Function hasValidBitcodeHeader

src/lib/Bitcode/Reader/BitcodeReader.cpp:110–121

Helper to read the header common to all bitcode files.

/// Helper to read the header common to all bitcode files.
static bool hasValidBitcodeHeader(BitstreamCursor &Stream) {
  // Sniff for the signature.
  if (!Stream.canSkipToPos(4) ||
      Stream.Read(8) != 'B' ||
      Stream.Read(8) != 'C' ||
      Stream.Read(4) != 0x0 ||
      Stream.Read(4) != 0xC ||
      Stream.Read(4) != 0xE ||
      Stream.Read(4) != 0xD)
    return false;
  return true;
}

static Expected<BitstreamCursor> initStream(MemoryBufferRef Buffer) {
  const unsigned char *BufPtr = (const unsigned char *)Buffer.getBufferStart();