Mercurial > hg > orthanc-stone
comparison Resources/Orthanc/Core/Endianness.h @ 200:03afbee0cc7b
integration of Orthanc core into Stone
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 23 Mar 2018 11:04:03 +0100 |
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199:dabe9982fca3 | 200:03afbee0cc7b |
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1 /** | |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
5 * Copyright (C) 2017-2018 Osimis S.A., Belgium | |
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 /******************************************************************** | |
38 ** LINUX-LIKE ARCHITECTURES | |
39 ********************************************************************/ | |
40 | |
41 #if defined(__LSB_VERSION__) | |
42 // Linux Standard Base (LSB) does not come with be16toh, be32toh, and | |
43 // be64toh | |
44 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 | |
45 # include <endian.h> | |
46 #elif defined(__linux__) || defined(__EMSCRIPTEN__) | |
47 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 | |
48 # include <endian.h> | |
49 #endif | |
50 | |
51 | |
52 /******************************************************************** | |
53 ** WINDOWS ARCHITECTURES | |
54 ** | |
55 ** On Windows x86, "host" will always be little-endian ("le"). | |
56 ********************************************************************/ | |
57 | |
58 #if defined(_WIN32) | |
59 # if defined(_MSC_VER) | |
60 // Visual Studio - http://msdn.microsoft.com/en-us/library/a3140177.aspx | |
61 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 | |
62 # define be16toh(x) _byteswap_ushort(x) | |
63 # define be32toh(x) _byteswap_ulong(x) | |
64 # define be64toh(x) _byteswap_uint64(x) | |
65 # elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) | |
66 // MinGW >= 4.3 - Use builtin intrinsic for byte swapping | |
67 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 | |
68 # define be16toh(x) __builtin_bswap16(x) | |
69 # define be32toh(x) __builtin_bswap32(x) | |
70 # define be64toh(x) __builtin_bswap64(x) | |
71 # else | |
72 // MinGW <= 4.2, we must manually implement the byte swapping | |
73 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 | |
74 # define be16toh(x) __orthanc_bswap16(x) | |
75 # define be32toh(x) __orthanc_bswap32(x) | |
76 # define be64toh(x) __orthanc_bswap64(x) | |
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__) | |
98 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 | |
99 # include <arpa/inet.h> | |
100 #endif | |
101 | |
102 | |
103 /******************************************************************** | |
104 ** OPENBSD ARCHITECTURES | |
105 ********************************************************************/ | |
106 | |
107 #if defined(__OpenBSD__) | |
108 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 | |
109 # include <endian.h> | |
110 #endif | |
111 | |
112 | |
113 /******************************************************************** | |
114 ** APPLE ARCHITECTURES (including OS X) | |
115 ********************************************************************/ | |
116 | |
117 #if defined(__APPLE__) | |
118 # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 | |
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 | |
136 | |
137 | |
138 /******************************************************************** | |
139 ** PORTABLE (BUT SLOW) IMPLEMENTATION OF BYTE-SWAPPING | |
140 ********************************************************************/ | |
141 | |
142 #if ORTHANC_HAS_BUILTIN_BYTE_SWAP != 1 | |
143 | |
144 #include <stdint.h> | |
145 | |
146 static inline uint16_t __orthanc_bswap16(uint16_t a) | |
147 { | |
148 return (a << 8) | (a >> 8); | |
149 } | |
150 | |
151 static inline uint32_t __orthanc_bswap32(uint32_t a) | |
152 { | |
153 const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); | |
154 return (static_cast<uint32_t>(p[0]) << 24 | | |
155 static_cast<uint32_t>(p[1]) << 16 | | |
156 static_cast<uint32_t>(p[2]) << 8 | | |
157 static_cast<uint32_t>(p[3])); | |
158 } | |
159 | |
160 static inline uint64_t __orthanc_bswap64(uint64_t a) | |
161 { | |
162 const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); | |
163 return (static_cast<uint64_t>(p[0]) << 56 | | |
164 static_cast<uint64_t>(p[1]) << 48 | | |
165 static_cast<uint64_t>(p[2]) << 40 | | |
166 static_cast<uint64_t>(p[3]) << 32 | | |
167 static_cast<uint64_t>(p[4]) << 24 | | |
168 static_cast<uint64_t>(p[5]) << 16 | | |
169 static_cast<uint64_t>(p[6]) << 8 | | |
170 static_cast<uint64_t>(p[7])); | |
171 } | |
172 | |
173 #if defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) | |
174 # if __BYTE_ORDER == __LITTLE_ENDIAN | |
175 # define be16toh(x) __orthanc_bswap16(x) | |
176 # define be32toh(x) __orthanc_bswap32(x) | |
177 # define be64toh(x) __orthanc_bswap64(x) | |
178 # define htobe16(x) __orthanc_bswap16(x) | |
179 # define htobe32(x) __orthanc_bswap32(x) | |
180 # define htobe64(x) __orthanc_bswap64(x) | |
181 # define htole16(x) x | |
182 # define htole32(x) x | |
183 # define htole64(x) x | |
184 # define le16toh(x) x | |
185 # define le32toh(x) x | |
186 # define le64toh(x) x | |
187 # elif __BYTE_ORDER == __BIG_ENDIAN | |
188 # define be16toh(x) x | |
189 # define be32toh(x) x | |
190 # define be64toh(x) x | |
191 # define htobe16(x) x | |
192 # define htobe32(x) x | |
193 # define htobe64(x) x | |
194 # define htole16(x) __orthanc_bswap16(x) | |
195 # define htole32(x) __orthanc_bswap32(x) | |
196 # define htole64(x) __orthanc_bswap64(x) | |
197 # define le16toh(x) __orthanc_bswap16(x) | |
198 # define le32toh(x) __orthanc_bswap32(x) | |
199 # define le64toh(x) __orthanc_bswap64(x) | |
200 # else | |
201 # error Please support your platform here | |
202 # endif | |
203 #else | |
204 # error Please support your platform here | |
205 #endif | |
206 | |
207 #endif |