147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
|
/* 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_PORT_H_
|
||
|
|
#define BROTLI_COMMON_PORT_H_
|
||
|
|
|
||
|
|
/* Compatibility with non-clang compilers. */
|
||
|
|
#ifndef __has_builtin
|
||
|
|
#define __has_builtin(x) 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef __has_attribute
|
||
|
|
#define __has_attribute(x) 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef __has_feature
|
||
|
|
#define __has_feature(x) 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__GNUC__) && defined(__GNUC_MINOR__)
|
||
|
|
#define BROTLI_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
|
||
|
|
#else
|
||
|
|
#define BROTLI_GCC_VERSION 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(__ICC)
|
||
|
|
#define BROTLI_ICC_VERSION __ICC
|
||
|
|
#else
|
||
|
|
#define BROTLI_ICC_VERSION 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(BROTLI_BUILD_MODERN_COMPILER)
|
||
|
|
#define BROTLI_MODERN_COMPILER 1
|
||
|
|
#elif BROTLI_GCC_VERSION >= 304 || BROTLI_ICC_VERSION >= 1600
|
||
|
|
#define BROTLI_MODERN_COMPILER 1
|
||
|
|
#else
|
||
|
|
#define BROTLI_MODERN_COMPILER 0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable
|
||
|
|
compilers.
|
||
|
|
|
||
|
|
To apply compiler hint, enclose the branching condition into macros, like this:
|
||
|
|
|
||
|
|
if (BROTLI_PREDICT_TRUE(zero == 0)) {
|
||
|
|
// main execution path
|
||
|
|
} else {
|
||
|
|
// compiler should place this code outside of main execution path
|
||
|
|
}
|
||
|
|
|
||
|
|
OR:
|
||
|
|
|
||
|
|
if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) {
|
||
|
|
// compiler should place this code outside of main execution path
|
||
|
|
}
|
||
|
|
|
||
|
|
*/
|
||
|
|
#if BROTLI_MODERN_COMPILER || __has_builtin(__builtin_expect)
|
||
|
|
#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
|
||
|
|
#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0))
|
||
|
|
#else
|
||
|
|
#define BROTLI_PREDICT_FALSE(x) (x)
|
||
|
|
#define BROTLI_PREDICT_TRUE(x) (x)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#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
|
||
|
|
|
||
|
|
#if defined(BROTLI_SHARED_COMPILATION) && defined(_WIN32)
|
||
|
|
#if defined(BROTLICOMMON_SHARED_COMPILATION)
|
||
|
|
#define BROTLI_COMMON_API __declspec(dllexport)
|
||
|
|
#else
|
||
|
|
#define BROTLI_COMMON_API __declspec(dllimport)
|
||
|
|
#endif /* BROTLICOMMON_SHARED_COMPILATION */
|
||
|
|
#if defined(BROTLIDEC_SHARED_COMPILATION)
|
||
|
|
#define BROTLI_DEC_API __declspec(dllexport)
|
||
|
|
#else
|
||
|
|
#define BROTLI_DEC_API __declspec(dllimport)
|
||
|
|
#endif /* BROTLIDEC_SHARED_COMPILATION */
|
||
|
|
#if defined(BROTLIENC_SHARED_COMPILATION)
|
||
|
|
#define BROTLI_ENC_API __declspec(dllexport)
|
||
|
|
#else
|
||
|
|
#define BROTLI_ENC_API __declspec(dllimport)
|
||
|
|
#endif /* BROTLIENC_SHARED_COMPILATION */
|
||
|
|
#else /* BROTLI_SHARED_COMPILATION && _WIN32 */
|
||
|
|
#define BROTLI_COMMON_API
|
||
|
|
#define BROTLI_DEC_API
|
||
|
|
#define BROTLI_ENC_API
|
||
|
|
#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 !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
|
||
|
|
|
||
|
|
#if BROTLI_MODERN_COMPILER || __has_attribute(noinline)
|
||
|
|
#define BROTLI_NOINLINE __attribute__((noinline))
|
||
|
|
#else
|
||
|
|
#define BROTLI_NOINLINE
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if BROTLI_MODERN_COMPILER || __has_attribute(deprecated)
|
||
|
|
#define BROTLI_DEPRECATED __attribute__((deprecated))
|
||
|
|
#else
|
||
|
|
#define BROTLI_DEPRECATED
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define BROTLI_UNUSED(X) (void)(X)
|
||
|
|
|
||
|
|
#endif /* BROTLI_COMMON_PORT_H_ */
|