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authorasaitgalin <asaitgalin@yandex-team.ru>2022-02-10 16:47:28 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:47:28 +0300
commitc0780d05ad256f75dc8e0fa36aee5dbce402e8f6 (patch)
treed810bdcfddba2f591fdf54356f0634da5377967e /contrib/libs/brotli/enc/write_bits.h
parent55a7f90e4cd31e9481cace8ee5dfd682c27e810e (diff)
downloadydb-c0780d05ad256f75dc8e0fa36aee5dbce402e8f6.tar.gz
Restoring authorship annotation for <asaitgalin@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/brotli/enc/write_bits.h')
-rw-r--r--contrib/libs/brotli/enc/write_bits.h92
1 files changed, 46 insertions, 46 deletions
diff --git a/contrib/libs/brotli/enc/write_bits.h b/contrib/libs/brotli/enc/write_bits.h
index 36515a6893..9084272f0a 100644
--- a/contrib/libs/brotli/enc/write_bits.h
+++ b/contrib/libs/brotli/enc/write_bits.h
@@ -1,48 +1,48 @@
-/* Copyright 2010 Google Inc. All Rights Reserved.
-
- Distributed under MIT license.
- See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
-*/
-
-/* Write bits into a byte array. */
+/* Copyright 2010 Google Inc. All Rights Reserved.
+ Distributed under MIT license.
+ See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Write bits into a byte array. */
+
#ifndef BROTLI_ENC_WRITE_BITS_H_
#define BROTLI_ENC_WRITE_BITS_H_
#include "../common/platform.h"
-#include <brotli/types.h>
-
-#if defined(__cplusplus) || defined(c_plusplus)
-extern "C" {
-#endif
-
-/*#define BIT_WRITER_DEBUG */
+#include <brotli/types.h>
-/* This function writes bits into bytes in increasing addresses, and within
- a byte least-significant-bit first.
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
- The function can write up to 56 bits in one go with WriteBits
- Example: let's assume that 3 bits (Rs below) have been written already:
+/*#define BIT_WRITER_DEBUG */
- BYTE-0 BYTE+1 BYTE+2
-
- 0000 0RRR 0000 0000 0000 0000
-
- Now, we could write 5 or less bits in MSB by just sifting by 3
- and OR'ing to BYTE-0.
-
- For n bits, we take the last 5 bits, OR that with high bits in BYTE-0,
- and locate the rest in BYTE+1, BYTE+2, etc. */
-static BROTLI_INLINE void BrotliWriteBits(size_t n_bits,
- uint64_t bits,
+/* This function writes bits into bytes in increasing addresses, and within
+ a byte least-significant-bit first.
+
+ The function can write up to 56 bits in one go with WriteBits
+ Example: let's assume that 3 bits (Rs below) have been written already:
+
+ BYTE-0 BYTE+1 BYTE+2
+
+ 0000 0RRR 0000 0000 0000 0000
+
+ Now, we could write 5 or less bits in MSB by just sifting by 3
+ and OR'ing to BYTE-0.
+
+ For n bits, we take the last 5 bits, OR that with high bits in BYTE-0,
+ and locate the rest in BYTE+1, BYTE+2, etc. */
+static BROTLI_INLINE void BrotliWriteBits(size_t n_bits,
+ uint64_t bits,
size_t* BROTLI_RESTRICT pos,
uint8_t* BROTLI_RESTRICT array) {
#if defined(BROTLI_LITTLE_ENDIAN)
- /* This branch of the code can write up to 56 bits at a time,
- 7 bits are lost by being perhaps already in *p and at least
- 1 bit is needed to initialize the bit-stream ahead (i.e. if 7
- bits are in *p and we write 57 bits, then the next write will
- access a byte that was never initialized). */
+ /* This branch of the code can write up to 56 bits at a time,
+ 7 bits are lost by being perhaps already in *p and at least
+ 1 bit is needed to initialize the bit-stream ahead (i.e. if 7
+ bits are in *p and we write 57 bits, then the next write will
+ access a byte that was never initialized). */
uint8_t* p = &array[*pos >> 3];
uint64_t v = (uint64_t)(*p); /* Zero-extend 8 to 64 bits. */
BROTLI_LOG(("WriteBits %2d 0x%08x%08x %10d\n", (int)n_bits,
@@ -51,35 +51,35 @@ static BROTLI_INLINE void BrotliWriteBits(size_t n_bits,
BROTLI_DCHECK((bits >> n_bits) == 0);
BROTLI_DCHECK(n_bits <= 56);
v |= bits << (*pos & 7);
- BROTLI_UNALIGNED_STORE64LE(p, v); /* Set some bits. */
+ BROTLI_UNALIGNED_STORE64LE(p, v); /* Set some bits. */
*pos += n_bits;
#else
/* implicit & 0xFF is assumed for uint8_t arithmetics */
uint8_t* array_pos = &array[*pos >> 3];
- const size_t bits_reserved_in_first_byte = (*pos & 7);
- size_t bits_left_to_write;
+ const size_t bits_reserved_in_first_byte = (*pos & 7);
+ size_t bits_left_to_write;
bits <<= bits_reserved_in_first_byte;
- *array_pos++ |= (uint8_t)bits;
- for (bits_left_to_write = n_bits + bits_reserved_in_first_byte;
- bits_left_to_write >= 9;
+ *array_pos++ |= (uint8_t)bits;
+ for (bits_left_to_write = n_bits + bits_reserved_in_first_byte;
+ bits_left_to_write >= 9;
bits_left_to_write -= 8) {
bits >>= 8;
- *array_pos++ = (uint8_t)bits;
+ *array_pos++ = (uint8_t)bits;
}
*array_pos = 0;
*pos += n_bits;
#endif
}
-static BROTLI_INLINE void BrotliWriteBitsPrepareStorage(
+static BROTLI_INLINE void BrotliWriteBitsPrepareStorage(
size_t pos, uint8_t* array) {
BROTLI_LOG(("WriteBitsPrepareStorage %10d\n", (int)pos));
BROTLI_DCHECK((pos & 7) == 0);
array[pos >> 3] = 0;
}
-#if defined(__cplusplus) || defined(c_plusplus)
-} /* extern "C" */
-#endif
+#if defined(__cplusplus) || defined(c_plusplus)
+} /* extern "C" */
+#endif
-#endif /* BROTLI_ENC_WRITE_BITS_H_ */
+#endif /* BROTLI_ENC_WRITE_BITS_H_ */