zverse4.h

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/******************************************************************************
 *
 * zverse4.h -      class zVerse4: a helper class for module drivers
 *          which provide 4 byte size entries and use VerseKey
 *          for their entry keys
 *
 * $Id: zverse4.h 3786 2020-08-30 11:35:14Z scribe $
 *
 * Copyright 2000-2014 CrossWire Bible Society (http://www.crosswire.org)
 *  CrossWire Bible Society
 *  P. O. Box 2528
 *  Tempe, AZ  85280-2528
 *
 * 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 version 2.
 *
 * 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.
 *
 */


#ifndef ZVERSE4_H
#define ZVERSE4_H

#include <defs.h>

SWORD_NAMESPACE_START

class FileDesc;
class SWCompress;
class SWBuf;

class SWDLLEXPORT zVerse4 {

private:
    SWCompress *compressor;

protected:
    static int instance;        // number of instantiated zVerse4 objects or derivitives

    FileDesc *idxfp[2];
    FileDesc *textfp[2];
    FileDesc *compfp[2];
    char *path;
    void doSetText(char testmt, long idxoff, const char *buf, long len = 0);
    void doLinkEntry(char testmt, long destidxoff, long srcidxoff);
    void flushCache() const;
    mutable char *cacheBuf;
    mutable unsigned int cacheBufSize;
    mutable char cacheTestament;
    mutable long cacheBufIdx;
    mutable bool dirtyCache;

public:

#define VERSEBLOCKS 2
#define CHAPTERBLOCKS 3
#define BOOKBLOCKS 4

    static const char uniqueIndexID[];


    // fileMode default = RDONLY
    zVerse4(const char *ipath, int fileMode = -1, int blockType = CHAPTERBLOCKS, SWCompress * icomp = 0);
    virtual ~zVerse4();

    void findOffset(char testmt, long idxoff, long *start, unsigned long *size, unsigned long *buffnum) const;
    void zReadText(char testmt, long start, unsigned long size, unsigned long buffnum, SWBuf &buf) const;
    virtual void rawZFilter(SWBuf &buf, char direction = 0) const { (void) buf; (void) direction; }
    static char createModule(const char *path, int blockBound, const char *v11n = "KJV");
};

SWORD_NAMESPACE_END
#endif