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36ff6d8019
- Copy Brotli algorithm 3rd party source code for library Cc: Liming Gao <liming.gao@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Bell Song <binx.song@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>
108 lines
2.7 KiB
C
108 lines
2.7 KiB
C
/* Copyright 2016 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Macros for compiler / platform specific features and build options. */
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#ifndef BROTLI_COMMON_PORT_H_
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#define BROTLI_COMMON_PORT_H_
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/* Compatibility with non-clang compilers. */
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#ifndef __has_builtin
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#define __has_builtin(x) 0
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#endif
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#ifndef __has_attribute
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#define __has_attribute(x) 0
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#endif
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#ifndef __has_feature
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#define __has_feature(x) 0
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#endif
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#if defined(__GNUC__) && defined(__GNUC_MINOR__)
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#define BROTLI_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
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#else
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#define BROTLI_GCC_VERSION 0
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#endif
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#if defined(__ICC)
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#define BROTLI_ICC_VERSION __ICC
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#else
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#define BROTLI_ICC_VERSION 0
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#endif
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#if defined(BROTLI_BUILD_MODERN_COMPILER)
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#define BROTLI_MODERN_COMPILER 1
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#elif BROTLI_GCC_VERSION > 300 || BROTLI_ICC_VERSION >= 1600
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#define BROTLI_MODERN_COMPILER 1
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#else
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#define BROTLI_MODERN_COMPILER 0
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#endif
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/* Define "PREDICT_TRUE" and "PREDICT_FALSE" macros for capable compilers.
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To apply compiler hint, enclose the branching condition into macros, like this:
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if (PREDICT_TRUE(zero == 0)) {
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// main execution path
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} else {
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// compiler should place this code outside of main execution path
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}
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OR:
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if (PREDICT_FALSE(something_rare_or_unexpected_happens)) {
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// compiler should place this code outside of main execution path
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}
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*/
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#if BROTLI_MODERN_COMPILER || __has_builtin(__builtin_expect)
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#define PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
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#define PREDICT_FALSE(x) (__builtin_expect(x, 0))
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#else
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#define PREDICT_FALSE(x) (x)
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#define PREDICT_TRUE(x) (x)
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#endif
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#if BROTLI_MODERN_COMPILER || __has_attribute(always_inline)
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#define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline))
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#else
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#define ATTRIBUTE_ALWAYS_INLINE
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#endif
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#if defined(_WIN32) || defined(__CYGWIN__)
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#define ATTRIBUTE_VISIBILITY_HIDDEN
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#elif BROTLI_MODERN_COMPILER || __has_attribute(visibility)
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#define ATTRIBUTE_VISIBILITY_HIDDEN __attribute__ ((visibility ("hidden")))
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#else
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#define ATTRIBUTE_VISIBILITY_HIDDEN
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#endif
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#ifndef BROTLI_INTERNAL
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#define BROTLI_INTERNAL ATTRIBUTE_VISIBILITY_HIDDEN
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#endif
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#ifndef _MSC_VER
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#if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
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__STDC_VERSION__ >= 199901L
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#define BROTLI_INLINE inline ATTRIBUTE_ALWAYS_INLINE
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#else
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#define BROTLI_INLINE
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#endif
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#else /* _MSC_VER */
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#define BROTLI_INLINE __forceinline
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#endif /* _MSC_VER */
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#if BROTLI_MODERN_COMPILER || __has_attribute(noinline)
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#define BROTLI_NOINLINE __attribute__((noinline))
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#else
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#define BROTLI_NOINLINE
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#endif
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#define BROTLI_UNUSED(X) (void)(X)
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#endif /* BROTLI_COMMON_PORT_H_ */
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