vendor/llvm/llvm-trunk-r375505vendor/llvm

1 files changed, 78 insertions, 0 deletions

diff --git a/lib/DebugInfo/GSYM/FileWriter.cpp b/lib/DebugInfo/GSYM/FileWriter.cpp
new file mode 100644
index 000000000000..4b30dcb60a7b
--- /dev/null
+++ b/lib/DebugInfo/GSYM/FileWriter.cpp
@@ -0,0 +1,78 @@
+//===- FileWriter.cpp -------------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/GSYM/FileWriter.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cassert>
+
+using namespace llvm;
+using namespace gsym;
+
+FileWriter::~FileWriter() { OS.flush(); }
+
+void FileWriter::writeSLEB(int64_t S) {
+  uint8_t Bytes[32];
+  auto Length = encodeSLEB128(S, Bytes);
+  assert(Length < sizeof(Bytes));
+  OS.write(reinterpret_cast<const char *>(Bytes), Length);
+}
+
+void FileWriter::writeULEB(uint64_t U) {
+  uint8_t Bytes[32];
+  auto Length = encodeULEB128(U, Bytes);
+  assert(Length < sizeof(Bytes));
+  OS.write(reinterpret_cast<const char *>(Bytes), Length);
+}
+
+void FileWriter::writeU8(uint8_t U) {
+  OS.write(reinterpret_cast<const char *>(&U), sizeof(U));
+}
+
+void FileWriter::writeU16(uint16_t U) {
+  const uint16_t Swapped = support::endian::byte_swap(U, ByteOrder);
+  OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped));
+}
+
+void FileWriter::writeU32(uint32_t U) {
+  const uint32_t Swapped = support::endian::byte_swap(U, ByteOrder);
+  OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped));
+}
+
+void FileWriter::writeU64(uint64_t U) {
+  const uint64_t Swapped = support::endian::byte_swap(U, ByteOrder);
+  OS.write(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped));
+}
+
+void FileWriter::fixup32(uint32_t U, uint64_t Offset) {
+  const uint32_t Swapped = support::endian::byte_swap(U, ByteOrder);
+  OS.pwrite(reinterpret_cast<const char *>(&Swapped), sizeof(Swapped),
+            Offset);
+}
+
+void FileWriter::writeData(llvm::ArrayRef<uint8_t> Data) {
+  OS.write(reinterpret_cast<const char *>(Data.data()), Data.size());
+}
+
+void FileWriter::writeNullTerminated(llvm::StringRef Str) {
+  OS << Str << '\0';
+}
+
+uint64_t FileWriter::tell() {
+  return OS.tell();
+}
+
+void FileWriter::alignTo(size_t Align) {
+  off_t Offset = OS.tell();
+  off_t AlignedOffset = (Offset + Align - 1) / Align * Align;
+  if (AlignedOffset == Offset)
+    return;
+  off_t PadCount = AlignedOffset - Offset;
+  OS.write_zeros(PadCount);
+}