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Diffstat (limited to 'include/google/protobuf/endian.h')
| -rw-r--r-- | include/google/protobuf/endian.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/include/google/protobuf/endian.h b/include/google/protobuf/endian.h new file mode 100644 index 0000000000..e0ee6cdf28 --- /dev/null +++ b/include/google/protobuf/endian.h @@ -0,0 +1,198 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifndef GOOGLE_PROTOBUF_ENDIAN_H__ +#define GOOGLE_PROTOBUF_ENDIAN_H__ + +#if defined(_MSC_VER) +#include <stdlib.h> +#endif + +#include <cstdint> + +// Must be included last. +#include <google/protobuf/port_def.inc> + +namespace google { +namespace protobuf { +namespace internal { + +inline uint64_t BSwap64(uint64_t host_int) { +#if defined(PROTOBUF_BUILTIN_BSWAP64) + return PROTOBUF_BUILTIN_BSWAP64(host_int); +#elif defined(_MSC_VER) + return _byteswap_uint64(host_int); +#else + return (((host_int & uint64_t{0xFF}) << 56) | + ((host_int & uint64_t{0xFF00}) << 40) | + ((host_int & uint64_t{0xFF0000}) << 24) | + ((host_int & uint64_t{0xFF000000}) << 8) | + ((host_int & uint64_t{0xFF00000000}) >> 8) | + ((host_int & uint64_t{0xFF0000000000}) >> 24) | + ((host_int & uint64_t{0xFF000000000000}) >> 40) | + ((host_int & uint64_t{0xFF00000000000000}) >> 56)); +#endif +} + +inline uint32_t BSwap32(uint32_t host_int) { +#if defined(PROTOBUF_BUILTIN_BSWAP32) + return PROTOBUF_BUILTIN_BSWAP32(host_int); +#elif defined(_MSC_VER) + return _byteswap_ulong(host_int); +#else + return (((host_int & uint32_t{0xFF}) << 24) | + ((host_int & uint32_t{0xFF00}) << 8) | + ((host_int & uint32_t{0xFF0000}) >> 8) | + ((host_int & uint32_t{0xFF000000}) >> 24)); +#endif +} + +inline uint16_t BSwap16(uint16_t host_int) { +#if defined(PROTOBUF_BUILTIN_BSWAP16) + return PROTOBUF_BUILTIN_BSWAP16(host_int); +#elif defined(_MSC_VER) + return _byteswap_ushort(host_int); +#else + return (((host_int & uint16_t{0xFF}) << 8) | + ((host_int & uint16_t{0xFF00}) >> 8)); +#endif +} + +namespace little_endian { + +inline uint16_t FromHost(uint16_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return BSwap16(value); +#else + return value; +#endif +} + +inline uint32_t FromHost(uint32_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return BSwap32(value); +#else + return value; +#endif +} + +inline uint64_t FromHost(uint64_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return BSwap64(value); +#else + return value; +#endif +} + +inline uint16_t ToHost(uint16_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return BSwap16(value); +#else + return value; +#endif +} + +inline uint32_t ToHost(uint32_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return BSwap32(value); +#else + return value; +#endif +} + +inline uint64_t ToHost(uint64_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return BSwap64(value); +#else + return value; +#endif +} + +} // namespace little_endian + +namespace big_endian { + +inline uint16_t FromHost(uint16_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return value; +#else + return BSwap16(value); +#endif +} + +inline uint32_t FromHost(uint32_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return value; +#else + return BSwap32(value); +#endif +} + +inline uint64_t FromHost(uint64_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return value; +#else + return BSwap64(value); +#endif +} + +inline uint16_t ToHost(uint16_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return value; +#else + return BSwap16(value); +#endif +} + +inline uint32_t ToHost(uint32_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return value; +#else + return BSwap32(value); +#endif +} + +inline uint64_t ToHost(uint64_t value) { +#if defined(PROTOBUF_BIG_ENDIAN) + return value; +#else + return BSwap64(value); +#endif +} + +} // namespace big_endian + +} // namespace internal +} // namespace protobuf +} // namespace google + +#include <google/protobuf/port_undef.inc> + +#endif // GOOGLE_PROTOBUF_ENDIAN_H__ |