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Enhance MemoryBuffer to return error messages in strings if they occur.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36899 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2007-05-06 23:32:36 +00:00
parent c57ed8b298
commit 5499da8833
2 changed files with 25 additions and 9 deletions
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18
lib/Support/MemoryBuffer.cpp
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@ -113,7 +113,7 @@ class MemoryBufferMMapFile : public MemoryBuffer {
public:
MemoryBufferMMapFile() {}
bool open(const sys::Path &Filename);
bool open(const sys::Path &Filename, std::string *ErrStr);
virtual const char *getBufferIdentifier() const {
return File.path().c_str();
@ -123,13 +123,15 @@ public:
};
}
bool MemoryBufferMMapFile::open(const sys::Path &Filename) {
bool MemoryBufferMMapFile::open(const sys::Path &Filename,
std::string *ErrStr) {
// FIXME: This does an extra stat syscall to figure out the size, but we
// already know the size!
bool Failure = File.open(Filename);
bool Failure = File.open(Filename, sys::MappedFile::READ_ACCESS, ErrStr);
if (Failure) return true;
File.map();
if (!File.map(ErrStr))
return true;
size_t Size = File.size();
@ -161,11 +163,13 @@ MemoryBufferMMapFile::~MemoryBufferMMapFile() {
//===----------------------------------------------------------------------===//
MemoryBuffer *MemoryBuffer::getFile(const char *FilenameStart, unsigned FnSize,
int64_t FileSize) {
std::string *ErrStr, int64_t FileSize){
// FIXME: it would be nice if PathWithStatus didn't copy the filename into a
// temporary string. :(
sys::PathWithStatus P(FilenameStart, FnSize);
#if 1
MemoryBufferMMapFile *M = new MemoryBufferMMapFile();
if (!M->open(P))
if (!M->open(P, ErrStr))
return M;
delete M;
return 0;
@ -186,7 +190,7 @@ MemoryBuffer *MemoryBuffer::getFile(const char *FilenameStart, unsigned FnSize,
// If the file is larger than some threshold, use mmap, otherwise use 'read'.
if (FileSize >= 4096*4) {
MemoryBufferMMapFile *M = new MemoryBufferMMapFile();
if (!M->open(P))
if (!M->open(P, ErrStr))
return M;
delete M;
return 0;