Update brotli to v1.0.0-snapshot.

third_party/brotli/enc/port.h

 /* Copyright 2013 Google Inc. All Rights Reserved.
 
    Distributed under MIT license.
    See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
 */
 
-// Macros for endianness, branch prediction and unaligned loads and stores.
+/* Macros for endianness, branch prediction and unaligned loads and stores. */
 
 #ifndef BROTLI_ENC_PORT_H_
 #define BROTLI_ENC_PORT_H_
 
 #include <assert.h>
-#include <string.h>
-#include "./types.h"
+#include <string.h>  /* memcpy */
+
+#include <brotli/port.h>
+#include <brotli/types.h>
 
 #if defined OS_LINUX || defined OS_CYGWIN
 #include <endian.h>
 #elif defined OS_FREEBSD
 #include <machine/endian.h>
 #elif defined OS_MACOSX
 #include <machine/endian.h>
 /* Let's try and follow the Linux convention */
 #define __BYTE_ORDER  BYTE_ORDER
 #define __LITTLE_ENDIAN LITTLE_ENDIAN
 #endif
 
-// define the macro IS_LITTLE_ENDIAN
-// using the above endian definitions from endian.h if
-// endian.h was included
+/* define the macro IS_LITTLE_ENDIAN
+   using the above endian definitions from endian.h if
+   endian.h was included */
 #ifdef __BYTE_ORDER
 #if __BYTE_ORDER == __LITTLE_ENDIAN
 #define IS_LITTLE_ENDIAN
 #endif
 
 #else
 
 #if defined(__LITTLE_ENDIAN__)
 #define IS_LITTLE_ENDIAN
 #endif
-#endif  // __BYTE_ORDER
+#endif  /* __BYTE_ORDER */
 
 #if defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
 #define IS_LITTLE_ENDIAN
 #endif
 
-// Enable little-endian optimization for x64 architecture on Windows.
+/* Enable little-endian optimization for x64 architecture on Windows. */
 #if (defined(_WIN32) || defined(_WIN64)) && defined(_M_X64)
 #define IS_LITTLE_ENDIAN
 #endif
 
-/* Compatibility with non-clang compilers. */
-#ifndef __has_builtin
-#define __has_builtin(x) 0
-#endif
-
-#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ > 95) || \
-    (defined(__llvm__) && __has_builtin(__builtin_expect))
-#define PREDICT_FALSE(x) (__builtin_expect(x, 0))
-#define PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
-#else
-#define PREDICT_FALSE(x) (x)
-#define PREDICT_TRUE(x) (x)
-#endif
-
-// Portable handling of unaligned loads, stores, and copies.
-// On some platforms, like ARM, the copy functions can be more efficient
-// then a load and a store.
+/* Portable handling of unaligned loads, stores, and copies.
+   On some platforms, like ARM, the copy functions can be more efficient
+   then a load and a store. */
 
 #if defined(ARCH_PIII) || \
   defined(ARCH_ATHLON) || defined(ARCH_K8) || defined(_ARCH_PPC)
 
-// x86 and x86-64 can perform unaligned loads/stores directly;
-// modern PowerPC hardware can also do unaligned integer loads and stores;
-// but note: the FPU still sends unaligned loads and stores to a trap handler!
+/* x86 and x86-64 can perform unaligned loads/stores directly;
+   modern PowerPC hardware can also do unaligned integer loads and stores;
+   but note: the FPU still sends unaligned loads and stores to a trap handler!
+*/
 
-#define BROTLI_UNALIGNED_LOAD32(_p) (*reinterpret_cast<const uint32_t *>(_p))
-#define BROTLI_UNALIGNED_LOAD64(_p) (*reinterpret_cast<const uint64_t *>(_p))
+#define BROTLI_UNALIGNED_LOAD32(_p) (*(const uint32_t *)(_p))
+#define BROTLI_UNALIGNED_LOAD64(_p) (*(const uint64_t *)(_p))
 
 #define BROTLI_UNALIGNED_STORE32(_p, _val) \
-  (*reinterpret_cast<uint32_t *>(_p) = (_val))
+  (*(uint32_t *)(_p) = (_val))
 #define BROTLI_UNALIGNED_STORE64(_p, _val) \
-  (*reinterpret_cast<uint64_t *>(_p) = (_val))
+  (*(uint64_t *)(_p) = (_val))
 
 #elif defined(__arm__) && \
   !defined(__ARM_ARCH_5__) && \
   !defined(__ARM_ARCH_5T__) && \
   !defined(__ARM_ARCH_5TE__) && \
   !defined(__ARM_ARCH_5TEJ__) && \
   !defined(__ARM_ARCH_6__) && \
   !defined(__ARM_ARCH_6J__) && \
   !defined(__ARM_ARCH_6K__) && \
   !defined(__ARM_ARCH_6Z__) && \
   !defined(__ARM_ARCH_6ZK__) && \
   !defined(__ARM_ARCH_6T2__)
 
-// ARMv7 and newer support native unaligned accesses, but only of 16-bit
-// and 32-bit values (not 64-bit); older versions either raise a fatal signal,
-// do an unaligned read and rotate the words around a bit, or do the reads very
-// slowly (trip through kernel mode).
+/* ARMv7 and newer support native unaligned accesses, but only of 16-bit
+   and 32-bit values (not 64-bit); older versions either raise a fatal signal,
+   do an unaligned read and rotate the words around a bit, or do the reads very
+   slowly (trip through kernel mode). */
 
-#define BROTLI_UNALIGNED_LOAD32(_p) (*reinterpret_cast<const uint32_t *>(_p))
+#define BROTLI_UNALIGNED_LOAD32(_p) (*(const uint32_t *)(_p))
 #define BROTLI_UNALIGNED_STORE32(_p, _val) \
-  (*reinterpret_cast<uint32_t *>(_p) = (_val))
+  (*(uint32_t *)(_p) = (_val))
 
-inline uint64_t BROTLI_UNALIGNED_LOAD64(const void *p) {
+static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64(const void *p) {
   uint64_t t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 
-inline void BROTLI_UNALIGNED_STORE64(void *p, uint64_t v) {
+static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64(void *p, uint64_t v) {
   memcpy(p, &v, sizeof v);
 }
 
 #else
 
-// These functions are provided for architectures that don't support
-// unaligned loads and stores.
+/* These functions are provided for architectures that don't support */
+/* unaligned loads and stores. */
 
-inline uint32_t BROTLI_UNALIGNED_LOAD32(const void *p) {
+static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32(const void *p) {
   uint32_t t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 
-inline uint64_t BROTLI_UNALIGNED_LOAD64(const void *p) {
+static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64(const void *p) {
   uint64_t t;
   memcpy(&t, p, sizeof t);
   return t;
 }
 
-inline void BROTLI_UNALIGNED_STORE32(void *p, uint32_t v) {
+static BROTLI_INLINE void BROTLI_UNALIGNED_STORE32(void *p, uint32_t v) {
   memcpy(p, &v, sizeof v);
 }
 
-inline void BROTLI_UNALIGNED_STORE64(void *p, uint64_t v) {
+static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64(void *p, uint64_t v) {
   memcpy(p, &v, sizeof v);
 }
 
 #endif
 
-#endif  // BROTLI_ENC_PORT_H_
+#define TEMPLATE_(T)                                                           \
+  static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \
+  static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; }
+TEMPLATE_(double) TEMPLATE_(float) TEMPLATE_(int)
+TEMPLATE_(size_t) TEMPLATE_(uint32_t) TEMPLATE_(uint8_t)
+#undef TEMPLATE_
+#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B)))
+#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B)))
+
+#define BROTLI_SWAP(T, A, I, J) { \
+  T __brotli_swap_tmp = (A)[(I)]; \
+  (A)[(I)] = (A)[(J)];            \
+  (A)[(J)] = __brotli_swap_tmp;   \
+}
+
+#define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) {  \
+  if (C < (R)) {                                 \
+    size_t _new_size = (C == 0) ? (R) : C;       \
+    T* new_array;                                \
+    while (_new_size < (R)) _new_size *= 2;      \
+    new_array = BROTLI_ALLOC((M), T, _new_size); \
+    if (!BROTLI_IS_OOM(m) && C != 0)             \
+      memcpy(new_array, A, C * sizeof(T));       \
+    BROTLI_FREE((M), A);                         \
+    A = new_array;                               \
+    C = _new_size;                               \
+  }                                              \
+}
+
+#endif  /* BROTLI_ENC_PORT_H_ */