ext/mbstring/libmbfl/filters/mbfilter_euc

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This source file includes following definitions.
mbfl_filt_conv_euckr_wchar
mbfl_filt_conv_wchar_euckr
mbfl_filt_ident_euckr
   1 /*
   2  * "streamable kanji code filter and converter"
   3  * Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
   4  *
   5  * LICENSE NOTICES
   6  *
   7  * This file is part of "streamable kanji code filter and converter",
   8  * which is distributed under the terms of GNU Lesser General Public
   9  * License (version 2) as published by the Free Software Foundation.
  10  *
  11  * This software is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with "streamable kanji code filter and converter";
  18  * if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  19  * Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  * The author of this file:
  22  *
  23  */
  24 /*
  25  * The source code included in this files was separated from mbfilter_kr.c
  26  * by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
  27  *
  28  */
  29 
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33 
  34 #include "mbfilter.h"
  35 #include "mbfilter_euc_kr.h"
  36 #include "unicode_table_uhc.h"
  37 
  38 static int mbfl_filt_ident_euckr(int c, mbfl_identify_filter *filter);
  39 
  40 static const unsigned char mblen_table_euckr[] = { /* 0xA1-0xFE */
  41   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  42   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  43   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  44   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  45   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  46   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  47   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  48   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  49   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  50   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  51   1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  52   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  53   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  54   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  55   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  56   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
  57 };
  58 
  59 static const char *mbfl_encoding_euc_kr_aliases[] = {"EUC_KR", "eucKR", "x-euc-kr", NULL};
  60 
  61 const mbfl_encoding mbfl_encoding_euc_kr = {
  62         mbfl_no_encoding_euc_kr,
  63         "EUC-KR",
  64         "EUC-KR",
  65         (const char *(*)[])&mbfl_encoding_euc_kr_aliases,
  66         mblen_table_euckr,
  67         MBFL_ENCTYPE_MBCS
  68 };
  69 
  70 const struct mbfl_identify_vtbl vtbl_identify_euckr = {
  71         mbfl_no_encoding_euc_kr,
  72         mbfl_filt_ident_common_ctor,
  73         mbfl_filt_ident_common_dtor,
  74         mbfl_filt_ident_euckr
  75 };
  76 
  77 const struct mbfl_convert_vtbl vtbl_euckr_wchar = {
  78         mbfl_no_encoding_euc_kr,
  79         mbfl_no_encoding_wchar,
  80         mbfl_filt_conv_common_ctor,
  81         mbfl_filt_conv_common_dtor,
  82         mbfl_filt_conv_euckr_wchar,
  83         mbfl_filt_conv_common_flush
  84 };
  85 
  86 const struct mbfl_convert_vtbl vtbl_wchar_euckr = {
  87         mbfl_no_encoding_wchar,
  88         mbfl_no_encoding_euc_kr,
  89         mbfl_filt_conv_common_ctor,
  90         mbfl_filt_conv_common_dtor,
  91         mbfl_filt_conv_wchar_euckr,
  92         mbfl_filt_conv_common_flush
  93 };
  94 
  95 
  96 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
  97 
  98 /*
  99  * EUC-KR => wchar
 100  */
 101 int
 102 mbfl_filt_conv_euckr_wchar(int c, mbfl_convert_filter *filter)
 103 {
 104         int c1, w, flag;
 105 
 106         switch (filter->status) {
 107         case 0:
 108                 if (c >= 0 && c < 0x80) {       /* latin */
 109                         CK((*filter->output_function)(c, filter->data));
 110                 } else if (c > 0xa0 && c < 0xff && c != 0xc9) { /* dbcs lead byte */
 111                         filter->status = 1;
 112                         filter->cache = c;
 113                 } else {
 114                         w = c & MBFL_WCSGROUP_MASK;
 115                         w |= MBFL_WCSGROUP_THROUGH;
 116                         CK((*filter->output_function)(w, filter->data));
 117                 }
 118                 break;
 119 
 120         case 1:         /* dbcs second byte */
 121                 filter->status = 0;
 122                 c1 = filter->cache;
 123                 flag = 0;
 124                 if (c1 >= 0xa1 && c1 <= 0xc6) {
 125                         flag = 1;
 126                 } else if (c1 >= 0xc7 && c1 <= 0xfe && c1 != 0xc9) {
 127                         flag = 2;
 128                 }
 129                 if (flag > 0 && c >= 0xa1 && c <= 0xfe) {
 130                         if (flag == 1){ /* 1st: 0xa1..0xc6, 2nd: 0x41..0x7a, 0x81..0xfe */
 131                                 w = (c1 - 0xa1)*190 + (c - 0x41);
 132                                 if (w >= 0 && w < uhc2_ucs_table_size) {
 133                                         w = uhc2_ucs_table[w];
 134                                 } else {
 135                                         w = 0;
 136                                 }
 137                         } else { /* 1st: 0xc7..0xc8,0xca..0xfe, 2nd: 0xa1..0xfe */
 138                                 w = (c1 - 0xc7)*94 + (c - 0xa1);
 139                                 if (w >= 0 && w < uhc3_ucs_table_size) {
 140                                         w = uhc3_ucs_table[w];
 141                                 } else {
 142                                         w = 0;
 143                                 }
 144                         }
 145 
 146                         if (w <= 0) {
 147                                 w = (c1 << 8) | c;
 148                                 w &= MBFL_WCSPLANE_MASK;
 149                                 w |= MBFL_WCSPLANE_KSC5601;
 150                         }
 151                         CK((*filter->output_function)(w, filter->data));
 152                 } else if ((c >= 0 && c < 0x21) || c == 0x7f) {         /* CTLs */
 153                         CK((*filter->output_function)(c, filter->data));
 154                 } else {
 155                         w = (c1 << 8) | c;
 156                         w &= MBFL_WCSGROUP_MASK;
 157                         w |= MBFL_WCSGROUP_THROUGH;
 158                         CK((*filter->output_function)(w, filter->data));
 159                 }
 160                 break;
 161 
 162         default:
 163                 filter->status = 0;
 164                 break;
 165         }
 166 
 167         return c;
 168 }
 169 
 170 /*
 171  * wchar => EUC-KR
 172  */
 173 int
 174 mbfl_filt_conv_wchar_euckr(int c, mbfl_convert_filter *filter)
 175 {
 176         int c1, c2, s;
 177 
 178         s = 0;
 179 
 180         if (c >= ucs_a1_uhc_table_min && c < ucs_a1_uhc_table_max) {
 181                 s = ucs_a1_uhc_table[c - ucs_a1_uhc_table_min];
 182         } else if (c >= ucs_a2_uhc_table_min && c < ucs_a2_uhc_table_max) {
 183                 s = ucs_a2_uhc_table[c - ucs_a2_uhc_table_min];
 184         } else if (c >= ucs_a3_uhc_table_min && c < ucs_a3_uhc_table_max) {
 185                 s = ucs_a3_uhc_table[c - ucs_a3_uhc_table_min];
 186         } else if (c >= ucs_i_uhc_table_min && c < ucs_i_uhc_table_max) {
 187                 s = ucs_i_uhc_table[c - ucs_i_uhc_table_min];
 188         } else if (c >= ucs_s_uhc_table_min && c < ucs_s_uhc_table_max) {
 189                 s = ucs_s_uhc_table[c - ucs_s_uhc_table_min];
 190         } else if (c >= ucs_r1_uhc_table_min && c < ucs_r1_uhc_table_max) {
 191                 s = ucs_r1_uhc_table[c - ucs_r1_uhc_table_min];
 192         } else if (c >= ucs_r2_uhc_table_min && c < ucs_r2_uhc_table_max) {
 193                 s = ucs_r2_uhc_table[c - ucs_r2_uhc_table_min];
 194         }
 195 
 196         c1 = (s >> 8) & 0xff;
 197         c2 = s & 0xff;
 198         /* exclude UHC extension area */
 199         if (c1 < 0xa1 || c2 < 0xa1){
 200                 s = c;
 201         }
 202 
 203         if (s <= 0) {
 204                 c1 = c & ~MBFL_WCSPLANE_MASK;
 205                 if (c1 == MBFL_WCSPLANE_KSC5601) {
 206                         s = c & MBFL_WCSPLANE_MASK;
 207                 }
 208                 if (c == 0) {
 209                         s = 0;
 210                 } else if (s <= 0) {
 211                         s = -1;
 212                 }
 213         }
 214         if (s >= 0) {
 215                 if (s < 0x80) { /* latin */
 216                         CK((*filter->output_function)(s, filter->data));
 217                 } else {
 218                         CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
 219                         CK((*filter->output_function)(s & 0xff, filter->data));
 220                 }
 221         } else {
 222                 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
 223                         CK(mbfl_filt_conv_illegal_output(c, filter));
 224                 }
 225         }
 226 
 227         return c;
 228 }
 229 
 230 static int mbfl_filt_ident_euckr(int c, mbfl_identify_filter *filter)
 231 {
 232         switch (filter->status) {
 233         case  0:        /* latin */
 234                 if (c >= 0 && c < 0x80) {       /* ok */
 235                         ;
 236                 } else if (c > 0xa0 && c < 0xff) {      /* DBCS lead byte */
 237                         filter->status = 1;
 238                 } else {                                                        /* bad */
 239                         filter->flag = 1;
 240                 }
 241                 break;
 242 
 243         case  1:        /* got lead byte */
 244                 if (c < 0xa1 || c > 0xfe) {             /* bad */
 245                         filter->flag = 1;
 246                 }
 247                 filter->status = 0;
 248                 break;
 249 
 250         default:
 251                 filter->status = 0;
 252                 break;
 253         }
 254 
 255         return c;
 256 }
/* [<][>][^][v][top][bottom][index][help] */
root/ext/mbstring/libmbfl/filters/mbfilter_euc_kr.c

DEFINITIONS
