utf8cantillation.cpp

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/******************************************************************************
 *
 *  utf8cantillation.cpp -  SWFilter descendant to remove UTF-8 Hebrew
 *              cantillation
 *
 * $Id: utf8cantillation.cpp 2980 2013-09-14 21:51:47Z scribe $
 *
 * Copyright 2001-2013 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.
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <utf8cantillation.h>


SWORD_NAMESPACE_START

namespace {

    static const char oName[] = "Hebrew Cantillation";
    static const char oTip[]  = "Toggles Hebrew Cantillation Marks";

    static const StringList *oValues() {
        static const SWBuf choices[3] = {"Off", "On", ""};
        static const StringList oVals(&choices[0], &choices[2]);
        return &oVals;
    }
}


UTF8Cantillation::UTF8Cantillation() : SWOptionFilter(oName, oTip, oValues()) {
}


UTF8Cantillation::~UTF8Cantillation(){};


char UTF8Cantillation::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
    if (!option) {
        //The UTF-8 range 0xD6 0x90 to 0xD6 0xAF and 0xD7 0x84 consist of Hebrew cantillation marks so block those out.
        SWBuf orig = text;
        const unsigned char* from = (unsigned char*)orig.c_str();
        for (text = ""; *from; from++) {
            if (*from != 0xD6) {
                if (*from == 0xD7 && *(from + 1) == 0x84) {
                    from++;
                }
                else {
                    text += *from;
                }
            }
            else if (*(from + 1) < 0x90 || *(from + 1) > 0xAF) {
                text += *from;
                from++;
                text += *from;
            }
            else {
                from++;
            }
        }
    }
    return 0;
}

SWORD_NAMESPACE_END