Mercurial > hg > orthanc
view OrthancFramework/Sources/Endianness.h @ 4823:241d83204c23 filter-store-instance
closing branch filter-store-instance
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 25 Nov 2021 13:25:54 +0100 |
parents | c1f36fd13730 |
children | 7053502fbf97 |
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/** * Orthanc - A Lightweight, RESTful DICOM Store * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2021 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #pragma once /******************************************************************** ** LINUX-LIKE ARCHITECTURES ********************************************************************/ #if defined(__LSB_VERSION__) // Linux Standard Base (LSB) does not come with be16toh, be32toh, and // be64toh # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 # include <endian.h> #elif defined(__linux__) || defined(__EMSCRIPTEN__) # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 # include <endian.h> #endif /******************************************************************** ** WINDOWS ARCHITECTURES ** ** On Windows x86, "host" will always be little-endian ("le"). ********************************************************************/ #if defined(_WIN32) # if defined(_MSC_VER) // Visual Studio - http://msdn.microsoft.com/en-us/library/a3140177.aspx # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 # define be16toh(x) _byteswap_ushort(x) # define be32toh(x) _byteswap_ulong(x) # define be64toh(x) _byteswap_uint64(x) # elif (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)) // MinGW >= 4.3 - Use builtin intrinsic for byte swapping # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 # define be16toh(x) __builtin_bswap16(x) # define be32toh(x) __builtin_bswap32(x) # define be64toh(x) __builtin_bswap64(x) # else // MinGW <= 4.2, we must manually implement the byte swapping (*) # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 0 # define be16toh(x) __orthanc_bswap16(x) # define be32toh(x) __orthanc_bswap32(x) # define be64toh(x) __orthanc_bswap64(x) # endif # define htobe16(x) be16toh(x) # define htobe32(x) be32toh(x) # define htobe64(x) be64toh(x) # define htole16(x) x # define htole32(x) x # define htole64(x) x # define le16toh(x) x # define le32toh(x) x # define le64toh(x) x #endif /******************************************************************** ** FREEBSD ARCHITECTURES ********************************************************************/ #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 # include <arpa/inet.h> #endif /******************************************************************** ** OPENBSD ARCHITECTURES ********************************************************************/ #if defined(__OpenBSD__) # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 # include <endian.h> #endif /******************************************************************** ** APPLE ARCHITECTURES (including OS X) ********************************************************************/ #if defined(__APPLE__) # define ORTHANC_HAS_BUILTIN_BYTE_SWAP 1 # include <libkern/OSByteOrder.h> # define be16toh(x) OSSwapBigToHostInt16(x) # define be32toh(x) OSSwapBigToHostInt32(x) # define be64toh(x) OSSwapBigToHostInt64(x) # define htobe16(x) OSSwapHostToBigInt16(x) # define htobe32(x) OSSwapHostToBigInt32(x) # define htobe64(x) OSSwapHostToBigInt64(x) # define htole16(x) OSSwapHostToLittleInt16(x) # define htole32(x) OSSwapHostToLittleInt32(x) # define htole64(x) OSSwapHostToLittleInt64(x) # define le16toh(x) OSSwapLittleToHostInt16(x) # define le32toh(x) OSSwapLittleToHostInt32(x) # define le64toh(x) OSSwapLittleToHostInt64(x) #endif /******************************************************************** ** PORTABLE (BUT SLOW) IMPLEMENTATION OF BYTE-SWAPPING ********************************************************************/ #if ORTHANC_HAS_BUILTIN_BYTE_SWAP != 1 #include <stdint.h> static inline uint16_t __orthanc_bswap16(uint16_t a) { /** * Note that an alternative implementation was included in Orthanc * 1.4.0 and 1.4.1: * * # hg log -p -r 2706 * * This alternative implementation only hid an underlying problem * with pointer alignment on some architectures, and was thus * reverted. Check out issue #99: * https://bugs.orthanc-server.com/show_bug.cgi?id=99 **/ return (a << 8) | (a >> 8); } static inline uint32_t __orthanc_bswap32(uint32_t a) { const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); return (static_cast<uint32_t>(p[0]) << 24 | static_cast<uint32_t>(p[1]) << 16 | static_cast<uint32_t>(p[2]) << 8 | static_cast<uint32_t>(p[3])); } static inline uint64_t __orthanc_bswap64(uint64_t a) { const uint8_t* p = reinterpret_cast<const uint8_t*>(&a); return (static_cast<uint64_t>(p[0]) << 56 | static_cast<uint64_t>(p[1]) << 48 | static_cast<uint64_t>(p[2]) << 40 | static_cast<uint64_t>(p[3]) << 32 | static_cast<uint64_t>(p[4]) << 24 | static_cast<uint64_t>(p[5]) << 16 | static_cast<uint64_t>(p[6]) << 8 | static_cast<uint64_t>(p[7])); } #if defined(_WIN32) // Implemented above (*) #elif defined(__BYTE_ORDER) && defined(__LITTLE_ENDIAN) && defined(__BIG_ENDIAN) # if __BYTE_ORDER == __LITTLE_ENDIAN # define be16toh(x) __orthanc_bswap16(x) # define be32toh(x) __orthanc_bswap32(x) # define be64toh(x) __orthanc_bswap64(x) # define htobe16(x) __orthanc_bswap16(x) # define htobe32(x) __orthanc_bswap32(x) # define htobe64(x) __orthanc_bswap64(x) # define htole16(x) x # define htole32(x) x # define htole64(x) x # define le16toh(x) x # define le32toh(x) x # define le64toh(x) x # elif __BYTE_ORDER == __BIG_ENDIAN # define be16toh(x) x # define be32toh(x) x # define be64toh(x) x # define htobe16(x) x # define htobe32(x) x # define htobe64(x) x # define htole16(x) __orthanc_bswap16(x) # define htole32(x) __orthanc_bswap32(x) # define htole64(x) __orthanc_bswap64(x) # define le16toh(x) __orthanc_bswap16(x) # define le32toh(x) __orthanc_bswap32(x) # define le64toh(x) __orthanc_bswap64(x) # else # error Please support your platform here # endif #else # error Please support your platform here #endif #endif