ext/mbstring/libmbfl/filters/mbfilter

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This source file includes following definitions.
mbfl_filt_conv_uhc_wchar
mbfl_filt_conv_wchar_uhc
mbfl_filt_ident_uhc
   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_uhc.h"
  36 #define UNICODE_TABLE_UHC_DEF
  37 #include "unicode_table_uhc.h"
  38 
  39 static int mbfl_filt_ident_uhc(int c, mbfl_identify_filter *filter);
  40 
  41 static const unsigned char mblen_table_uhc[] = { /* 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_uhc_aliases[] = {"CP949", NULL};
  61 
  62 const mbfl_encoding mbfl_encoding_uhc = {
  63         mbfl_no_encoding_uhc,
  64         "UHC",
  65         "UHC",
  66         (const char *(*)[])&mbfl_encoding_uhc_aliases,
  67         mblen_table_uhc,
  68         MBFL_ENCTYPE_MBCS
  69 };
  70 
  71 const struct mbfl_identify_vtbl vtbl_identify_uhc = {
  72         mbfl_no_encoding_uhc,
  73         mbfl_filt_ident_common_ctor,
  74         mbfl_filt_ident_common_dtor,
  75         mbfl_filt_ident_uhc
  76 };
  77 
  78 const struct mbfl_convert_vtbl vtbl_uhc_wchar = {
  79         mbfl_no_encoding_uhc,
  80         mbfl_no_encoding_wchar,
  81         mbfl_filt_conv_common_ctor,
  82         mbfl_filt_conv_common_dtor,
  83         mbfl_filt_conv_uhc_wchar,
  84         mbfl_filt_conv_common_flush
  85 };
  86 
  87 const struct mbfl_convert_vtbl vtbl_wchar_uhc = {
  88         mbfl_no_encoding_wchar,
  89         mbfl_no_encoding_uhc,
  90         mbfl_filt_conv_common_ctor,
  91         mbfl_filt_conv_common_dtor,
  92         mbfl_filt_conv_wchar_uhc,
  93         mbfl_filt_conv_common_flush
  94 };
  95 
  96 #define CK(statement)   do { if ((statement) < 0) return (-1); } while (0)
  97 
  98 /*
  99  * UHC => wchar
 100  */
 101 int
 102 mbfl_filt_conv_uhc_wchar(int c, mbfl_convert_filter *filter)
 103 {
 104         int c1, w = 0, flag = 0;
 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 > 0x80 && 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 
 124                 if ( c1 >= 0x81 && c1 <= 0xa0){
 125                         w = (c1 - 0x81)*190 + (c - 0x41);
 126                         if (w >= 0 && w < uhc1_ucs_table_size) {
 127                                 flag = 1;
 128                                 w = uhc1_ucs_table[w];
 129                         } else {
 130                                 w = 0;
 131                         }
 132                 } else if ( c1 >= 0xa1 && c1 <= 0xc6){
 133                         w = (c1 - 0xa1)*190 + (c - 0x41);
 134                         if (w >= 0 && w < uhc2_ucs_table_size) {
 135                                 flag = 2;
 136                                 w = uhc2_ucs_table[w];
 137                         } else {
 138                                 w = 0;
 139                         }
 140                 } else if ( c1 >= 0xc7 && c1 <= 0xfe){
 141                         w = (c1 - 0xc7)*94 + (c - 0xa1);
 142                         if (w >= 0 && w < uhc3_ucs_table_size) {
 143                                 flag = 3;
 144                                 w = uhc3_ucs_table[w];
 145                         } else {
 146                                 w = 0;
 147                         }
 148                 }
 149                 if (flag > 0){
 150                         if (w <= 0) {
 151                                 w = (c1 << 8) | c;
 152                                 w &= MBFL_WCSPLANE_MASK;
 153                                 w |= MBFL_WCSPLANE_UHC;
 154                         }
 155                         CK((*filter->output_function)(w, filter->data));
 156                 } else {
 157                         if ((c >= 0 && c < 0x21) || c == 0x7f) {                /* CTLs */
 158                                 CK((*filter->output_function)(c, filter->data));
 159                         } else {
 160                                 w = (c1 << 8) | c;
 161                                 w &= MBFL_WCSGROUP_MASK;
 162                                 w |= MBFL_WCSGROUP_THROUGH;
 163                                 CK((*filter->output_function)(w, filter->data));
 164                         }
 165                 }
 166                 break;
 167 
 168         default:
 169                 filter->status = 0;
 170                 break;
 171         }
 172 
 173         return c;
 174 }
 175 
 176 /*
 177  * wchar => UHC
 178  */
 179 int
 180 mbfl_filt_conv_wchar_uhc(int c, mbfl_convert_filter *filter)
 181 {
 182         int c1, s;
 183 
 184         s = 0;
 185         if (c >= ucs_a1_uhc_table_min && c < ucs_a1_uhc_table_max) {
 186                 s = ucs_a1_uhc_table[c - ucs_a1_uhc_table_min];
 187         } else if (c >= ucs_a2_uhc_table_min && c < ucs_a2_uhc_table_max) {
 188                 s = ucs_a2_uhc_table[c - ucs_a2_uhc_table_min];
 189         } else if (c >= ucs_a3_uhc_table_min && c < ucs_a3_uhc_table_max) {
 190                 s = ucs_a3_uhc_table[c - ucs_a3_uhc_table_min];
 191         } else if (c >= ucs_i_uhc_table_min && c < ucs_i_uhc_table_max) {
 192                 s = ucs_i_uhc_table[c - ucs_i_uhc_table_min];
 193         } else if (c >= ucs_s_uhc_table_min && c < ucs_s_uhc_table_max) {
 194                 s = ucs_s_uhc_table[c - ucs_s_uhc_table_min];
 195         } else if (c >= ucs_r1_uhc_table_min && c < ucs_r1_uhc_table_max) {
 196                 s = ucs_r1_uhc_table[c - ucs_r1_uhc_table_min];
 197         } else if (c >= ucs_r2_uhc_table_min && c < ucs_r2_uhc_table_max) {
 198                 s = ucs_r2_uhc_table[c - ucs_r2_uhc_table_min];
 199         }
 200         if (s <= 0) {
 201                 c1 = c & ~MBFL_WCSPLANE_MASK;
 202                 if (c1 == MBFL_WCSPLANE_UHC) {
 203                         s = c & MBFL_WCSPLANE_MASK;
 204                 }
 205                 if (c == 0) {
 206                         s = 0;
 207                 } else if (s <= 0) {
 208                         s = -1;
 209                 }
 210         }
 211         if (s >= 0) {
 212                 if (s < 0x80) { /* latin */
 213                         CK((*filter->output_function)(s, filter->data));
 214                 } else {
 215                         CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
 216                         CK((*filter->output_function)(s & 0xff, filter->data));
 217                 }
 218         } else {
 219                 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
 220                         CK(mbfl_filt_conv_illegal_output(c, filter));
 221                 }
 222         }
 223 
 224         return c;
 225 }
 226 
 227 static int mbfl_filt_ident_uhc(int c, mbfl_identify_filter *filter)
 228 {
 229         switch (filter->status) {
 230         case 0: /* latin */
 231                 if (c >= 0 && c < 0x80) { /* ok */
 232                         ;
 233                 } else if (c >= 0x81 && c <= 0xa0) {    /* dbcs first char */
 234                     filter->status= 1;
 235                 } else if (c >= 0xa1 && c <= 0xc6) {    /* dbcs first char */
 236                     filter->status= 2;
 237                 } else if (c >= 0xc7 && c <= 0xfe) {    /* dbcs first char */
 238                     filter->status= 3;
 239                 } else { /* bad */
 240                         filter->flag = 1;
 241                 }
 242 
 243         case 1:
 244         case 2:
 245                 if (c < 0x41 || (c > 0x5a && c < 0x61)
 246                         || (c > 0x7a && c < 0x81) || c > 0xfe) {        /* bad */
 247                     filter->flag = 1;
 248                 }
 249                 filter->status = 0;
 250                 break;
 251 
 252         case 3:
 253                 if (c < 0xa1 || c > 0xfe) {     /* bad */
 254                     filter->flag = 1;
 255                 }
 256                 filter->status = 0;
 257                 break;
 258 
 259         default:
 260                 filter->status = 0;
 261                 break;
 262         }
 263 
 264         return c;
 265 }
 266 
 267
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root/ext/mbstring/libmbfl/filters/mbfilter_uhc.c

DEFINITIONS
