//===----------------------------------------------------------------------===//
MemoryBuffer *MemoryBuffer::getSTDIN(std::string *ErrStr) {
- char Buffer[4096*4];
-
- std::vector<char> FileData;
-
// Read in all of the data from stdin, we cannot mmap stdin.
//
// FIXME: That isn't necessarily true, we should try to mmap stdin and
// fallback if it fails.
sys::Program::ChangeStdinToBinary();
- size_t ReadBytes;
- do {
- ReadBytes = fread(Buffer, sizeof(char), sizeof(Buffer), stdin);
- FileData.insert(FileData.end(), Buffer, Buffer+ReadBytes);
- } while (ReadBytes == sizeof(Buffer));
- if (!feof(stdin)) {
- if (ErrStr) *ErrStr = "error reading from stdin";
- return 0;
- }
+ const ssize_t ChunkSize = 4096*4;
+ SmallString<ChunkSize> Buffer;
+ ssize_t ReadBytes;
+ // Read into Buffer until we hit EOF.
+ do {
+ Buffer.reserve(Buffer.size() + ChunkSize);
+ ReadBytes = read(0, Buffer.end(), ChunkSize);
+ if (ReadBytes == -1) {
+ if (errno == EINTR) continue;
+ if (ErrStr) *ErrStr = sys::StrError();
+ return 0;
+ }
+ Buffer.set_size(Buffer.size() + ReadBytes);
+ } while (ReadBytes != 0);
- return getMemBufferCopy(StringRef(&FileData[0], FileData.size()), "<stdin>");
+ return getMemBufferCopy(Buffer, "<stdin>");
}