1//===- FileWriter.cpp -------------------------------------------*- 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#include "llvm/DebugInfo/GSYM/FileWriter.h"
10#include "llvm/Support/LEB128.h"
11#include "llvm/Support/raw_ostream.h"
12#include <cassert>
13
14using namespace llvm;
15using namespace gsym;
16
17FileWriter::~FileWriter() { OS.flush(); }
18
19void FileWriter::writeSLEB(int64_t S) {
20  uint8_t Bytes[32];
21  auto Length = encodeSLEB128(S, Bytes);
22  assert(Length < sizeof(Bytes));
23  OS.write(reinterpret_cast<const char *>(Bytes), Length);
24}
25
26void FileWriter::writeULEB(uint64_t U) {
27  uint8_t Bytes[32];
28  auto Length = encodeULEB128(U, Bytes);
29  assert(Length < sizeof(Bytes));
30  OS.write(reinterpret_cast<const char *>(Bytes), Length);
31}
32
33void FileWriter::writeU8(uint8_t U) {
34  OS.write(reinterpret_cast<const char *>(&U), sizeof(U));
35}
36
37void FileWriter::writeU16(uint16_t U) {
38  const uint16_t Swapped = support::endian::byte_swap(U, ByteOrder);
39  OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped));
40}
41
42void FileWriter::writeU32(uint32_t U) {
43  const uint32_t Swapped = support::endian::byte_swap(U, ByteOrder);
44  OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped));
45}
46
47void FileWriter::writeU64(uint64_t U) {
48  const uint64_t Swapped = support::endian::byte_swap(U, ByteOrder);
49  OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped));
50}
51
52void FileWriter::fixup32(uint32_t U, uint64_t Offset) {
53  const uint32_t Swapped = support::endian::byte_swap(U, ByteOrder);
54  OS.pwrite(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped),
55            Offset);
56}
57
58void FileWriter::writeData(llvm::ArrayRef<uint8_t> Data) {
59  OS.write(reinterpret_cast<const char *>(Data.data()), Data.size());
60}
61
62void FileWriter::writeNullTerminated(llvm::StringRef Str) {
63  OS << Str << '\0';
64}
65
66uint64_t FileWriter::tell() {
67  return OS.tell();
68}
69
70void FileWriter::alignTo(size_t Align) {
71  off_t Offset = OS.tell();
72  off_t AlignedOffset = (Offset + Align - 1) / Align * Align;
73  if (AlignedOffset == Offset)
74    return;
75  off_t PadCount = AlignedOffset - Offset;
76  OS.write_zeros(PadCount);
77}
78