Function getMemoryBufferForStream

ext/src/llvm/MemoryBuffer.cpp:224–241

}

static ErrorOr<std::unique_ptr<WritableMemoryBuffer>>
getMemoryBufferForStream(sys::fs::file_t FD, const Twine &BufferName) {
  const ssize_t ChunkSize = 4096*4;
  SmallString<ChunkSize> Buffer;
  // Read into Buffer until we hit EOF.
  for (;;) {
    Buffer.reserve(Buffer.size() + ChunkSize);
    Expected<size_t> ReadBytes = sys::fs::readNativeFile(
        FD, makeMutableArrayRef(Buffer.end(), ChunkSize));
    if (!ReadBytes)
      return errorToErrorCode(ReadBytes.takeError());
    if (*ReadBytes == 0)
      break;
    Buffer.set_size(Buffer.size() + *ReadBytes);
  }

  return getMemBufferCopyImpl(Buffer, BufferName);
}


ErrorOr<std::unique_ptr<MemoryBuffer>>