llvm/lib/DebugInfo/CodeView/ModuleSubstream.cpp
Zachary Turner 5433d115a4 [PDB] General improvements to Stream library.
This adds various new functionality and cleanup surrounding the
use of the Stream library.  Major changes include:

* Renaming of all classes for more consistency / meaningfulness
* Addition of some new methods for reading multiple values at once.
* Full suite of unit tests for reader / writer functionality.
* Full set of doxygen comments for all classes.
* Streams now store their own endianness.
* Fixed some bugs in a few of the classes that were discovered
  by the unit tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296215 91177308-0d34-0410-b5e6-96231b3b80d8
2017-02-25 00:44:30 +00:00

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//===- ModuleSubstream.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/CodeView/ModuleSubstream.h"
#include "llvm/DebugInfo/MSF/BinaryStreamReader.h"
using namespace llvm;
using namespace llvm::codeview;
ModuleSubstream::ModuleSubstream() : Kind(ModuleSubstreamKind::None) {}
ModuleSubstream::ModuleSubstream(ModuleSubstreamKind Kind, BinaryStreamRef Data)
: Kind(Kind), Data(Data) {}
Error ModuleSubstream::initialize(BinaryStreamRef Stream,
ModuleSubstream &Info) {
const ModuleSubsectionHeader *Header;
BinaryStreamReader Reader(Stream);
if (auto EC = Reader.readObject(Header))
return EC;
ModuleSubstreamKind Kind =
static_cast<ModuleSubstreamKind>(uint32_t(Header->Kind));
if (auto EC = Reader.readStreamRef(Info.Data, Header->Length))
return EC;
Info.Kind = Kind;
return Error::success();
}
uint32_t ModuleSubstream::getRecordLength() const {
return sizeof(ModuleSubsectionHeader) + Data.getLength();
}
ModuleSubstreamKind ModuleSubstream::getSubstreamKind() const { return Kind; }
BinaryStreamRef ModuleSubstream::getRecordData() const { return Data; }