src/endian.h

   1 ///
   2 /// \file       endian.h
   3 ///             Endian conversion macros
   4 ///
   5
   6 /*
   7     Copyright (C) 2006-2010, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #ifndef __BARRY_ENDIAN_H__
  23 #define __BARRY_ENDIAN_H__
  24
  25 // The Blackberry is little endian in its USB data.  Fortunately,
  26 // this makes conversion easy on the x86...
  27 #include "config.h"
  28 #include <stdint.h>
  29
  30 //#include <byteswap.h>
  31
  32 // The following is a byteswap.h replacement, for systems like Mac OS X.
  33 // It was taken from a patch to the GPL software cowpatty, patch
  34 // by user gm2net.
  35 // http://www.netstumbler.org/showpost.php?s=79764fd1526e4653d5cb4432225da6ee&p=190494&postcount=29
  36
  37 //#warning "byteswap.h is an unportable GNU extension!  Don't use!"
  38
  39 static inline unsigned short bswap_16(unsigned short x) {
  40   return (x>>8) | (x<<8);
  41 }
  42
  43 static inline unsigned int bswap_32(unsigned int x) {
  44   return (bswap_16(x&0xffff)<<16) | (bswap_16(x>>16));
  45 }
  46
  47 static inline uint64_t bswap_64(uint64_t x) {
  48   return (((uint64_t)bswap_32(x&0xffffffffull))<<32) | (bswap_32(x>>32));
  49 }
  50
  51 #ifndef WORDS_BIGENDIAN
  52
  53 // For when Blackberry needs little endian (most of the time)
  54 #define btohs(x) x                      // for uint16_t
  55 #define btohl(x) x                      // for uint32_t
  56 #define btohll(x) x                     // for uint64_t
  57 #define htobs(x) x                      // for uint16_t
  58 #define htobl(x) x                      // for uint32_t
  59 #define htobll(x) x                     // for uint64_t
  60
  61 // For when Blackberry needs big endian (often in JavaLoader protocol)
  62 #define be_btohs(x) bswap_16(x)         // for uint16_t
  63 #define be_btohl(x) bswap_32(x)         // for uint32_t
  64 #define be_btohll(x) bswap_64(x)        // for uint64_t
  65 #define be_htobs(x) bswap_16(x)         // for uint16_t
  66 #define be_htobl(x) bswap_32(x)         // for uint32_t
  67 #define be_htobll(x) bswap_64(x)        // for uint64_t
  68
  69 #else
  70
  71 // For when Blackberry needs little endian (most of the time)
  72 #define btohs(x) bswap_16(x)            // for uint16_t
  73 #define btohl(x) bswap_32(x)            // for uint32_t
  74 #define btohll(x) bswap_64(x)           // for uint64_t
  75 #define htobs(x) bswap_16(x)            // for uint16_t
  76 #define htobl(x) bswap_32(x)            // for uint32_t
  77 #define htobll(x) bswap_64(x)           // for uint64_t
  78
  79 // For when Blackberry needs big endian (often in JavaLoader protocol)
  80 #define be_btohs(x) x                   // for uint16_t
  81 #define be_btohl(x) x                   // for uint32_t
  82 #define be_btohll(x) x                  // for uint64_t
  83 #define be_htobs(x) x                   // for uint16_t
  84 #define be_htobl(x) x                   // for uint32_t
  85 #define be_htobll(x) x                  // for uint64_t
  86
  87 #endif
  88
  89 #endif
  90