ext/mbstring/libmbfl/filters/mbfilter

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This source file includes following definitions.
mbfl_filt_conv_sjis_wchar
mbfl_filt_conv_wchar_sjis
mbfl_filt_ident_sjis
   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_ja.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_sjis.h"
  36 
  37 #define UNICODE_TABLE_CP932_DEF
  38 #define UNICODE_TABLE_JIS_DEF
  39 
  40 #include "unicode_table_cp932_ext.h"
  41 #include "unicode_table_jis.h"
  42 
  43 int mbfl_filt_ident_sjis(int c, mbfl_identify_filter *filter);
  44 
  45 const unsigned char mblen_table_sjis[] = { /* 0x80-0x9f,0xE0-0xFF */
  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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  52   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  53   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  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   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  57   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  58   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  59   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  60   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  61   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
  62 };
  63 
  64 static const char *mbfl_encoding_sjis_aliases[] = {"x-sjis", "SHIFT-JIS", NULL};
  65 
  66 const mbfl_encoding mbfl_encoding_sjis = {
  67         mbfl_no_encoding_sjis,
  68         "SJIS",
  69         "Shift_JIS",
  70         (const char *(*)[])&mbfl_encoding_sjis_aliases,
  71         mblen_table_sjis,
  72         MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
  73 };
  74 
  75 const struct mbfl_identify_vtbl vtbl_identify_sjis = {
  76         mbfl_no_encoding_sjis,
  77         mbfl_filt_ident_common_ctor,
  78         mbfl_filt_ident_common_dtor,
  79         mbfl_filt_ident_sjis
  80 };
  81 
  82 const struct mbfl_convert_vtbl vtbl_sjis_wchar = {
  83         mbfl_no_encoding_sjis,
  84         mbfl_no_encoding_wchar,
  85         mbfl_filt_conv_common_ctor,
  86         mbfl_filt_conv_common_dtor,
  87         mbfl_filt_conv_sjis_wchar,
  88         mbfl_filt_conv_common_flush
  89 };
  90 
  91 const struct mbfl_convert_vtbl vtbl_wchar_sjis = {
  92         mbfl_no_encoding_wchar,
  93         mbfl_no_encoding_sjis,
  94         mbfl_filt_conv_common_ctor,
  95         mbfl_filt_conv_common_dtor,
  96         mbfl_filt_conv_wchar_sjis,
  97         mbfl_filt_conv_common_flush
  98 };
  99 
 100 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
 101 
 102 #define SJIS_ENCODE(c1,c2,s1,s2)        \
 103                 do {                                            \
 104                         s1 = c1;                                \
 105                         s1--;                                   \
 106                         s1 >>= 1;                               \
 107                         if ((c1) < 0x5f) {              \
 108                                 s1 += 0x71;                     \
 109                         } else {                                \
 110                                 s1 += 0xb1;                     \
 111                         }                                               \
 112                         s2 = c2;                                \
 113                         if ((c1) & 1) {                 \
 114                                 if ((c2) < 0x60) {      \
 115                                         s2--;                   \
 116                                 }                                       \
 117                                 s2 += 0x20;                     \
 118                         } else {                                \
 119                                 s2 += 0x7e;                     \
 120                         }                                               \
 121                 } while (0)
 122 
 123 #define SJIS_DECODE(c1,c2,s1,s2)        \
 124                 do {                                            \
 125                         s1 = c1;                                \
 126                         if (s1 < 0xa0) {                \
 127                                 s1 -= 0x81;                     \
 128                         } else {                                \
 129                                 s1 -= 0xc1;                     \
 130                         }                                               \
 131                         s1 <<= 1;                               \
 132                         s1 += 0x21;                             \
 133                         s2 = c2;                                \
 134                         if (s2 < 0x9f) {                \
 135                                 if (s2 < 0x7f) {        \
 136                                         s2++;                   \
 137                                 }                                       \
 138                                 s2 -= 0x20;                     \
 139                         } else {                                \
 140                                 s1++;                           \
 141                                 s2 -= 0x7e;                     \
 142                         }                                               \
 143                 } while (0)
 144 
 145 
 146 /*
 147  * SJIS => wchar
 148  */
 149 int
 150 mbfl_filt_conv_sjis_wchar(int c, mbfl_convert_filter *filter)
 151 {
 152         int c1, s1, s2, w;
 153 
 154         switch (filter->status) {
 155         case 0:
 156                 if (c >= 0 && c < 0x80) {       /* latin */
 157                         CK((*filter->output_function)(c, filter->data));
 158                 } else if (c > 0xa0 && c < 0xe0) {      /* kana */
 159                         CK((*filter->output_function)(0xfec0 + c, filter->data));
 160                 } else if (c > 0x80 && c < 0xfd && c != 0xa0) { /* kanji first char */
 161                         filter->status = 1;
 162                         filter->cache = c;
 163                 } else {
 164                         w = c & MBFL_WCSGROUP_MASK;
 165                         w |= MBFL_WCSGROUP_THROUGH;
 166                         CK((*filter->output_function)(w, filter->data));
 167                 }
 168                 break;
 169 
 170         case 1:         /* kanji second char */
 171                 filter->status = 0;
 172                 c1 = filter->cache;
 173                 if (c >= 0x40 && c <= 0xfc && c != 0x7f) {
 174                         SJIS_DECODE(c1, c, s1, s2);
 175                         w = (s1 - 0x21)*94 + s2 - 0x21;
 176                         if (w >= 0 && w < jisx0208_ucs_table_size) {
 177                                 w = jisx0208_ucs_table[w];
 178                         } else {
 179                                 w = 0;
 180                         }
 181                         if (w <= 0) {
 182                                 if (s1 < 0x7f && s2 < 0x7f) {
 183                                         w = (s1 << 8) | s2;
 184                                         w &= MBFL_WCSPLANE_MASK;
 185                                         w |= MBFL_WCSPLANE_JIS0208;
 186                                 } else {
 187                                         w = (c1 << 8) | c;
 188                                         w &= MBFL_WCSGROUP_MASK;
 189                                         w |= MBFL_WCSGROUP_THROUGH;
 190                                 }
 191                         }
 192                         CK((*filter->output_function)(w, filter->data));
 193                 } else if ((c >= 0 && c < 0x21) || c == 0x7f) {         /* CTLs */
 194                         CK((*filter->output_function)(c, filter->data));
 195                 } else {
 196                         w = (c1 << 8) | c;
 197                         w &= MBFL_WCSGROUP_MASK;
 198                         w |= MBFL_WCSGROUP_THROUGH;
 199                         CK((*filter->output_function)(w, filter->data));
 200                 }
 201                 break;
 202 
 203         default:
 204                 filter->status = 0;
 205                 break;
 206         }
 207 
 208         return c;
 209 }
 210 
 211 /*
 212  * wchar => SJIS
 213  */
 214 int
 215 mbfl_filt_conv_wchar_sjis(int c, mbfl_convert_filter *filter)
 216 {
 217         int c1, c2, s1, s2;
 218 
 219         s1 = 0;
 220         if (c >= ucs_a1_jis_table_min && c < ucs_a1_jis_table_max) {
 221                 s1 = ucs_a1_jis_table[c - ucs_a1_jis_table_min];
 222         } else if (c >= ucs_a2_jis_table_min && c < ucs_a2_jis_table_max) {
 223                 s1 = ucs_a2_jis_table[c - ucs_a2_jis_table_min];
 224         } else if (c >= ucs_i_jis_table_min && c < ucs_i_jis_table_max) {
 225                 s1 = ucs_i_jis_table[c - ucs_i_jis_table_min];
 226         } else if (c >= ucs_r_jis_table_min && c < ucs_r_jis_table_max) {
 227                 s1 = ucs_r_jis_table[c - ucs_r_jis_table_min];
 228         }
 229         if (s1 <= 0) {
 230                 c1 = c & ~MBFL_WCSPLANE_MASK;
 231                 if (c1 == MBFL_WCSPLANE_JIS0208) {
 232                         s1 = c & MBFL_WCSPLANE_MASK;
 233                 } else if (c == 0xa5) {         /* YEN SIGN */
 234                         s1 = 0x216f;    /* FULLWIDTH YEN SIGN */
 235                 } else if (c == 0x203e) {       /* OVER LINE */
 236                         s1 = 0x2131;    /* FULLWIDTH MACRON */
 237                 } else if (c == 0xff3c) {       /* FULLWIDTH REVERSE SOLIDUS */
 238                         s1 = 0x2140;
 239                 } else if (c == 0xff5e) {       /* FULLWIDTH TILDE */
 240                         s1 = 0x2141;
 241                 } else if (c == 0x2225) {       /* PARALLEL TO */
 242                         s1 = 0x2142;
 243                 } else if (c == 0xff0d) {       /* FULLWIDTH HYPHEN-MINUS */
 244                         s1 = 0x215d;
 245                 } else if (c == 0xffe0) {       /* FULLWIDTH CENT SIGN */
 246                         s1 = 0x2171;
 247                 } else if (c == 0xffe1) {       /* FULLWIDTH POUND SIGN */
 248                         s1 = 0x2172;
 249                 } else if (c == 0xffe2) {       /* FULLWIDTH NOT SIGN */
 250                         s1 = 0x224c;
 251                 }
 252                 if (c == 0) {
 253                         s1 = 0;
 254                 } else if (s1 <= 0) {
 255                         s1 = -1;
 256                 }
 257         } else if (s1 >= 0x8080) {
 258                 s1 = -1;
 259         }
 260         if (s1 >= 0) {
 261                 if (s1 < 0x100) { /* latin or kana */
 262                         CK((*filter->output_function)(s1, filter->data));
 263                 } else { /* kanji */
 264                         c1 = (s1 >> 8) & 0xff;
 265                         c2 = s1 & 0xff;
 266                         SJIS_ENCODE(c1, c2, s1, s2);
 267                         CK((*filter->output_function)(s1, filter->data));
 268                         CK((*filter->output_function)(s2, filter->data));
 269                 }
 270         } else {
 271                 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
 272                         CK(mbfl_filt_conv_illegal_output(c, filter));
 273                 }
 274         }
 275 
 276         return c;
 277 }
 278 
 279 int mbfl_filt_ident_sjis(int c, mbfl_identify_filter *filter)
 280 {
 281         if (filter->status) {           /* kanji second char */
 282                 if (c < 0x40 || c > 0xfc || c == 0x7f) {        /* bad */
 283                     filter->flag = 1;
 284                 }
 285                 filter->status = 0;
 286         } else if (c >= 0 && c < 0x80) {        /* latin  ok */
 287                 ;
 288         } else if (c > 0xa0 && c < 0xe0) {      /* kana  ok */
 289                 ;
 290         } else if (c > 0x80 && c < 0xf0 && c != 0xa0) { /* kanji first char */
 291                 filter->status = 1;
 292         } else {                                                        /* bad */
 293                 filter->flag = 1;
 294         }
 295 
 296         return c;
 297 }
 298
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root/ext/mbstring/libmbfl/filters/mbfilter_sjis.c

DEFINITIONS
