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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
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