Method findInStream

Engine/source/core/util/zip/centralDir.cpp:258–304

// [tom, 1/23/2007] Maybe.

bool EndOfCentralDir::findInStream(Stream *stream)
{
   U32 initialPos = stream->getPosition();
   U32 size = stream->getStreamSize();
   U32 pos;
   if(size == 0)
      return false;

   if(! stream->setPosition(size - mRecordSize))
      goto hell;

   U32 sig;
   stream->read(&sig);

   if(sig == mEOCDSignature)
   {
      stream->setPosition(size - mRecordSize);
      return true;
   }

   // OK, so we couldn't find the EOCD where we expected it. The zip file
   // either has comments or isn't a zip file. We need to search the last
   // 64Kb of the file for the EOCD.

   pos = size > mEOCDSearchSize ? size - mEOCDSearchSize : 0;
   if(! stream->setPosition(pos))
      goto hell;

   while(pos < (size - 4))
   {
      stream->read(&sig);

      if(sig == mEOCDSignature)
      {
         stream->setPosition(pos);
         return true;
      }

      pos++;
      if(! stream->setPosition(pos))
         goto hell;
   }

hell:
   stream->setPosition(initialPos);
   return false;
}

//-----------------------------------------------------------------------------