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 &vtbl_cp936_wchar,
70 &vtbl_wchar_cp936
71 };
72
73 const struct mbfl_identify_vtbl vtbl_identify_cp936 = {
74 mbfl_no_encoding_cp936,
75 mbfl_filt_ident_common_ctor,
76 mbfl_filt_ident_common_dtor,
77 mbfl_filt_ident_cp936
78 };
79
80 const struct mbfl_convert_vtbl vtbl_cp936_wchar = {
81 mbfl_no_encoding_cp936,
82 mbfl_no_encoding_wchar,
83 mbfl_filt_conv_common_ctor,
84 mbfl_filt_conv_common_dtor,
85 mbfl_filt_conv_cp936_wchar,
86 mbfl_filt_conv_common_flush
87 };
88
89 const struct mbfl_convert_vtbl vtbl_wchar_cp936 = {
90 mbfl_no_encoding_wchar,
91 mbfl_no_encoding_cp936,
92 mbfl_filt_conv_common_ctor,
93 mbfl_filt_conv_common_dtor,
94 mbfl_filt_conv_wchar_cp936,
95 mbfl_filt_conv_common_flush
96 };
97
98
99 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
100
101 /*
102 * CP936 => wchar
103 */
104 int
mbfl_filt_conv_cp936_wchar(int c,mbfl_convert_filter * filter)105 mbfl_filt_conv_cp936_wchar(int c, mbfl_convert_filter *filter)
106 {
107 int k;
108 int c1, c2, w = -1;
109
110 switch (filter->status) {
111 case 0:
112 if (c >= 0 && c < 0x80) { /* latin */
113 CK((*filter->output_function)(c, filter->data));
114 } else if (c == 0x80) { /* euro sign */
115 CK((*filter->output_function)(0x20ac, filter->data));
116 } else if (c < 0xff) { /* dbcs lead byte */
117 filter->status = 1;
118 filter->cache = c;
119 } else { /* 0xff */
120 CK((*filter->output_function)(0xf8f5, filter->data));
121 }
122 break;
123
124 case 1: /* dbcs second byte */
125 filter->status = 0;
126 c1 = filter->cache;
127
128 if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) &&
129 (c >= 0xa1 && c <= 0xfe)) {
130 /* UDA part1,2: U+E000-U+E4C5 */
131 w = 94*(c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c - 0xa1) + 0xe000;
132 CK((*filter->output_function)(w, filter->data));
133 } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
134 /* UDA part3 : U+E4C6-U+E765*/
135 w = 96*(c1 - 0xa1) + c - (c >= 0x80 ? 0x41 : 0x40) + 0xe4c6;
136 CK((*filter->output_function)(w, filter->data));
137 }
138
139 c2 = (c1 << 8) | c;
140
141 if (w <= 0 &&
142 ((c2 >= 0xa2ab && c2 <= 0xa9f0 + (0xe80f-0xe801)) ||
143 (c2 >= 0xd7fa && c2 <= 0xd7fa + (0xe814-0xe810)) ||
144 (c2 >= 0xfe50 && c2 <= 0xfe80 + (0xe864-0xe844)))) {
145 for (k = 0; k < mbfl_cp936_pua_tbl_max; k++) {
146 if (c2 >= mbfl_cp936_pua_tbl[k][2] &&
147 c2 <= mbfl_cp936_pua_tbl[k][2] +
148 mbfl_cp936_pua_tbl[k][1] - mbfl_cp936_pua_tbl[k][0]) {
149 w = c2 - mbfl_cp936_pua_tbl[k][2] + mbfl_cp936_pua_tbl[k][0];
150 CK((*filter->output_function)(w, filter->data));
151 break;
152 }
153 }
154 }
155
156 if (w <= 0) {
157 if (c1 < 0xff && c1 > 0x80 && c > 0x39 && c < 0xff && c != 0x7f) {
158 w = (c1 - 0x81)*192 + (c - 0x40);
159 if (w >= 0 && w < cp936_ucs_table_size) {
160 w = cp936_ucs_table[w];
161 } else {
162 w = 0;
163 }
164 if (w <= 0) {
165 w = (c1 << 8) | c;
166 w &= MBFL_WCSPLANE_MASK;
167 w |= MBFL_WCSPLANE_WINCP936;
168 }
169 CK((*filter->output_function)(w, filter->data));
170 } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
171 CK((*filter->output_function)(c, filter->data));
172 } else {
173 w = (c1 << 8) | c;
174 w &= MBFL_WCSGROUP_MASK;
175 w |= MBFL_WCSGROUP_THROUGH;
176 CK((*filter->output_function)(w, filter->data));
177 }
178 }
179 break;
180
181 default:
182 filter->status = 0;
183 break;
184 }
185
186 return c;
187 }
188
189 /*
190 * wchar => CP936
191 */
192 int
mbfl_filt_conv_wchar_cp936(int c,mbfl_convert_filter * filter)193 mbfl_filt_conv_wchar_cp936(int c, mbfl_convert_filter *filter)
194 {
195 int k, k1, k2;
196 int c1, s = 0;
197
198 if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
199 /* U+0000 - U+0451 */
200 s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
201 } else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
202 /* U+2000 - U+26FF */
203 if (c == 0x203e) {
204 s = 0xa3fe;
205 } else if (c == 0x2218) {
206 s = 0xa1e3;
207 } else if (c == 0x223c) {
208 s = 0xa1ab;
209 } else {
210 s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
211 }
212 } else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
213 /* U+2F00 - U+33FF */
214 s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
215 } else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
216 /* U+4D00-9FFF CJK Unified Ideographs (+ Extension A) */
217 s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
218 } else if (c >= 0xe000 && c <= 0xe864) { /* PUA */
219 if (c < 0xe766) {
220 if (c < 0xe4c6) {
221 c1 = c - 0xe000;
222 s = (c1 % 94) + 0xa1; c1 /= 94;
223 s |= (c1 < 0x06 ? c1 + 0xaa : c1 + 0xf2) << 8;
224 } else {
225 c1 = c - 0xe4c6;
226 s = ((c1 / 96) + 0xa1) << 8; c1 %= 96;
227 s |= c1 + (c1 >= 0x3f ? 0x41 : 0x40);
228 }
229 } else {
230 /* U+E766..U+E864 */
231 k1 = 0; k2 = mbfl_cp936_pua_tbl_max;
232 while (k1 < k2) {
233 k = (k1 + k2) >> 1;
234 if (c < mbfl_cp936_pua_tbl[k][0]) {
235 k2 = k;
236 } else if (c > mbfl_cp936_pua_tbl[k][1]) {
237 k1 = k + 1;
238 } else {
239 s = c - mbfl_cp936_pua_tbl[k][0] + mbfl_cp936_pua_tbl[k][2];
240 break;
241 }
242 }
243 }
244 } else if (c == 0xf8f5) {
245 s = 0xff;
246 } else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
247 /* U+F900-FA2F CJK Compatibility Ideographs */
248 s = ucs_ci_cp936_table[c - ucs_ci_cp936_table_min];
249 } else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
250 s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
251 } else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
252 s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min]; /* U+FE50-FE6F Small Form Variants */
253 } else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
254 /* U+FF00-FFFF HW/FW Forms */
255 if (c == 0xff04) {
256 s = 0xa1e7;
257 } else if (c == 0xff5e) {
258 s = 0xa1ab;
259 } else if (c >= 0xff01 && c <= 0xff5d) {
260 s = c - 0xff01 + 0xa3a1;
261 } else if (c >= 0xffe0 && c <= 0xffe5) {
262 s = ucs_hff_s_cp936_table[c-0xffe0];
263 }
264 }
265 if (s <= 0) {
266 c1 = c & ~MBFL_WCSPLANE_MASK;
267 if (c1 == MBFL_WCSPLANE_WINCP936) {
268 s = c & MBFL_WCSPLANE_MASK;
269 }
270 if (c == 0) {
271 s = 0;
272 } else if (s <= 0) {
273 s = -1;
274 }
275 }
276 if (s >= 0) {
277 if (s <= 0x80 || s == 0xff) { /* latin */
278 CK((*filter->output_function)(s, filter->data));
279 } else {
280 CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
281 CK((*filter->output_function)(s & 0xff, filter->data));
282 }
283 } else {
284 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
285 CK(mbfl_filt_conv_illegal_output(c, filter));
286 }
287 }
288
289 return c;
290 }
291
mbfl_filt_ident_cp936(int c,mbfl_identify_filter * filter)292 static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter)
293 {
294 if (filter->status) { /* kanji second char */
295 if (c < 0x40 || c > 0xfe || c == 0x7f) { /* bad */
296 filter->flag = 1;
297 }
298 filter->status = 0;
299 } else if (c >= 0 && c < 0x80) { /* latin ok */
300 ;
301 } else if (c > 0x80 && c < 0xff) { /* DBCS lead byte */
302 filter->status = 1;
303 } else { /* bad */
304 filter->flag = 1;
305 }
306
307 return c;
308 }
309
