Update brotli to v1.0.0-snapshot.

third_party/brotli/enc/write_bits.h

 /* 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.
+/* Write bits into a byte array. */
 
 #ifndef BROTLI_ENC_WRITE_BITS_H_
 #define BROTLI_ENC_WRITE_BITS_H_
 
 #include <assert.h>
-#include <stdio.h>
+#include <stdio.h>  /* printf */
 
+#include <brotli/types.h>
 #include "./port.h"
-#include "./types.h"
 
-namespace brotli {
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
 
-//#define BIT_WRITER_DEBUG
+/*#define BIT_WRITER_DEBUG */
 
-// 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.
-inline void WriteBits(size_t n_bits,
-                      uint64_t bits,
-                      size_t * __restrict pos,
-                      uint8_t * __restrict array) {
+/* 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) {
+#ifdef IS_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). */
+  uint8_t *p = &array[*pos >> 3];
+  uint64_t v = *p;
 #ifdef BIT_WRITER_DEBUG
   printf("WriteBits  %2d  0x%016llx  %10d\n", n_bits, bits, *pos);
 #endif
   assert((bits >> n_bits) == 0);
   assert(n_bits <= 56);
-#ifdef IS_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).
-  uint8_t *p = &array[*pos >> 3];
-  uint64_t v = *p;
   v |= bits << (*pos & 7);
-  BROTLI_UNALIGNED_STORE64(p, v);  // Set some bits.
+  BROTLI_UNALIGNED_STORE64(p, v);  /* Set some bits. */
   *pos += n_bits;
 #else
-  // implicit & 0xff is assumed for uint8_t arithmetics
+  /* 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;
   bits <<= bits_reserved_in_first_byte;
-  *array_pos++ |= static_cast<uint8_t>(bits);
-  for (size_t bits_left_to_write = n_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;
        bits_left_to_write -= 8) {
     bits >>= 8;
-    *array_pos++ = static_cast<uint8_t>(bits);
+    *array_pos++ = (uint8_t)bits;
   }
   *array_pos = 0;
   *pos += n_bits;
 #endif
 }
 
-inline void WriteBitsPrepareStorage(size_t pos, uint8_t *array) {
+static BROTLI_INLINE void BrotliWriteBitsPrepareStorage(
+    size_t pos, uint8_t *array) {
 #ifdef BIT_WRITER_DEBUG
   printf("WriteBitsPrepareStorage            %10d\n", pos);
 #endif
   assert((pos & 7) == 0);
   array[pos >> 3] = 0;
 }
 
-}  // namespace brotli
+#if defined(__cplusplus) || defined(c_plusplus)
+}  /* extern "C" */
+#endif
 
-#endif  // BROTLI_ENC_WRITE_BITS_H_
+#endif  /* BROTLI_ENC_WRITE_BITS_H_ */