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Convert two uses if fstat with sys::fs::status.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186560 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2013-07-18 03:04:20 +00:00
parent 60f18ad8a5
commit 1ceefa6aa3
1 changed files with 13 additions and 14 deletions
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27
lib/Support/MemoryBuffer.cpp
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@ -283,12 +283,11 @@ static bool shouldUseMmap(int FD,
// FIXME: this chunk of code is duplicated, but it avoids a fstat when
// RequiresNullTerminator = false and MapSize != -1.
if (FileSize == size_t(-1)) {
struct stat FileInfo;
// TODO: This should use fstat64 when available.
if (fstat(FD, &FileInfo) == -1) {
return error_code(errno, posix_category());
}
FileSize = FileInfo.st_size;
sys::fs::file_status Status;
error_code EC = sys::fs::status(FD, Status);
if (EC)
return EC;
FileSize = Status.getSize();
}
// If we need a null terminator and the end of the map is inside the file,
@ -318,20 +317,20 @@ error_code MemoryBuffer::getOpenFile(int FD, const char *Filename,
// If we don't know the file size, use fstat to find out. fstat on an open
// file descriptor is cheaper than stat on a random path.
if (FileSize == uint64_t(-1)) {
struct stat FileInfo;
// TODO: This should use fstat64 when available.
if (fstat(FD, &FileInfo) == -1) {
return error_code(errno, posix_category());
}
sys::fs::file_status Status;
error_code EC = sys::fs::status(FD, Status);
if (EC)
return EC;
// If this not a file or a block device (e.g. it's a named pipe
// or character device), we can't trust the size. Create the memory
// buffer by copying off the stream.
if (!S_ISREG(FileInfo.st_mode) && !S_ISBLK(FileInfo.st_mode)) {
sys::fs::file_type Type = Status.type();
if (Type != sys::fs::file_type::regular_file &&
Type != sys::fs::file_type::block_file)
return getMemoryBufferForStream(FD, Filename, result);
}
FileSize = FileInfo.st_size;
FileSize = Status.getSize();
}
MapSize = FileSize;
}