thodg/libgit2/src/bswap.h

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• Hash : 87d9869f
  Author :
  Date : 2011-09-19T03:34:49
  

  Tabify everything There were quite a few places were spaces were being used instead of tabs. Try to catch them all. This should hopefully not break anything. Except for `git blame`. Oh well.

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• src/bswap.h

• /*
   * Copyright (C) 2009-2011 the libgit2 contributors
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "common.h"
  
  /*
   * Default version that the compiler ought to optimize properly with
   * constant values.
   */
  GIT_INLINE(uint32_t) default_swab32(uint32_t val)
  {
  	return (((val & 0xff000000) >> 24) |
  		((val & 0x00ff0000) >> 8) |
  		((val & 0x0000ff00) << 8) |
  		((val & 0x000000ff) << 24));
  }
  
  #undef bswap32
  
  GIT_INLINE(uint16_t) default_swab16(uint16_t val)
  {
  	return (((val & 0xff00) >> 8) |
  		((val & 0x00ff) << 8));
  }
  
  #undef bswap16
  
  #if defined(__GNUC__) && defined(__i386__)
  
  #define bswap32(x) ({ \
  	uint32_t __res; \
  	if (__builtin_constant_p(x)) { \
  		__res = default_swab32(x); \
  	} else { \
  		__asm__("bswap %0" : "=r" (__res) : "0" ((uint32_t)(x))); \
  	} \
  	__res; })
  
  #define bswap16(x) ({ \
  	uint16_t __res; \
  	if (__builtin_constant_p(x)) { \
  		__res = default_swab16(x); \
  	} else { \
  		__asm__("xchgb %b0,%h0" : "=q" (__res) : "0" ((uint16_t)(x))); \
  	} \
  	__res; })
  
  #elif defined(__GNUC__) && defined(__x86_64__)
  
  #define bswap32(x) ({ \
  	uint32_t __res; \
  	if (__builtin_constant_p(x)) { \
  		__res = default_swab32(x); \
  	} else { \
  		__asm__("bswapl %0" : "=r" (__res) : "0" ((uint32_t)(x))); \
  	} \
  	__res; })
  
  #define bswap16(x) ({ \
  	uint16_t __res; \
  	if (__builtin_constant_p(x)) { \
  		__res = default_swab16(x); \
  	} else { \
  		__asm__("xchgb %b0,%h0" : "=Q" (__res) : "0" ((uint16_t)(x))); \
  	} \
  	__res; })
  
  #elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
  
  #include <stdlib.h>
  
  #define bswap32(x) _byteswap_ulong(x)
  #define bswap16(x) _byteswap_ushort(x)
  
  #endif
  
  #ifdef bswap32
  
  #undef ntohl
  #undef htonl
  #define ntohl(x) bswap32(x)
  #define htonl(x) bswap32(x)
  
  #endif
  
  #ifdef bswap16
  
  #undef ntohs
  #undef htons
  #define ntohs(x) bswap16(x)
  #define htons(x) bswap16(x)
  
  #endif
  

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