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// 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 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 <bit>
#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 std::byteswap(x);
#else
return x;
#endif
}
inline constexpr uint32_t NetToHost32(uint32_t x) {
#if defined(ARCH_CPU_LITTLE_ENDIAN)
return std::byteswap(x);
#else
return x;
#endif
}
inline constexpr uint64_t NetToHost64(uint64_t x) {
#if defined(ARCH_CPU_LITTLE_ENDIAN)
return std::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 std::byteswap(x);
#else
return x;
#endif
}
inline constexpr uint32_t HostToNet32(uint32_t x) {
#if defined(ARCH_CPU_LITTLE_ENDIAN)
return std::byteswap(x);
#else
return x;
#endif
}
inline constexpr uint64_t HostToNet64(uint64_t x) {
#if defined(ARCH_CPU_LITTLE_ENDIAN)
return std::byteswap(x);
#else
return x;
#endif
}
} // namespace base
#endif // BASE_SYS_BYTEORDER_H_
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