6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
69 lines
2.5 KiB
C++
69 lines
2.5 KiB
C++
//===- SwapByteOrder.h - Generic and optimized byte swaps -------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares generic and optimized functions to swap the byte order of
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// an integral type.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_SWAPBYTEORDER_H
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#define LLVM_SUPPORT_SWAPBYTEORDER_H
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#include "llvm/ADT/STLForwardCompat.h"
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#include "llvm/ADT/bit.h"
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#include <cstdint>
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#include <type_traits>
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namespace llvm {
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namespace sys {
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constexpr bool IsBigEndianHost =
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llvm::endianness::native == llvm::endianness::big;
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static const bool IsLittleEndianHost = !IsBigEndianHost;
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inline unsigned char getSwappedBytes(unsigned char C) { return llvm::byteswap(C); }
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inline signed char getSwappedBytes( signed char C) { return llvm::byteswap(C); }
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inline char getSwappedBytes( char C) { return llvm::byteswap(C); }
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inline unsigned short getSwappedBytes(unsigned short C) { return llvm::byteswap(C); }
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inline signed short getSwappedBytes( signed short C) { return llvm::byteswap(C); }
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inline unsigned int getSwappedBytes(unsigned int C) { return llvm::byteswap(C); }
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inline signed int getSwappedBytes( signed int C) { return llvm::byteswap(C); }
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inline unsigned long getSwappedBytes(unsigned long C) { return llvm::byteswap(C); }
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inline signed long getSwappedBytes( signed long C) { return llvm::byteswap(C); }
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inline unsigned long long getSwappedBytes(unsigned long long C) { return llvm::byteswap(C); }
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inline signed long long getSwappedBytes( signed long long C) { return llvm::byteswap(C); }
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inline float getSwappedBytes(float C) {
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return llvm::bit_cast<float>(llvm::byteswap(llvm::bit_cast<uint32_t>(C)));
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}
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inline double getSwappedBytes(double C) {
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return llvm::bit_cast<double>(llvm::byteswap(llvm::bit_cast<uint64_t>(C)));
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}
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template <typename T>
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inline std::enable_if_t<std::is_enum_v<T>, T> getSwappedBytes(T C) {
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return static_cast<T>(llvm::byteswap(llvm::to_underlying(C)));
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}
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template<typename T>
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inline void swapByteOrder(T &Value) {
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Value = getSwappedBytes(Value);
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}
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} // end namespace sys
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} // end namespace llvm
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#endif
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