Mercurial > hg > orthanc-webviewer
annotate Orthanc/Core/Endianness.h @ 146:3cde3e806abe
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author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 09 Nov 2016 12:20:01 +0100 |
parents | 3251ec958a29 |
children | 5dc54316d68b |
rev | line source |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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4 * Department, University Hospital of Liege, Belgium |
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5 * |
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6 * This program is free software: you can redistribute it and/or |
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7 * modify it under the terms of the GNU General Public License as |
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8 * published by the Free Software Foundation, either version 3 of the |
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9 * License, or (at your option) any later version. |
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10 * |
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11 * In addition, as a special exception, the copyright holders of this |
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12 * program give permission to link the code of its release with the |
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it |
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14 * that use the same license as the "OpenSSL" library), and distribute |
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15 * the linked executables. You must obey the GNU General Public License |
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16 * in all respects for all of the code used other than "OpenSSL". If you |
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17 * modify file(s) with this exception, you may extend this exception to |
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18 * your version of the file(s), but you are not obligated to do so. If |
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19 * you do not wish to do so, delete this exception statement from your |
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20 * version. If you delete this exception statement from all source files |
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21 * in the program, then also delete it here. |
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22 * |
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23 * This program is distributed in the hope that it will be useful, but |
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of |
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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26 * General Public License for more details. |
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27 * |
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28 * You should have received a copy of the GNU General Public License |
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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30 **/ |
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31 |
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32 |
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33 #pragma once |
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34 |
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35 |
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36 /******************************************************************** |
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37 ** LINUX ARCHITECTURES |
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38 ********************************************************************/ |
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39 |
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40 #if defined(__linux__) |
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41 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
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42 # include <endian.h> |
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43 #endif |
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44 |
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45 |
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46 /******************************************************************** |
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47 ** WINDOWS ARCHITECTURES |
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48 ** |
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49 ** On Windows x86, "host" will always be little-endian ("le"). |
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50 ********************************************************************/ |
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51 |
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52 #if defined(_WIN32) |
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53 # if defined(_MSC_VER) |
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54 // Visual Studio - http://msdn.microsoft.com/en-us/library/a3140177.aspx |
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55 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
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56 # define be16toh(x) _byteswap_ushort(x) |
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57 # define be32toh(x) _byteswap_ulong(x) |
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58 # define be64toh(x) _byteswap_uint64(x) |
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59 # elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) |
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60 // MinGW >= 4.3 - Use builtin intrinsic for byte swapping |
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61 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
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62 # define be16toh(x) __builtin_bswap16(x) |
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63 # define be32toh(x) __builtin_bswap32(x) |
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64 # define be64toh(x) __builtin_bswap64(x) |
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65 # else |
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66 // MinGW <= 4.2, we must manually implement the byte swapping |
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67 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 |
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68 # define be16toh(x) __orthanc_bswap16(x) |
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69 # define be32toh(x) __orthanc_bswap32(x) |
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70 # define be64toh(x) __orthanc_bswap64(x) |
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71 # endif |
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72 |
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73 # define htobe16(x) be16toh(x) |
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74 # define htobe32(x) be32toh(x) |
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75 # define htobe64(x) be64toh(x) |
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76 |
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77 # define htole16(x) x |
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78 # define htole32(x) x |
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79 # define htole64(x) x |
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80 |
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81 # define le16toh(x) x |
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82 # define le32toh(x) x |
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83 # define le64toh(x) x |
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84 #endif |
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85 |
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86 |
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87 /******************************************************************** |
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88 ** FREEBSD ARCHITECTURES |
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89 ********************************************************************/ |
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90 |
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91 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) |
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92 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
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93 # include <arpa/inet.h> |
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94 #endif |
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95 |
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96 |
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97 /******************************************************************** |
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98 ** APPLE ARCHITECTURES (including OS X) |
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99 ********************************************************************/ |
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100 |
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101 #if defined(__APPLE__) |
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102 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
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103 # include <libkern/OSByteOrder.h> |
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104 # define be16toh(x) OSSwapBigToHostInt16(x) |
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105 # define be32toh(x) OSSwapBigToHostInt32(x) |
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106 # define be64toh(x) OSSwapBigToHostInt64(x) |
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107 |
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108 # define htobe16(x) OSSwapHostToBigInt16(x) |
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109 # define htobe32(x) OSSwapHostToBigInt32(x) |
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110 # define htobe64(x) OSSwapHostToBigInt64(x) |
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111 |
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112 # define htole16(x) OSSwapHostToLittleInt16(x) |
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113 # define htole32(x) OSSwapHostToLittleInt32(x) |
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114 # define htole64(x) OSSwapHostToLittleInt64(x) |
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115 |
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116 # define le16toh(x) OSSwapLittleToHostInt16(x) |
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117 # define le32toh(x) OSSwapLittleToHostInt32(x) |
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118 # define le64toh(x) OSSwapLittleToHostInt64(x) |
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119 #endif |
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120 |
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121 |
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122 /******************************************************************** |
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123 ** PORTABLE (BUT SLOW) IMPLEMENTATION OF BYTE-SWAPPING |
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124 ********************************************************************/ |
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125 |
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126 #if ORTHANC_HAS_BUILTIN_BYTE_SWAP != 1 |
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127 |
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128 #include <stdint.h> |
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129 |
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130 static inline uint16_t __orthanc_bswap16(uint16_t a) |
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131 { |
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132 return (a << 8) | (a >> 8); |
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133 } |
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134 |
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135 static inline uint32_t __orthanc_bswap32(uint32_t a) |
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136 { |
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137 const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); |
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138 return (static_cast<uint32_t>(p[0]) << 24 | |
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139 static_cast<uint32_t>(p[1]) << 16 | |
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140 static_cast<uint32_t>(p[2]) << 8 | |
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141 static_cast<uint32_t>(p[3])); |
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142 } |
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143 |
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144 static inline uint64_t __orthanc_bswap64(uint64_t a) |
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145 { |
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146 const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); |
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147 return (static_cast<uint64_t>(p[0]) << 56 | |
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148 static_cast<uint64_t>(p[1]) << 48 | |
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149 static_cast<uint64_t>(p[2]) << 40 | |
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150 static_cast<uint64_t>(p[3]) << 32 | |
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151 static_cast<uint64_t>(p[4]) << 24 | |
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152 static_cast<uint64_t>(p[5]) << 16 | |
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153 static_cast<uint64_t>(p[6]) << 8 | |
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154 static_cast<uint64_t>(p[7])); |
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155 } |
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156 |
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157 #endif |