| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // This header defines cross-platform ByteSwap() implementations for 16, 32 and |
| // 64-bit values, and NetToHostXX() / HostToNextXX() functions equivalent to |
| // the traditional ntohX() and htonX() functions. |
| // Use the functions defined here rather than using the platform-specific |
| // functions directly. |
| |
| #ifndef BASE_SYS_BYTEORDER_H_ |
| #define BASE_SYS_BYTEORDER_H_ |
| |
| #include <stdint.h> |
| |
| #include "base/numerics/byte_conversions.h" |
| #include "build/build_config.h" |
| |
| #if defined(COMPILER_MSVC) |
| #include <stdlib.h> |
| #endif |
| |
| namespace base { |
| |
| // Converts the bytes in |x| from network to host order (endianness), and |
| // returns the result. |
| inline constexpr uint16_t NetToHost16(uint16_t x) { |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| return ByteSwap(x); |
| #else |
| return x; |
| #endif |
| } |
| inline constexpr uint32_t NetToHost32(uint32_t x) { |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| return ByteSwap(x); |
| #else |
| return x; |
| #endif |
| } |
| inline constexpr uint64_t NetToHost64(uint64_t x) { |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| return ByteSwap(x); |
| #else |
| return x; |
| #endif |
| } |
| |
| // Converts the bytes in |x| from host to network order (endianness), and |
| // returns the result. |
| inline constexpr uint16_t HostToNet16(uint16_t x) { |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| return ByteSwap(x); |
| #else |
| return x; |
| #endif |
| } |
| inline constexpr uint32_t HostToNet32(uint32_t x) { |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| return ByteSwap(x); |
| #else |
| return x; |
| #endif |
| } |
| inline constexpr uint64_t HostToNet64(uint64_t x) { |
| #if defined(ARCH_CPU_LITTLE_ENDIAN) |
| return ByteSwap(x); |
| #else |
| return x; |
| #endif |
| } |
| |
| } // namespace base |
| |
| #endif // BASE_SYS_BYTEORDER_H_ |