diff options
| -rw-r--r-- | backends/fs/psp/psp-stream.h | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/backends/fs/psp/psp-stream.h b/backends/fs/psp/psp-stream.h index 673630b685..9fd1ad0470 100644 --- a/backends/fs/psp/psp-stream.h +++ b/backends/fs/psp/psp-stream.h @@ -35,25 +35,39 @@ */ class PSPIoStream : public StdioStream, public Suspendable { protected: - Common::String _path; /* Need to maintain for reopening after suspend */ - bool _writeMode; /* "" */ - int _pos; /* "" */ - mutable int _ferror; /* Save file ferror */ - mutable bool _feof; /* and eof */ - + Common::String _path; + int _fileSize; + bool _writeMode; // for resuming in the right mode + int _physicalPos; // position in the real file + int _pos; // position. Sometimes virtual + bool _inCache; // whether we're in cache (virtual) mode + bool _eos; // EOS flag + enum { SuspendError = 2, ResumeError = 3 }; - int _errorSuspend; + enum { + CACHE_SIZE = 1024, + MIN_READ_SIZE = 1024 // reading less than 1024 takes exactly the same time as 1024 + }; + + // For caching + char *_cache; + int _cacheStartOffset; // starting offset of the cache. -1 when cache is invalid + + mutable int _ferror; // file error state + int _errorSuspend; // for debugging mutable int _errorSource; - - // Error checking int _errorPos; void * _errorHandle; int _suspendCount; + bool synchronizePhysicalPos(); // synchronize the physical and virtual positions + bool isOffsetInCache(uint32 pos); // check if an offset is found in cache + bool isCacheValid() { return _cacheStartOffset != -1; } + public: /** |