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Add support for MemoryBuffers that are not null terminated and add

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support for creating buffers that cover only a part of a file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127409 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2011-03-10 16:10:30 +00:00
parent be2e1b50c4
commit 7deb187736
4 changed files with 86 additions and 32 deletions
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6
lib/Support/Unix/Path.inc
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@ -869,18 +869,18 @@ Path::makeUnique(bool reuse_current, std::string* ErrMsg) {
return false;
}
const char *Path::MapInFilePages(int FD, uint64_t FileSize) {
const char *Path::MapInFilePages(int FD, size_t FileSize, off_t Offset) {
int Flags = MAP_PRIVATE;
#ifdef MAP_FILE
Flags |= MAP_FILE;
#endif
void *BasePtr = ::mmap(0, FileSize, PROT_READ, Flags, FD, 0);
void *BasePtr = ::mmap(0, FileSize, PROT_READ, Flags, FD, Offset);
if (BasePtr == MAP_FAILED)
return 0;
return (const char*)BasePtr;
}
void Path::UnMapFilePages(const char *BasePtr, uint64_t FileSize) {
void Path::UnMapFilePages(const char *BasePtr, size_t FileSize) {
::munmap((void*)BasePtr, FileSize);
}