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// SPDX-License-Identifier: 0BSD
///////////////////////////////////////////////////////////////////////////////
//
/// \file sysdefs.h
/// \brief Common includes, definitions, system-specific things etc.
///
/// This file is used also by the lzma command line tool, that's why this
/// file is separate from common.h.
//
// Author: Lasse Collin
//
///////////////////////////////////////////////////////////////////////////////
#ifndef LZMA_SYSDEFS_H
#define LZMA_SYSDEFS_H
//////////////
// Includes //
//////////////
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
// This #define ensures that C99 and POSIX compliant stdio functions are
// available with MinGW-w64 (both 32-bit and 64-bit). Modern MinGW-w64 adds
// this automatically, for example, when the compiler is in C99 (or later)
// mode when building against msvcrt.dll. It still doesn't hurt to be explicit
// that we always want this and #define this unconditionally.
//
// With Universal CRT (UCRT) this is less important because UCRT contains
// C99-compatible stdio functions. It's still nice to #define this as UCRT
// doesn't support the POSIX thousand separator flag in printf (like "%'u").
#ifdef __MINGW32__
# define __USE_MINGW_ANSI_STDIO 1
#endif
// size_t and NULL
#include <stddef.h>
#ifdef HAVE_INTTYPES_H
# include <inttypes.h>
#endif
// C99 says that inttypes.h always includes stdint.h, but some systems
// don't do that, and require including stdint.h separately.
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif
// Some pre-C99 systems have SIZE_MAX in limits.h instead of stdint.h. The
// limits are also used to figure out some macros missing from pre-C99 systems.
#include <limits.h>
// Be more compatible with systems that have non-conforming inttypes.h.
// We assume that int is 32-bit and that long is either 32-bit or 64-bit.
// Full Autoconf test could be more correct, but this should work well enough.
// Note that this duplicates some code from lzma.h, but this is better since
// we can work without inttypes.h thanks to Autoconf tests.
#ifndef UINT32_C
# if UINT_MAX != 4294967295U
# error UINT32_C is not defined and unsigned int is not 32-bit.
# endif
# define UINT32_C(n) n ## U
#endif
#ifndef UINT32_MAX
# define UINT32_MAX UINT32_C(4294967295)
#endif
#ifndef PRIu32
# define PRIu32 "u"
#endif
#ifndef PRIx32
# define PRIx32 "x"
#endif
#ifndef PRIX32
# define PRIX32 "X"
#endif
#if ULONG_MAX == 4294967295UL
# ifndef UINT64_C
# define UINT64_C(n) n ## ULL
# endif
# ifndef PRIu64
# define PRIu64 "llu"
# endif
# ifndef PRIx64
# define PRIx64 "llx"
# endif
# ifndef PRIX64
# define PRIX64 "llX"
# endif
#else
# ifndef UINT64_C
# define UINT64_C(n) n ## UL
# endif
# ifndef PRIu64
# define PRIu64 "lu"
# endif
# ifndef PRIx64
# define PRIx64 "lx"
# endif
# ifndef PRIX64
# define PRIX64 "lX"
# endif
#endif
#ifndef UINT64_MAX
# define UINT64_MAX UINT64_C(18446744073709551615)
#endif
// Incorrect(?) SIZE_MAX:
// - Interix headers typedef size_t to unsigned long,
// but a few lines later define SIZE_MAX to INT32_MAX.
// - SCO OpenServer (x86) headers typedef size_t to unsigned int
// but define SIZE_MAX to INT32_MAX.
#if defined(__INTERIX) || defined(_SCO_DS)
# undef SIZE_MAX
#endif
// The code currently assumes that size_t is either 32-bit or 64-bit.
#ifndef SIZE_MAX
# if SIZEOF_SIZE_T == 4
# define SIZE_MAX UINT32_MAX
# elif SIZEOF_SIZE_T == 8
# define SIZE_MAX UINT64_MAX
# else
# error size_t is not 32-bit or 64-bit
# endif
#endif
#if SIZE_MAX != UINT32_MAX && SIZE_MAX != UINT64_MAX
# error size_t is not 32-bit or 64-bit
#endif
#include <stdlib.h>
#include <assert.h>
// Pre-C99 systems lack stdbool.h. All the code in XZ Utils must be written
// so that it works with fake bool type, for example:
//
// bool foo = (flags & 0x100) != 0;
// bool bar = !!(flags & 0x100);
//
// This works with the real C99 bool but breaks with fake bool:
//
// bool baz = (flags & 0x100);
//
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# if ! HAVE__BOOL
typedef unsigned char _Bool;
# endif
# define bool _Bool
# define false 0
# define true 1
# define __bool_true_false_are_defined 1
#endif
#include <string.h>
// Visual Studio 2013 update 2 supports only __inline, not inline.
// MSVC v19.0 / VS 2015 and newer support both.
//
// MSVC v19.27 (VS 2019 version 16.7) added support for restrict.
// Older ones support only __restrict.
#ifdef _MSC_VER
# if _MSC_VER < 1900 && !defined(inline)
# define inline __inline
# endif
# if _MSC_VER < 1927 && !defined(restrict)
# define restrict __restrict
# endif
#endif
////////////
// Macros //
////////////
#undef memzero
#define memzero(s, n) memset(s, 0, n)
// NOTE: Avoid using MIN() and MAX(), because even conditionally defining
// those macros can cause some portability trouble, since on some systems
// the system headers insist defining their own versions.
#define my_min(x, y) ((x) < (y) ? (x) : (y))
#define my_max(x, y) ((x) > (y) ? (x) : (y))
#ifndef ARRAY_SIZE
# define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
#endif
#if defined(__GNUC__) \
&& ((__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4)
# define lzma_attr_alloc_size(x) __attribute__((__alloc_size__(x)))
#else
# define lzma_attr_alloc_size(x)
#endif
#endif
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