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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef PSPSTREAM_H_
#define PSPSTREAM_H_

#include <pspkerneltypes.h>
#include "backends/platform/psp/powerman.h"
//#include "common/list.h"
#include "common/noncopyable.h"
#include "common/stream.h"
#include "common/str.h"

class PspIoStream final : public Common::SeekableReadStream, public Common::SeekableWriteStream, public Common::NonCopyable, public Suspendable {
protected:
    SceUID _handle;     // file handle
    Common::String _path;
    int _fileSize;
    bool _writeMode;    // for resuming in the right mode
    int _physicalPos;   // physical position in file
    int _pos;           // position. Sometimes virtual
    bool _eos;          // EOS flag

    enum {
        SuspendError = 2,
        ResumeError = 3
    };

    // debug stuff
    mutable int _error;     // file error state
    int _errorSuspend;          // for debugging
    mutable int _errorSource;
    int _errorPos;
    SceUID _errorHandle;
    int _suspendCount;

    bool physicalSeekFromCur(int32 offset);

public:

    static PspIoStream *makeFromPath(const Common::String &path, bool writeMode);

    PspIoStream(const Common::String &path, bool writeMode);
    ~PspIoStream() override;

    SceUID open();      // open the file pointed to by the file path

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

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

    int64 pos() const override;
    int64 size() const override;
    bool seek(int64 offs, int whence = SEEK_SET) override;
    uint32 read(void *dataPtr, uint32 dataSize) override;

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

#endif /* PSPSTREAM_H_ */