);
- if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
- errorCode = BIT_initDStream(&bitD1, istart1, length1);
- if (HUF_isError(errorCode)) return errorCode;
- errorCode = BIT_initDStream(&bitD2, istart2, length2);
- if (HUF_isError(errorCode)) return errorCode;
- errorCode = BIT_initDStream(&bitD3, istart3, length3);
- if (HUF_isError(errorCode)) return errorCode;
- errorCode = BIT_initDStream(&bitD4, istart4, length4);
- if (HUF_isError(errorCode)) return errorCode;
-
- /* 16-32 symbols per loop (4-8 symbols per stream) */
- endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
- for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; )
- {
- HUF_DECODE_SYMBOLX2_2(op1, &bitD1);
- HUF_DECODE_SYMBOLX2_2(op2, &bitD2);
- HUF_DECODE_SYMBOLX2_2(op3, &bitD3);
- HUF_DECODE_SYMBOLX2_2(op4, &bitD4);
- HUF_DECODE_SYMBOLX2_1(op1, &bitD1);
- HUF_DECODE_SYMBOLX2_1(op2, &bitD2);
- HUF_DECODE_SYMBOLX2_1(op3, &bitD3);
- HUF_DECODE_SYMBOLX2_1(op4, &bitD4);
- HUF_DECODE_SYMBOLX2_2(op1, &bitD1);
- HUF_DECODE_SYMBOLX2_2(op2, &bitD2);
- HUF_DECODE_SYMBOLX2_2(op3, &bitD3);
- HUF_DECODE_SYMBOLX2_2(op4, &bitD4);
- HUF_DECODE_SYMBOLX2_0(op1, &bitD1);
- HUF_DECODE_SYMBOLX2_0(op2, &bitD2);
- HUF_DECODE_SYMBOLX2_0(op3, &bitD3);
- HUF_DECODE_SYMBOLX2_0(op4, &bitD4);
-
- endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
- }
-
- /* check corruption */
- if (op1 > opStart2) return ERROR(corruption_detected);
- if (op2 > opStart3) return ERROR(corruption_detected);
- if (op3 > opStart4) return ERROR(corruption_detected);
- /* note : op4 supposed already verified within main loop */
-
- /* finish bitStreams one by one */
- HUF_decodeStreamX2(op1, &bitD1, opStart2, dt, dtLog);
- HUF_decodeStreamX2(op2, &bitD2, opStart3, dt, dtLog);
- HUF_decodeStreamX2(op3, &bitD3, opStart4, dt, dtLog);
- HUF_decodeStreamX2(op4, &bitD4, oend, dt, dtLog);
-
- /* check */
- endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4);
- if (!endSignal) return ERROR(corruption_detected);
-
- /* decoded size */
- return dstSize;
- }
-}
-
-
-static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
-{
- HUF_CREATE_STATIC_DTABLEX2(DTable, HUF_MAX_TABLELOG);
- const BYTE* ip = (const BYTE*) cSrc;
- size_t errorCode;
-
- errorCode = HUF_readDTableX2 (DTable, cSrc, cSrcSize);
- if (HUF_isError(errorCode)) return errorCode;
- if (errorCode >= cSrcSize) return ERROR(srcSize_wrong);
- ip += errorCode;
- cSrcSize -= errorCode;
-
- return HUF_decompress4X2_usingDTable (dst, dstSize, ip, cSrcSize, DTable);
-}
-
-
-/***************************/
-/* double-symbols decoding */
-/***************************/
-
-static void HUF_fillDTableX4Level2(HUF_DEltX4* DTable, U32 sizeLog, const U32 consumed,
- const U32* rankValOrigin, const int minWeight,
- const sortedSymbol_t* sortedSymbols, const U32 sortedListSize,
- U32 nbBitsBaseline, U16 baseSeq)
-{
- HUF_DEltX4 DElt;
- U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1];
- U32 s;
-
- /* get pre-calculated rankVal */
- memcpy(rankVal, rankValOrigin, sizeof(rankVal));
-
- /* fill skipped values */
- if (minWeight>1)
- {
- U32 i, skipSize = rankVal[minWeight];
- MEM_writeLE16(&(DElt.sequence), baseSeq);
- DElt.nbBits = (BYTE)(consumed);
- DElt.length = 1;
- for (i = 0; i < skipSize; i++)
- DTable[i] = DElt;
- }
-
- /* fill DTable */
- for (s=0; s<sortedListSize; s++) /* note : sortedSymbols already skipped */
- {
- const U32 symbol = sortedSymbols[s].symbol;
- const U32 weight = sortedSymbols[s].weight;
- const U32 nbBits = nbBitsBaseline - weight;
- const U32 length = 1 << (sizeLog-nbBits);
- const U32 start = rankVal[weight];
- U32 i = start;
- const U32 end = start + length;
-
- MEM_writeLE16(&(DElt.sequence), (U16)(baseSeq + (symbol << 8)));
- DElt.nbBits = (BYTE)(nbBits + consumed);
- DElt.length = 2;
- do { DTable[i++] = DElt; } while (i<end); /* since length >= 1 */
-
- rankVal[weight] += length;
- }
-}
-
-typedef U32 rankVal_t[HUF_ABSOLUTEMAX_TABLELOG][HUF_ABSOLUTEMAX_TABLELOG + 1];
-
-static void HUF_fillDTableX4(HUF_DEltX4* DTable, const U32 targetLog,
- const sortedSymbol_t* sortedList, const U32 sortedListSize,
- const U32* rankStart, rankVal_t rankValOrigin, const U32 maxWeight,
- const U32 nbBitsBaseline)
-{
- U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1];
- const int scaleLog = nbBitsBaseline - targetLog; /* note : targetLog >= srcLog, hence scaleLog <= 1 */
- const U32 minBits = nbBitsBaseline - maxWeight;
- U32 s;
-
- memcpy(rankVal, rankValOrigin, sizeof(rankVal));
-
- /* fill DTable */
- for (s=0; s<sortedListSize; s++)
- {
- const U16 symbol = sortedList[s].symbol;
- const U32 weight = sortedList[s].weight;
- const U32 nbBits = nbBitsBaseline - weight;
- const U32 start = rankVal[weight];
- const U32 length = 1 << (targetLog-nbBits);
-
- if (targetLog-nbBits >= minBits) /* enough room for a second symbol */
- {
- U32 sortedRank;
- int minWeight = nbBits + scaleLog;
- if (minWeight < 1) minWeight = 1;
- sortedRank = rankStart[minWeight];
- HUF_fillDTableX4Level2(DTable+start, targetLog-nbBits, nbBits,
- rankValOrigin[nbBits], minWeight,
- sortedList+sortedRank, sortedListSize-sortedRank,
- nbBitsBaseline, symbol);
- }
- else
- {
- U32 i;
- const U32 end = start + length;
- HUF_DEltX4 DElt;
-
- MEM_writeLE16(&(DElt.sequence), symbol);
- DElt.nbBits = (BYTE)(nbBits);
- DElt.length = 1;
- for (i = start; i < end; i++)
- DTable[i] = DElt;
- }
- rankVal[weight] += length;
- }
-}
-
-static size_t HUF_readDTableX4 (U32* DTable, const void* src, size_t srcSize)
-{
- BYTE weightList[HUF_MAX_SYMBOL_VALUE + 1];
- sortedSymbol_t sortedSymbol[HUF_MAX_SYMBOL_VALUE + 1];
- U32 rankStats[HUF_ABSOLUTEMAX_TABLELOG + 1] = { 0 };
- U32 rankStart0[HUF_ABSOLUTEMAX_TABLELOG + 2] = { 0 };
- U32* const rankStart = rankStart0+1;
- rankVal_t rankVal;
- U32 tableLog, maxW, sizeOfSort, nbSymbols;
- const U32 memLog = DTable[0];
- size_t iSize;
- void* dtPtr = DTable;
- HUF_DEltX4* const dt = ((HUF_DEltX4*)dtPtr) + 1;
-
- HUF_STATIC_ASSERT(sizeof(HUF_DEltX4) == sizeof(U32)); /* if compilation fails here, assertion is false */
- if (memLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(tableLog_tooLarge);
- //memset(weightList, 0, sizeof(weightList)); /* is not necessary, even though some analyzer complain ... */
-
- iSize = HUF_readStats(weightList, HUF_MAX_SYMBOL_VALUE + 1, rankStats, &nbSymbols, &tableLog, src, srcSize);
- if (HUF_isError(iSize)) return iSize;
-
- /* check result */
- if (tableLog > memLog) return ERROR(tableLog_tooLarge); /* DTable can't fit code depth */
-
- /* find maxWeight */
- for (maxW = tableLog; rankStats[maxW]==0; maxW--)
- { if (!maxW) return ERROR(GENERIC); } /* necessarily finds a solution before maxW==0 */
-
- /* Get start index of each weight */
- {
- U32 w, nextRankStart = 0;
- for (w=1; w<=maxW; w++)
- {
- U32 current = nextRankStart;
- nextRankStart += rankStats[w];
- rankStart[w] = current;
- }
- rankStart[0] = nextRankStart; /* put all 0w symbols at the end of sorted list*/
- sizeOfSort = nextRankStart;
- }
-
- /* sort symbols by weight */
- {
- U32 s;
- for (s=0; s<nbSymbols; s++)
- {
- U32 w = weightList[s];
- U32 r = rankStart[w]++;
- sortedSymbol[r].symbol = (BYTE)s;
- sortedSymbol[r].weight = (BYTE)w;
- }
- rankStart[0] = 0; /* forget 0w symbols; this is beginning of weight(1) */
- }
-
- /* Build rankVal */
- {
- const U32 minBits = tableLog+1 - maxW;
- U32 nextRankVal = 0;
- U32 w, consumed;
- const int rescale = (memLog-tableLog) - 1; /* tableLog <= memLog */
- U32* rankVal0 = rankVal[0];
- for (w=1; w<=maxW; w++)
- {
- U32 current = nextRankVal;
- nextRankVal += rankStats[w] << (w+rescale);
- rankVal0[w] = current;
- }
- for (consumed = minBits; consumed <= memLog - minBits; consumed++)
- {
- U32* rankValPtr = rankVal[consumed];
- for (w = 1; w <= maxW; w++)
- {
- rankValPtr[w] = rankVal0[w] >> consumed;
- }
- }
- }
-
- HUF_fillDTableX4(dt, memLog,
- sortedSymbol, sizeOfSort,
- rankStart0, rankVal, maxW,
- tableLog+1);
-
- return iSize;
-}
-
-
-static U32 HUF_decodeSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog)
-{
- const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */
- memcpy(op, dt+val, 2);
- BIT_skipBits(DStream, dt[val].nbBits);
- return dt[val].length;
-}
-
-static U32 HUF_decodeLastSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog)
-{
- const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */
- memcpy(op, dt+val, 1);
- if (dt[val].length==1) BIT_skipBits(DStream, dt[val].nbBits);
- else
- {
- if (DStream->bitsConsumed < (sizeof(DStream->bitContainer)*8))
- {
- BIT_skipBits(DStream, dt[val].nbBits);
- if (DStream->bitsConsumed > (sizeof(DStream->bitContainer)*8))
- DStream->bitsConsumed = (sizeof(DStream->bitContainer)*8); /* ugly hack; works only because it's the last symbol. Note : can't easily extract nbBits from just this symbol */
- }
- }
- return 1;
-}
-
-
-#define HUF_DECODE_SYMBOLX4_0(ptr, DStreamPtr) \
- ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
-
-#define HUF_DECODE_SYMBOLX4_1(ptr, DStreamPtr) \
- if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \
- ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
-
-#define HUF_DECODE_SYMBOLX4_2(ptr, DStreamPtr) \
- if (MEM_64bits()) \
- ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
-
-static inline size_t HUF_decodeStreamX4(BYTE* p, BIT_DStream_t* bitDPtr, BYTE* const pEnd, const HUF_DEltX4* const dt, const U32 dtLog)
-{
- BYTE* const pStart = p;
-
- /* up to 8 symbols at a time */
- while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd-7))
- {
- HUF_DECODE_SYMBOLX4_2(p, bitDPtr);
- HUF_DECODE_SYMBOLX4_1(p, bitDPtr);
- HUF_DECODE_SYMBOLX4_2(p, bitDPtr);
- HUF_DECODE_SYMBOLX4_0(p, bitDPtr);
- }
-
- /* closer to the end */
- while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-2))
- HUF_DECODE_SYMBOLX4_0(p, bitDPtr);
-
- while (p <= pEnd-2)
- HUF_DECODE_SYMBOLX4_0(p, bitDPtr); /* no need to reload : reached the end of DStream */
-
- if (p < pEnd)
- p += HUF_decodeLastSymbolX4(p, bitDPtr, dt, dtLog);
-
- return p-pStart;
-}
-
-static size_t HUF_decompress4X4_usingDTable(
- void* dst, size_t dstSize,
- const void* cSrc, size_t cSrcSize,
- const U32* DTable)
-{
- if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
-
- {
- const BYTE* const istart = (const BYTE*) cSrc;
- BYTE* const ostart = (BYTE*) dst;
- BYTE* const oend = ostart + dstSize;
- const void* const dtPtr = DTable;
- const HUF_DEltX4* const dt = ((const HUF_DEltX4*)dtPtr) +1;
- const U32 dtLog = DTable[0];
- size_t errorCode;
-
- /* Init */
- BIT_DStream_t bitD1;
- BIT_DStream_t bitD2;
- BIT_DStream_t bitD3;
- BIT_DStream_t bitD4;
- const size_t length1 = MEM_readLE16(istart);
- const size_t length2 = MEM_readLE16(istart+2);
- const size_t length3 = MEM_readLE16(istart+4);
- size_t length4;
- const BYTE* const istart1 = istart + 6; /* jumpTable */
- const BYTE* const istart2 = istart1 + length1;
- const BYTE* const istart3 = istart2 + length2;
- const BYTE* const istart4 = istart3 + length3;
- const size_t segmentSize = (dstSize+3) / 4;
- BYTE* const opStart2 = ostart + segmentSize;
- BYTE* const opStart3 = opStart2 + segmentSize;
- BYTE* const opStart4 = opStart3 + segmentSize;
- BYTE* op1 = ostart;
- BYTE* op2 = opStart2;
- BYTE* op3 = opStart3;
- BYTE* op4 = opStart4;
- U32 endSignal;
-
- length4 = cSrcSize - (length1 + length2 + length3 + 6);
- if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
- errorCode = BIT_initDStream(&bitD1, istart1, length1);
- if (HUF_isError(errorCode)) return errorCode;
- errorCode = BIT_initDStream(&bitD2, istart2, length2);
- if (HUF_isError(errorCode)) return errorCode;
- errorCode = BIT_initDStream(&bitD3, istart3, length3);
- if (HUF_isError(errorCode)) return errorCode;
- errorCode = BIT_initDStream(&bitD4, istart4, length4);
- if (HUF_isError(errorCode)) return errorCode;
-
- /* 16-32 symbols per loop (4-8 symbols per stream) */
- endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
- for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; )
- {
- HUF_DECODE_SYMBOLX4_2(op1, &bitD1);
- HUF_DECODE_SYMBOLX4_2(op2, &bitD2);
- HUF_DECODE_SYMBOLX4_2(op3, &bitD3);
- HUF_DECODE_SYMBOLX4_2(op4, &bitD4);
- HUF_DECODE_SYMBOLX4_1(op1, &bitD1);
- HUF_DECODE_SYMBOLX4_1(op2, &bitD2);
- HUF_DECODE_SYMBOLX4_1(op3, &bitD3);
- HUF_DECODE_SYMBOLX4_1(op4, &bitD4);
- HUF_DECODE_SYMBOLX4_2(op1, &bitD1);
- HUF_DECODE_SYMBOLX4_2(op2, &bitD2);
- HUF_DECODE_SYMBOLX4_2(op3, &bitD3);
- HUF_DECODE_SYMBOLX4_2(op4, &bitD4);
- HUF_DECODE_SYMBOLX4_0(op1, &bitD1);
- HUF_DECODE_SYMBOLX4_0(op2, &bitD2);
- HUF_DECODE_SYMBOLX4_0(op3, &bitD3);
- HUF_DECODE_SYMBOLX4_0(op4, &bitD4);
-
- endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
- }
-
- /* check corruption */
- if (op1 > opStart2) return ERROR(corruption_detected);
- if (op2 > opStart3) return ERROR(corruption_detected);
- if (op3 > opStart4) return ERROR(corruption_detected);
- /* note : op4 supposed already verified within main loop */
-
- /* finish bitStreams one by one */
- HUF_decodeStreamX4(op1, &bitD1, opStart2, dt, dtLog);
- HUF_decodeStreamX4(op2, &bitD2, opStart3, dt, dtLog);
- HUF_decodeStreamX4(op3, &bitD3, opStart4, dt, dtLog);
- HUF_decodeStreamX4(op4, &bitD4, oend, dt, dtLog);
-
- /* check */
- endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4);
- if (!endSignal) return ERROR(corruption_detected);
-
- /* decoded size */
- return dstSize;
- }
-}
-
-
-static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
-{
- HUF_CREATE_STATIC_DTABLEX4(DTable, HUF_MAX_TABLELOG);
- const BYTE* ip = (const BYTE*) cSrc;
-
- size_t hSize = HUF_readDTableX4 (DTable, cSrc, cSrcSize);
- if (HUF_isError(hSize)) return hSize;
- if (hSize >= cSrcSize) return ERROR(srcSize_wrong);
- ip += hSize;
- cSrcSize -= hSize;
-
- return HUF_decompress4X4_usingDTable (dst, dstSize, ip, cSrcSize, DTable);
-}
-
-
-/**********************************/
-/* Generic decompression selector */
-/**********************************/
-
-typedef struct { U32 tableTime; U32 decode256Time; } algo_time_t;
-static const algo_time_t algoTime[16 /* Quantization */][3 /* single, double, quad */] =
-{
- /* single, double, quad */
- {{0,0}, {1,1}, {2,2}}, /* Q==0 : impossible */
- {{0,0}, {1,1}, {2,2}}, /* Q==1 : impossible */
- {{ 38,130}, {1313, 74}, {2151, 38}}, /* Q == 2 : 12-18% */
- {{ 448,128}, {1353, 74}, {2238, 41}}, /* Q == 3 : 18-25% */
- {{ 556,128}, {1353, 74}, {2238, 47}}, /* Q == 4 : 25-32% */
- {{ 714,128}, {1418, 74}, {2436, 53}}, /* Q == 5 : 32-38% */
- {{ 883,128}, {1437, 74}, {2464, 61}}, /* Q == 6 : 38-44% */
- {{ 897,128}, {1515, 75}, {2622, 68}}, /* Q == 7 : 44-50% */
- {{ 926,128}, {1613, 75}, {2730, 75}}, /* Q == 8 : 50-56% */
- {{ 947,128}, {1729, 77}, {3359, 77}}, /* Q == 9 : 56-62% */
- {{1107,128}, {2083, 81}, {4006, 84}}, /* Q ==10 : 62-69% */
- {{1177,128}, {2379, 87}, {4785, 88}}, /* Q ==11 : 69-75% */
- {{1242,128}, {2415, 93}, {5155, 84}}, /* Q ==12 : 75-81% */
- {{1349,128}, {2644,106}, {5260,106}}, /* Q ==13 : 81-87% */
- {{1455,128}, {2422,124}, {4174,124}}, /* Q ==14 : 87-93% */
- {{ 722,128}, {1891,145}, {1936,146}}, /* Q ==15 : 93-99% */
-};
-
-typedef size_t (*decompressionAlgo)(void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);
-
-static size_t HUF_decompress (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
-{
- static const decompressionAlgo decompress[3] = { HUF_decompress4X2, HUF_decompress4X4, NULL };
- /* estimate decompression time */
- U32 Q;
- const U32 D256 = (U32)(dstSize >> 8);
- U32 Dtime[3];
- U32 algoNb = 0;
- int n;
-
- /* validation checks */
- if (dstSize == 0) return ERROR(dstSize_tooSmall);
- if (cSrcSize > dstSize) return ERROR(corruption_detected); /* invalid */
- if (cSrcSize == dstSize) { memcpy(dst, cSrc, dstSize); return dstSize; } /* not compressed */
- if (cSrcSize == 1) { memset(dst, *(const BYTE*)cSrc, dstSize); return dstSize; } /* RLE */
-
- /* decoder timing evaluation */
- Q = (U32)(cSrcSize * 16 / dstSize); /* Q < 16 since dstSize > cSrcSize */
- for (n=0; n<3; n++)
- Dtime[n] = algoTime[Q][n].tableTime + (algoTime[Q][n].decode256Time * D256);
-
- Dtime[1] += Dtime[1] >> 4; Dtime[2] += Dtime[2] >> 3; /* advantage to algorithms using less memory, for cache eviction */
-
- if (Dtime[1] < Dtime[0]) algoNb = 1;
-
- return decompress[algoNb](dst, dstSize, cSrc, cSrcSize);
-
- //return HUF_decompress4X2(dst, dstSize, cSrc, cSrcSize); /* multi-streams single-symbol decoding */
- //return HUF_decompress4X4(dst, dstSize, cSrc, cSrcSize); /* multi-streams double-symbols decoding */
- //return HUF_decompress4X6(dst, dstSize, cSrc, cSrcSize); /* multi-streams quad-symbols decoding */
-}
-
-
-
-#endif /* ZSTD_CCOMMON_H_MODULE */
-
-
-/*
- zstd - decompression module fo v0.4 legacy format
- Copyright (C) 2015-2016, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - zstd source repository : https://github.com/Cyan4973/zstd
- - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
-*/
-
-/* ***************************************************************
-* Tuning parameters
-*****************************************************************/
-/*!
- * HEAPMODE :
- * Select how default decompression function ZSTD_decompress() will allocate memory,
- * in memory stack (0), or in memory heap (1, requires malloc())
- */
-#ifndef ZSTD_HEAPMODE
-# define ZSTD_HEAPMODE 1
-#endif
-
-
-/* *******************************************************
-* Includes
-*********************************************************/
-#include <stdlib.h> /* calloc */
-#include <string.h> /* memcpy, memmove */
-#include <stdio.h> /* debug : printf */
-
-
-/* *******************************************************
-* Compiler specifics
-*********************************************************/
-#ifdef _MSC_VER /* Visual Studio */
-# include <intrin.h> /* For Visual 2005 */
-# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
-# pragma warning(disable : 4324) /* disable: C4324: padded structure */
-#endif
-
-
-/* *************************************
-* Local types
-***************************************/
-typedef struct
-{
- blockType_t blockType;
- U32 origSize;
-} blockProperties_t;
-
-
-/* *******************************************************
-* Memory operations
-**********************************************************/
-static void ZSTD_copy4(void* dst, const void* src) { memcpy(dst, src, 4); }
-
-
-/* *************************************
-* Error Management
-***************************************/
-
-/*! ZSTD_isError
-* tells if a return value is an error code */
-static unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
-
-
-/* *************************************************************
-* Context management
-***************************************************************/
-typedef enum { ZSTDds_getFrameHeaderSize, ZSTDds_decodeFrameHeader,
- ZSTDds_decodeBlockHeader, ZSTDds_decompressBlock } ZSTD_dStage;
-
-struct ZSTDv04_Dctx_s
-{
- U32 LLTable[FSE_DTABLE_SIZE_U32(LLFSELog)];
- U32 OffTable[FSE_DTABLE_SIZE_U32(OffFSELog)];
- U32 MLTable[FSE_DTABLE_SIZE_U32(MLFSELog)];
- const void* previousDstEnd;
- const void* base;
- const void* vBase;
- const void* dictEnd;
- size_t expected;
- size_t headerSize;
- ZSTD_parameters params;
- blockType_t bType;
- ZSTD_dStage stage;
- const BYTE* litPtr;
- size_t litSize;
- BYTE litBuffer[BLOCKSIZE + 8 /* margin for wildcopy */];
- BYTE headerBuffer[ZSTD_frameHeaderSize_max];
-}; /* typedef'd to ZSTD_DCtx within "zstd_static.h" */
-
-static size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx)
-{
- dctx->expected = ZSTD_frameHeaderSize_min;
- dctx->stage = ZSTDds_getFrameHeaderSize;
- dctx->previousDstEnd = NULL;
- dctx->base = NULL;
- dctx->vBase = NULL;
- dctx->dictEnd = NULL;
- return 0;
-}
-
-static ZSTD_DCtx* ZSTD_createDCtx(void)
-{
- ZSTD_DCtx* dctx = (ZSTD_DCtx*)malloc(sizeof(ZSTD_DCtx));
- if (dctx==NULL) return NULL;
- ZSTD_resetDCtx(dctx);
- return dctx;
-}
-
-static size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx)
-{
- free(dctx);
- return 0;
-}
-
-
-/* *************************************************************
-* Decompression section
-***************************************************************/
-/** ZSTD_decodeFrameHeader_Part1
-* decode the 1st part of the Frame Header, which tells Frame Header size.
-* srcSize must be == ZSTD_frameHeaderSize_min
-* @return : the full size of the Frame Header */
-static size_t ZSTD_decodeFrameHeader_Part1(ZSTD_DCtx* zc, const void* src, size_t srcSize)
-{
- U32 magicNumber;
- if (srcSize != ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong);
- magicNumber = MEM_readLE32(src);
- if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
- zc->headerSize = ZSTD_frameHeaderSize_min;
- return zc->headerSize;
-}
-
-
-static size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize)
-{
- U32 magicNumber;
- if (srcSize < ZSTD_frameHeaderSize_min) return ZSTD_frameHeaderSize_max;
- magicNumber = MEM_readLE32(src);
- if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
- memset(params, 0, sizeof(*params));
- params->windowLog = (((const BYTE*)src)[4] & 15) + ZSTD_WINDOWLOG_ABSOLUTEMIN;
- if ((((const BYTE*)src)[4] >> 4) != 0) return ERROR(frameParameter_unsupported); /* reserved bits */
- return 0;
-}
-
-/** ZSTD_decodeFrameHeader_Part2
-* decode the full Frame Header
-* srcSize must be the size provided by ZSTD_decodeFrameHeader_Part1
-* @return : 0, or an error code, which can be tested using ZSTD_isError() */
-static size_t ZSTD_decodeFrameHeader_Part2(ZSTD_DCtx* zc, const void* src, size_t srcSize)
-{
- size_t result;
- if (srcSize != zc->headerSize) return ERROR(srcSize_wrong);
- result = ZSTD_getFrameParams(&(zc->params), src, srcSize);
+
+ /* get last non-null symbol weight (implied, total must be 2^n) */
+ tableLog = BIT_highbit32(weightTotal) + 1;
+ if (tableLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(corruption_detected);
+ {
+ U32 total = 1 << tableLog;
+ U32 rest = total - weightTotal;
+ U32 verif = 1 << BIT_highbit32(rest);
+ U32 lastWeight = BIT_highbit32(rest) + 1;
+ if (verif != rest) return ERROR(corruption_detected); /* last value must be a clean power of 2 */
+ huffWeight[oSize] = (BYTE)lastWeight;
+ rankStats[lastWeight]++;
+ }
+
+ /* check tree construction validity */
+ if ((rankStats[1] < 2) || (rankStats[1] & 1)) return ERROR(corruption_detected); /* by construction : at least 2 elts of rank 1, must be even */
+
+ /* results */
+ *nbSymbolsPtr = (U32)(oSize+1);
+ *tableLogPtr = tableLog;
+ return iSize+1;
+}
+
+
+/**************************/
+/* single-symbol decoding */
+/**************************/
+
+static size_t HUF_readDTableX2 (U16* DTable, const void* src, size_t srcSize)
+{
+ BYTE huffWeight[HUF_MAX_SYMBOL_VALUE + 1];
+ U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1]; /* large enough for values from 0 to 16 */
+ U32 tableLog = 0;
+ size_t iSize;
+ U32 nbSymbols = 0;
+ U32 n;
+ U32 nextRankStart;
+ void* const dtPtr = DTable + 1;
+ HUF_DEltX2* const dt = (HUF_DEltX2*)dtPtr;
+
+ HUF_STATIC_ASSERT(sizeof(HUF_DEltX2) == sizeof(U16)); /* if compilation fails here, assertion is false */
+ //memset(huffWeight, 0, sizeof(huffWeight)); /* is not necessary, even though some analyzer complain ... */
+
+ iSize = HUF_readStats(huffWeight, HUF_MAX_SYMBOL_VALUE + 1, rankVal, &nbSymbols, &tableLog, src, srcSize);
+ if (HUF_isError(iSize)) return iSize;
+
+ /* check result */
+ if (tableLog > DTable[0]) return ERROR(tableLog_tooLarge); /* DTable is too small */
+ DTable[0] = (U16)tableLog; /* maybe should separate sizeof DTable, as allocated, from used size of DTable, in case of DTable re-use */
+
+ /* Prepare ranks */
+ nextRankStart = 0;
+ for (n=1; n<=tableLog; n++)
+ {
+ U32 current = nextRankStart;
+ nextRankStart += (rankVal[n] << (n-1));
+ rankVal[n] = current;
+ }
+
+ /* fill DTable */
+ for (n=0; n<nbSymbols; n++)
+ {
+ const U32 w = huffWeight[n];
+ const U32 length = (1 << w) >> 1;
+ U32 i;
+ HUF_DEltX2 D;
+ D.byte = (BYTE)n; D.nbBits = (BYTE)(tableLog + 1 - w);
+ for (i = rankVal[w]; i < rankVal[w] + length; i++)
+ dt[i] = D;
+ rankVal[w] += length;
+ }
+
+ return iSize;
+}
+
+static BYTE HUF_decodeSymbolX2(BIT_DStream_t* Dstream, const HUF_DEltX2* dt, const U32 dtLog)
+{
+ const size_t val = BIT_lookBitsFast(Dstream, dtLog); /* note : dtLog >= 1 */
+ const BYTE c = dt[val].byte;
+ BIT_skipBits(Dstream, dt[val].nbBits);
+ return c;
+}
+
+#define HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr) \
+ *ptr++ = HUF_decodeSymbolX2(DStreamPtr, dt, dtLog)
+
+#define HUF_DECODE_SYMBOLX2_1(ptr, DStreamPtr) \
+ if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \
+ HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr)
+
+#define HUF_DECODE_SYMBOLX2_2(ptr, DStreamPtr) \
+ if (MEM_64bits()) \
+ HUF_DECODE_SYMBOLX2_0(ptr, DStreamPtr)
+
+static inline size_t HUF_decodeStreamX2(BYTE* p, BIT_DStream_t* const bitDPtr, BYTE* const pEnd, const HUF_DEltX2* const dt, const U32 dtLog)
+{
+ BYTE* const pStart = p;
+
+ /* up to 4 symbols at a time */
+ while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-4))
+ {
+ HUF_DECODE_SYMBOLX2_2(p, bitDPtr);
+ HUF_DECODE_SYMBOLX2_1(p, bitDPtr);
+ HUF_DECODE_SYMBOLX2_2(p, bitDPtr);
+ HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
+ }
+
+ /* closer to the end */
+ while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd))
+ HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
+
+ /* no more data to retrieve from bitstream, hence no need to reload */
+ while (p < pEnd)
+ HUF_DECODE_SYMBOLX2_0(p, bitDPtr);
+
+ return pEnd-pStart;
+}
+
+
+static size_t HUF_decompress4X2_usingDTable(
+ void* dst, size_t dstSize,
+ const void* cSrc, size_t cSrcSize,
+ const U16* DTable)
+{
+ if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
+
+ {
+ const BYTE* const istart = (const BYTE*) cSrc;
+ BYTE* const ostart = (BYTE*) dst;
+ BYTE* const oend = ostart + dstSize;
+ const void* const dtPtr = DTable;
+ const HUF_DEltX2* const dt = ((const HUF_DEltX2*)dtPtr) +1;
+ const U32 dtLog = DTable[0];
+ size_t errorCode;
+
+ /* Init */
+ BIT_DStream_t bitD1;
+ BIT_DStream_t bitD2;
+ BIT_DStream_t bitD3;
+ BIT_DStream_t bitD4;
+ const size_t length1 = MEM_readLE16(istart);
+ const size_t length2 = MEM_readLE16(istart+2);
+ const size_t length3 = MEM_readLE16(istart+4);
+ size_t length4;
+ const BYTE* const istart1 = istart + 6; /* jumpTable */
+ const BYTE* const istart2 = istart1 + length1;
+ const BYTE* const istart3 = istart2 + length2;
+ const BYTE* const istart4 = istart3 + length3;
+ const size_t segmentSize = (dstSize+3) / 4;
+ BYTE* const opStart2 = ostart + segmentSize;
+ BYTE* const opStart3 = opStart2 + segmentSize;
+ BYTE* const opStart4 = opStart3 + segmentSize;
+ BYTE* op1 = ostart;
+ BYTE* op2 = opStart2;
+ BYTE* op3 = opStart3;
+ BYTE* op4 = opStart4;
+ U32 endSignal;
+
+ length4 = cSrcSize - (length1 + length2 + length3 + 6);
+ if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
+ errorCode = BIT_initDStream(&bitD1, istart1, length1);
+ if (HUF_isError(errorCode)) return errorCode;
+ errorCode = BIT_initDStream(&bitD2, istart2, length2);
+ if (HUF_isError(errorCode)) return errorCode;
+ errorCode = BIT_initDStream(&bitD3, istart3, length3);
+ if (HUF_isError(errorCode)) return errorCode;
+ errorCode = BIT_initDStream(&bitD4, istart4, length4);
+ if (HUF_isError(errorCode)) return errorCode;
+
+ /* 16-32 symbols per loop (4-8 symbols per stream) */
+ endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
+ for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; )
+ {
+ HUF_DECODE_SYMBOLX2_2(op1, &bitD1);
+ HUF_DECODE_SYMBOLX2_2(op2, &bitD2);
+ HUF_DECODE_SYMBOLX2_2(op3, &bitD3);
+ HUF_DECODE_SYMBOLX2_2(op4, &bitD4);
+ HUF_DECODE_SYMBOLX2_1(op1, &bitD1);
+ HUF_DECODE_SYMBOLX2_1(op2, &bitD2);
+ HUF_DECODE_SYMBOLX2_1(op3, &bitD3);
+ HUF_DECODE_SYMBOLX2_1(op4, &bitD4);
+ HUF_DECODE_SYMBOLX2_2(op1, &bitD1);
+ HUF_DECODE_SYMBOLX2_2(op2, &bitD2);
+ HUF_DECODE_SYMBOLX2_2(op3, &bitD3);
+ HUF_DECODE_SYMBOLX2_2(op4, &bitD4);
+ HUF_DECODE_SYMBOLX2_0(op1, &bitD1);
+ HUF_DECODE_SYMBOLX2_0(op2, &bitD2);
+ HUF_DECODE_SYMBOLX2_0(op3, &bitD3);
+ HUF_DECODE_SYMBOLX2_0(op4, &bitD4);
+
+ endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
+ }
+
+ /* check corruption */
+ if (op1 > opStart2) return ERROR(corruption_detected);
+ if (op2 > opStart3) return ERROR(corruption_detected);
+ if (op3 > opStart4) return ERROR(corruption_detected);
+ /* note : op4 supposed already verified within main loop */
+
+ /* finish bitStreams one by one */
+ HUF_decodeStreamX2(op1, &bitD1, opStart2, dt, dtLog);
+ HUF_decodeStreamX2(op2, &bitD2, opStart3, dt, dtLog);
+ HUF_decodeStreamX2(op3, &bitD3, opStart4, dt, dtLog);
+ HUF_decodeStreamX2(op4, &bitD4, oend, dt, dtLog);
+
+ /* check */
+ endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4);
+ if (!endSignal) return ERROR(corruption_detected);
+
+ /* decoded size */
+ return dstSize;
+ }
+}
+
+
+static size_t HUF_decompress4X2 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
+{
+ HUF_CREATE_STATIC_DTABLEX2(DTable, HUF_MAX_TABLELOG);
+ const BYTE* ip = (const BYTE*) cSrc;
+ size_t errorCode;
+
+ errorCode = HUF_readDTableX2 (DTable, cSrc, cSrcSize);
+ if (HUF_isError(errorCode)) return errorCode;
+ if (errorCode >= cSrcSize) return ERROR(srcSize_wrong);
+ ip += errorCode;
+ cSrcSize -= errorCode;
+
+ return HUF_decompress4X2_usingDTable (dst, dstSize, ip, cSrcSize, DTable);
+}
+
+
+/***************************/
+/* double-symbols decoding */
+/***************************/
+
+static void HUF_fillDTableX4Level2(HUF_DEltX4* DTable, U32 sizeLog, const U32 consumed,
+ const U32* rankValOrigin, const int minWeight,
+ const sortedSymbol_t* sortedSymbols, const U32 sortedListSize,
+ U32 nbBitsBaseline, U16 baseSeq)
+{
+ HUF_DEltX4 DElt;
+ U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1];
+ U32 s;
+
+ /* get pre-calculated rankVal */
+ memcpy(rankVal, rankValOrigin, sizeof(rankVal));
+
+ /* fill skipped values */
+ if (minWeight>1)
+ {
+ U32 i, skipSize = rankVal[minWeight];
+ MEM_writeLE16(&(DElt.sequence), baseSeq);
+ DElt.nbBits = (BYTE)(consumed);
+ DElt.length = 1;
+ for (i = 0; i < skipSize; i++)
+ DTable[i] = DElt;
+ }
+
+ /* fill DTable */
+ for (s=0; s<sortedListSize; s++) /* note : sortedSymbols already skipped */
+ {
+ const U32 symbol = sortedSymbols[s].symbol;
+ const U32 weight = sortedSymbols[s].weight;
+ const U32 nbBits = nbBitsBaseline - weight;
+ const U32 length = 1 << (sizeLog-nbBits);
+ const U32 start = rankVal[weight];
+ U32 i = start;
+ const U32 end = start + length;
+
+ MEM_writeLE16(&(DElt.sequence), (U16)(baseSeq + (symbol << 8)));
+ DElt.nbBits = (BYTE)(nbBits + consumed);
+ DElt.length = 2;
+ do { DTable[i++] = DElt; } while (i<end); /* since length >= 1 */
+
+ rankVal[weight] += length;
+ }
+}
+
+typedef U32 rankVal_t[HUF_ABSOLUTEMAX_TABLELOG][HUF_ABSOLUTEMAX_TABLELOG + 1];
+
+static void HUF_fillDTableX4(HUF_DEltX4* DTable, const U32 targetLog,
+ const sortedSymbol_t* sortedList, const U32 sortedListSize,
+ const U32* rankStart, rankVal_t rankValOrigin, const U32 maxWeight,
+ const U32 nbBitsBaseline)
+{
+ U32 rankVal[HUF_ABSOLUTEMAX_TABLELOG + 1];
+ const int scaleLog = nbBitsBaseline - targetLog; /* note : targetLog >= srcLog, hence scaleLog <= 1 */
+ const U32 minBits = nbBitsBaseline - maxWeight;
+ U32 s;
+
+ memcpy(rankVal, rankValOrigin, sizeof(rankVal));
+
+ /* fill DTable */
+ for (s=0; s<sortedListSize; s++)
+ {
+ const U16 symbol = sortedList[s].symbol;
+ const U32 weight = sortedList[s].weight;
+ const U32 nbBits = nbBitsBaseline - weight;
+ const U32 start = rankVal[weight];
+ const U32 length = 1 << (targetLog-nbBits);
+
+ if (targetLog-nbBits >= minBits) /* enough room for a second symbol */
+ {
+ U32 sortedRank;
+ int minWeight = nbBits + scaleLog;
+ if (minWeight < 1) minWeight = 1;
+ sortedRank = rankStart[minWeight];
+ HUF_fillDTableX4Level2(DTable+start, targetLog-nbBits, nbBits,
+ rankValOrigin[nbBits], minWeight,
+ sortedList+sortedRank, sortedListSize-sortedRank,
+ nbBitsBaseline, symbol);
+ }
+ else
+ {
+ U32 i;
+ const U32 end = start + length;
+ HUF_DEltX4 DElt;
+
+ MEM_writeLE16(&(DElt.sequence), symbol);
+ DElt.nbBits = (BYTE)(nbBits);
+ DElt.length = 1;
+ for (i = start; i < end; i++)
+ DTable[i] = DElt;
+ }
+ rankVal[weight] += length;
+ }
+}
+
+static size_t HUF_readDTableX4 (U32* DTable, const void* src, size_t srcSize)
+{
+ BYTE weightList[HUF_MAX_SYMBOL_VALUE + 1];
+ sortedSymbol_t sortedSymbol[HUF_MAX_SYMBOL_VALUE + 1];
+ U32 rankStats[HUF_ABSOLUTEMAX_TABLELOG + 1] = { 0 };
+ U32 rankStart0[HUF_ABSOLUTEMAX_TABLELOG + 2] = { 0 };
+ U32* const rankStart = rankStart0+1;
+ rankVal_t rankVal;
+ U32 tableLog, maxW, sizeOfSort, nbSymbols;
+ const U32 memLog = DTable[0];
+ size_t iSize;
+ void* dtPtr = DTable;
+ HUF_DEltX4* const dt = ((HUF_DEltX4*)dtPtr) + 1;
+
+ HUF_STATIC_ASSERT(sizeof(HUF_DEltX4) == sizeof(U32)); /* if compilation fails here, assertion is false */
+ if (memLog > HUF_ABSOLUTEMAX_TABLELOG) return ERROR(tableLog_tooLarge);
+ //memset(weightList, 0, sizeof(weightList)); /* is not necessary, even though some analyzer complain ... */
+
+ iSize = HUF_readStats(weightList, HUF_MAX_SYMBOL_VALUE + 1, rankStats, &nbSymbols, &tableLog, src, srcSize);
+ if (HUF_isError(iSize)) return iSize;
+
+ /* check result */
+ if (tableLog > memLog) return ERROR(tableLog_tooLarge); /* DTable can't fit code depth */
+
+ /* find maxWeight */
+ for (maxW = tableLog; rankStats[maxW]==0; maxW--)
+ { if (!maxW) return ERROR(GENERIC); } /* necessarily finds a solution before maxW==0 */
+
+ /* Get start index of each weight */
+ {
+ U32 w, nextRankStart = 0;
+ for (w=1; w<=maxW; w++)
+ {
+ U32 current = nextRankStart;
+ nextRankStart += rankStats[w];
+ rankStart[w] = current;
+ }
+ rankStart[0] = nextRankStart; /* put all 0w symbols at the end of sorted list*/
+ sizeOfSort = nextRankStart;
+ }
+
+ /* sort symbols by weight */
+ {
+ U32 s;
+ for (s=0; s<nbSymbols; s++)
+ {
+ U32 w = weightList[s];
+ U32 r = rankStart[w]++;
+ sortedSymbol[r].symbol = (BYTE)s;
+ sortedSymbol[r].weight = (BYTE)w;
+ }
+ rankStart[0] = 0; /* forget 0w symbols; this is beginning of weight(1) */
+ }
+
+ /* Build rankVal */
+ {
+ const U32 minBits = tableLog+1 - maxW;
+ U32 nextRankVal = 0;
+ U32 w, consumed;
+ const int rescale = (memLog-tableLog) - 1; /* tableLog <= memLog */
+ U32* rankVal0 = rankVal[0];
+ for (w=1; w<=maxW; w++)
+ {
+ U32 current = nextRankVal;
+ nextRankVal += rankStats[w] << (w+rescale);
+ rankVal0[w] = current;
+ }
+ for (consumed = minBits; consumed <= memLog - minBits; consumed++)
+ {
+ U32* rankValPtr = rankVal[consumed];
+ for (w = 1; w <= maxW; w++)
+ {
+ rankValPtr[w] = rankVal0[w] >> consumed;
+ }
+ }
+ }
+
+ HUF_fillDTableX4(dt, memLog,
+ sortedSymbol, sizeOfSort,
+ rankStart0, rankVal, maxW,
+ tableLog+1);
+
+ return iSize;
+}
+
+
+static U32 HUF_decodeSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog)
+{
+ const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */
+ memcpy(op, dt+val, 2);
+ BIT_skipBits(DStream, dt[val].nbBits);
+ return dt[val].length;
+}
+
+static U32 HUF_decodeLastSymbolX4(void* op, BIT_DStream_t* DStream, const HUF_DEltX4* dt, const U32 dtLog)
+{
+ const size_t val = BIT_lookBitsFast(DStream, dtLog); /* note : dtLog >= 1 */
+ memcpy(op, dt+val, 1);
+ if (dt[val].length==1) BIT_skipBits(DStream, dt[val].nbBits);
+ else
+ {
+ if (DStream->bitsConsumed < (sizeof(DStream->bitContainer)*8))
+ {
+ BIT_skipBits(DStream, dt[val].nbBits);
+ if (DStream->bitsConsumed > (sizeof(DStream->bitContainer)*8))
+ DStream->bitsConsumed = (sizeof(DStream->bitContainer)*8); /* ugly hack; works only because it's the last symbol. Note : can't easily extract nbBits from just this symbol */
+ }
+ }
+ return 1;
+}
+
+
+#define HUF_DECODE_SYMBOLX4_0(ptr, DStreamPtr) \
+ ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
+
+#define HUF_DECODE_SYMBOLX4_1(ptr, DStreamPtr) \
+ if (MEM_64bits() || (HUF_MAX_TABLELOG<=12)) \
+ ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
+
+#define HUF_DECODE_SYMBOLX4_2(ptr, DStreamPtr) \
+ if (MEM_64bits()) \
+ ptr += HUF_decodeSymbolX4(ptr, DStreamPtr, dt, dtLog)
+
+static inline size_t HUF_decodeStreamX4(BYTE* p, BIT_DStream_t* bitDPtr, BYTE* const pEnd, const HUF_DEltX4* const dt, const U32 dtLog)
+{
+ BYTE* const pStart = p;
+
+ /* up to 8 symbols at a time */
+ while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p < pEnd-7))
+ {
+ HUF_DECODE_SYMBOLX4_2(p, bitDPtr);
+ HUF_DECODE_SYMBOLX4_1(p, bitDPtr);
+ HUF_DECODE_SYMBOLX4_2(p, bitDPtr);
+ HUF_DECODE_SYMBOLX4_0(p, bitDPtr);
+ }
+
+ /* closer to the end */
+ while ((BIT_reloadDStream(bitDPtr) == BIT_DStream_unfinished) && (p <= pEnd-2))
+ HUF_DECODE_SYMBOLX4_0(p, bitDPtr);
+
+ while (p <= pEnd-2)
+ HUF_DECODE_SYMBOLX4_0(p, bitDPtr); /* no need to reload : reached the end of DStream */
+
+ if (p < pEnd)
+ p += HUF_decodeLastSymbolX4(p, bitDPtr, dt, dtLog);
+
+ return p-pStart;
+}
+
+static size_t HUF_decompress4X4_usingDTable(
+ void* dst, size_t dstSize,
+ const void* cSrc, size_t cSrcSize,
+ const U32* DTable)
+{
+ if (cSrcSize < 10) return ERROR(corruption_detected); /* strict minimum : jump table + 1 byte per stream */
+
+ {
+ const BYTE* const istart = (const BYTE*) cSrc;
+ BYTE* const ostart = (BYTE*) dst;
+ BYTE* const oend = ostart + dstSize;
+ const void* const dtPtr = DTable;
+ const HUF_DEltX4* const dt = ((const HUF_DEltX4*)dtPtr) +1;
+ const U32 dtLog = DTable[0];
+ size_t errorCode;
+
+ /* Init */
+ BIT_DStream_t bitD1;
+ BIT_DStream_t bitD2;
+ BIT_DStream_t bitD3;
+ BIT_DStream_t bitD4;
+ const size_t length1 = MEM_readLE16(istart);
+ const size_t length2 = MEM_readLE16(istart+2);
+ const size_t length3 = MEM_readLE16(istart+4);
+ size_t length4;
+ const BYTE* const istart1 = istart + 6; /* jumpTable */
+ const BYTE* const istart2 = istart1 + length1;
+ const BYTE* const istart3 = istart2 + length2;
+ const BYTE* const istart4 = istart3 + length3;
+ const size_t segmentSize = (dstSize+3) / 4;
+ BYTE* const opStart2 = ostart + segmentSize;
+ BYTE* const opStart3 = opStart2 + segmentSize;
+ BYTE* const opStart4 = opStart3 + segmentSize;
+ BYTE* op1 = ostart;
+ BYTE* op2 = opStart2;
+ BYTE* op3 = opStart3;
+ BYTE* op4 = opStart4;
+ U32 endSignal;
+
+ length4 = cSrcSize - (length1 + length2 + length3 + 6);
+ if (length4 > cSrcSize) return ERROR(corruption_detected); /* overflow */
+ errorCode = BIT_initDStream(&bitD1, istart1, length1);
+ if (HUF_isError(errorCode)) return errorCode;
+ errorCode = BIT_initDStream(&bitD2, istart2, length2);
+ if (HUF_isError(errorCode)) return errorCode;
+ errorCode = BIT_initDStream(&bitD3, istart3, length3);
+ if (HUF_isError(errorCode)) return errorCode;
+ errorCode = BIT_initDStream(&bitD4, istart4, length4);
+ if (HUF_isError(errorCode)) return errorCode;
+
+ /* 16-32 symbols per loop (4-8 symbols per stream) */
+ endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
+ for ( ; (endSignal==BIT_DStream_unfinished) && (op4<(oend-7)) ; )
+ {
+ HUF_DECODE_SYMBOLX4_2(op1, &bitD1);
+ HUF_DECODE_SYMBOLX4_2(op2, &bitD2);
+ HUF_DECODE_SYMBOLX4_2(op3, &bitD3);
+ HUF_DECODE_SYMBOLX4_2(op4, &bitD4);
+ HUF_DECODE_SYMBOLX4_1(op1, &bitD1);
+ HUF_DECODE_SYMBOLX4_1(op2, &bitD2);
+ HUF_DECODE_SYMBOLX4_1(op3, &bitD3);
+ HUF_DECODE_SYMBOLX4_1(op4, &bitD4);
+ HUF_DECODE_SYMBOLX4_2(op1, &bitD1);
+ HUF_DECODE_SYMBOLX4_2(op2, &bitD2);
+ HUF_DECODE_SYMBOLX4_2(op3, &bitD3);
+ HUF_DECODE_SYMBOLX4_2(op4, &bitD4);
+ HUF_DECODE_SYMBOLX4_0(op1, &bitD1);
+ HUF_DECODE_SYMBOLX4_0(op2, &bitD2);
+ HUF_DECODE_SYMBOLX4_0(op3, &bitD3);
+ HUF_DECODE_SYMBOLX4_0(op4, &bitD4);
+
+ endSignal = BIT_reloadDStream(&bitD1) | BIT_reloadDStream(&bitD2) | BIT_reloadDStream(&bitD3) | BIT_reloadDStream(&bitD4);
+ }
+
+ /* check corruption */
+ if (op1 > opStart2) return ERROR(corruption_detected);
+ if (op2 > opStart3) return ERROR(corruption_detected);
+ if (op3 > opStart4) return ERROR(corruption_detected);
+ /* note : op4 supposed already verified within main loop */
+
+ /* finish bitStreams one by one */
+ HUF_decodeStreamX4(op1, &bitD1, opStart2, dt, dtLog);
+ HUF_decodeStreamX4(op2, &bitD2, opStart3, dt, dtLog);
+ HUF_decodeStreamX4(op3, &bitD3, opStart4, dt, dtLog);
+ HUF_decodeStreamX4(op4, &bitD4, oend, dt, dtLog);
+
+ /* check */
+ endSignal = BIT_endOfDStream(&bitD1) & BIT_endOfDStream(&bitD2) & BIT_endOfDStream(&bitD3) & BIT_endOfDStream(&bitD4);
+ if (!endSignal) return ERROR(corruption_detected);
+
+ /* decoded size */
+ return dstSize;
+ }
+}
+
+
+static size_t HUF_decompress4X4 (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
+{
+ HUF_CREATE_STATIC_DTABLEX4(DTable, HUF_MAX_TABLELOG);
+ const BYTE* ip = (const BYTE*) cSrc;
+
+ size_t hSize = HUF_readDTableX4 (DTable, cSrc, cSrcSize);
+ if (HUF_isError(hSize)) return hSize;
+ if (hSize >= cSrcSize) return ERROR(srcSize_wrong);
+ ip += hSize;
+ cSrcSize -= hSize;
+
+ return HUF_decompress4X4_usingDTable (dst, dstSize, ip, cSrcSize, DTable);
+}
+
+
+/**********************************/
+/* Generic decompression selector */
+/**********************************/
+
+typedef struct { U32 tableTime; U32 decode256Time; } algo_time_t;
+static const algo_time_t algoTime[16 /* Quantization */][3 /* single, double, quad */] =
+{
+ /* single, double, quad */
+ {{0,0}, {1,1}, {2,2}}, /* Q==0 : impossible */
+ {{0,0}, {1,1}, {2,2}}, /* Q==1 : impossible */
+ {{ 38,130}, {1313, 74}, {2151, 38}}, /* Q == 2 : 12-18% */
+ {{ 448,128}, {1353, 74}, {2238, 41}}, /* Q == 3 : 18-25% */
+ {{ 556,128}, {1353, 74}, {2238, 47}}, /* Q == 4 : 25-32% */
+ {{ 714,128}, {1418, 74}, {2436, 53}}, /* Q == 5 : 32-38% */
+ {{ 883,128}, {1437, 74}, {2464, 61}}, /* Q == 6 : 38-44% */
+ {{ 897,128}, {1515, 75}, {2622, 68}}, /* Q == 7 : 44-50% */
+ {{ 926,128}, {1613, 75}, {2730, 75}}, /* Q == 8 : 50-56% */
+ {{ 947,128}, {1729, 77}, {3359, 77}}, /* Q == 9 : 56-62% */
+ {{1107,128}, {2083, 81}, {4006, 84}}, /* Q ==10 : 62-69% */
+ {{1177,128}, {2379, 87}, {4785, 88}}, /* Q ==11 : 69-75% */
+ {{1242,128}, {2415, 93}, {5155, 84}}, /* Q ==12 : 75-81% */
+ {{1349,128}, {2644,106}, {5260,106}}, /* Q ==13 : 81-87% */
+ {{1455,128}, {2422,124}, {4174,124}}, /* Q ==14 : 87-93% */
+ {{ 722,128}, {1891,145}, {1936,146}}, /* Q ==15 : 93-99% */
+};
+
+typedef size_t (*decompressionAlgo)(void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize);
+
+static size_t HUF_decompress (void* dst, size_t dstSize, const void* cSrc, size_t cSrcSize)
+{
+ static const decompressionAlgo decompress[3] = { HUF_decompress4X2, HUF_decompress4X4, NULL };
+ /* estimate decompression time */
+ U32 Q;
+ const U32 D256 = (U32)(dstSize >> 8);
+ U32 Dtime[3];
+ U32 algoNb = 0;
+ int n;
+
+ /* validation checks */
+ if (dstSize == 0) return ERROR(dstSize_tooSmall);
+ if (cSrcSize > dstSize) return ERROR(corruption_detected); /* invalid */
+ if (cSrcSize == dstSize) { memcpy(dst, cSrc, dstSize); return dstSize; } /* not compressed */
+ if (cSrcSize == 1) { memset(dst, *(const BYTE*)cSrc, dstSize); return dstSize; } /* RLE */
+
+ /* decoder timing evaluation */
+ Q = (U32)(cSrcSize * 16 / dstSize); /* Q < 16 since dstSize > cSrcSize */
+ for (n=0; n<3; n++)
+ Dtime[n] = algoTime[Q][n].tableTime + (algoTime[Q][n].decode256Time * D256);
+
+ Dtime[1] += Dtime[1] >> 4; Dtime[2] += Dtime[2] >> 3; /* advantage to algorithms using less memory, for cache eviction */
+
+ if (Dtime[1] < Dtime[0]) algoNb = 1;
+
+ return decompress[algoNb](dst, dstSize, cSrc, cSrcSize);
+
+ //return HUF_decompress4X2(dst, dstSize, cSrc, cSrcSize); /* multi-streams single-symbol decoding */
+ //return HUF_decompress4X4(dst, dstSize, cSrc, cSrcSize); /* multi-streams double-symbols decoding */
+ //return HUF_decompress4X6(dst, dstSize, cSrc, cSrcSize); /* multi-streams quad-symbols decoding */
+}
+
+
+
+#endif /* ZSTD_CCOMMON_H_MODULE */
+
+
+/*
+ zstd - decompression module fo v0.4 legacy format
+ Copyright (C) 2015-2016, Yann Collet.
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - zstd source repository : https://github.com/Cyan4973/zstd
+ - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+
+/* ***************************************************************
+* Tuning parameters
+*****************************************************************/
+/*!
+ * HEAPMODE :
+ * Select how default decompression function ZSTD_decompress() will allocate memory,
+ * in memory stack (0), or in memory heap (1, requires malloc())
+ */
+#ifndef ZSTD_HEAPMODE
+# define ZSTD_HEAPMODE 1
+#endif
+
+
+/* *******************************************************
+* Includes
+*********************************************************/
+#include <stdlib.h> /* calloc */
+#include <string.h> /* memcpy, memmove */
+#include <stdio.h> /* debug : printf */
+
+
+/* *******************************************************
+* Compiler specifics
+*********************************************************/
+#ifdef _MSC_VER /* Visual Studio */
+# include <intrin.h> /* For Visual 2005 */
+# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
+# pragma warning(disable : 4324) /* disable: C4324: padded structure */
+#endif
+
+
+/* *************************************
+* Local types
+***************************************/
+typedef struct
+{
+ blockType_t blockType;
+ U32 origSize;
+} blockProperties_t;
+
+
+/* *******************************************************
+* Memory operations
+**********************************************************/
+static void ZSTD_copy4(void* dst, const void* src) { memcpy(dst, src, 4); }
+
+
+/* *************************************
+* Error Management
+***************************************/
+
+/*! ZSTD_isError
+* tells if a return value is an error code */
+static unsigned ZSTD_isError(size_t code) { return ERR_isError(code); }
+
+
+/* *************************************************************
+* Context management
+***************************************************************/
+typedef enum { ZSTDds_getFrameHeaderSize, ZSTDds_decodeFrameHeader,
+ ZSTDds_decodeBlockHeader, ZSTDds_decompressBlock } ZSTD_dStage;
+
+struct ZSTDv04_Dctx_s
+{
+ U32 LLTable[FSE_DTABLE_SIZE_U32(LLFSELog)];
+ U32 OffTable[FSE_DTABLE_SIZE_U32(OffFSELog)];
+ U32 MLTable[FSE_DTABLE_SIZE_U32(MLFSELog)];
+ const void* previousDstEnd;
+ const void* base;
+ const void* vBase;
+ const void* dictEnd;
+ size_t expected;
+ size_t headerSize;
+ ZSTD_parameters params;
+ blockType_t bType;
+ ZSTD_dStage stage;
+ const BYTE* litPtr;
+ size_t litSize;
+ BYTE litBuffer[BLOCKSIZE + 8 /* margin for wildcopy */];
+ BYTE headerBuffer[ZSTD_frameHeaderSize_max];
+}; /* typedef'd to ZSTD_DCtx within "zstd_static.h" */
+
+static size_t ZSTD_resetDCtx(ZSTD_DCtx* dctx)
+{
+ dctx->expected = ZSTD_frameHeaderSize_min;
+ dctx->stage = ZSTDds_getFrameHeaderSize;
+ dctx->previousDstEnd = NULL;
+ dctx->base = NULL;
+ dctx->vBase = NULL;
+ dctx->dictEnd = NULL;
+ return 0;
+}
+
+static ZSTD_DCtx* ZSTD_createDCtx(void)
+{
+ ZSTD_DCtx* dctx = (ZSTD_DCtx*)malloc(sizeof(ZSTD_DCtx));
+ if (dctx==NULL) return NULL;
+ ZSTD_resetDCtx(dctx);
+ return dctx;
+}
+
+static size_t ZSTD_freeDCtx(ZSTD_DCtx* dctx)
+{
+ free(dctx);
+ return 0;
+}
+
+
+/* *************************************************************
+* Decompression section
+***************************************************************/
+/** ZSTD_decodeFrameHeader_Part1
+* decode the 1st part of the Frame Header, which tells Frame Header size.
+* srcSize must be == ZSTD_frameHeaderSize_min
+* @return : the full size of the Frame Header */
+static size_t ZSTD_decodeFrameHeader_Part1(ZSTD_DCtx* zc, const void* src, size_t srcSize)
+{
+ U32 magicNumber;
+ if (srcSize != ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong);
+ magicNumber = MEM_readLE32(src);
+ if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
+ zc->headerSize = ZSTD_frameHeaderSize_min;
+ return zc->headerSize;
+}
+
+
+static size_t ZSTD_getFrameParams(ZSTD_parameters* params, const void* src, size_t srcSize)
+{
+ U32 magicNumber;
+ if (srcSize < ZSTD_frameHeaderSize_min) return ZSTD_frameHeaderSize_max;
+ magicNumber = MEM_readLE32(src);
+ if (magicNumber != ZSTD_MAGICNUMBER) return ERROR(prefix_unknown);
+ memset(params, 0, sizeof(*params));
+ params->windowLog = (((const BYTE*)src)[4] & 15) + ZSTD_WINDOWLOG_ABSOLUTEMIN;
+ if ((((const BYTE*)src)[4] >> 4) != 0) return ERROR(frameParameter_unsupported); /* reserved bits */
+ return 0;
+}
+
+/** ZSTD_decodeFrameHeader_Part2
+* decode the full Frame Header
+* srcSize must be the size provided by ZSTD_decodeFrameHeader_Part1
+* @return : 0, or an error code, which can be tested using ZSTD_isError() */
+static size_t ZSTD_decodeFrameHeader_Part2(ZSTD_DCtx* zc, const void* src, size_t srcSize)
+{
+ size_t result;
+ if (srcSize != zc->headerSize) return ERROR(srcSize_wrong);
+ result = ZSTD_getFrameParams(&(zc->params), src, srcSize);
if ((MEM_32bits()) && (zc->params.windowLog > 25)) return ERROR(frameParameter_unsupported);
- return result;
-}
-
-
-static size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bpPtr)
-{
- const BYTE* const in = (const BYTE* const)src;
- BYTE headerFlags;
- U32 cSize;
-
- if (srcSize < 3) return ERROR(srcSize_wrong);
-
- headerFlags = *in;
- cSize = in[2] + (in[1]<<8) + ((in[0] & 7)<<16);
-
- bpPtr->blockType = (blockType_t)(headerFlags >> 6);
- bpPtr->origSize = (bpPtr->blockType == bt_rle) ? cSize : 0;
-
- if (bpPtr->blockType == bt_end) return 0;
- if (bpPtr->blockType == bt_rle) return 1;
- return cSize;
-}
-
-static size_t ZSTD_copyRawBlock(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
- if (srcSize > maxDstSize) return ERROR(dstSize_tooSmall);
+ return result;
+}
+
+
+static size_t ZSTD_getcBlockSize(const void* src, size_t srcSize, blockProperties_t* bpPtr)
+{
+ const BYTE* const in = (const BYTE* const)src;
+ BYTE headerFlags;
+ U32 cSize;
+
+ if (srcSize < 3) return ERROR(srcSize_wrong);
+
+ headerFlags = *in;
+ cSize = in[2] + (in[1]<<8) + ((in[0] & 7)<<16);
+
+ bpPtr->blockType = (blockType_t)(headerFlags >> 6);
+ bpPtr->origSize = (bpPtr->blockType == bt_rle) ? cSize : 0;
+
+ if (bpPtr->blockType == bt_end) return 0;
+ if (bpPtr->blockType == bt_rle) return 1;
+ return cSize;
+}
+
+static size_t ZSTD_copyRawBlock(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+{
+ if (srcSize > maxDstSize) return ERROR(dstSize_tooSmall);
if (srcSize > 0) {
memcpy(dst, src, srcSize);
}
- return srcSize;
-}
-
-
-/** ZSTD_decompressLiterals
- @return : nb of bytes read from src, or an error code*/
-static size_t ZSTD_decompressLiterals(void* dst, size_t* maxDstSizePtr,
- const void* src, size_t srcSize)
-{
- const BYTE* ip = (const BYTE*)src;
-
- const size_t litSize = (MEM_readLE32(src) & 0x1FFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
- const size_t litCSize = (MEM_readLE32(ip+2) & 0xFFFFFF) >> 5; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
-
- if (litSize > *maxDstSizePtr) return ERROR(corruption_detected);
- if (litCSize + 5 > srcSize) return ERROR(corruption_detected);
-
- if (HUF_isError(HUF_decompress(dst, litSize, ip+5, litCSize))) return ERROR(corruption_detected);
-
- *maxDstSizePtr = litSize;
- return litCSize + 5;
-}
-
-
-/** ZSTD_decodeLiteralsBlock
- @return : nb of bytes read from src (< srcSize ) */
-static size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
- const void* src, size_t srcSize) /* note : srcSize < BLOCKSIZE */
-{
- const BYTE* const istart = (const BYTE*) src;
-
- /* any compressed block with literals segment must be at least this size */
- if (srcSize < MIN_CBLOCK_SIZE) return ERROR(corruption_detected);
-
- switch(*istart & 3)
- {
- /* compressed */
- case 0:
- {
- size_t litSize = BLOCKSIZE;
- const size_t readSize = ZSTD_decompressLiterals(dctx->litBuffer, &litSize, src, srcSize);
- dctx->litPtr = dctx->litBuffer;
- dctx->litSize = litSize;
+ return srcSize;
+}
+
+
+/** ZSTD_decompressLiterals
+ @return : nb of bytes read from src, or an error code*/
+static size_t ZSTD_decompressLiterals(void* dst, size_t* maxDstSizePtr,
+ const void* src, size_t srcSize)
+{
+ const BYTE* ip = (const BYTE*)src;
+
+ const size_t litSize = (MEM_readLE32(src) & 0x1FFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
+ const size_t litCSize = (MEM_readLE32(ip+2) & 0xFFFFFF) >> 5; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
+
+ if (litSize > *maxDstSizePtr) return ERROR(corruption_detected);
+ if (litCSize + 5 > srcSize) return ERROR(corruption_detected);
+
+ if (HUF_isError(HUF_decompress(dst, litSize, ip+5, litCSize))) return ERROR(corruption_detected);
+
+ *maxDstSizePtr = litSize;
+ return litCSize + 5;
+}
+
+
+/** ZSTD_decodeLiteralsBlock
+ @return : nb of bytes read from src (< srcSize ) */
+static size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx* dctx,
+ const void* src, size_t srcSize) /* note : srcSize < BLOCKSIZE */
+{
+ const BYTE* const istart = (const BYTE*) src;
+
+ /* any compressed block with literals segment must be at least this size */
+ if (srcSize < MIN_CBLOCK_SIZE) return ERROR(corruption_detected);
+
+ switch(*istart & 3)
+ {
+ /* compressed */
+ case 0:
+ {
+ size_t litSize = BLOCKSIZE;
+ const size_t readSize = ZSTD_decompressLiterals(dctx->litBuffer, &litSize, src, srcSize);
+ dctx->litPtr = dctx->litBuffer;
+ dctx->litSize = litSize;
memset(dctx->litBuffer + dctx->litSize, 0, 8);
- return readSize; /* works if it's an error too */
- }
- case IS_RAW:
- {
- const size_t litSize = (MEM_readLE32(istart) & 0xFFFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
- if (litSize > srcSize-11) /* risk of reading too far with wildcopy */
- {
+ return readSize; /* works if it's an error too */
+ }
+ case IS_RAW:
+ {
+ const size_t litSize = (MEM_readLE32(istart) & 0xFFFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
+ if (litSize > srcSize-11) /* risk of reading too far with wildcopy */
+ {
if (litSize > BLOCKSIZE) return ERROR(corruption_detected);
- if (litSize > srcSize-3) return ERROR(corruption_detected);
- memcpy(dctx->litBuffer, istart, litSize);
- dctx->litPtr = dctx->litBuffer;
- dctx->litSize = litSize;
+ if (litSize > srcSize-3) return ERROR(corruption_detected);
+ memcpy(dctx->litBuffer, istart, litSize);
+ dctx->litPtr = dctx->litBuffer;
+ dctx->litSize = litSize;
memset(dctx->litBuffer + dctx->litSize, 0, 8);
- return litSize+3;
- }
- /* direct reference into compressed stream */
- dctx->litPtr = istart+3;
- dctx->litSize = litSize;
- return litSize+3; }
- case IS_RLE:
- {
- const size_t litSize = (MEM_readLE32(istart) & 0xFFFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
- if (litSize > BLOCKSIZE) return ERROR(corruption_detected);
+ return litSize+3;
+ }
+ /* direct reference into compressed stream */
+ dctx->litPtr = istart+3;
+ dctx->litSize = litSize;
+ return litSize+3; }
+ case IS_RLE:
+ {
+ const size_t litSize = (MEM_readLE32(istart) & 0xFFFFFF) >> 2; /* no buffer issue : srcSize >= MIN_CBLOCK_SIZE */
+ if (litSize > BLOCKSIZE) return ERROR(corruption_detected);
memset(dctx->litBuffer, istart[3], litSize + 8);
- dctx->litPtr = dctx->litBuffer;
- dctx->litSize = litSize;
- return 4;
- }
- default:
- return ERROR(corruption_detected); /* forbidden nominal case */
- }
-}
-
-
-static size_t ZSTD_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* dumpsLengthPtr,
- FSE_DTable* DTableLL, FSE_DTable* DTableML, FSE_DTable* DTableOffb,
- const void* src, size_t srcSize)
-{
- const BYTE* const istart = (const BYTE* const)src;
- const BYTE* ip = istart;
- const BYTE* const iend = istart + srcSize;
- U32 LLtype, Offtype, MLtype;
- U32 LLlog, Offlog, MLlog;
- size_t dumpsLength;
-
- /* check */
- if (srcSize < 5) return ERROR(srcSize_wrong);
-
- /* SeqHead */
- *nbSeq = MEM_readLE16(ip); ip+=2;
- LLtype = *ip >> 6;
- Offtype = (*ip >> 4) & 3;
- MLtype = (*ip >> 2) & 3;
- if (*ip & 2)
- {
- dumpsLength = ip[2];
- dumpsLength += ip[1] << 8;
- ip += 3;
- }
- else
- {
- dumpsLength = ip[1];
- dumpsLength += (ip[0] & 1) << 8;
- ip += 2;
- }
- *dumpsPtr = ip;
- ip += dumpsLength;
- *dumpsLengthPtr = dumpsLength;
-
- /* check */
- if (ip > iend-3) return ERROR(srcSize_wrong); /* min : all 3 are "raw", hence no header, but at least xxLog bits per type */
-
- /* sequences */
- {
- S16 norm[MaxML+1]; /* assumption : MaxML >= MaxLL >= MaxOff */
- size_t headerSize;
-
- /* Build DTables */
- switch(LLtype)
- {
- case bt_rle :
- LLlog = 0;
- FSE_buildDTable_rle(DTableLL, *ip++); break;
- case bt_raw :
- LLlog = LLbits;
- FSE_buildDTable_raw(DTableLL, LLbits); break;
- default :
+ dctx->litPtr = dctx->litBuffer;
+ dctx->litSize = litSize;
+ return 4;
+ }
+ default:
+ return ERROR(corruption_detected); /* forbidden nominal case */
+ }
+}
+
+
+static size_t ZSTD_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* dumpsLengthPtr,
+ FSE_DTable* DTableLL, FSE_DTable* DTableML, FSE_DTable* DTableOffb,
+ const void* src, size_t srcSize)
+{
+ const BYTE* const istart = (const BYTE* const)src;
+ const BYTE* ip = istart;
+ const BYTE* const iend = istart + srcSize;
+ U32 LLtype, Offtype, MLtype;
+ U32 LLlog, Offlog, MLlog;
+ size_t dumpsLength;
+
+ /* check */
+ if (srcSize < 5) return ERROR(srcSize_wrong);
+
+ /* SeqHead */
+ *nbSeq = MEM_readLE16(ip); ip+=2;
+ LLtype = *ip >> 6;
+ Offtype = (*ip >> 4) & 3;
+ MLtype = (*ip >> 2) & 3;
+ if (*ip & 2)
+ {
+ dumpsLength = ip[2];
+ dumpsLength += ip[1] << 8;
+ ip += 3;
+ }
+ else
+ {
+ dumpsLength = ip[1];
+ dumpsLength += (ip[0] & 1) << 8;
+ ip += 2;
+ }
+ *dumpsPtr = ip;
+ ip += dumpsLength;
+ *dumpsLengthPtr = dumpsLength;
+
+ /* check */
+ if (ip > iend-3) return ERROR(srcSize_wrong); /* min : all 3 are "raw", hence no header, but at least xxLog bits per type */
+
+ /* sequences */
+ {
+ S16 norm[MaxML+1]; /* assumption : MaxML >= MaxLL >= MaxOff */
+ size_t headerSize;
+
+ /* Build DTables */
+ switch(LLtype)
+ {
+ case bt_rle :
+ LLlog = 0;
+ FSE_buildDTable_rle(DTableLL, *ip++); break;
+ case bt_raw :
+ LLlog = LLbits;
+ FSE_buildDTable_raw(DTableLL, LLbits); break;
+ default :
{ U32 max = MaxLL;
headerSize = FSE_readNCount(norm, &max, &LLlog, ip, iend-ip);
if (FSE_isError(headerSize)) return ERROR(GENERIC);
@@ -2744,18 +2744,18 @@ static size_t ZSTD_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* d
ip += headerSize;
FSE_buildDTable(DTableLL, norm, max, LLlog);
} }
-
- switch(Offtype)
- {
- case bt_rle :
- Offlog = 0;
- if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */
- FSE_buildDTable_rle(DTableOffb, *ip++ & MaxOff); /* if *ip > MaxOff, data is corrupted */
- break;
- case bt_raw :
- Offlog = Offbits;
- FSE_buildDTable_raw(DTableOffb, Offbits); break;
- default :
+
+ switch(Offtype)
+ {
+ case bt_rle :
+ Offlog = 0;
+ if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */
+ FSE_buildDTable_rle(DTableOffb, *ip++ & MaxOff); /* if *ip > MaxOff, data is corrupted */
+ break;
+ case bt_raw :
+ Offlog = Offbits;
+ FSE_buildDTable_raw(DTableOffb, Offbits); break;
+ default :
{ U32 max = MaxOff;
headerSize = FSE_readNCount(norm, &max, &Offlog, ip, iend-ip);
if (FSE_isError(headerSize)) return ERROR(GENERIC);
@@ -2763,17 +2763,17 @@ static size_t ZSTD_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* d
ip += headerSize;
FSE_buildDTable(DTableOffb, norm, max, Offlog);
} }
-
- switch(MLtype)
- {
- case bt_rle :
- MLlog = 0;
- if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */
- FSE_buildDTable_rle(DTableML, *ip++); break;
- case bt_raw :
- MLlog = MLbits;
- FSE_buildDTable_raw(DTableML, MLbits); break;
- default :
+
+ switch(MLtype)
+ {
+ case bt_rle :
+ MLlog = 0;
+ if (ip > iend-2) return ERROR(srcSize_wrong); /* min : "raw", hence no header, but at least xxLog bits */
+ FSE_buildDTable_rle(DTableML, *ip++); break;
+ case bt_raw :
+ MLlog = MLbits;
+ FSE_buildDTable_raw(DTableML, MLbits); break;
+ default :
{ U32 max = MaxML;
headerSize = FSE_readNCount(norm, &max, &MLlog, ip, iend-ip);
if (FSE_isError(headerSize)) return ERROR(GENERIC);
@@ -2781,357 +2781,357 @@ static size_t ZSTD_decodeSeqHeaders(int* nbSeq, const BYTE** dumpsPtr, size_t* d
ip += headerSize;
FSE_buildDTable(DTableML, norm, max, MLlog);
} } }
-
- return ip-istart;
-}
-
-
-typedef struct {
- size_t litLength;
- size_t offset;
- size_t matchLength;
-} seq_t;
-
-typedef struct {
- BIT_DStream_t DStream;
- FSE_DState_t stateLL;
- FSE_DState_t stateOffb;
- FSE_DState_t stateML;
- size_t prevOffset;
- const BYTE* dumps;
- const BYTE* dumpsEnd;
-} seqState_t;
-
-
-static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState)
-{
- size_t litLength;
- size_t prevOffset;
- size_t offset;
- size_t matchLength;
- const BYTE* dumps = seqState->dumps;
- const BYTE* const de = seqState->dumpsEnd;
-
- /* Literal length */
- litLength = FSE_decodeSymbol(&(seqState->stateLL), &(seqState->DStream));
- prevOffset = litLength ? seq->offset : seqState->prevOffset;
+
+ return ip-istart;
+}
+
+
+typedef struct {
+ size_t litLength;
+ size_t offset;
+ size_t matchLength;
+} seq_t;
+
+typedef struct {
+ BIT_DStream_t DStream;
+ FSE_DState_t stateLL;
+ FSE_DState_t stateOffb;
+ FSE_DState_t stateML;
+ size_t prevOffset;
+ const BYTE* dumps;
+ const BYTE* dumpsEnd;
+} seqState_t;
+
+
+static void ZSTD_decodeSequence(seq_t* seq, seqState_t* seqState)
+{
+ size_t litLength;
+ size_t prevOffset;
+ size_t offset;
+ size_t matchLength;
+ const BYTE* dumps = seqState->dumps;
+ const BYTE* const de = seqState->dumpsEnd;
+
+ /* Literal length */
+ litLength = FSE_decodeSymbol(&(seqState->stateLL), &(seqState->DStream));
+ prevOffset = litLength ? seq->offset : seqState->prevOffset;
if (litLength == MaxLL) {
const U32 add = dumps<de ? *dumps++ : 0;
- if (add < 255) litLength += add;
+ if (add < 255) litLength += add;
else if (dumps + 3 <= de) {
litLength = MEM_readLE24(dumps);
- dumps += 3;
- }
+ dumps += 3;
+ }
if (dumps >= de) { dumps = de-1; } /* late correction, to avoid read overflow (data is now corrupted anyway) */
- }
-
- /* Offset */
+ }
+
+ /* Offset */
{ static const U32 offsetPrefix[MaxOff+1] = {
- 1 /*fake*/, 1, 2, 4, 8, 16, 32, 64, 128, 256,
- 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144,
- 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, /*fake*/ 1, 1, 1, 1, 1 };
- U32 offsetCode, nbBits;
- offsetCode = FSE_decodeSymbol(&(seqState->stateOffb), &(seqState->DStream)); /* <= maxOff, by table construction */
- if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
- nbBits = offsetCode - 1;
- if (offsetCode==0) nbBits = 0; /* cmove */
- offset = offsetPrefix[offsetCode] + BIT_readBits(&(seqState->DStream), nbBits);
- if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
- if (offsetCode==0) offset = prevOffset; /* cmove */
- if (offsetCode | !litLength) seqState->prevOffset = seq->offset; /* cmove */
- }
-
- /* MatchLength */
- matchLength = FSE_decodeSymbol(&(seqState->stateML), &(seqState->DStream));
+ 1 /*fake*/, 1, 2, 4, 8, 16, 32, 64, 128, 256,
+ 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072, 262144,
+ 524288, 1048576, 2097152, 4194304, 8388608, 16777216, 33554432, /*fake*/ 1, 1, 1, 1, 1 };
+ U32 offsetCode, nbBits;
+ offsetCode = FSE_decodeSymbol(&(seqState->stateOffb), &(seqState->DStream)); /* <= maxOff, by table construction */
+ if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
+ nbBits = offsetCode - 1;
+ if (offsetCode==0) nbBits = 0; /* cmove */
+ offset = offsetPrefix[offsetCode] + BIT_readBits(&(seqState->DStream), nbBits);
+ if (MEM_32bits()) BIT_reloadDStream(&(seqState->DStream));
+ if (offsetCode==0) offset = prevOffset; /* cmove */
+ if (offsetCode | !litLength) seqState->prevOffset = seq->offset; /* cmove */
+ }
+
+ /* MatchLength */
+ matchLength = FSE_decodeSymbol(&(seqState->stateML), &(seqState->DStream));
if (matchLength == MaxML) {
const U32 add = dumps<de ? *dumps++ : 0;
- if (add < 255) matchLength += add;
+ if (add < 255) matchLength += add;
else if (dumps + 3 <= de){
matchLength = MEM_readLE24(dumps);
- dumps += 3;
- }
+ dumps += 3;
+ }
if (dumps >= de) { dumps = de-1; } /* late correction, to avoid read overflow (data is now corrupted anyway) */
- }
- matchLength += MINMATCH;
-
- /* save result */
- seq->litLength = litLength;
- seq->offset = offset;
- seq->matchLength = matchLength;
- seqState->dumps = dumps;
-}
-
-
-static size_t ZSTD_execSequence(BYTE* op,
- BYTE* const oend, seq_t sequence,
+ }
+ matchLength += MINMATCH;
+
+ /* save result */
+ seq->litLength = litLength;
+ seq->offset = offset;
+ seq->matchLength = matchLength;
+ seqState->dumps = dumps;
+}
+
+
+static size_t ZSTD_execSequence(BYTE* op,
+ BYTE* const oend, seq_t sequence,
const BYTE** litPtr, const BYTE* const litLimit,
- const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd)
-{
- static const int dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */
+ const BYTE* const base, const BYTE* const vBase, const BYTE* const dictEnd)
+{
+ static const int dec32table[] = { 0, 1, 2, 1, 4, 4, 4, 4 }; /* added */
static const int dec64table[] = { 8, 8, 8, 7, 8, 9,10,11 }; /* subtracted */
- BYTE* const oLitEnd = op + sequence.litLength;
- const size_t sequenceLength = sequence.litLength + sequence.matchLength;
- BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */
- BYTE* const oend_8 = oend-8;
- const BYTE* const litEnd = *litPtr + sequence.litLength;
- const BYTE* match = oLitEnd - sequence.offset;
-
- /* check */
- if (oLitEnd > oend_8) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of 8 from oend */
- if (oMatchEnd > oend) return ERROR(dstSize_tooSmall); /* overwrite beyond dst buffer */
+ BYTE* const oLitEnd = op + sequence.litLength;
+ const size_t sequenceLength = sequence.litLength + sequence.matchLength;
+ BYTE* const oMatchEnd = op + sequenceLength; /* risk : address space overflow (32-bits) */
+ BYTE* const oend_8 = oend-8;
+ const BYTE* const litEnd = *litPtr + sequence.litLength;
+ const BYTE* match = oLitEnd - sequence.offset;
+
+ /* check */
+ if (oLitEnd > oend_8) return ERROR(dstSize_tooSmall); /* last match must start at a minimum distance of 8 from oend */
+ if (oMatchEnd > oend) return ERROR(dstSize_tooSmall); /* overwrite beyond dst buffer */
if (litEnd > litLimit) return ERROR(corruption_detected); /* risk read beyond lit buffer */
-
- /* copy Literals */
- ZSTD_wildcopy(op, *litPtr, sequence.litLength); /* note : oLitEnd <= oend-8 : no risk of overwrite beyond oend */
- op = oLitEnd;
- *litPtr = litEnd; /* update for next sequence */
-
- /* copy Match */
- if (sequence.offset > (size_t)(oLitEnd - base))
- {
- /* offset beyond prefix */
- if (sequence.offset > (size_t)(oLitEnd - vBase))
- return ERROR(corruption_detected);
- match = dictEnd - (base-match);
- if (match + sequence.matchLength <= dictEnd)
- {
- memmove(oLitEnd, match, sequence.matchLength);
- return sequenceLength;
- }
- /* span extDict & currentPrefixSegment */
- {
- size_t length1 = dictEnd - match;
- memmove(oLitEnd, match, length1);
- op = oLitEnd + length1;
- sequence.matchLength -= length1;
- match = base;
+
+ /* copy Literals */
+ ZSTD_wildcopy(op, *litPtr, sequence.litLength); /* note : oLitEnd <= oend-8 : no risk of overwrite beyond oend */
+ op = oLitEnd;
+ *litPtr = litEnd; /* update for next sequence */
+
+ /* copy Match */
+ if (sequence.offset > (size_t)(oLitEnd - base))
+ {
+ /* offset beyond prefix */
+ if (sequence.offset > (size_t)(oLitEnd - vBase))
+ return ERROR(corruption_detected);
+ match = dictEnd - (base-match);
+ if (match + sequence.matchLength <= dictEnd)
+ {
+ memmove(oLitEnd, match, sequence.matchLength);
+ return sequenceLength;
+ }
+ /* span extDict & currentPrefixSegment */
+ {
+ size_t length1 = dictEnd - match;
+ memmove(oLitEnd, match, length1);
+ op = oLitEnd + length1;
+ sequence.matchLength -= length1;
+ match = base;
if (op > oend_8 || sequence.matchLength < MINMATCH) {
while (op < oMatchEnd) *op++ = *match++;
return sequenceLength;
}
- }
- }
+ }
+ }
/* Requirement: op <= oend_8 */
-
- /* match within prefix */
+
+ /* match within prefix */
if (sequence.offset < 8) {
- /* close range match, overlap */
- const int sub2 = dec64table[sequence.offset];
- op[0] = match[0];
- op[1] = match[1];
- op[2] = match[2];
- op[3] = match[3];
- match += dec32table[sequence.offset];
- ZSTD_copy4(op+4, match);
- match -= sub2;
+ /* close range match, overlap */
+ const int sub2 = dec64table[sequence.offset];
+ op[0] = match[0];
+ op[1] = match[1];
+ op[2] = match[2];
+ op[3] = match[3];
+ match += dec32table[sequence.offset];
+ ZSTD_copy4(op+4, match);
+ match -= sub2;
} else {
- ZSTD_copy8(op, match);
- }
- op += 8; match += 8;
-
+ ZSTD_copy8(op, match);
+ }
+ op += 8; match += 8;
+
if (oMatchEnd > oend-(16-MINMATCH))
- {
- if (op < oend_8)
- {
- ZSTD_wildcopy(op, match, oend_8 - op);
- match += oend_8 - op;
- op = oend_8;
- }
- while (op < oMatchEnd) *op++ = *match++;
- }
- else
- {
+ {
+ if (op < oend_8)
+ {
+ ZSTD_wildcopy(op, match, oend_8 - op);
+ match += oend_8 - op;
+ op = oend_8;
+ }
+ while (op < oMatchEnd) *op++ = *match++;
+ }
+ else
+ {
ZSTD_wildcopy(op, match, (ptrdiff_t)sequence.matchLength-8); /* works even if matchLength < 8, but must be signed */
- }
- return sequenceLength;
-}
-
-
-static size_t ZSTD_decompressSequences(
- ZSTD_DCtx* dctx,
- void* dst, size_t maxDstSize,
- const void* seqStart, size_t seqSize)
-{
- const BYTE* ip = (const BYTE*)seqStart;
- const BYTE* const iend = ip + seqSize;
- BYTE* const ostart = (BYTE* const)dst;
- BYTE* op = ostart;
- BYTE* const oend = ostart + maxDstSize;
- size_t errorCode, dumpsLength;
- const BYTE* litPtr = dctx->litPtr;
- const BYTE* const litEnd = litPtr + dctx->litSize;
- int nbSeq;
- const BYTE* dumps;
- U32* DTableLL = dctx->LLTable;
- U32* DTableML = dctx->MLTable;
- U32* DTableOffb = dctx->OffTable;
- const BYTE* const base = (const BYTE*) (dctx->base);
- const BYTE* const vBase = (const BYTE*) (dctx->vBase);
- const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd);
-
- /* Build Decoding Tables */
- errorCode = ZSTD_decodeSeqHeaders(&nbSeq, &dumps, &dumpsLength,
- DTableLL, DTableML, DTableOffb,
- ip, iend-ip);
- if (ZSTD_isError(errorCode)) return errorCode;
- ip += errorCode;
-
- /* Regen sequences */
- {
- seq_t sequence;
- seqState_t seqState;
-
- memset(&sequence, 0, sizeof(sequence));
- sequence.offset = 4;
- seqState.dumps = dumps;
- seqState.dumpsEnd = dumps + dumpsLength;
- seqState.prevOffset = 4;
- errorCode = BIT_initDStream(&(seqState.DStream), ip, iend-ip);
- if (ERR_isError(errorCode)) return ERROR(corruption_detected);
- FSE_initDState(&(seqState.stateLL), &(seqState.DStream), DTableLL);
- FSE_initDState(&(seqState.stateOffb), &(seqState.DStream), DTableOffb);
- FSE_initDState(&(seqState.stateML), &(seqState.DStream), DTableML);
-
- for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && nbSeq ; )
- {
- size_t oneSeqSize;
- nbSeq--;
- ZSTD_decodeSequence(&sequence, &seqState);
+ }
+ return sequenceLength;
+}
+
+
+static size_t ZSTD_decompressSequences(
+ ZSTD_DCtx* dctx,
+ void* dst, size_t maxDstSize,
+ const void* seqStart, size_t seqSize)
+{
+ const BYTE* ip = (const BYTE*)seqStart;
+ const BYTE* const iend = ip + seqSize;
+ BYTE* const ostart = (BYTE* const)dst;
+ BYTE* op = ostart;
+ BYTE* const oend = ostart + maxDstSize;
+ size_t errorCode, dumpsLength;
+ const BYTE* litPtr = dctx->litPtr;
+ const BYTE* const litEnd = litPtr + dctx->litSize;
+ int nbSeq;
+ const BYTE* dumps;
+ U32* DTableLL = dctx->LLTable;
+ U32* DTableML = dctx->MLTable;
+ U32* DTableOffb = dctx->OffTable;
+ const BYTE* const base = (const BYTE*) (dctx->base);
+ const BYTE* const vBase = (const BYTE*) (dctx->vBase);
+ const BYTE* const dictEnd = (const BYTE*) (dctx->dictEnd);
+
+ /* Build Decoding Tables */
+ errorCode = ZSTD_decodeSeqHeaders(&nbSeq, &dumps, &dumpsLength,
+ DTableLL, DTableML, DTableOffb,
+ ip, iend-ip);
+ if (ZSTD_isError(errorCode)) return errorCode;
+ ip += errorCode;
+
+ /* Regen sequences */
+ {
+ seq_t sequence;
+ seqState_t seqState;
+
+ memset(&sequence, 0, sizeof(sequence));
+ sequence.offset = 4;
+ seqState.dumps = dumps;
+ seqState.dumpsEnd = dumps + dumpsLength;
+ seqState.prevOffset = 4;
+ errorCode = BIT_initDStream(&(seqState.DStream), ip, iend-ip);
+ if (ERR_isError(errorCode)) return ERROR(corruption_detected);
+ FSE_initDState(&(seqState.stateLL), &(seqState.DStream), DTableLL);
+ FSE_initDState(&(seqState.stateOffb), &(seqState.DStream), DTableOffb);
+ FSE_initDState(&(seqState.stateML), &(seqState.DStream), DTableML);
+
+ for ( ; (BIT_reloadDStream(&(seqState.DStream)) <= BIT_DStream_completed) && nbSeq ; )
+ {
+ size_t oneSeqSize;
+ nbSeq--;
+ ZSTD_decodeSequence(&sequence, &seqState);
oneSeqSize = ZSTD_execSequence(op, oend, sequence, &litPtr, litEnd, base, vBase, dictEnd);
- if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
- op += oneSeqSize;
- }
-
- /* check if reached exact end */
- if ( !BIT_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected); /* DStream should be entirely and exactly consumed; otherwise data is corrupted */
-
- /* last literal segment */
- {
- size_t lastLLSize = litEnd - litPtr;
- if (litPtr > litEnd) return ERROR(corruption_detected);
- if (op+lastLLSize > oend) return ERROR(dstSize_tooSmall);
+ if (ZSTD_isError(oneSeqSize)) return oneSeqSize;
+ op += oneSeqSize;
+ }
+
+ /* check if reached exact end */
+ if ( !BIT_endOfDStream(&(seqState.DStream)) ) return ERROR(corruption_detected); /* DStream should be entirely and exactly consumed; otherwise data is corrupted */
+
+ /* last literal segment */
+ {
+ size_t lastLLSize = litEnd - litPtr;
+ if (litPtr > litEnd) return ERROR(corruption_detected);
+ if (op+lastLLSize > oend) return ERROR(dstSize_tooSmall);
if (lastLLSize > 0) {
if (op != litPtr) memcpy(op, litPtr, lastLLSize);
op += lastLLSize;
}
- }
- }
-
- return op-ostart;
-}
-
-
-static void ZSTD_checkContinuity(ZSTD_DCtx* dctx, const void* dst)
-{
- if (dst != dctx->previousDstEnd) /* not contiguous */
- {
- dctx->dictEnd = dctx->previousDstEnd;
- dctx->vBase = (const char*)dst - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base));
- dctx->base = dst;
- dctx->previousDstEnd = dst;
- }
-}
-
-
-static size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
- void* dst, size_t maxDstSize,
- const void* src, size_t srcSize)
-{
- /* blockType == blockCompressed */
- const BYTE* ip = (const BYTE*)src;
+ }
+ }
+
+ return op-ostart;
+}
+
+
+static void ZSTD_checkContinuity(ZSTD_DCtx* dctx, const void* dst)
+{
+ if (dst != dctx->previousDstEnd) /* not contiguous */
+ {
+ dctx->dictEnd = dctx->previousDstEnd;
+ dctx->vBase = (const char*)dst - ((const char*)(dctx->previousDstEnd) - (const char*)(dctx->base));
+ dctx->base = dst;
+ dctx->previousDstEnd = dst;
+ }
+}
+
+
+static size_t ZSTD_decompressBlock_internal(ZSTD_DCtx* dctx,
+ void* dst, size_t maxDstSize,
+ const void* src, size_t srcSize)
+{
+ /* blockType == blockCompressed */
+ const BYTE* ip = (const BYTE*)src;
size_t litCSize;
-
+
if (srcSize > BLOCKSIZE) return ERROR(corruption_detected);
- /* Decode literals sub-block */
+ /* Decode literals sub-block */
litCSize = ZSTD_decodeLiteralsBlock(dctx, src, srcSize);
- if (ZSTD_isError(litCSize)) return litCSize;
- ip += litCSize;
- srcSize -= litCSize;
-
- return ZSTD_decompressSequences(dctx, dst, maxDstSize, ip, srcSize);
-}
-
-
-static size_t ZSTD_decompress_usingDict(ZSTD_DCtx* ctx,
- void* dst, size_t maxDstSize,
- const void* src, size_t srcSize,
- const void* dict, size_t dictSize)
-{
- const BYTE* ip = (const BYTE*)src;
- const BYTE* iend = ip + srcSize;
- BYTE* const ostart = (BYTE* const)dst;
- BYTE* op = ostart;
- BYTE* const oend = ostart + maxDstSize;
- size_t remainingSize = srcSize;
- blockProperties_t blockProperties;
-
- /* init */
- ZSTD_resetDCtx(ctx);
- if (dict)
- {
- ZSTD_decompress_insertDictionary(ctx, dict, dictSize);
- ctx->dictEnd = ctx->previousDstEnd;
- ctx->vBase = (const char*)dst - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
- ctx->base = dst;
- }
- else
- {
- ctx->vBase = ctx->base = ctx->dictEnd = dst;
- }
-
- /* Frame Header */
- {
- size_t frameHeaderSize;
- if (srcSize < ZSTD_frameHeaderSize_min+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
- frameHeaderSize = ZSTD_decodeFrameHeader_Part1(ctx, src, ZSTD_frameHeaderSize_min);
- if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize;
- if (srcSize < frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
- ip += frameHeaderSize; remainingSize -= frameHeaderSize;
- frameHeaderSize = ZSTD_decodeFrameHeader_Part2(ctx, src, frameHeaderSize);
- if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize;
- }
-
- /* Loop on each block */
- while (1)
- {
- size_t decodedSize=0;
- size_t cBlockSize = ZSTD_getcBlockSize(ip, iend-ip, &blockProperties);
- if (ZSTD_isError(cBlockSize)) return cBlockSize;
-
- ip += ZSTD_blockHeaderSize;
- remainingSize -= ZSTD_blockHeaderSize;
- if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
-
- switch(blockProperties.blockType)
- {
- case bt_compressed:
- decodedSize = ZSTD_decompressBlock_internal(ctx, op, oend-op, ip, cBlockSize);
- break;
- case bt_raw :
- decodedSize = ZSTD_copyRawBlock(op, oend-op, ip, cBlockSize);
- break;
- case bt_rle :
- return ERROR(GENERIC); /* not yet supported */
- break;
- case bt_end :
- /* end of frame */
- if (remainingSize) return ERROR(srcSize_wrong);
- break;
- default:
- return ERROR(GENERIC); /* impossible */
- }
- if (cBlockSize == 0) break; /* bt_end */
-
- if (ZSTD_isError(decodedSize)) return decodedSize;
- op += decodedSize;
- ip += cBlockSize;
- remainingSize -= cBlockSize;
- }
-
- return op-ostart;
-}
-
+ if (ZSTD_isError(litCSize)) return litCSize;
+ ip += litCSize;
+ srcSize -= litCSize;
+
+ return ZSTD_decompressSequences(dctx, dst, maxDstSize, ip, srcSize);
+}
+
+
+static size_t ZSTD_decompress_usingDict(ZSTD_DCtx* ctx,
+ void* dst, size_t maxDstSize,
+ const void* src, size_t srcSize,
+ const void* dict, size_t dictSize)
+{
+ const BYTE* ip = (const BYTE*)src;
+ const BYTE* iend = ip + srcSize;
+ BYTE* const ostart = (BYTE* const)dst;
+ BYTE* op = ostart;
+ BYTE* const oend = ostart + maxDstSize;
+ size_t remainingSize = srcSize;
+ blockProperties_t blockProperties;
+
+ /* init */
+ ZSTD_resetDCtx(ctx);
+ if (dict)
+ {
+ ZSTD_decompress_insertDictionary(ctx, dict, dictSize);
+ ctx->dictEnd = ctx->previousDstEnd;
+ ctx->vBase = (const char*)dst - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
+ ctx->base = dst;
+ }
+ else
+ {
+ ctx->vBase = ctx->base = ctx->dictEnd = dst;
+ }
+
+ /* Frame Header */
+ {
+ size_t frameHeaderSize;
+ if (srcSize < ZSTD_frameHeaderSize_min+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
+ frameHeaderSize = ZSTD_decodeFrameHeader_Part1(ctx, src, ZSTD_frameHeaderSize_min);
+ if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize;
+ if (srcSize < frameHeaderSize+ZSTD_blockHeaderSize) return ERROR(srcSize_wrong);
+ ip += frameHeaderSize; remainingSize -= frameHeaderSize;
+ frameHeaderSize = ZSTD_decodeFrameHeader_Part2(ctx, src, frameHeaderSize);
+ if (ZSTD_isError(frameHeaderSize)) return frameHeaderSize;
+ }
+
+ /* Loop on each block */
+ while (1)
+ {
+ size_t decodedSize=0;
+ size_t cBlockSize = ZSTD_getcBlockSize(ip, iend-ip, &blockProperties);
+ if (ZSTD_isError(cBlockSize)) return cBlockSize;
+
+ ip += ZSTD_blockHeaderSize;
+ remainingSize -= ZSTD_blockHeaderSize;
+ if (cBlockSize > remainingSize) return ERROR(srcSize_wrong);
+
+ switch(blockProperties.blockType)
+ {
+ case bt_compressed:
+ decodedSize = ZSTD_decompressBlock_internal(ctx, op, oend-op, ip, cBlockSize);
+ break;
+ case bt_raw :
+ decodedSize = ZSTD_copyRawBlock(op, oend-op, ip, cBlockSize);
+ break;
+ case bt_rle :
+ return ERROR(GENERIC); /* not yet supported */
+ break;
+ case bt_end :
+ /* end of frame */
+ if (remainingSize) return ERROR(srcSize_wrong);
+ break;
+ default:
+ return ERROR(GENERIC); /* impossible */
+ }
+ if (cBlockSize == 0) break; /* bt_end */
+
+ if (ZSTD_isError(decodedSize)) return decodedSize;
+ op += decodedSize;
+ ip += cBlockSize;
+ remainingSize -= cBlockSize;
+ }
+
+ return op-ostart;
+}
+
/* ZSTD_errorFrameSizeInfoLegacy() :
assumes `cSize` and `dBound` are _not_ NULL */
static void ZSTD_errorFrameSizeInfoLegacy(size_t* cSize, unsigned long long* dBound, size_t ret)
@@ -3146,7 +3146,7 @@ void ZSTDv04_findFrameSizeInfoLegacy(const void *src, size_t srcSize, size_t* cS
size_t remainingSize = srcSize;
size_t nbBlocks = 0;
blockProperties_t blockProperties;
-
+
/* Frame Header */
if (srcSize < ZSTD_frameHeaderSize_min) {
ZSTD_errorFrameSizeInfoLegacy(cSize, dBound, ERROR(srcSize_wrong));
@@ -3185,463 +3185,463 @@ void ZSTDv04_findFrameSizeInfoLegacy(const void *src, size_t srcSize, size_t* cS
*dBound = nbBlocks * BLOCKSIZE;
}
-/* ******************************
-* Streaming Decompression API
-********************************/
-static size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx)
-{
- return dctx->expected;
-}
-
-static size_t ZSTD_decompressContinue(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
- /* Sanity check */
- if (srcSize != ctx->expected) return ERROR(srcSize_wrong);
- ZSTD_checkContinuity(ctx, dst);
-
- /* Decompress : frame header; part 1 */
- switch (ctx->stage)
- {
- case ZSTDds_getFrameHeaderSize :
- /* get frame header size */
- if (srcSize != ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong); /* impossible */
- ctx->headerSize = ZSTD_decodeFrameHeader_Part1(ctx, src, ZSTD_frameHeaderSize_min);
- if (ZSTD_isError(ctx->headerSize)) return ctx->headerSize;
- memcpy(ctx->headerBuffer, src, ZSTD_frameHeaderSize_min);
- if (ctx->headerSize > ZSTD_frameHeaderSize_min) return ERROR(GENERIC); /* impossible */
- ctx->expected = 0; /* not necessary to copy more */
- /* fallthrough */
- case ZSTDds_decodeFrameHeader:
- /* get frame header */
- { size_t const result = ZSTD_decodeFrameHeader_Part2(ctx, ctx->headerBuffer, ctx->headerSize);
- if (ZSTD_isError(result)) return result;
- ctx->expected = ZSTD_blockHeaderSize;
- ctx->stage = ZSTDds_decodeBlockHeader;
- return 0;
- }
- case ZSTDds_decodeBlockHeader:
- /* Decode block header */
- { blockProperties_t bp;
- size_t const blockSize = ZSTD_getcBlockSize(src, ZSTD_blockHeaderSize, &bp);
- if (ZSTD_isError(blockSize)) return blockSize;
- if (bp.blockType == bt_end)
- {
- ctx->expected = 0;
- ctx->stage = ZSTDds_getFrameHeaderSize;
- }
- else
- {
- ctx->expected = blockSize;
- ctx->bType = bp.blockType;
- ctx->stage = ZSTDds_decompressBlock;
- }
- return 0;
- }
- case ZSTDds_decompressBlock:
- {
- /* Decompress : block content */
- size_t rSize;
- switch(ctx->bType)
- {
- case bt_compressed:
- rSize = ZSTD_decompressBlock_internal(ctx, dst, maxDstSize, src, srcSize);
- break;
- case bt_raw :
- rSize = ZSTD_copyRawBlock(dst, maxDstSize, src, srcSize);
- break;
- case bt_rle :
- return ERROR(GENERIC); /* not yet handled */
- break;
- case bt_end : /* should never happen (filtered at phase 1) */
- rSize = 0;
- break;
- default:
- return ERROR(GENERIC);
- }
- ctx->stage = ZSTDds_decodeBlockHeader;
- ctx->expected = ZSTD_blockHeaderSize;
- ctx->previousDstEnd = (char*)dst + rSize;
- return rSize;
- }
- default:
- return ERROR(GENERIC); /* impossible */
- }
-}
-
-
-static void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* dict, size_t dictSize)
-{
- ctx->dictEnd = ctx->previousDstEnd;
- ctx->vBase = (const char*)dict - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
- ctx->base = dict;
- ctx->previousDstEnd = (const char*)dict + dictSize;
-}
-
-
-
-/*
- Buffered version of Zstd compression library
- Copyright (C) 2015, Yann Collet.
-
- BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following disclaimer
- in the documentation and/or other materials provided with the
- distribution.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
- You can contact the author at :
- - zstd source repository : https://github.com/Cyan4973/zstd
- - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
-*/
-
-/* The objects defined into this file should be considered experimental.
- * They are not labelled stable, as their prototype may change in the future.
- * You can use them for tests, provide feedback, or if you can endure risk of future changes.
- */
-
-/* *************************************
-* Includes
-***************************************/
-#include <stdlib.h>
-
-
-/** ************************************************
-* Streaming decompression
-*
-* A ZBUFF_DCtx object is required to track streaming operation.
-* Use ZBUFF_createDCtx() and ZBUFF_freeDCtx() to create/release resources.
-* Use ZBUFF_decompressInit() to start a new decompression operation.
-* ZBUFF_DCtx objects can be reused multiple times.
-*
-* Use ZBUFF_decompressContinue() repetitively to consume your input.
-* *srcSizePtr and *maxDstSizePtr can be any size.
-* The function will report how many bytes were read or written by modifying *srcSizePtr and *maxDstSizePtr.
-* Note that it may not consume the entire input, in which case it's up to the caller to call again the function with remaining input.
-* The content of dst will be overwritten (up to *maxDstSizePtr) at each function call, so save its content if it matters or change dst .
+/* ******************************
+* Streaming Decompression API
+********************************/
+static size_t ZSTD_nextSrcSizeToDecompress(ZSTD_DCtx* dctx)
+{
+ return dctx->expected;
+}
+
+static size_t ZSTD_decompressContinue(ZSTD_DCtx* ctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+{
+ /* Sanity check */
+ if (srcSize != ctx->expected) return ERROR(srcSize_wrong);
+ ZSTD_checkContinuity(ctx, dst);
+
+ /* Decompress : frame header; part 1 */
+ switch (ctx->stage)
+ {
+ case ZSTDds_getFrameHeaderSize :
+ /* get frame header size */
+ if (srcSize != ZSTD_frameHeaderSize_min) return ERROR(srcSize_wrong); /* impossible */
+ ctx->headerSize = ZSTD_decodeFrameHeader_Part1(ctx, src, ZSTD_frameHeaderSize_min);
+ if (ZSTD_isError(ctx->headerSize)) return ctx->headerSize;
+ memcpy(ctx->headerBuffer, src, ZSTD_frameHeaderSize_min);
+ if (ctx->headerSize > ZSTD_frameHeaderSize_min) return ERROR(GENERIC); /* impossible */
+ ctx->expected = 0; /* not necessary to copy more */
+ /* fallthrough */
+ case ZSTDds_decodeFrameHeader:
+ /* get frame header */
+ { size_t const result = ZSTD_decodeFrameHeader_Part2(ctx, ctx->headerBuffer, ctx->headerSize);
+ if (ZSTD_isError(result)) return result;
+ ctx->expected = ZSTD_blockHeaderSize;
+ ctx->stage = ZSTDds_decodeBlockHeader;
+ return 0;
+ }
+ case ZSTDds_decodeBlockHeader:
+ /* Decode block header */
+ { blockProperties_t bp;
+ size_t const blockSize = ZSTD_getcBlockSize(src, ZSTD_blockHeaderSize, &bp);
+ if (ZSTD_isError(blockSize)) return blockSize;
+ if (bp.blockType == bt_end)
+ {
+ ctx->expected = 0;
+ ctx->stage = ZSTDds_getFrameHeaderSize;
+ }
+ else
+ {
+ ctx->expected = blockSize;
+ ctx->bType = bp.blockType;
+ ctx->stage = ZSTDds_decompressBlock;
+ }
+ return 0;
+ }
+ case ZSTDds_decompressBlock:
+ {
+ /* Decompress : block content */
+ size_t rSize;
+ switch(ctx->bType)
+ {
+ case bt_compressed:
+ rSize = ZSTD_decompressBlock_internal(ctx, dst, maxDstSize, src, srcSize);
+ break;
+ case bt_raw :
+ rSize = ZSTD_copyRawBlock(dst, maxDstSize, src, srcSize);
+ break;
+ case bt_rle :
+ return ERROR(GENERIC); /* not yet handled */
+ break;
+ case bt_end : /* should never happen (filtered at phase 1) */
+ rSize = 0;
+ break;
+ default:
+ return ERROR(GENERIC);
+ }
+ ctx->stage = ZSTDds_decodeBlockHeader;
+ ctx->expected = ZSTD_blockHeaderSize;
+ ctx->previousDstEnd = (char*)dst + rSize;
+ return rSize;
+ }
+ default:
+ return ERROR(GENERIC); /* impossible */
+ }
+}
+
+
+static void ZSTD_decompress_insertDictionary(ZSTD_DCtx* ctx, const void* dict, size_t dictSize)
+{
+ ctx->dictEnd = ctx->previousDstEnd;
+ ctx->vBase = (const char*)dict - ((const char*)(ctx->previousDstEnd) - (const char*)(ctx->base));
+ ctx->base = dict;
+ ctx->previousDstEnd = (const char*)dict + dictSize;
+}
+
+
+
+/*
+ Buffered version of Zstd compression library
+ Copyright (C) 2015, Yann Collet.
+
+ BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are
+ met:
+ * Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following disclaimer
+ in the documentation and/or other materials provided with the
+ distribution.
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ You can contact the author at :
+ - zstd source repository : https://github.com/Cyan4973/zstd
+ - ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
+*/
+
+/* The objects defined into this file should be considered experimental.
+ * They are not labelled stable, as their prototype may change in the future.
+ * You can use them for tests, provide feedback, or if you can endure risk of future changes.
+ */
+
+/* *************************************
+* Includes
+***************************************/
+#include <stdlib.h>
+
+
+/** ************************************************
+* Streaming decompression
+*
+* A ZBUFF_DCtx object is required to track streaming operation.
+* Use ZBUFF_createDCtx() and ZBUFF_freeDCtx() to create/release resources.
+* Use ZBUFF_decompressInit() to start a new decompression operation.
+* ZBUFF_DCtx objects can be reused multiple times.
+*
+* Use ZBUFF_decompressContinue() repetitively to consume your input.
+* *srcSizePtr and *maxDstSizePtr can be any size.
+* The function will report how many bytes were read or written by modifying *srcSizePtr and *maxDstSizePtr.
+* Note that it may not consume the entire input, in which case it's up to the caller to call again the function with remaining input.
+* The content of dst will be overwritten (up to *maxDstSizePtr) at each function call, so save its content if it matters or change dst .
* return : a hint to preferred nb of bytes to use as input for next function call (it's only a hint, to improve latency)
-* or 0 when a frame is completely decoded
-* or an error code, which can be tested using ZBUFF_isError().
-*
-* Hint : recommended buffer sizes (not compulsory)
-* output : 128 KB block size is the internal unit, it ensures it's always possible to write a full block when it's decoded.
-* input : just follow indications from ZBUFF_decompressContinue() to minimize latency. It should always be <= 128 KB + 3 .
-* **************************************************/
-
-typedef enum { ZBUFFds_init, ZBUFFds_readHeader, ZBUFFds_loadHeader, ZBUFFds_decodeHeader,
- ZBUFFds_read, ZBUFFds_load, ZBUFFds_flush } ZBUFF_dStage;
-
-/* *** Resource management *** */
-
-#define ZSTD_frameHeaderSize_max 5 /* too magical, should come from reference */
-struct ZBUFFv04_DCtx_s {
- ZSTD_DCtx* zc;
- ZSTD_parameters params;
- char* inBuff;
- size_t inBuffSize;
- size_t inPos;
- char* outBuff;
- size_t outBuffSize;
- size_t outStart;
- size_t outEnd;
- size_t hPos;
- const char* dict;
- size_t dictSize;
- ZBUFF_dStage stage;
- unsigned char headerBuffer[ZSTD_frameHeaderSize_max];
-}; /* typedef'd to ZBUFF_DCtx within "zstd_buffered.h" */
-
-typedef ZBUFFv04_DCtx ZBUFF_DCtx;
-
-
-static ZBUFF_DCtx* ZBUFF_createDCtx(void)
-{
- ZBUFF_DCtx* zbc = (ZBUFF_DCtx*)malloc(sizeof(ZBUFF_DCtx));
- if (zbc==NULL) return NULL;
- memset(zbc, 0, sizeof(*zbc));
- zbc->zc = ZSTD_createDCtx();
- zbc->stage = ZBUFFds_init;
- return zbc;
-}
-
-static size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbc)
-{
- if (zbc==NULL) return 0; /* support free on null */
- ZSTD_freeDCtx(zbc->zc);
- free(zbc->inBuff);
- free(zbc->outBuff);
- free(zbc);
- return 0;
-}
-
-
-/* *** Initialization *** */
-
-static size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbc)
-{
- zbc->stage = ZBUFFds_readHeader;
- zbc->hPos = zbc->inPos = zbc->outStart = zbc->outEnd = zbc->dictSize = 0;
- return ZSTD_resetDCtx(zbc->zc);
-}
-
-
-static size_t ZBUFF_decompressWithDictionary(ZBUFF_DCtx* zbc, const void* src, size_t srcSize)
-{
- zbc->dict = (const char*)src;
- zbc->dictSize = srcSize;
- return 0;
-}
-
-static size_t ZBUFF_limitCopy(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
- size_t length = MIN(maxDstSize, srcSize);
+* or 0 when a frame is completely decoded
+* or an error code, which can be tested using ZBUFF_isError().
+*
+* Hint : recommended buffer sizes (not compulsory)
+* output : 128 KB block size is the internal unit, it ensures it's always possible to write a full block when it's decoded.
+* input : just follow indications from ZBUFF_decompressContinue() to minimize latency. It should always be <= 128 KB + 3 .
+* **************************************************/
+
+typedef enum { ZBUFFds_init, ZBUFFds_readHeader, ZBUFFds_loadHeader, ZBUFFds_decodeHeader,
+ ZBUFFds_read, ZBUFFds_load, ZBUFFds_flush } ZBUFF_dStage;
+
+/* *** Resource management *** */
+
+#define ZSTD_frameHeaderSize_max 5 /* too magical, should come from reference */
+struct ZBUFFv04_DCtx_s {
+ ZSTD_DCtx* zc;
+ ZSTD_parameters params;
+ char* inBuff;
+ size_t inBuffSize;
+ size_t inPos;
+ char* outBuff;
+ size_t outBuffSize;
+ size_t outStart;
+ size_t outEnd;
+ size_t hPos;
+ const char* dict;
+ size_t dictSize;
+ ZBUFF_dStage stage;
+ unsigned char headerBuffer[ZSTD_frameHeaderSize_max];
+}; /* typedef'd to ZBUFF_DCtx within "zstd_buffered.h" */
+
+typedef ZBUFFv04_DCtx ZBUFF_DCtx;
+
+
+static ZBUFF_DCtx* ZBUFF_createDCtx(void)
+{
+ ZBUFF_DCtx* zbc = (ZBUFF_DCtx*)malloc(sizeof(ZBUFF_DCtx));
+ if (zbc==NULL) return NULL;
+ memset(zbc, 0, sizeof(*zbc));
+ zbc->zc = ZSTD_createDCtx();
+ zbc->stage = ZBUFFds_init;
+ return zbc;
+}
+
+static size_t ZBUFF_freeDCtx(ZBUFF_DCtx* zbc)
+{
+ if (zbc==NULL) return 0; /* support free on null */
+ ZSTD_freeDCtx(zbc->zc);
+ free(zbc->inBuff);
+ free(zbc->outBuff);
+ free(zbc);
+ return 0;
+}
+
+
+/* *** Initialization *** */
+
+static size_t ZBUFF_decompressInit(ZBUFF_DCtx* zbc)
+{
+ zbc->stage = ZBUFFds_readHeader;
+ zbc->hPos = zbc->inPos = zbc->outStart = zbc->outEnd = zbc->dictSize = 0;
+ return ZSTD_resetDCtx(zbc->zc);
+}
+
+
+static size_t ZBUFF_decompressWithDictionary(ZBUFF_DCtx* zbc, const void* src, size_t srcSize)
+{
+ zbc->dict = (const char*)src;
+ zbc->dictSize = srcSize;
+ return 0;
+}
+
+static size_t ZBUFF_limitCopy(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+{
+ size_t length = MIN(maxDstSize, srcSize);
if (length > 0) {
memcpy(dst, src, length);
}
- return length;
-}
-
-/* *** Decompression *** */
-
-static size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbc, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr)
-{
- const char* const istart = (const char*)src;
- const char* ip = istart;
- const char* const iend = istart + *srcSizePtr;
- char* const ostart = (char*)dst;
- char* op = ostart;
- char* const oend = ostart + *maxDstSizePtr;
- U32 notDone = 1;
-
+ return length;
+}
+
+/* *** Decompression *** */
+
+static size_t ZBUFF_decompressContinue(ZBUFF_DCtx* zbc, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr)
+{
+ const char* const istart = (const char*)src;
+ const char* ip = istart;
+ const char* const iend = istart + *srcSizePtr;
+ char* const ostart = (char*)dst;
+ char* op = ostart;
+ char* const oend = ostart + *maxDstSizePtr;
+ U32 notDone = 1;
+
DEBUGLOG(5, "ZBUFF_decompressContinue");
- while (notDone)
- {
- switch(zbc->stage)
- {
-
- case ZBUFFds_init :
+ while (notDone)
+ {
+ switch(zbc->stage)
+ {
+
+ case ZBUFFds_init :
DEBUGLOG(5, "ZBUFF_decompressContinue: stage==ZBUFFds_init => ERROR(init_missing)");
- return ERROR(init_missing);
-
- case ZBUFFds_readHeader :
- /* read header from src */
- { size_t const headerSize = ZSTD_getFrameParams(&(zbc->params), src, *srcSizePtr);
- if (ZSTD_isError(headerSize)) return headerSize;
- if (headerSize) {
- /* not enough input to decode header : tell how many bytes would be necessary */
- memcpy(zbc->headerBuffer+zbc->hPos, src, *srcSizePtr);
- zbc->hPos += *srcSizePtr;
- *maxDstSizePtr = 0;
- zbc->stage = ZBUFFds_loadHeader;
- return headerSize - zbc->hPos;
- }
- zbc->stage = ZBUFFds_decodeHeader;
- break;
- }
-
- case ZBUFFds_loadHeader:
- /* complete header from src */
- { size_t headerSize = ZBUFF_limitCopy(
- zbc->headerBuffer + zbc->hPos, ZSTD_frameHeaderSize_max - zbc->hPos,
- src, *srcSizePtr);
- zbc->hPos += headerSize;
- ip += headerSize;
- headerSize = ZSTD_getFrameParams(&(zbc->params), zbc->headerBuffer, zbc->hPos);
- if (ZSTD_isError(headerSize)) return headerSize;
- if (headerSize) {
- /* not enough input to decode header : tell how many bytes would be necessary */
- *maxDstSizePtr = 0;
- return headerSize - zbc->hPos;
- } }
- /* intentional fallthrough */
-
- case ZBUFFds_decodeHeader:
- /* apply header to create / resize buffers */
- { size_t const neededOutSize = (size_t)1 << zbc->params.windowLog;
- size_t const neededInSize = BLOCKSIZE; /* a block is never > BLOCKSIZE */
- if (zbc->inBuffSize < neededInSize) {
- free(zbc->inBuff);
- zbc->inBuffSize = neededInSize;
- zbc->inBuff = (char*)malloc(neededInSize);
- if (zbc->inBuff == NULL) return ERROR(memory_allocation);
- }
- if (zbc->outBuffSize < neededOutSize) {
- free(zbc->outBuff);
- zbc->outBuffSize = neededOutSize;
- zbc->outBuff = (char*)malloc(neededOutSize);
- if (zbc->outBuff == NULL) return ERROR(memory_allocation);
- } }
- if (zbc->dictSize)
- ZSTD_decompress_insertDictionary(zbc->zc, zbc->dict, zbc->dictSize);
- if (zbc->hPos) {
- /* some data already loaded into headerBuffer : transfer into inBuff */
- memcpy(zbc->inBuff, zbc->headerBuffer, zbc->hPos);
- zbc->inPos = zbc->hPos;
- zbc->hPos = 0;
- zbc->stage = ZBUFFds_load;
- break;
- }
- zbc->stage = ZBUFFds_read;
+ return ERROR(init_missing);
+
+ case ZBUFFds_readHeader :
+ /* read header from src */
+ { size_t const headerSize = ZSTD_getFrameParams(&(zbc->params), src, *srcSizePtr);
+ if (ZSTD_isError(headerSize)) return headerSize;
+ if (headerSize) {
+ /* not enough input to decode header : tell how many bytes would be necessary */
+ memcpy(zbc->headerBuffer+zbc->hPos, src, *srcSizePtr);
+ zbc->hPos += *srcSizePtr;
+ *maxDstSizePtr = 0;
+ zbc->stage = ZBUFFds_loadHeader;
+ return headerSize - zbc->hPos;
+ }
+ zbc->stage = ZBUFFds_decodeHeader;
+ break;
+ }
+
+ case ZBUFFds_loadHeader:
+ /* complete header from src */
+ { size_t headerSize = ZBUFF_limitCopy(
+ zbc->headerBuffer + zbc->hPos, ZSTD_frameHeaderSize_max - zbc->hPos,
+ src, *srcSizePtr);
+ zbc->hPos += headerSize;
+ ip += headerSize;
+ headerSize = ZSTD_getFrameParams(&(zbc->params), zbc->headerBuffer, zbc->hPos);
+ if (ZSTD_isError(headerSize)) return headerSize;
+ if (headerSize) {
+ /* not enough input to decode header : tell how many bytes would be necessary */
+ *maxDstSizePtr = 0;
+ return headerSize - zbc->hPos;
+ } }
+ /* intentional fallthrough */
+
+ case ZBUFFds_decodeHeader:
+ /* apply header to create / resize buffers */
+ { size_t const neededOutSize = (size_t)1 << zbc->params.windowLog;
+ size_t const neededInSize = BLOCKSIZE; /* a block is never > BLOCKSIZE */
+ if (zbc->inBuffSize < neededInSize) {
+ free(zbc->inBuff);
+ zbc->inBuffSize = neededInSize;
+ zbc->inBuff = (char*)malloc(neededInSize);
+ if (zbc->inBuff == NULL) return ERROR(memory_allocation);
+ }
+ if (zbc->outBuffSize < neededOutSize) {
+ free(zbc->outBuff);
+ zbc->outBuffSize = neededOutSize;
+ zbc->outBuff = (char*)malloc(neededOutSize);
+ if (zbc->outBuff == NULL) return ERROR(memory_allocation);
+ } }
+ if (zbc->dictSize)
+ ZSTD_decompress_insertDictionary(zbc->zc, zbc->dict, zbc->dictSize);
+ if (zbc->hPos) {
+ /* some data already loaded into headerBuffer : transfer into inBuff */
+ memcpy(zbc->inBuff, zbc->headerBuffer, zbc->hPos);
+ zbc->inPos = zbc->hPos;
+ zbc->hPos = 0;
+ zbc->stage = ZBUFFds_load;
+ break;
+ }
+ zbc->stage = ZBUFFds_read;
/* fall-through */
- case ZBUFFds_read:
- {
- size_t neededInSize = ZSTD_nextSrcSizeToDecompress(zbc->zc);
- if (neededInSize==0) /* end of frame */
- {
- zbc->stage = ZBUFFds_init;
- notDone = 0;
- break;
- }
- if ((size_t)(iend-ip) >= neededInSize)
- {
- /* directly decode from src */
- size_t decodedSize = ZSTD_decompressContinue(zbc->zc,
- zbc->outBuff + zbc->outStart, zbc->outBuffSize - zbc->outStart,
- ip, neededInSize);
- if (ZSTD_isError(decodedSize)) return decodedSize;
- ip += neededInSize;
- if (!decodedSize) break; /* this was just a header */
- zbc->outEnd = zbc->outStart + decodedSize;
- zbc->stage = ZBUFFds_flush;
- break;
- }
- if (ip==iend) { notDone = 0; break; } /* no more input */
- zbc->stage = ZBUFFds_load;
- }
+ case ZBUFFds_read:
+ {
+ size_t neededInSize = ZSTD_nextSrcSizeToDecompress(zbc->zc);
+ if (neededInSize==0) /* end of frame */
+ {
+ zbc->stage = ZBUFFds_init;
+ notDone = 0;
+ break;
+ }
+ if ((size_t)(iend-ip) >= neededInSize)
+ {
+ /* directly decode from src */
+ size_t decodedSize = ZSTD_decompressContinue(zbc->zc,
+ zbc->outBuff + zbc->outStart, zbc->outBuffSize - zbc->outStart,
+ ip, neededInSize);
+ if (ZSTD_isError(decodedSize)) return decodedSize;
+ ip += neededInSize;
+ if (!decodedSize) break; /* this was just a header */
+ zbc->outEnd = zbc->outStart + decodedSize;
+ zbc->stage = ZBUFFds_flush;
+ break;
+ }
+ if (ip==iend) { notDone = 0; break; } /* no more input */
+ zbc->stage = ZBUFFds_load;
+ }
/* fall-through */
- case ZBUFFds_load:
- {
- size_t neededInSize = ZSTD_nextSrcSizeToDecompress(zbc->zc);
- size_t toLoad = neededInSize - zbc->inPos; /* should always be <= remaining space within inBuff */
- size_t loadedSize;
- if (toLoad > zbc->inBuffSize - zbc->inPos) return ERROR(corruption_detected); /* should never happen */
- loadedSize = ZBUFF_limitCopy(zbc->inBuff + zbc->inPos, toLoad, ip, iend-ip);
- ip += loadedSize;
- zbc->inPos += loadedSize;
- if (loadedSize < toLoad) { notDone = 0; break; } /* not enough input, wait for more */
- {
- size_t decodedSize = ZSTD_decompressContinue(zbc->zc,
- zbc->outBuff + zbc->outStart, zbc->outBuffSize - zbc->outStart,
- zbc->inBuff, neededInSize);
- if (ZSTD_isError(decodedSize)) return decodedSize;
- zbc->inPos = 0; /* input is consumed */
- if (!decodedSize) { zbc->stage = ZBUFFds_read; break; } /* this was just a header */
- zbc->outEnd = zbc->outStart + decodedSize;
- zbc->stage = ZBUFFds_flush;
+ case ZBUFFds_load:
+ {
+ size_t neededInSize = ZSTD_nextSrcSizeToDecompress(zbc->zc);
+ size_t toLoad = neededInSize - zbc->inPos; /* should always be <= remaining space within inBuff */
+ size_t loadedSize;
+ if (toLoad > zbc->inBuffSize - zbc->inPos) return ERROR(corruption_detected); /* should never happen */
+ loadedSize = ZBUFF_limitCopy(zbc->inBuff + zbc->inPos, toLoad, ip, iend-ip);
+ ip += loadedSize;
+ zbc->inPos += loadedSize;
+ if (loadedSize < toLoad) { notDone = 0; break; } /* not enough input, wait for more */
+ {
+ size_t decodedSize = ZSTD_decompressContinue(zbc->zc,
+ zbc->outBuff + zbc->outStart, zbc->outBuffSize - zbc->outStart,
+ zbc->inBuff, neededInSize);
+ if (ZSTD_isError(decodedSize)) return decodedSize;
+ zbc->inPos = 0; /* input is consumed */
+ if (!decodedSize) { zbc->stage = ZBUFFds_read; break; } /* this was just a header */
+ zbc->outEnd = zbc->outStart + decodedSize;
+ zbc->stage = ZBUFFds_flush;
/* ZBUFFds_flush follows */
- }
- }
+ }
+ }
/* fall-through */
- case ZBUFFds_flush:
- {
- size_t toFlushSize = zbc->outEnd - zbc->outStart;
- size_t flushedSize = ZBUFF_limitCopy(op, oend-op, zbc->outBuff + zbc->outStart, toFlushSize);
- op += flushedSize;
- zbc->outStart += flushedSize;
- if (flushedSize == toFlushSize)
- {
- zbc->stage = ZBUFFds_read;
- if (zbc->outStart + BLOCKSIZE > zbc->outBuffSize)
- zbc->outStart = zbc->outEnd = 0;
- break;
- }
- /* cannot flush everything */
- notDone = 0;
- break;
- }
- default: return ERROR(GENERIC); /* impossible */
- }
- }
-
- *srcSizePtr = ip-istart;
- *maxDstSizePtr = op-ostart;
-
- {
- size_t nextSrcSizeHint = ZSTD_nextSrcSizeToDecompress(zbc->zc);
- if (nextSrcSizeHint > 3) nextSrcSizeHint+= 3; /* get the next block header while at it */
- nextSrcSizeHint -= zbc->inPos; /* already loaded*/
- return nextSrcSizeHint;
- }
-}
-
-
-/* *************************************
-* Tool functions
-***************************************/
-unsigned ZBUFFv04_isError(size_t errorCode) { return ERR_isError(errorCode); }
-const char* ZBUFFv04_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); }
-
-size_t ZBUFFv04_recommendedDInSize() { return BLOCKSIZE + 3; }
-size_t ZBUFFv04_recommendedDOutSize() { return BLOCKSIZE; }
-
-
-
-/*- ========================================================================= -*/
-
-/* final wrapping stage */
-
-size_t ZSTDv04_decompressDCtx(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
- return ZSTD_decompress_usingDict(dctx, dst, maxDstSize, src, srcSize, NULL, 0);
-}
-
-size_t ZSTDv04_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
-#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1)
- size_t regenSize;
- ZSTD_DCtx* dctx = ZSTD_createDCtx();
- if (dctx==NULL) return ERROR(memory_allocation);
- regenSize = ZSTDv04_decompressDCtx(dctx, dst, maxDstSize, src, srcSize);
- ZSTD_freeDCtx(dctx);
- return regenSize;
-#else
- ZSTD_DCtx dctx;
- return ZSTDv04_decompressDCtx(&dctx, dst, maxDstSize, src, srcSize);
-#endif
-}
-
-size_t ZSTDv04_resetDCtx(ZSTDv04_Dctx* dctx) { return ZSTD_resetDCtx(dctx); }
-
-size_t ZSTDv04_nextSrcSizeToDecompress(ZSTDv04_Dctx* dctx)
-{
- return ZSTD_nextSrcSizeToDecompress(dctx);
-}
-
-size_t ZSTDv04_decompressContinue(ZSTDv04_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
-{
- return ZSTD_decompressContinue(dctx, dst, maxDstSize, src, srcSize);
-}
-
-
-
-ZBUFFv04_DCtx* ZBUFFv04_createDCtx(void) { return ZBUFF_createDCtx(); }
+ case ZBUFFds_flush:
+ {
+ size_t toFlushSize = zbc->outEnd - zbc->outStart;
+ size_t flushedSize = ZBUFF_limitCopy(op, oend-op, zbc->outBuff + zbc->outStart, toFlushSize);
+ op += flushedSize;
+ zbc->outStart += flushedSize;
+ if (flushedSize == toFlushSize)
+ {
+ zbc->stage = ZBUFFds_read;
+ if (zbc->outStart + BLOCKSIZE > zbc->outBuffSize)
+ zbc->outStart = zbc->outEnd = 0;
+ break;
+ }
+ /* cannot flush everything */
+ notDone = 0;
+ break;
+ }
+ default: return ERROR(GENERIC); /* impossible */
+ }
+ }
+
+ *srcSizePtr = ip-istart;
+ *maxDstSizePtr = op-ostart;
+
+ {
+ size_t nextSrcSizeHint = ZSTD_nextSrcSizeToDecompress(zbc->zc);
+ if (nextSrcSizeHint > 3) nextSrcSizeHint+= 3; /* get the next block header while at it */
+ nextSrcSizeHint -= zbc->inPos; /* already loaded*/
+ return nextSrcSizeHint;
+ }
+}
+
+
+/* *************************************
+* Tool functions
+***************************************/
+unsigned ZBUFFv04_isError(size_t errorCode) { return ERR_isError(errorCode); }
+const char* ZBUFFv04_getErrorName(size_t errorCode) { return ERR_getErrorName(errorCode); }
+
+size_t ZBUFFv04_recommendedDInSize() { return BLOCKSIZE + 3; }
+size_t ZBUFFv04_recommendedDOutSize() { return BLOCKSIZE; }
+
+
+
+/*- ========================================================================= -*/
+
+/* final wrapping stage */
+
+size_t ZSTDv04_decompressDCtx(ZSTD_DCtx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+{
+ return ZSTD_decompress_usingDict(dctx, dst, maxDstSize, src, srcSize, NULL, 0);
+}
+
+size_t ZSTDv04_decompress(void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+{
+#if defined(ZSTD_HEAPMODE) && (ZSTD_HEAPMODE==1)
+ size_t regenSize;
+ ZSTD_DCtx* dctx = ZSTD_createDCtx();
+ if (dctx==NULL) return ERROR(memory_allocation);
+ regenSize = ZSTDv04_decompressDCtx(dctx, dst, maxDstSize, src, srcSize);
+ ZSTD_freeDCtx(dctx);
+ return regenSize;
+#else
+ ZSTD_DCtx dctx;
+ return ZSTDv04_decompressDCtx(&dctx, dst, maxDstSize, src, srcSize);
+#endif
+}
+
+size_t ZSTDv04_resetDCtx(ZSTDv04_Dctx* dctx) { return ZSTD_resetDCtx(dctx); }
+
+size_t ZSTDv04_nextSrcSizeToDecompress(ZSTDv04_Dctx* dctx)
+{
+ return ZSTD_nextSrcSizeToDecompress(dctx);
+}
+
+size_t ZSTDv04_decompressContinue(ZSTDv04_Dctx* dctx, void* dst, size_t maxDstSize, const void* src, size_t srcSize)
+{
+ return ZSTD_decompressContinue(dctx, dst, maxDstSize, src, srcSize);
+}
+
+
+
+ZBUFFv04_DCtx* ZBUFFv04_createDCtx(void) { return ZBUFF_createDCtx(); }
size_t ZBUFFv04_freeDCtx(ZBUFFv04_DCtx* dctx) { return ZBUFF_freeDCtx(dctx); }
-
-size_t ZBUFFv04_decompressInit(ZBUFFv04_DCtx* dctx) { return ZBUFF_decompressInit(dctx); }
-size_t ZBUFFv04_decompressWithDictionary(ZBUFFv04_DCtx* dctx, const void* src, size_t srcSize)
-{ return ZBUFF_decompressWithDictionary(dctx, src, srcSize); }
-
-size_t ZBUFFv04_decompressContinue(ZBUFFv04_DCtx* dctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr)
-{
+
+size_t ZBUFFv04_decompressInit(ZBUFFv04_DCtx* dctx) { return ZBUFF_decompressInit(dctx); }
+size_t ZBUFFv04_decompressWithDictionary(ZBUFFv04_DCtx* dctx, const void* src, size_t srcSize)
+{ return ZBUFF_decompressWithDictionary(dctx, src, srcSize); }
+
+size_t ZBUFFv04_decompressContinue(ZBUFFv04_DCtx* dctx, void* dst, size_t* maxDstSizePtr, const void* src, size_t* srcSizePtr)
+{
DEBUGLOG(5, "ZBUFFv04_decompressContinue");
- return ZBUFF_decompressContinue(dctx, dst, maxDstSizePtr, src, srcSizePtr);
-}
-
-ZSTD_DCtx* ZSTDv04_createDCtx(void) { return ZSTD_createDCtx(); }
-size_t ZSTDv04_freeDCtx(ZSTD_DCtx* dctx) { return ZSTD_freeDCtx(dctx); }
+ return ZBUFF_decompressContinue(dctx, dst, maxDstSizePtr, src, srcSizePtr);
+}
+
+ZSTD_DCtx* ZSTDv04_createDCtx(void) { return ZSTD_createDCtx(); }
+size_t ZSTDv04_freeDCtx(ZSTD_DCtx* dctx) { return ZSTD_freeDCtx(dctx); }