ext/mbstring/libmbfl/filters/mbfilter

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This source file includes following definitions.
mbfl_filt_conv_cp936_wchar
mbfl_filt_conv_wchar_cp936
mbfl_filt_ident_cp936
   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_cn.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_cp936.h"
  36 #define UNICODE_TABLE_CP936_DEF
  37 #include "unicode_table_cp936.h"
  38 
  39 static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter);
  40 
  41 static const unsigned char mblen_table_cp936[] = { /* 0x81-0xFE */
  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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  51   2, 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, 2,
  57   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
  58 };
  59 
  60 static const char *mbfl_encoding_cp936_aliases[] = {"CP-936", "GBK", NULL};
  61 
  62 const mbfl_encoding mbfl_encoding_cp936 = {
  63         mbfl_no_encoding_cp936,
  64         "CP936",
  65         "CP936",
  66         (const char *(*)[])&mbfl_encoding_cp936_aliases,
  67         mblen_table_cp936,
  68         MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
  69 };
  70 
  71 const struct mbfl_identify_vtbl vtbl_identify_cp936 = {
  72         mbfl_no_encoding_cp936,
  73         mbfl_filt_ident_common_ctor,
  74         mbfl_filt_ident_common_dtor,
  75         mbfl_filt_ident_cp936
  76 };
  77 
  78 const struct mbfl_convert_vtbl vtbl_cp936_wchar = {
  79         mbfl_no_encoding_cp936,
  80         mbfl_no_encoding_wchar,
  81         mbfl_filt_conv_common_ctor,
  82         mbfl_filt_conv_common_dtor,
  83         mbfl_filt_conv_cp936_wchar,
  84         mbfl_filt_conv_common_flush
  85 };
  86 
  87 const struct mbfl_convert_vtbl vtbl_wchar_cp936 = {
  88         mbfl_no_encoding_wchar,
  89         mbfl_no_encoding_cp936,
  90         mbfl_filt_conv_common_ctor,
  91         mbfl_filt_conv_common_dtor,
  92         mbfl_filt_conv_wchar_cp936,
  93         mbfl_filt_conv_common_flush
  94 };
  95 
  96 
  97 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
  98 
  99 /*
 100  * CP936 => wchar
 101  */
 102 int
 103 mbfl_filt_conv_cp936_wchar(int c, mbfl_convert_filter *filter)
 104 {
 105         int k;
 106         int c1, c2, w = -1;
 107 
 108         switch (filter->status) {
 109         case 0:
 110                 if (c >= 0 && c < 0x80) {       /* latin */
 111                         CK((*filter->output_function)(c, filter->data));
 112                 } else if (c == 0x80) { /* euro sign */
 113                         CK((*filter->output_function)(0x20ac, filter->data));
 114                 } else if (c < 0xff) {  /* dbcs lead byte */
 115                         filter->status = 1;
 116                         filter->cache = c;
 117                 } else { /* 0xff */
 118                         CK((*filter->output_function)(0xf8f5, filter->data));
 119                 }
 120                 break;
 121 
 122         case 1:         /* dbcs second byte */
 123                 filter->status = 0;
 124                 c1 = filter->cache;
 125 
 126                 if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) &&
 127                         (c >= 0xa1 && c <= 0xfe)) {
 128                         /* UDA part1,2: U+E000-U+E4C5 */
 129                         w = 94*(c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c - 0xa1) + 0xe000;
 130                         CK((*filter->output_function)(w, filter->data));
 131                 } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
 132                         /* UDA part3 : U+E4C6-U+E765*/
 133                         w = 96*(c1 - 0xa1) + c - (c >= 0x80 ? 0x41 : 0x40) + 0xe4c6;
 134                         CK((*filter->output_function)(w, filter->data));
 135                 }
 136 
 137                 c2 = (c1 << 8) | c;
 138 
 139                 if (w <= 0 &&
 140                         ((c2 >= 0xa2ab && c2 <= 0xa9f0 + (0xe80f-0xe801)) ||
 141                          (c2 >= 0xd7fa && c2 <= 0xd7fa + (0xe814-0xe810)) ||
 142                          (c2 >= 0xfe50 && c2 <= 0xfe80 + (0xe864-0xe844)))) {
 143                         for (k = 0; k < mbfl_cp936_pua_tbl_max; k++) {
 144                                 if (c2 >= mbfl_cp936_pua_tbl[k][2] &&
 145                                         c2 <= mbfl_cp936_pua_tbl[k][2] +
 146                                         mbfl_cp936_pua_tbl[k][1] -  mbfl_cp936_pua_tbl[k][0]) {
 147                                         w = c2 -  mbfl_cp936_pua_tbl[k][2] + mbfl_cp936_pua_tbl[k][0];
 148                                         CK((*filter->output_function)(w, filter->data));
 149                                         break;
 150                                 }
 151                         }
 152                 }
 153 
 154                 if (w <= 0) {
 155                         if (c1 < 0xff && c1 > 0x80 && c > 0x39 && c < 0xff && c != 0x7f) {
 156                                 w = (c1 - 0x81)*192 + (c - 0x40);
 157                                 if (w >= 0 && w < cp936_ucs_table_size) {
 158                                         w = cp936_ucs_table[w];
 159                                 } else {
 160                                         w = 0;
 161                                 }
 162                                 if (w <= 0) {
 163                                         w = (c1 << 8) | c;
 164                                         w &= MBFL_WCSPLANE_MASK;
 165                                         w |= MBFL_WCSPLANE_WINCP936;
 166                                 }
 167                                 CK((*filter->output_function)(w, filter->data));
 168                         } else if ((c >= 0 && c < 0x21) || c == 0x7f) {         /* CTLs */
 169                                 CK((*filter->output_function)(c, filter->data));
 170                         } else {
 171                                 w = (c1 << 8) | c;
 172                                 w &= MBFL_WCSGROUP_MASK;
 173                                 w |= MBFL_WCSGROUP_THROUGH;
 174                                 CK((*filter->output_function)(w, filter->data));
 175                         }
 176                 }
 177                 break;
 178 
 179         default:
 180                 filter->status = 0;
 181                 break;
 182         }
 183 
 184         return c;
 185 }
 186 
 187 /*
 188  * wchar => CP936
 189  */
 190 int
 191 mbfl_filt_conv_wchar_cp936(int c, mbfl_convert_filter *filter)
 192 {
 193         int k, k1, k2;
 194         int c1, s = 0;
 195 
 196         if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
 197                 /* U+0000 - U+0451 */
 198                 s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
 199         } else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
 200                 /* U+2000 - U+26FF */
 201                 if (c == 0x203e) {
 202                         s = 0xa3fe;
 203                 } else if (c == 0x2218) {
 204                         s = 0xa1e3;
 205                 } else if (c == 0x223c) {
 206                         s = 0xa1ab;
 207                 } else {
 208                         s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
 209                 }
 210         } else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
 211                 /* U+2F00 - U+33FF */
 212                 s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
 213         } else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
 214                 /* U+4D00-9FFF CJK Unified Ideographs (+ Extension A) */
 215                 s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
 216         } else if (c >= 0xe000 && c <= 0xe864) { /* PUA */
 217                 if (c < 0xe766) {
 218                         if (c < 0xe4c6) {
 219                                 c1 = c - 0xe000;
 220                                 s = (c1 % 94) + 0xa1; c1 /= 94;
 221                                 s |= (c1 < 0x06 ? c1 + 0xaa : c1 + 0xf2) << 8;
 222                         } else {
 223                                 c1 = c - 0xe4c6;
 224                                 s = ((c1 / 96) + 0xa1) << 8; c1 %= 96;
 225                                 s |= c1 + (c1 >= 0x3f ? 0x41 : 0x40);
 226                         }
 227                 } else {
 228                         /* U+E766..U+E864 */
 229                         k1 = 0; k2 = mbfl_cp936_pua_tbl_max;
 230                         while (k1 < k2) {
 231                                 k = (k1 + k2) >> 1;
 232                                 if (c < mbfl_cp936_pua_tbl[k][0]) {
 233                                         k2 = k;
 234                                 } else if (c > mbfl_cp936_pua_tbl[k][1]) {
 235                                         k1 = k + 1;
 236                                 } else {
 237                                         s = c - mbfl_cp936_pua_tbl[k][0] + mbfl_cp936_pua_tbl[k][2];
 238                                         break;
 239                                 }
 240                         }
 241                 }
 242         } else if (c == 0xf8f5) {
 243                 s = 0xff;
 244         } else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
 245                 /* U+F900-FA2F CJK Compatibility Ideographs */
 246                 s = ucs_ci_cp936_table[c - ucs_ci_cp936_table_min];
 247         } else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
 248                 s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
 249         } else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
 250                 s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min]; /* U+FE50-FE6F Small Form Variants */
 251         } else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
 252                 /* U+FF00-FFFF HW/FW Forms */
 253                 if (c == 0xff04) {
 254                         s = 0xa1e7;
 255                 } else if (c == 0xff5e) {
 256                         s = 0xa1ab;
 257                 } else if (c >= 0xff01 && c <= 0xff5d) {
 258                         s = c - 0xff01 + 0xa3a1;
 259                 } else if (c >= 0xffe0 && c <= 0xffe5) {
 260                         s = ucs_hff_s_cp936_table[c-0xffe0];
 261                 }
 262         }
 263         if (s <= 0) {
 264                 c1 = c & ~MBFL_WCSPLANE_MASK;
 265                 if (c1 == MBFL_WCSPLANE_WINCP936) {
 266                         s = c & MBFL_WCSPLANE_MASK;
 267                 }
 268                 if (c == 0) {
 269                         s = 0;
 270                 } else if (s <= 0) {
 271                         s = -1;
 272                 }
 273         }
 274         if (s >= 0) {
 275                 if (s <= 0x80 || s == 0xff) {   /* latin */
 276                         CK((*filter->output_function)(s, filter->data));
 277                 } else {
 278                         CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
 279                         CK((*filter->output_function)(s & 0xff, filter->data));
 280                 }
 281         } else {
 282                 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
 283                         CK(mbfl_filt_conv_illegal_output(c, filter));
 284                 }
 285         }
 286 
 287         return c;
 288 }
 289 
 290 static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter)
 291 {
 292         if (filter->status) {           /* kanji second char */
 293                 if (c < 0x40 || c > 0xfe || c == 0x7f) {        /* bad */
 294                     filter->flag = 1;
 295                 }
 296                 filter->status = 0;
 297         } else if (c >= 0 && c < 0x80) {        /* latin  ok */
 298                 ;
 299         } else if (c > 0x80 && c < 0xff) {      /* DBCS lead byte */
 300                 filter->status = 1;
 301         } else {                                                        /* bad */
 302                 filter->flag = 1;
 303         }
 304 
 305         return c;
 306 }
/* [<][>][^][v][top][bottom][index][help] */
root/ext/mbstring/libmbfl/filters/mbfilter_cp936.c

DEFINITIONS
