view release on metacpan or  search on metacpan

brotli/c/common/platform.h  view on Meta::CPAN

/* Copyright 2016 Google Inc. All Rights Reserved.

   Distributed under MIT license.
   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/

/* Macros for compiler / platform specific features and build options. */

#ifndef BROTLI_COMMON_PLATFORM_H_
#define BROTLI_COMMON_PLATFORM_H_

#include <string.h>  /* memcpy */
#include <stdlib.h>  /* malloc, free */

#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 BROTLI_X_BYTE_ORDER BYTE_ORDER
#define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN
#define BROTLI_X_BIG_ENDIAN BIG_ENDIAN
#endif

#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG)
#include <assert.h>
#include <stdio.h>
#endif

/* Macros for compiler / platform specific features and build options.

   Build options are:
    * BROTLI_BUILD_32_BIT disables 64-bit optimizations
    * BROTLI_BUILD_64_BIT forces to use 64-bit optimizations
    * BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations
    * BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations
    * BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations
    * BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned
      read and overlapping memcpy; this reduces decompression speed by 5%
    * BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs
    * BROTLI_DEBUG dumps file name and line number when decoder detects stream
      or memory error
    * BROTLI_ENABLE_LOG enables asserts and dumps various state information
*/

#if BROTLI_MODERN_COMPILER || __has_attribute(always_inline)
#define BROTLI_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline))
#else
#define BROTLI_ATTRIBUTE_ALWAYS_INLINE
#endif

#if defined(_WIN32) || defined(__CYGWIN__)
#define BROTLI_ATTRIBUTE_VISIBILITY_HIDDEN
#elif BROTLI_MODERN_COMPILER || __has_attribute(visibility)
#define BROTLI_ATTRIBUTE_VISIBILITY_HIDDEN \
    __attribute__ ((visibility ("hidden")))
#else
#define BROTLI_ATTRIBUTE_VISIBILITY_HIDDEN
#endif

#ifndef BROTLI_INTERNAL
#define BROTLI_INTERNAL BROTLI_ATTRIBUTE_VISIBILITY_HIDDEN
#endif

#ifndef _MSC_VER
#if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
    (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
#define BROTLI_INLINE inline BROTLI_ATTRIBUTE_ALWAYS_INLINE
#else
#define BROTLI_INLINE
#endif
#else  /* _MSC_VER */
#define BROTLI_INLINE __forceinline
#endif  /* _MSC_VER */

#if BROTLI_MODERN_COMPILER || __has_attribute(unused)
#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused))
#else
#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE
#endif

#if !defined(__cplusplus) && !defined(c_plusplus) && \
    (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L)
#define BROTLI_RESTRICT restrict
#elif BROTLI_GCC_VERSION > 295 || defined(__llvm__)
#define BROTLI_RESTRICT __restrict
#else
#define BROTLI_RESTRICT
#endif