dialogue_file.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 TITANIC_DIALOGUE_FILE_H
#define TITANIC_DIALOGUE_FILE_H

#include "titanic/support/simple_file.h"
#include "titanic/support/string.h"

namespace Titanic {

struct DialogueIndexEntry {
    uint _v1, _offset;

    DialogueIndexEntry() : _v1(0), _offset(0) {}
    void load(Common::SeekableReadStream &s);
};

struct DialogueResource {
    bool _active;
    uint _offset, _bytesRead, _size;
    DialogueIndexEntry *_entryPtr;

    DialogueResource() : _active(false), _offset(0),
        _bytesRead(0), _size(0), _entryPtr(nullptr) {}

    size_t size() const { return _active ? _size : 0; }
};

class CDialogueFile {
private:
    File _file;
    Common::Array<DialogueIndexEntry> _index;
    Common::Array<DialogueResource> _cache;
private:
    DialogueResource *addToCache(int index);
public:
    CDialogueFile(const CString &filename, uint count);
    ~CDialogueFile();

    void clear();

    File *getFile() { return &_file; }

    DialogueResource *openTextEntry(int index) {
        return addToCache(index * 2);
    }

    DialogueResource *openWaveEntry(int index) {
        return addToCache(index * 2 + 1);
    }

    bool closeEntry(DialogueResource *cacheEntry);

    bool read(DialogueResource *cacheEntry, byte *buffer, size_t bytesToRead);
};

} // End of namespace Titanic

#endif /* TITANIC_TITLE_ENGINE_H */