/******************************************************************************
 *
 *  utf8scsu.cpp -	SWFilter descendant to convert UTF-8 to SCSU
 *
 * $Id$
 *
 * Copyright 2001-2014 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.
 *
 */

#ifdef _ICU_

#include <utf8scsu.h>
#include <swbuf.h>

SWORD_NAMESPACE_START


UTF8SCSU::UTF8SCSU() {
	// initialize SCSU converter
	scsuConv = ucnv_open("SCSU", &err);

	// initialize UTF-8 converter
	utf8Conv = ucnv_open("UTF-8", &err);
}

UTF8SCSU::~UTF8SCSU() {
         ucnv_close(scsuConv);
         ucnv_close(utf8Conv);
}

char UTF8SCSU::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
	if ((unsigned long)key < 2)	// hack, we're en(1)/de(0)ciphering
		return -1;

	err = U_ZERO_ERROR;
	icu::UnicodeString utf16Text(text.getRawData(), text.length(), utf8Conv, err);
	err = U_ZERO_ERROR;
	int32_t len = utf16Text.extract(text.getRawData(), text.size(), scsuConv, err);
	if (len > (int32_t)text.size()+1) {
		text.setSize(len+1);
		utf16Text.extract(text.getRawData(), text.size(), scsuConv, err);
	}

	return 0;
}

SWORD_NAMESPACE_END
#endif