text: /*
   * "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 Moriyoshi Koizumi <moriyoshi@php.net> on 20 Dec 2002. The file
   * mbfilter.c is included in this package .
   *
   */
  
  #include <stddef.h>
  
  #include "mbfl_ident.h"
  #include "mbfilter_pass.h"
  #include "mbfilter_8bit.h"
  #include "mbfilter_wchar.h"
  
  #include "filters/mbfilter_euc_cn.h"
  #include "filters/mbfilter_hz.h"
  #include "filters/mbfilter_euc_tw.h"
  #include "filters/mbfilter_big5.h"
  #include "filters/mbfilter_uhc.h"
  #include "filters/mbfilter_euc_kr.h"
  #include "filters/mbfilter_iso2022_kr.h"
  #include "filters/mbfilter_sjis.h"
  #include "filters/mbfilter_sjis_open.h"
  #include "filters/mbfilter_sjis_mobile.h"
  #include "filters/mbfilter_jis.h"
  #include "filters/mbfilter_iso2022_jp_ms.h"
  #include "filters/mbfilter_iso2022jp_2004.h"
  #include "filters/mbfilter_iso2022jp_mobile.h"
  #include "filters/mbfilter_euc_jp.h"
  #include "filters/mbfilter_euc_jp_win.h"
  #include "filters/mbfilter_euc_jp_2004.h"
  #include "filters/mbfilter_utf8_mobile.h"
  #include "filters/mbfilter_ascii.h"
  #include "filters/mbfilter_koi8r.h"
  #include "filters/mbfilter_koi8u.h"
  #include "filters/mbfilter_cp866.h"
  #include "filters/mbfilter_cp932.h"
  #include "filters/mbfilter_cp936.h"
  #include "filters/mbfilter_cp1251.h"
  #include "filters/mbfilter_cp1252.h"
  #include "filters/mbfilter_cp1254.h"
  #include "filters/mbfilter_cp51932.h"
  #include "filters/mbfilter_cp5022x.h"
  #include "filters/mbfilter_gb18030.h"
  #include "filters/mbfilter_iso8859_1.h"
  #include "filters/mbfilter_iso8859_2.h"
  #include "filters/mbfilter_iso8859_3.h"
  #include "filters/mbfilter_iso8859_4.h"
  #include "filters/mbfilter_iso8859_5.h"
  #include "filters/mbfilter_iso8859_6.h"
  #include "filters/mbfilter_iso8859_7.h"
  #include "filters/mbfilter_iso8859_8.h"
  #include "filters/mbfilter_iso8859_9.h"
  #include "filters/mbfilter_iso8859_10.h"
  #include "filters/mbfilter_iso8859_13.h"
  #include "filters/mbfilter_iso8859_14.h"
  #include "filters/mbfilter_iso8859_15.h"
  #include "filters/mbfilter_base64.h"
  #include "filters/mbfilter_qprint.h"
  #include "filters/mbfilter_uuencode.h"
  #include "filters/mbfilter_7bit.h"
  #include "filters/mbfilter_utf7.h"
  #include "filters/mbfilter_utf7imap.h"
  #include "filters/mbfilter_utf8.h"
  #include "filters/mbfilter_utf16.h"
  #include "filters/mbfilter_utf32.h"
  #include "filters/mbfilter_byte2.h"
  #include "filters/mbfilter_byte4.h"
  #include "filters/mbfilter_ucs4.h"
  #include "filters/mbfilter_ucs2.h"
  #include "filters/mbfilter_htmlent.h"
  #include "filters/mbfilter_armscii8.h"
  #include "filters/mbfilter_cp850.h"
  
  static const struct mbfl_identify_vtbl vtbl_identify_false = {
  	mbfl_no_encoding_pass,
  	mbfl_filt_ident_false_ctor,
  	mbfl_filt_ident_false
  };
  
  static const struct mbfl_identify_vtbl *mbfl_identify_filter_list[] = {
  	&vtbl_identify_utf8,
  	&vtbl_identify_utf7,
  	&vtbl_identify_ascii,
  	&vtbl_identify_eucjp,
  	&vtbl_identify_sjis,
  	&vtbl_identify_sjis_open,
  	&vtbl_identify_eucjpwin,
  	&vtbl_identify_eucjp2004,
  	&vtbl_identify_cp932,
  	&vtbl_identify_jis,
  	&vtbl_identify_2022jp,
  	&vtbl_identify_2022jpms,
  	&vtbl_identify_2022jp_2004,
  	&vtbl_identify_2022jp_kddi,
  	&vtbl_identify_cp51932,
  	&vtbl_identify_sjis_docomo,
  	&vtbl_identify_sjis_kddi,
  	&vtbl_identify_sjis_sb,
  	&vtbl_identify_utf8_docomo,
  	&vtbl_identify_utf8_kddi_a,
  	&vtbl_identify_utf8_kddi_b,
  	&vtbl_identify_utf8_sb,
  	&vtbl_identify_euccn,
  	&vtbl_identify_cp936,
  	&vtbl_identify_hz,
  	&vtbl_identify_euctw,
  	&vtbl_identify_big5,
  	&vtbl_identify_cp950,
  	&vtbl_identify_euckr,
  	&vtbl_identify_uhc,
  	&vtbl_identify_2022kr,
  	&vtbl_identify_cp1251,
  	&vtbl_identify_cp866,
  	&vtbl_identify_koi8r,
  	&vtbl_identify_koi8u,
  	&vtbl_identify_cp1252,
  	&vtbl_identify_cp1254,
  	&vtbl_identify_8859_1,
  	&vtbl_identify_8859_2,
  	&vtbl_identify_8859_3,
  	&vtbl_identify_8859_4,
  	&vtbl_identify_8859_5,
  	&vtbl_identify_8859_6,
  	&vtbl_identify_8859_7,
  	&vtbl_identify_8859_8,
  	&vtbl_identify_8859_9,
  	&vtbl_identify_8859_10,
  	&vtbl_identify_8859_13,
  	&vtbl_identify_8859_14,
  	&vtbl_identify_8859_15,
  	&vtbl_identify_armscii8,
  	&vtbl_identify_cp850,
  	&vtbl_identify_jis_ms,
  	&vtbl_identify_cp50220,
  	&vtbl_identify_cp50221,
  	&vtbl_identify_cp50222,
  	&vtbl_identify_gb18030,
  	&vtbl_identify_7bit,
  	&vtbl_identify_false,
  	NULL
  };
  
  const struct mbfl_identify_vtbl* mbfl_identify_filter_get_vtbl(enum mbfl_no_encoding encoding)
  {
  	const struct mbfl_identify_vtbl** vtbl;
  
  	for (vtbl = mbfl_identify_filter_list; *vtbl; vtbl++) {
  		if ((*vtbl)->encoding == encoding) {
  			return *vtbl;
  		}
  	}
  
  	return NULL;
  }
  
  mbfl_identify_filter *mbfl_identify_filter_new(enum mbfl_no_encoding encoding)
  {
  	mbfl_identify_filter *filter = emalloc(sizeof(mbfl_identify_filter));
  	mbfl_identify_filter_init(filter, encoding);
  	return filter;
  }
  
  mbfl_identify_filter *mbfl_identify_filter_new2(const mbfl_encoding *encoding)
  {
  	mbfl_identify_filter *filter = emalloc(sizeof(mbfl_identify_filter));
  	mbfl_identify_filter_init2(filter, encoding);
  	return filter;
  }
  
  void mbfl_identify_filter_init(mbfl_identify_filter *filter, enum mbfl_no_encoding encoding)
  {
  	const mbfl_encoding *enc = mbfl_no2encoding(encoding);
  	mbfl_identify_filter_init2(filter, enc ? enc : &mbfl_encoding_pass);
  }
  
  void mbfl_identify_filter_init2(mbfl_identify_filter *filter, const mbfl_encoding *encoding)
  {
  	filter->encoding = encoding;
  	filter->status = filter->flag = filter->score = 0;
  
  	/* setup the function table */
  	const struct mbfl_identify_vtbl *vtbl = mbfl_identify_filter_get_vtbl(filter->encoding->no_encoding);
  	if (vtbl == NULL) {
  		vtbl = &vtbl_identify_false;
  	}
  	filter->filter_ctor = vtbl->filter_ctor;
  	filter->filter_function = vtbl->filter_function;
  
  	(*filter->filter_ctor)(filter);
  }
  
  void mbfl_identify_filter_delete(mbfl_identify_filter *filter)
  {
  	efree(filter);
  }
  
  void mbfl_filt_ident_common_ctor(mbfl_identify_filter *filter)
  {
  	filter->status = filter->flag = 0;
  }
  
  /* A (useless) filter which says that _every_ string is invalid in a certain encoding.
   * Obviously, that cannot be true. Remove after all encodings have proper identify filters */
  int mbfl_filt_ident_false(int c, mbfl_identify_filter *filter)
  {
  	filter->flag = 1;	/* bad */
  	return c;
  }
  
  void mbfl_filt_ident_false_ctor(mbfl_identify_filter *filter)
  {
  	filter->status = 0;
  	filter->flag = 1;
  }
  
  /* For encodings in which _every_ possible input string is valid */
  int mbfl_filt_ident_true(int c, mbfl_identify_filter *filter)
  {
  	return c;
  }
  