Mercurial > hg > orthanc
annotate Core/Endianness.h @ 3477:a4f2354f04c3
fix warning from gcc 8.3.0
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 31 Jul 2019 14:35:58 +0200 |
parents | 4e43e67f8ecf |
children | 94f4a18a79cc |
rev | line source |
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1938 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
1938 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU General Public License as | |
9 * published by the Free Software Foundation, either version 3 of the | |
10 * License, or (at your option) any later version. | |
11 * | |
12 * In addition, as a special exception, the copyright holders of this | |
13 * program give permission to link the code of its release with the | |
14 * OpenSSL project's "OpenSSL" library (or with modified versions of it | |
15 * that use the same license as the "OpenSSL" library), and distribute | |
16 * the linked executables. You must obey the GNU General Public License | |
17 * in all respects for all of the code used other than "OpenSSL". If you | |
18 * modify file(s) with this exception, you may extend this exception to | |
19 * your version of the file(s), but you are not obligated to do so. If | |
20 * you do not wish to do so, delete this exception statement from your | |
21 * version. If you delete this exception statement from all source files | |
22 * in the program, then also delete it here. | |
23 * | |
24 * This program is distributed in the hope that it will be useful, but | |
25 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
27 * General Public License for more details. | |
28 * | |
29 * You should have received a copy of the GNU General Public License | |
30 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
31 **/ | |
32 | |
33 | |
34 #pragma once | |
35 | |
36 | |
37 /******************************************************************** | |
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38 ** LINUX-LIKE ARCHITECTURES |
1938 | 39 ********************************************************************/ |
40 | |
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41 #if defined(__LSB_VERSION__) |
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42 // Linux Standard Base (LSB) does not come with be16toh, be32toh, and |
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43 // be64toh |
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44 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 |
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45 # include <endian.h> |
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46 #elif defined(__linux__) || defined(__EMSCRIPTEN__) |
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47 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
1938 | 48 # include <endian.h> |
49 #endif | |
50 | |
51 | |
52 /******************************************************************** | |
53 ** WINDOWS ARCHITECTURES | |
54 ** | |
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55 ** On Windows x86, "host" will always be little-endian ("le"). |
1938 | 56 ********************************************************************/ |
57 | |
58 #if defined(_WIN32) | |
59 # if defined(_MSC_VER) | |
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60 // Visual Studio - http://msdn.microsoft.com/en-us/library/a3140177.aspx |
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61 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
1938 | 62 # define be16toh(x) _byteswap_ushort(x) |
63 # define be32toh(x) _byteswap_ulong(x) | |
64 # define be64toh(x) _byteswap_uint64(x) | |
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65 # elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) |
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66 // MinGW >= 4.3 - Use builtin intrinsic for byte swapping |
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67 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
1938 | 68 # define be16toh(x) __builtin_bswap16(x) |
69 # define be32toh(x) __builtin_bswap32(x) | |
70 # define be64toh(x) __builtin_bswap64(x) | |
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71 # else |
2546 | 72 // MinGW <= 4.2, we must manually implement the byte swapping (*) |
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73 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 |
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74 # define be16toh(x) __orthanc_bswap16(x) |
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75 # define be32toh(x) __orthanc_bswap32(x) |
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76 # define be64toh(x) __orthanc_bswap64(x) |
1938 | 77 # endif |
78 | |
79 # define htobe16(x) be16toh(x) | |
80 # define htobe32(x) be32toh(x) | |
81 # define htobe64(x) be64toh(x) | |
82 | |
83 # define htole16(x) x | |
84 # define htole32(x) x | |
85 # define htole64(x) x | |
86 | |
87 # define le16toh(x) x | |
88 # define le32toh(x) x | |
89 # define le64toh(x) x | |
90 #endif | |
91 | |
92 | |
93 /******************************************************************** | |
94 ** FREEBSD ARCHITECTURES | |
95 ********************************************************************/ | |
96 | |
97 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) | |
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98 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
1938 | 99 # include <arpa/inet.h> |
100 #endif | |
101 | |
102 | |
103 /******************************************************************** | |
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104 ** OPENBSD ARCHITECTURES |
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105 ********************************************************************/ |
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106 |
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107 #if defined(__OpenBSD__) |
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108 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
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109 # include <endian.h> |
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110 #endif |
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111 |
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112 |
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113 /******************************************************************** |
1938 | 114 ** APPLE ARCHITECTURES (including OS X) |
115 ********************************************************************/ | |
116 | |
117 #if defined(__APPLE__) | |
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118 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 |
1938 | 119 # include <libkern/OSByteOrder.h> |
120 # define be16toh(x) OSSwapBigToHostInt16(x) | |
121 # define be32toh(x) OSSwapBigToHostInt32(x) | |
122 # define be64toh(x) OSSwapBigToHostInt64(x) | |
123 | |
124 # define htobe16(x) OSSwapHostToBigInt16(x) | |
125 # define htobe32(x) OSSwapHostToBigInt32(x) | |
126 # define htobe64(x) OSSwapHostToBigInt64(x) | |
127 | |
128 # define htole16(x) OSSwapHostToLittleInt16(x) | |
129 # define htole32(x) OSSwapHostToLittleInt32(x) | |
130 # define htole64(x) OSSwapHostToLittleInt64(x) | |
131 | |
132 # define le16toh(x) OSSwapLittleToHostInt16(x) | |
133 # define le32toh(x) OSSwapLittleToHostInt32(x) | |
134 # define le64toh(x) OSSwapLittleToHostInt64(x) | |
135 #endif | |
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136 |
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137 |
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138 /******************************************************************** |
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139 ** PORTABLE (BUT SLOW) IMPLEMENTATION OF BYTE-SWAPPING |
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140 ********************************************************************/ |
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141 |
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142 #if ORTHANC_HAS_BUILTIN_BYTE_SWAP != 1 |
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143 |
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144 #include <stdint.h> |
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145 |
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146 static inline uint16_t __orthanc_bswap16(uint16_t a) |
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147 { |
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148 /** |
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149 * Note that an alternative implementation was included in Orthanc |
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150 * 1.4.0 and 1.4.1: |
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151 * |
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152 * # hg log -p -r 2706 |
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153 * |
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154 * This alternative implementation only hid an underlying problem |
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155 * with pointer alignment on some architectures, and was thus |
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156 * reverted. Check out issue #99: |
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157 * https://bitbucket.org/sjodogne/orthanc/issues/99 |
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158 **/ |
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159 return (a << 8) | (a >> 8); |
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160 } |
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161 |
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162 static inline uint32_t __orthanc_bswap32(uint32_t a) |
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163 { |
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164 const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); |
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165 return (static_cast<uint32_t>(p[0]) << 24 | |
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166 static_cast<uint32_t>(p[1]) << 16 | |
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167 static_cast<uint32_t>(p[2]) << 8 | |
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168 static_cast<uint32_t>(p[3])); |
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169 } |
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170 |
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171 static inline uint64_t __orthanc_bswap64(uint64_t a) |
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172 { |
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173 const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); |
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174 return (static_cast<uint64_t>(p[0]) << 56 | |
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175 static_cast<uint64_t>(p[1]) << 48 | |
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176 static_cast<uint64_t>(p[2]) << 40 | |
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177 static_cast<uint64_t>(p[3]) << 32 | |
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178 static_cast<uint64_t>(p[4]) << 24 | |
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179 static_cast<uint64_t>(p[5]) << 16 | |
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180 static_cast<uint64_t>(p[6]) << 8 | |
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181 static_cast<uint64_t>(p[7])); |
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182 } |
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183 |
2546 | 184 #if defined(_WIN32) |
185 // Implemented above (*) | |
186 #elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) | |
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187 # if __BYTE_ORDER == __LITTLE_ENDIAN |
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188 # define be16toh(x) __orthanc_bswap16(x) |
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189 # define be32toh(x) __orthanc_bswap32(x) |
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190 # define be64toh(x) __orthanc_bswap64(x) |
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191 # define htobe16(x) __orthanc_bswap16(x) |
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192 # define htobe32(x) __orthanc_bswap32(x) |
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193 # define htobe64(x) __orthanc_bswap64(x) |
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194 # define htole16(x) x |
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195 # define htole32(x) x |
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196 # define htole64(x) x |
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197 # define le16toh(x) x |
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198 # define le32toh(x) x |
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199 # define le64toh(x) x |
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200 # elif __BYTE_ORDER == __BIG_ENDIAN |
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201 # define be16toh(x) x |
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202 # define be32toh(x) x |
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203 # define be64toh(x) x |
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204 # define htobe16(x) x |
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205 # define htobe32(x) x |
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206 # define htobe64(x) x |
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207 # define htole16(x) __orthanc_bswap16(x) |
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208 # define htole32(x) __orthanc_bswap32(x) |
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209 # define htole64(x) __orthanc_bswap64(x) |
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210 # define le16toh(x) __orthanc_bswap16(x) |
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211 # define le32toh(x) __orthanc_bswap32(x) |
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212 # define le64toh(x) __orthanc_bswap64(x) |
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213 # else |
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214 # error Please support your platform here |
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215 # endif |
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216 #else |
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217 # error Please support your platform here |
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218 #endif |
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219 |
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220 #endif |