6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
//===- EndianStream.h - Stream ops with endian specific data ----*- 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 defines utilities for operating on streams that have endian
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// specific data.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ENDIANSTREAM_H
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#define LLVM_SUPPORT_ENDIANSTREAM_H
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/Support/Endian.h"
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#include "llvm/Support/raw_ostream.h"
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namespace llvm {
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namespace support {
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namespace endian {
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template <typename value_type>
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inline void write_array(raw_ostream &os, ArrayRef<value_type> values,
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endianness endian) {
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for (const auto orig : values) {
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value_type value = byte_swap<value_type>(orig, endian);
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os.write((const char *)&value, sizeof(value_type));
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}
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}
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template <typename value_type>
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inline void write(raw_ostream &os, value_type value, endianness endian) {
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value = byte_swap<value_type>(value, endian);
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os.write((const char *)&value, sizeof(value_type));
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}
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template <>
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inline void write<float>(raw_ostream &os, float value, endianness endian) {
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write(os, llvm::bit_cast<uint32_t>(value), endian);
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}
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template <>
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inline void write<double>(raw_ostream &os, double value,
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endianness endian) {
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write(os, llvm::bit_cast<uint64_t>(value), endian);
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}
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template <typename value_type>
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inline void write(raw_ostream &os, ArrayRef<value_type> vals,
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endianness endian) {
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for (value_type v : vals)
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write(os, v, endian);
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}
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template <typename value_type>
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inline void write(SmallVectorImpl<char> &Out, value_type V, endianness E) {
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V = byte_swap<value_type>(V, E);
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Out.append((const char *)&V, (const char *)&V + sizeof(value_type));
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}
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/// Adapter to write values to a stream in a particular byte order.
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struct Writer {
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raw_ostream &OS;
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endianness Endian;
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Writer(raw_ostream &OS, endianness Endian) : OS(OS), Endian(Endian) {}
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template <typename value_type> void write(ArrayRef<value_type> Val) {
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endian::write(OS, Val, Endian);
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}
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template <typename value_type> void write(value_type Val) {
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endian::write(OS, Val, Endian);
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}
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};
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} // end namespace endian
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} // end namespace support
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} // end namespace llvm
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#endif
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