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psp-stream.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-1-0-0/backends/fs/psp/psp-stream.h $
 * $Id: psp-stream.h 44277 2009-09-23 20:31:23Z joostp $
 *
 */

#ifndef PSPSTREAM_H_
#define PSPSTREAM_H_

#include "backends/fs/stdiostream.h"
#include "backends/platform/psp/powerman.h"
#include "common/list.h"

/*
 *  Class to handle special suspend/resume needs of PSP IO Streams
 */
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 */

      enum {
            SuspendError = 2,
            ResumeError = 3
      };

      int _errorSuspend;
      mutable int _errorSource;
      
#ifdef __PSP_DEBUG_SUSPEND__  
      int _errorPos;
      void * _errorHandle;                
      int _suspendCount;
#endif /* __PSP_DEBUG_SUSPEND__ */  

public:
      /**
       * Given a path, invoke fopen on that path and wrap the result in a
       * PSPIoStream instance.
       */
      static PSPIoStream *makeFromPath(const Common::String &path, bool writeMode);

      PSPIoStream(const Common::String &path, bool writeMode);
      virtual ~PSPIoStream();

      void * open();          // open the file pointed to by the file path

      bool err() const;
      void clearErr();
      bool eos() const;

      virtual uint32 write(const void *dataPtr, uint32 dataSize);
      virtual bool flush();

      virtual int32 pos() const;
      virtual int32 size() const;
      virtual bool seek(int32 offs, int whence = SEEK_SET);
      virtual uint32 read(void *dataPtr, uint32 dataSize);

      int suspend();          /* Suspendable interface (power manager) */
      int resume();           /* " " */
};

#endif /* PSPSTREAM_H_ */

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