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MachOObject: Use DataExtractor's uleb parser instead of rolling our own.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143810 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2011-11-05 12:13:21 +00:00
parent c25c908977
commit ef56d1d35d
1 changed files with 11 additions and 22 deletions
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33
lib/Object/MachOObject.cpp
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@ -10,11 +10,12 @@
#include "llvm/Object/MachOObject.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/SwapByteOrder.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/SwapByteOrder.h"
using namespace llvm;
using namespace llvm::object;
@ -359,25 +360,13 @@ void MachOObject::ReadSymbol64TableEntry(uint64_t SymbolTableOffset,
void MachOObject::ReadULEB128s(uint64_t Index,
SmallVectorImpl<uint64_t> &Out) const {
const char *ptr = Buffer->getBufferStart() + Index;
uint64_t data = 0;
uint64_t delta = 0;
uint32_t shift = 0;
while (true) {
assert(ptr < Buffer->getBufferEnd() && "index out of bounds");
assert(shift < 64 && "too big for uint64_t");
DataExtractor extractor(Buffer->getBuffer(), true, 0);
uint8_t byte = *ptr++;
delta |= ((byte & 0x7F) << shift);
shift += 7;
if (byte < 0x80) {
if (delta == 0)
break;
data += delta;
Out.push_back(data);
delta = 0;
shift = 0;
}
uint32_t offset = Index;
uint64_t data = 0;
while (uint64_t delta = extractor.getULEB128(&offset)) {
data += delta;
Out.push_back(data);
}
}