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_kr.c
   * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
   *
   */
  
  #include "mbfilter.h"
  #include "mbfilter_uhc.h"
  #define UNICODE_TABLE_UHC_DEF
  #include "unicode_table_uhc.h"
  
  static const unsigned char mblen_table_uhc[] = { /* 0x81-0xFE */
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
    1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
  };
  
  static const char *mbfl_encoding_uhc_aliases[] = {"CP949", NULL};
  
  const mbfl_encoding mbfl_encoding_uhc = {
  	mbfl_no_encoding_uhc,
  	"UHC",
  	"UHC",
  	mbfl_encoding_uhc_aliases,
  	mblen_table_uhc,
  	0,
  	&vtbl_uhc_wchar,
  	&vtbl_wchar_uhc
  };
  
  const struct mbfl_convert_vtbl vtbl_uhc_wchar = {
  	mbfl_no_encoding_uhc,
  	mbfl_no_encoding_wchar,
  	mbfl_filt_conv_common_ctor,
  	NULL,
  	mbfl_filt_conv_uhc_wchar,
  	mbfl_filt_conv_common_flush,
  	NULL,
  };
  
  const struct mbfl_convert_vtbl vtbl_wchar_uhc = {
  	mbfl_no_encoding_wchar,
  	mbfl_no_encoding_uhc,
  	mbfl_filt_conv_common_ctor,
  	NULL,
  	mbfl_filt_conv_wchar_uhc,
  	mbfl_filt_conv_common_flush,
  	NULL,
  };
  
  #define CK(statement)	do { if ((statement) < 0) return (-1); } while (0)
  
  /*
   * UHC => wchar
   */
  int
  mbfl_filt_conv_uhc_wchar(int c, mbfl_convert_filter *filter)
  {
  	int c1, w = 0, flag = 0;
  
  	switch (filter->status) {
  	case 0:
  		if (c >= 0 && c < 0x80) {	/* latin */
  			CK((*filter->output_function)(c, filter->data));
  		} else if (c > 0x80 && c < 0xff && c != 0xc9) {	/* dbcs lead byte */
  			filter->status = 1;
  			filter->cache = c;
  		} else {
  			w = c & MBFL_WCSGROUP_MASK;
  			w |= MBFL_WCSGROUP_THROUGH;
  			CK((*filter->output_function)(w, filter->data));
  		}
  		break;
  
  	case 1:		/* dbcs second byte */
  		filter->status = 0;
  		c1 = filter->cache;
  
  		if ( c1 >= 0x81 && c1 <= 0xa0){
  			w = (c1 - 0x81)*190 + (c - 0x41);
  			if (w >= 0 && w < uhc1_ucs_table_size) {
  				flag = 1;
  				w = uhc1_ucs_table[w];
  			} else {
  				w = 0;
  			}
  		} else if ( c1 >= 0xa1 && c1 <= 0xc6){
  			w = (c1 - 0xa1)*190 + (c - 0x41);
  			if (w >= 0 && w < uhc2_ucs_table_size) {
  				flag = 2;
  				w = uhc2_ucs_table[w];
  			} else {
  				w = 0;
  			}
  		} else if ( c1 >= 0xc7 && c1 <= 0xfe){
  			w = (c1 - 0xc7)*94 + (c - 0xa1);
  			if (w >= 0 && w < uhc3_ucs_table_size) {
  				flag = 3;
  				w = uhc3_ucs_table[w];
  			} else {
  				w = 0;
  			}
  		}
  		if (flag > 0){
  			if (w <= 0) {
  				w = (c1 << 8) | c;
  				w &= MBFL_WCSPLANE_MASK;
  				w |= MBFL_WCSPLANE_UHC;
  			}
  			CK((*filter->output_function)(w, filter->data));
  		} else {
  			if ((c >= 0 && c < 0x21) || c == 0x7f) {		/* CTLs */
  				CK((*filter->output_function)(c, filter->data));
  			} else {
  				w = (c1 << 8) | c;
  				w &= MBFL_WCSGROUP_MASK;
  				w |= MBFL_WCSGROUP_THROUGH;
  				CK((*filter->output_function)(w, filter->data));
  			}
  		}
  		break;
  
  	default:
  		filter->status = 0;
  		break;
  	}
  
  	return c;
  }
  
  /*
   * wchar => UHC
   */
  int
  mbfl_filt_conv_wchar_uhc(int c, mbfl_convert_filter *filter)
  {
  	int c1, s;
  
  	s = 0;
  	if (c >= ucs_a1_uhc_table_min && c < ucs_a1_uhc_table_max) {
  		s = ucs_a1_uhc_table[c - ucs_a1_uhc_table_min];
  	} else if (c >= ucs_a2_uhc_table_min && c < ucs_a2_uhc_table_max) {
  		s = ucs_a2_uhc_table[c - ucs_a2_uhc_table_min];
  	} else if (c >= ucs_a3_uhc_table_min && c < ucs_a3_uhc_table_max) {
  		s = ucs_a3_uhc_table[c - ucs_a3_uhc_table_min];
  	} else if (c >= ucs_i_uhc_table_min && c < ucs_i_uhc_table_max) {
  		s = ucs_i_uhc_table[c - ucs_i_uhc_table_min];
  	} else if (c >= ucs_s_uhc_table_min && c < ucs_s_uhc_table_max) {
  		s = ucs_s_uhc_table[c - ucs_s_uhc_table_min];
  	} else if (c >= ucs_r1_uhc_table_min && c < ucs_r1_uhc_table_max) {
  		s = ucs_r1_uhc_table[c - ucs_r1_uhc_table_min];
  	} else if (c >= ucs_r2_uhc_table_min && c < ucs_r2_uhc_table_max) {
  		s = ucs_r2_uhc_table[c - ucs_r2_uhc_table_min];
  	}
  	if (s <= 0) {
  		c1 = c & ~MBFL_WCSPLANE_MASK;
  		if (c1 == MBFL_WCSPLANE_UHC) {
  			s = c & MBFL_WCSPLANE_MASK;
  		}
  		if (c == 0) {
  			s = 0;
  		} else if (s <= 0) {
  			s = -1;
  		}
  	}
  	if (s >= 0) {
  		if (s < 0x80) {	/* latin */
  			CK((*filter->output_function)(s, filter->data));
  		} else {
  			CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
  			CK((*filter->output_function)(s & 0xff, filter->data));
  		}
  	} else {
  		CK(mbfl_filt_conv_illegal_output(c, filter));
  	}
  
  	return c;
  }
  