kc3-lang/brotli/common/port.h

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• Hash : f1c9ab29
  Author :
  Date : 2016-06-03T10:51:04
  

  Extract common parts: constants, dictionary, etc.
  

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• common/port.h

• /* 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 > 300 || BROTLI_ICC_VERSION >= 1600
  #define BROTLI_MODERN_COMPILER 1
  #else
  #define BROTLI_MODERN_COMPILER 0
  #endif
  
  /* Define "PREDICT_TRUE" and "PREDICT_FALSE" macros for capable compilers.
  
  To apply compiler hint, enclose the branching condition into macros, like this:
  
    if (PREDICT_TRUE(zero == 0)) {
      // main execution path
    } else {
      // compiler should place this code outside of main execution path
    }
  
  OR:
  
    if (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 PREDICT_TRUE(x) (__builtin_expect(!!(x), 1))
  #define PREDICT_FALSE(x) (__builtin_expect(x, 0))
  #else
  #define PREDICT_FALSE(x) (x)
  #define PREDICT_TRUE(x) (x)
  #endif
  
  #if BROTLI_MODERN_COMPILER || __has_attribute(always_inline)
  #define ATTRIBUTE_ALWAYS_INLINE __attribute__ ((always_inline))
  #else
  #define ATTRIBUTE_ALWAYS_INLINE
  #endif
  
  #if defined(_WIN32) || defined(__CYGWIN__)
  #define ATTRIBUTE_VISIBILITY_HIDDEN
  #elif BROTLI_MODERN_COMPILER || __has_attribute(visibility)
  #define ATTRIBUTE_VISIBILITY_HIDDEN __attribute__ ((visibility ("hidden")))
  #else
  #define ATTRIBUTE_VISIBILITY_HIDDEN
  #endif
  
  #ifndef BROTLI_INTERNAL
  #define BROTLI_INTERNAL ATTRIBUTE_VISIBILITY_HIDDEN
  #endif
  
  #ifndef _MSC_VER
  #if defined(__cplusplus) || !defined(__STRICT_ANSI__) || \
      __STDC_VERSION__ >= 199901L
  #define BROTLI_INLINE inline ATTRIBUTE_ALWAYS_INLINE
  #else
  #define BROTLI_INLINE
  #endif
  #else  /* _MSC_VER */
  #define BROTLI_INLINE __forceinline
  #endif  /* _MSC_VER */
  
  #if BROTLI_MODERN_COMPILER || __has_attribute(noinline)
  #define BROTLI_NOINLINE __attribute__((noinline))
  #else
  #define BROTLI_NOINLINE
  #endif
  
  #define BROTLI_UNUSED(X) (void)(X)
  
  #endif  /* BROTLI_COMMON_PORT_H_ */
  

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