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/******************************************************************************
*
* utf8bidireorder.cpp - SWFilter descendant to perform reordering of
* UTF-8 text to visual order according to the
* Unicode Bidirectional Algorithm (UBA)
*
* $Id: utf8bidireorder.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.
*
*/
#ifdef _ICU_
#include <stdlib.h>
#include <utilstr.h>
#include <utf8bidireorder.h>
#include <swbuf.h>
SWORD_NAMESPACE_START
UTF8BiDiReorder::UTF8BiDiReorder() : err(U_ZERO_ERROR) {
conv = ucnv_open("UTF-8", &err);
}
UTF8BiDiReorder::~UTF8BiDiReorder() {
ucnv_close(conv);
}
char UTF8BiDiReorder::processText(SWBuf &text, const SWKey *key, const SWModule *module)
{
UChar *ustr, *ustr2;
if ((unsigned long)key < 2) // hack, we're en(1)/de(0)ciphering
return -1;
int32_t len = text.length();
ustr = new UChar[len]; //each char could become a surrogate pair
// Convert UTF-8 string to UTF-16 (UChars)
len = ucnv_toUChars(conv, ustr, len, text.c_str(), -1, &err);
ustr2 = new UChar[len];
UBiDi* bidi = ubidi_openSized(len + 1, 0, &err);
ubidi_setPara(bidi, ustr, len, UBIDI_DEFAULT_RTL, NULL, &err);
len = ubidi_writeReordered(bidi, ustr2, len,
UBIDI_DO_MIRRORING | UBIDI_REMOVE_BIDI_CONTROLS, &err);
ubidi_close(bidi);
// len = ubidi_writeReverse(ustr, len, ustr2, len,
// UBIDI_DO_MIRRORING | UBIDI_REMOVE_BIDI_CONTROLS, &err);
text.setSize(text.size()*2);
len = ucnv_fromUChars(conv, text.getRawData(), text.size(), ustr2, len, &err);
text.setSize(len);
delete [] ustr2;
delete [] ustr;
return 0;
}
SWORD_NAMESPACE_END
#endif
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