Method openFileForRead

Engine/source/core/util/zip/zipArchive.cpp:731–822

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

Stream *ZipArchive::openFileForRead(const CentralDir *fileCD)
{
   if(mMode != Read && mMode != ReadWrite)
      return NULL;

   if((fileCD->mInternalFlags & (CDFileDeleted | CDFileOpen)) != 0)
      return NULL;

   Stream *stream = mStream;

   if(fileCD->mInternalFlags & CDFileDirty)
   {
      // File is dirty, we need to read from the temporary file
      for(S32 i = 0;i < mTempFiles.size();++i)
      {
         if(mTempFiles[i]->getCentralDir() == fileCD)
         {
            // Found the temporary file
            if(! mTempFiles[i]->rewind())
            {
               if(isVerbose())
                  Con::errorf("ZipArchive::openFile - %s: %s is dirty, but could not rewind temporary file?", mFilename ? mFilename : "<no filename>", fileCD->mFilename.c_str());
               return NULL;
            }

            stream = mTempFiles[i];
            break;
         }
      }

      if(stream == mStream)
      {
         if(isVerbose())
            Con::errorf("ZipArchive::openFile - %s: %s is dirty, but no temporary file found?", mFilename ? mFilename : "<no filename>", fileCD->mFilename.c_str());
         return NULL;
      }
   }
   else
   {
      // Read from the zip file directly
      if(! mStream->setPosition(fileCD->mLocalHeadOffset))
      {
         if(isVerbose())
            Con::errorf("ZipArchive::openFile - %s: Could not locate local header for file %s", mFilename ? mFilename : "<no filename>", fileCD->mFilename.c_str());
         return NULL;
      }

      FileHeader fh;
      if(! fh.read(mStream))
      {
         if(isVerbose())
            Con::errorf("ZipArchive::openFile - %s: Could not read local header for file %s", mFilename ? mFilename : "<no filename>", fileCD->mFilename.c_str());
         return NULL;
      }
   }

   Stream *attachTo = stream;
   U16 compMethod = fileCD->mCompressMethod;