1//===- EndianStream.h - Stream ops with endian specific data ----*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines utilities for operating on streams that have endian
10// specific data.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef LLVM_SUPPORT_ENDIANSTREAM_H
15#define LLVM_SUPPORT_ENDIANSTREAM_H
16
17#include "llvm/ADT/ArrayRef.h"
18#include "llvm/Support/Endian.h"
19#include "llvm/Support/raw_ostream.h"
20
21namespace llvm {
22namespace support {
23
24namespace endian {
25
26template <typename value_type>
27inline void write(raw_ostream &os, value_type value, endianness endian) {
28  value = byte_swap<value_type>(value, endian);
29  os.write((const char *)&value, sizeof(value_type));
30}
31
32template <>
33inline void write<float>(raw_ostream &os, float value, endianness endian) {
34  write(os, FloatToBits(value), endian);
35}
36
37template <>
38inline void write<double>(raw_ostream &os, double value,
39                          endianness endian) {
40  write(os, DoubleToBits(value), endian);
41}
42
43template <typename value_type>
44inline void write(raw_ostream &os, ArrayRef<value_type> vals,
45                  endianness endian) {
46  for (value_type v : vals)
47    write(os, v, endian);
48}
49
50/// Adapter to write values to a stream in a particular byte order.
51struct Writer {
52  raw_ostream &OS;
53  endianness Endian;
54  Writer(raw_ostream &OS, endianness Endian) : OS(OS), Endian(Endian) {}
55  template <typename value_type> void write(ArrayRef<value_type> Val) {
56    endian::write(OS, Val, Endian);
57  }
58  template <typename value_type> void write(value_type Val) {
59    endian::write(OS, Val, Endian);
60  }
61};
62
63} // end namespace endian
64
65} // end namespace support
66} // end namespace llvm
67
68#endif
69