mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-22 20:43:44 +02:00
2269779262
Previously this change was submitted from a Windows machine, so changes made to the case of filenames and directory names did not survive the commit, and as a result the CMake source file names and the on-disk file names did not match on case-sensitive file systems. I'm resubmitting this patch from a Linux system, which hopefully allows the case changes to make it through unfettered. llvm-svn: 277213
94 lines
2.7 KiB
C++
94 lines
2.7 KiB
C++
//===- StreamReader.cpp - Reads bytes and objects from a stream -----------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/DebugInfo/MSF/StreamReader.h"
|
|
|
|
#include "llvm/DebugInfo/MSF/MSFError.h"
|
|
#include "llvm/DebugInfo/MSF/StreamRef.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::msf;
|
|
|
|
StreamReader::StreamReader(ReadableStreamRef S) : Stream(S), Offset(0) {}
|
|
|
|
Error StreamReader::readLongestContiguousChunk(ArrayRef<uint8_t> &Buffer) {
|
|
if (auto EC = Stream.readLongestContiguousChunk(Offset, Buffer))
|
|
return EC;
|
|
Offset += Buffer.size();
|
|
return Error::success();
|
|
}
|
|
|
|
Error StreamReader::readBytes(ArrayRef<uint8_t> &Buffer, uint32_t Size) {
|
|
if (auto EC = Stream.readBytes(Offset, Size, Buffer))
|
|
return EC;
|
|
Offset += Size;
|
|
return Error::success();
|
|
}
|
|
|
|
Error StreamReader::readInteger(uint16_t &Dest) {
|
|
const support::ulittle16_t *P;
|
|
if (auto EC = readObject(P))
|
|
return EC;
|
|
Dest = *P;
|
|
return Error::success();
|
|
}
|
|
|
|
Error StreamReader::readInteger(uint32_t &Dest) {
|
|
const support::ulittle32_t *P;
|
|
if (auto EC = readObject(P))
|
|
return EC;
|
|
Dest = *P;
|
|
return Error::success();
|
|
}
|
|
|
|
Error StreamReader::readZeroString(StringRef &Dest) {
|
|
uint32_t Length = 0;
|
|
// First compute the length of the string by reading 1 byte at a time.
|
|
uint32_t OriginalOffset = getOffset();
|
|
const char *C;
|
|
do {
|
|
if (auto EC = readObject(C))
|
|
return EC;
|
|
if (*C != '\0')
|
|
++Length;
|
|
} while (*C != '\0');
|
|
// Now go back and request a reference for that many bytes.
|
|
uint32_t NewOffset = getOffset();
|
|
setOffset(OriginalOffset);
|
|
|
|
ArrayRef<uint8_t> Data;
|
|
if (auto EC = readBytes(Data, Length))
|
|
return EC;
|
|
Dest = StringRef(reinterpret_cast<const char *>(Data.begin()), Data.size());
|
|
|
|
// Now set the offset back to where it was after we calculated the length.
|
|
setOffset(NewOffset);
|
|
return Error::success();
|
|
}
|
|
|
|
Error StreamReader::readFixedString(StringRef &Dest, uint32_t Length) {
|
|
ArrayRef<uint8_t> Bytes;
|
|
if (auto EC = readBytes(Bytes, Length))
|
|
return EC;
|
|
Dest = StringRef(reinterpret_cast<const char *>(Bytes.begin()), Bytes.size());
|
|
return Error::success();
|
|
}
|
|
|
|
Error StreamReader::readStreamRef(ReadableStreamRef &Ref) {
|
|
return readStreamRef(Ref, bytesRemaining());
|
|
}
|
|
|
|
Error StreamReader::readStreamRef(ReadableStreamRef &Ref, uint32_t Length) {
|
|
if (bytesRemaining() < Length)
|
|
return make_error<MSFError>(msf_error_code::insufficient_buffer);
|
|
Ref = Stream.slice(Offset, Length);
|
|
Offset += Length;
|
|
return Error::success();
|
|
}
|