/*
 * "streamable kanji code filter and converter"
 * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
 *
 * LICENSE NOTICES
 *
 * This file is part of "streamable kanji code filter and converter",
 * which is distributed under the terms of GNU Lesser General Public
 * License (version 2) as published by the Free Software Foundation.
 *
 * This software 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with "streamable kanji code filter and converter";
 * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
 * Suite 330, Boston, MA  02111-1307  USA
 *
 * The author of this file:
 *
 */
/*
 * The source code included in this files was separated from mbfilter.c
 * by rui hrokawa <hirokawa@php.net> on 8 aug 2011.
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "mbfilter.h"

#include "mbfilter_utf8_mobile.h"
#include "mbfilter_sjis_mobile.h"

extern int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter);
extern int mbfl_filt_conv_utf8_wchar_flush(mbfl_convert_filter *filter);

extern const unsigned char mblen_table_utf8[];

static const char *mbfl_encoding_utf8_docomo_aliases[] = {"UTF-8-DOCOMO", "UTF8-DOCOMO", NULL};
static const char *mbfl_encoding_utf8_kddi_a_aliases[] = {NULL};
static const char *mbfl_encoding_utf8_kddi_b_aliases[] = {"UTF-8-Mobile#KDDI", "UTF-8-KDDI", "UTF8-KDDI", NULL};
static const char *mbfl_encoding_utf8_sb_aliases[] = {"UTF-8-SOFTBANK", "UTF8-SOFTBANK", NULL};

const mbfl_encoding mbfl_encoding_utf8_docomo = {
	mbfl_no_encoding_utf8_docomo,
	"UTF-8-Mobile#DOCOMO",
	"UTF-8",
	(const char *(*)[])&mbfl_encoding_utf8_docomo_aliases,
	mblen_table_utf8,
	MBFL_ENCTYPE_MBCS,
	&vtbl_utf8_docomo_wchar,
	&vtbl_wchar_utf8_docomo
};

const mbfl_encoding mbfl_encoding_utf8_kddi_a = {
	mbfl_no_encoding_utf8_kddi_a,
	"UTF-8-Mobile#KDDI-A",
	"UTF-8",
	(const char *(*)[])&mbfl_encoding_utf8_kddi_a_aliases,
	mblen_table_utf8,
	MBFL_ENCTYPE_MBCS,
	&vtbl_utf8_kddi_a_wchar,
	&vtbl_wchar_utf8_kddi_a
};

const mbfl_encoding mbfl_encoding_utf8_kddi_b = {
	mbfl_no_encoding_utf8_kddi_b,
	"UTF-8-Mobile#KDDI-B",
	"UTF-8",
	(const char *(*)[])&mbfl_encoding_utf8_kddi_b_aliases,
	mblen_table_utf8,
	MBFL_ENCTYPE_MBCS,
	&vtbl_utf8_kddi_b_wchar,
	&vtbl_wchar_utf8_kddi_b
};

const mbfl_encoding mbfl_encoding_utf8_sb = {
	mbfl_no_encoding_utf8_sb,
	"UTF-8-Mobile#SOFTBANK",
	"UTF-8",
	(const char *(*)[])&mbfl_encoding_utf8_sb_aliases,
	mblen_table_utf8,
	MBFL_ENCTYPE_MBCS,
	&vtbl_utf8_sb_wchar,
	&vtbl_wchar_utf8_sb
};

const struct mbfl_identify_vtbl vtbl_identify_utf8_docomo = {
	mbfl_no_encoding_utf8_docomo,
	mbfl_filt_ident_common_ctor,
	mbfl_filt_ident_common_dtor,
	mbfl_filt_ident_utf8
};

const struct mbfl_identify_vtbl vtbl_identify_utf8_kddi_a = {
	mbfl_no_encoding_utf8_kddi_a,
	mbfl_filt_ident_common_ctor,
	mbfl_filt_ident_common_dtor,
	mbfl_filt_ident_utf8
};

const struct mbfl_identify_vtbl vtbl_identify_utf8_kddi_b = {
	mbfl_no_encoding_utf8_kddi_b,
	mbfl_filt_ident_common_ctor,
	mbfl_filt_ident_common_dtor,
	mbfl_filt_ident_utf8
};

const struct mbfl_identify_vtbl vtbl_identify_utf8_sb = {
	mbfl_no_encoding_utf8_sb,
	mbfl_filt_ident_common_ctor,
	mbfl_filt_ident_common_dtor,
	mbfl_filt_ident_utf8
};

const struct mbfl_convert_vtbl vtbl_utf8_docomo_wchar = {
	mbfl_no_encoding_utf8_docomo,
	mbfl_no_encoding_wchar,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_utf8_mobile_wchar,
	mbfl_filt_conv_utf8_wchar_flush
};

const struct mbfl_convert_vtbl vtbl_wchar_utf8_docomo = {
	mbfl_no_encoding_wchar,
	mbfl_no_encoding_utf8_docomo,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_wchar_utf8_mobile,
	mbfl_filt_conv_common_flush
};

const struct mbfl_convert_vtbl vtbl_utf8_kddi_a_wchar = {
	mbfl_no_encoding_utf8_kddi_a,
	mbfl_no_encoding_wchar,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_utf8_mobile_wchar,
	mbfl_filt_conv_utf8_wchar_flush
};

const struct mbfl_convert_vtbl vtbl_wchar_utf8_kddi_a = {
	mbfl_no_encoding_wchar,
	mbfl_no_encoding_utf8_kddi_a,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_wchar_utf8_mobile,
	mbfl_filt_conv_common_flush
};

const struct mbfl_convert_vtbl vtbl_utf8_kddi_b_wchar = {
	mbfl_no_encoding_utf8_kddi_b,
	mbfl_no_encoding_wchar,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_utf8_mobile_wchar,
	mbfl_filt_conv_utf8_wchar_flush
};

const struct mbfl_convert_vtbl vtbl_wchar_utf8_kddi_b = {
	mbfl_no_encoding_wchar,
	mbfl_no_encoding_utf8_kddi_b,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_wchar_utf8_mobile,
	mbfl_filt_conv_common_flush
};

const struct mbfl_convert_vtbl vtbl_utf8_sb_wchar = {
	mbfl_no_encoding_utf8_sb,
	mbfl_no_encoding_wchar,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_utf8_mobile_wchar,
	mbfl_filt_conv_utf8_wchar_flush
};

const struct mbfl_convert_vtbl vtbl_wchar_utf8_sb = {
	mbfl_no_encoding_wchar,
	mbfl_no_encoding_utf8_sb,
	mbfl_filt_conv_common_ctor,
	mbfl_filt_conv_common_dtor,
	mbfl_filt_conv_wchar_utf8_mobile,
	mbfl_filt_conv_common_flush
};

#define CK(statement)	do { if ((statement) < 0) return (-1); } while (0)
int mbfl_filt_put_invalid_char(int c, mbfl_convert_filter *filter);

/*
 * UTF-8 => wchar
 */
int mbfl_filt_conv_utf8_mobile_wchar(int c, mbfl_convert_filter *filter)
{
	int s, s1 = 0, c1 = 0, snd = 0;

retry:
	switch (filter->status & 0xff) {
	case 0x00:
		if (c < 0x80) {
			CK((*filter->output_function)(c, filter->data));
		} else if (c >= 0xc2 && c <= 0xdf) { /* 2byte code first char: 0xc2-0xdf */
			filter->status = 0x10;
			filter->cache = c & 0x1f;
		} else if (c >= 0xe0 && c <= 0xef) { /* 3byte code first char: 0xe0-0xef */
			filter->status = 0x20;
			filter->cache = c & 0xf;
		} else if (c >= 0xf0 && c <= 0xf4) { /* 3byte code first char: 0xf0-0xf4 */
			filter->status = 0x30;
			filter->cache = c & 0x7;
		} else {
			CK(mbfl_filt_put_invalid_char(c, filter));
		}
		break;
	case 0x10: /* 2byte code 2nd char: 0x80-0xbf */
	case 0x21: /* 3byte code 3rd char: 0x80-0xbf */
	case 0x32: /* 4byte code 4th char: 0x80-0xbf */
		filter->status = 0;
		if (c >= 0x80 && c <= 0xbf) {
			s = (filter->cache<<6) | (c & 0x3f);
			filter->cache = 0;

			if (filter->from->no_encoding == mbfl_no_encoding_utf8_docomo &&
				mbfilter_conv_r_map_tbl(s, &s1, mbfl_docomo2uni_pua, 4) > 0) {
				s = mbfilter_sjis_emoji_docomo2unicode(s1, &snd);
			} else if (filter->from->no_encoding == mbfl_no_encoding_utf8_kddi_a &&
					   mbfilter_conv_r_map_tbl(s, &s1, mbfl_kddi2uni_pua, 7) > 0) {
				s = mbfilter_sjis_emoji_kddi2unicode(s1, &snd);
			} else if (filter->from->no_encoding == mbfl_no_encoding_utf8_kddi_b &&
					   mbfilter_conv_r_map_tbl(s, &s1, mbfl_kddi2uni_pua_b, 8) > 0) {
				s = mbfilter_sjis_emoji_kddi2unicode(s1, &snd);
			} else if (filter->from->no_encoding == mbfl_no_encoding_utf8_sb &&
					   mbfilter_conv_r_map_tbl(s, &s1, mbfl_sb2uni_pua, 6) > 0) {
				s = mbfilter_sjis_emoji_sb2unicode(s1, &snd);
			}

			if (snd > 0) {
				CK((*filter->output_function)(snd, filter->data));
			}
			CK((*filter->output_function)(s, filter->data));
		} else {
			CK(mbfl_filt_put_invalid_char(filter->cache, filter));
			goto retry;
		}
		break;
	case 0x20: /* 3byte code 2nd char: 0:0xa0-0xbf,D:0x80-9F,1-C,E-F:0x80-0x9f */
		s = (filter->cache<<6) | (c & 0x3f);
		c1 = filter->cache & 0xf;

		if ((c >= 0x80 && c <= 0xbf) &&
			((c1 == 0x0 && c >= 0xa0) ||
			 (c1 == 0xd && c < 0xa0) ||
			 (c1 > 0x0 && c1 != 0xd))) {
			filter->cache = s;
			filter->status++;
		} else {
			CK(mbfl_filt_put_invalid_char(filter->cache, filter));
			goto retry;
		}
		break;
	case 0x30: /* 4byte code 2nd char: 0:0x90-0xbf,1-3:0x80-0xbf,4:0x80-0x8f */
		s = (filter->cache<<6) | (c & 0x3f);
		c1 = filter->cache & 0x7;

		if ((c >= 0x80 && c <= 0xbf) &&
			((c1 == 0x0 && c >= 0x90) ||
			 (c1 == 0x4 && c < 0x90) ||
			 (c1 > 0x0 && c1 != 0x4))) {
			filter->cache = s;
			filter->status++;
		} else {
			CK(mbfl_filt_put_invalid_char(filter->cache, filter));
			goto retry;
		}
		break;
	case 0x31: /* 4byte code 3rd char: 0x80-0xbf */
		if (c >= 0x80 && c <= 0xbf) {
			filter->cache = (filter->cache<<6) | (c & 0x3f);
			filter->status++;
		} else {
			CK(mbfl_filt_put_invalid_char(filter->cache, filter));
			goto retry;
		}
		break;
	default:
		filter->status = 0;
		break;
	}

	return c;
}

/*
 * wchar => UTF-8
 */
int mbfl_filt_conv_wchar_utf8_mobile(int c, mbfl_convert_filter *filter)
{
	if (c >= 0 && c < 0x110000) {
		int s1, c1;

		if ((filter->to->no_encoding == mbfl_no_encoding_utf8_docomo &&
			 mbfilter_unicode2sjis_emoji_docomo(c, &s1, filter) > 0 &&
			 mbfilter_conv_map_tbl(s1, &c1, mbfl_docomo2uni_pua, 4) > 0) ||
			(filter->to->no_encoding == mbfl_no_encoding_utf8_kddi_a &&
			 mbfilter_unicode2sjis_emoji_kddi(c, &s1, filter) > 0 &&
			 mbfilter_conv_map_tbl(s1, &c1, mbfl_kddi2uni_pua, 7) > 0) ||
			(filter->to->no_encoding == mbfl_no_encoding_utf8_kddi_b &&
			 mbfilter_unicode2sjis_emoji_kddi(c, &s1, filter) > 0 &&
			 mbfilter_conv_map_tbl(s1, &c1, mbfl_kddi2uni_pua_b, 8) > 0) ||
			(filter->to->no_encoding == mbfl_no_encoding_utf8_sb &&
			 mbfilter_unicode2sjis_emoji_sb(c, &s1, filter) > 0 &&
			 mbfilter_conv_map_tbl(s1, &c1, mbfl_sb2uni_pua, 6) > 0)) {
			c = c1;
		}

		if (filter->status == 1 && filter->cache > 0) {
			return c;
		}

		if (c < 0x80) {
			CK((*filter->output_function)(c, filter->data));
		} else if (c < 0x800) {
			CK((*filter->output_function)(((c >> 6) & 0x1f) | 0xc0, filter->data));
			CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
		} else if (c < 0x10000) {
			CK((*filter->output_function)(((c >> 12) & 0x0f) | 0xe0, filter->data));
			CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
			CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
		} else {
			CK((*filter->output_function)(((c >> 18) & 0x07) | 0xf0, filter->data));
			CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
			CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
			CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
		}
	} else {
		CK(mbfl_filt_conv_illegal_output(c, filter));
	}

	return c;
}
