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#pragma once
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif
//===- SwapByteOrder.h - Generic and optimized byte swaps -------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares generic and optimized functions to swap the byte order of
// an integral type.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_SWAPBYTEORDER_H
#define LLVM_SUPPORT_SWAPBYTEORDER_H
#include "llvm/ADT/bit.h"
#include <cstddef>
#include <cstdint>
#include <type_traits>
#if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__) || \
defined(__Fuchsia__) || defined(__EMSCRIPTEN__)
#include <endian.h>
#elif defined(_AIX)
#include <sys/machine.h>
#elif defined(__sun)
/* Solaris provides _BIG_ENDIAN/_LITTLE_ENDIAN selector in sys/types.h */
#include <sys/types.h>
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234
#if defined(_BIG_ENDIAN)
#define BYTE_ORDER BIG_ENDIAN
#else
#define BYTE_ORDER LITTLE_ENDIAN
#endif
#elif defined(__MVS__)
#define BIG_ENDIAN 4321
#define LITTLE_ENDIAN 1234
#define BYTE_ORDER BIG_ENDIAN
#else
#if !defined(BYTE_ORDER) && !defined(_WIN32)
#include <machine/endian.h>
#endif
#endif
namespace llvm {
/// ByteSwap_16 - This function returns a byte-swapped representation of
/// the 16-bit argument.
inline uint16_t ByteSwap_16(uint16_t value) { return llvm::byteswap(value); }
/// This function returns a byte-swapped representation of the 32-bit argument.
inline uint32_t ByteSwap_32(uint32_t value) { return llvm::byteswap(value); }
/// This function returns a byte-swapped representation of the 64-bit argument.
inline uint64_t ByteSwap_64(uint64_t value) { return llvm::byteswap(value); }
namespace sys {
#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
constexpr bool IsBigEndianHost = true;
#else
constexpr bool IsBigEndianHost = false;
#endif
static const bool IsLittleEndianHost = !IsBigEndianHost;
inline unsigned char getSwappedBytes(unsigned char C) { return llvm::byteswap(C); }
inline signed char getSwappedBytes( signed char C) { return llvm::byteswap(C); }
inline char getSwappedBytes( char C) { return llvm::byteswap(C); }
inline unsigned short getSwappedBytes(unsigned short C) { return llvm::byteswap(C); }
inline signed short getSwappedBytes( signed short C) { return llvm::byteswap(C); }
inline unsigned int getSwappedBytes(unsigned int C) { return llvm::byteswap(C); }
inline signed int getSwappedBytes( signed int C) { return llvm::byteswap(C); }
inline unsigned long getSwappedBytes(unsigned long C) { return llvm::byteswap(C); }
inline signed long getSwappedBytes( signed long C) { return llvm::byteswap(C); }
inline unsigned long long getSwappedBytes(unsigned long long C) { return llvm::byteswap(C); }
inline signed long long getSwappedBytes( signed long long C) { return llvm::byteswap(C); }
inline float getSwappedBytes(float C) {
union {
uint32_t i;
float f;
} in, out;
in.f = C;
out.i = llvm::byteswap(in.i);
return out.f;
}
inline double getSwappedBytes(double C) {
union {
uint64_t i;
double d;
} in, out;
in.d = C;
out.i = llvm::byteswap(in.i);
return out.d;
}
template <typename T>
inline std::enable_if_t<std::is_enum<T>::value, T> getSwappedBytes(T C) {
return static_cast<T>(
llvm::byteswap(static_cast<std::underlying_type_t<T>>(C)));
}
template<typename T>
inline void swapByteOrder(T &Value) {
Value = getSwappedBytes(Value);
}
} // end namespace sys
} // end namespace llvm
#endif
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
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