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_cp936.c
26 * by rui hirokawa <hirokawa@php.net> on 11 Aug 2011.
27 *
28 */
29
30 #ifdef HAVE_CONFIG_H
31 #include "config.h"
32 #endif
33
34 #include "mbfilter.h"
35 #include "mbfilter_gb18030.h"
36
37 #include "unicode_table_cp936.h"
38 #include "unicode_table_gb18030.h"
39
40 static int mbfl_filt_ident_gb18030(int c, mbfl_identify_filter *filter);
41
42 static const char *mbfl_encoding_gb18030_aliases[] = {"gb-18030", "gb-18030-2000", NULL};
43
44 const mbfl_encoding mbfl_encoding_gb18030 = {
45 mbfl_no_encoding_gb18030,
46 "GB18030",
47 "GB18030",
48 (const char *(*)[])&mbfl_encoding_gb18030_aliases,
49 NULL,
50 MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
51 };
52
53 const struct mbfl_identify_vtbl vtbl_identify_gb18030 = {
54 mbfl_no_encoding_gb18030,
55 mbfl_filt_ident_common_ctor,
56 mbfl_filt_ident_common_dtor,
57 mbfl_filt_ident_gb18030
58 };
59
60 const struct mbfl_convert_vtbl vtbl_gb18030_wchar = {
61 mbfl_no_encoding_gb18030,
62 mbfl_no_encoding_wchar,
63 mbfl_filt_conv_common_ctor,
64 mbfl_filt_conv_common_dtor,
65 mbfl_filt_conv_gb18030_wchar,
66 mbfl_filt_conv_common_flush
67 };
68
69 const struct mbfl_convert_vtbl vtbl_wchar_gb18030 = {
70 mbfl_no_encoding_wchar,
71 mbfl_no_encoding_gb18030,
72 mbfl_filt_conv_common_ctor,
73 mbfl_filt_conv_common_dtor,
74 mbfl_filt_conv_wchar_gb18030,
75 mbfl_filt_conv_common_flush
76 };
77
78 #define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
79
80
81 int
mbfl_bisec_srch(int w,const unsigned short * tbl,int n)82 mbfl_bisec_srch(int w, const unsigned short *tbl, int n)
83 {
84 int k, k1 = 0, k2 = n-1;
85
86 while (k1 < k2) {
87 k = (k1+k2) >> 1;
88 if (w <= tbl[2*k+1]) {
89 k2 = k;
90 } else if (w >= tbl[2*k+2]) {
91 k1 = k + 1;
92 } else {
93 return -1;
94 }
95 }
96 return k1;
97 }
98
99 int
mbfl_bisec_srch2(int w,const unsigned short tbl[],int n)100 mbfl_bisec_srch2(int w, const unsigned short tbl[], int n)
101 {
102 int k, k1 = 0, k2 = n;
103
104 if (w == tbl[0]) {
105 return 0;
106 }
107
108 while (k2 - k1 > 1) {
109 k = (k1 + k2) >> 1;
110 if (w < tbl[k]) {
111 k2 = k;
112 } else if (w > tbl[k]) {
113 k1 = k;
114 } else {
115 return k;
116 }
117 }
118 return -1;
119 }
120
121 /*
122 * GB18030 => wchar
123 */
124 int
mbfl_filt_conv_gb18030_wchar(int c,mbfl_convert_filter * filter)125 mbfl_filt_conv_gb18030_wchar(int c, mbfl_convert_filter *filter)
126 {
127 int k;
128 int c1, c2, c3, w = -1;
129
130 switch (filter->status) {
131 case 0:
132 if (c >= 0 && c < 0x80) { /* latin */
133 CK((*filter->output_function)(c, filter->data));
134 } else if (c == 0x80) { /* euro sign */
135 CK((*filter->output_function)(0x20ac, filter->data));
136 } else if (c == 0xff) {
137 CK((*filter->output_function)(0x00ff, filter->data));
138 } else if (c > 0x80 && c < 0xff) { /* dbcs/qbcs lead byte */
139 filter->status = 1;
140 filter->cache = c;
141 } else {
142 w = c & MBFL_WCSGROUP_MASK;
143 w |= MBFL_WCSGROUP_THROUGH;
144 CK((*filter->output_function)(w, filter->data));
145 }
146 break;
147
148 case 1: /* dbcs/qbcs second byte */
149 c1 = filter->cache;
150 filter->status = 0;
151
152 if (c1 >= 0x81 && c1 <= 0x84 && c >= 0x30 && c <= 0x39) { /* 4 byte range: Unicode BMP */
153 filter->status = 2;
154 filter->cache = (c1 << 8) | c;
155 return c;
156 } else if (c1 >= 0x90 && c1 <= 0xe3 && c >= 0x30 && c <= 0x39) {
157 /* 4 byte range: Unicode 16 planes */
158 filter->status = 2;
159 filter->cache = (c1 << 8) | c;
160 return c;
161 } else if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) &&
162 (c >= 0xa1 && c <= 0xfe)) { /* UDA part1,2: U+E000-U+E4C5 */
163 w = 94*(c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c - 0xa1) + 0xe000;
164 CK((*filter->output_function)(w, filter->data));
165 } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
166 /* UDA part3 : U+E4C6-U+E765*/
167 w = 96*(c1 - 0xa1) + c - (c >= 0x80 ? 0x41 : 0x40) + 0xe4c6;
168 CK((*filter->output_function)(w, filter->data));
169 }
170
171 c2 = (c1 << 8) | c;
172
173 if (w <= 0 &&
174 ((c2 >= 0xa2ab && c2 <= 0xa9f0 + (0xe80f-0xe801)) ||
175 (c2 >= 0xd7fa && c2 <= 0xd7fa + (0xe814-0xe810)) ||
176 (c2 >= 0xfe50 && c2 <= 0xfe80 + (0xe864-0xe844)))) {
177 for (k = 0; k < mbfl_gb18030_pua_tbl_max; k++) {
178 if (c2 >= mbfl_gb18030_pua_tbl[k][2] &&
179 c2 <= mbfl_gb18030_pua_tbl[k][2] + mbfl_gb18030_pua_tbl[k][1]
180 - mbfl_gb18030_pua_tbl[k][0]) {
181 w = c2 - mbfl_gb18030_pua_tbl[k][2] + mbfl_gb18030_pua_tbl[k][0];
182 CK((*filter->output_function)(w, filter->data));
183 break;
184 }
185 }
186 }
187
188 if (w <= 0) {
189 if ((c1 >= 0xa1 && c1 <= 0xa9 && c >= 0xa1 && c <= 0xfe) ||
190 (c1 >= 0xb0 && c1 <= 0xf7 && c >= 0xa1 && c <= 0xfe) ||
191 (c1 >= 0x81 && c1 <= 0xa0 && c >= 0x40 && c <= 0xfe && c != 0x7f) ||
192 (c1 >= 0xaa && c1 <= 0xfe && c >= 0x40 && c <= 0xa0 && c != 0x7f) ||
193 (c1 >= 0xa8 && c1 <= 0xa9 && c >= 0x40 && c <= 0xa0 && c != 0x7f)) {
194 w = (c1 - 0x81)*192 + (c - 0x40);
195 if (w >= 0 && w < cp936_ucs_table_size) {
196 w = cp936_ucs_table[w];
197 } else {
198 w = 0;
199 }
200 if (w <= 0) {
201 w = (c1 << 8) | c;
202 w &= MBFL_WCSPLANE_MASK;
203 w |= MBFL_WCSPLANE_GB18030;
204 }
205 CK((*filter->output_function)(w, filter->data));
206 } else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
207 CK((*filter->output_function)(c, filter->data));
208 } else {
209 w = (c1 << 8) | c;
210 w &= MBFL_WCSGROUP_MASK;
211 w |= MBFL_WCSGROUP_THROUGH;
212 CK((*filter->output_function)(w, filter->data));
213 }
214 }
215 break;
216 case 2: /* qbcs third byte */
217 c1 = (filter->cache >> 8) & 0xff;
218 c2 = filter->cache & 0xff;
219 filter->status = 0;
220 filter->cache = 0;
221 if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) &&
222 c2 >= 0x30 && c2 <= 0x39 && c >= 0x81 && c <= 0xfe) {
223 filter->cache = (c1 << 16) | (c2 << 8) | c;
224 filter->status = 3;
225 } else {
226 w = (c1 << 16) | (c2 << 8) | c;
227 w &= MBFL_WCSGROUP_MASK;
228 w |= MBFL_WCSGROUP_THROUGH;
229 CK((*filter->output_function)(w, filter->data));
230 }
231 break;
232
233 case 3: /* qbcs fourth byte */
234 c1 = (filter->cache >> 16) & 0xff;
235 c2 = (filter->cache >> 8) & 0xff;
236 c3 = filter->cache & 0xff;
237 filter->status = 0;
238 filter->cache = 0;
239 if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) &&
240 c2 >= 0x30 && c2 <= 0x39 && c3 >= 0x81 && c3 <= 0xfe && c >= 0x30 && c <= 0x39) {
241 if (c1 >= 0x90 && c1 <= 0xe3) {
242 w = ((((c1 - 0x90)*10 + (c2 - 0x30))*126 + (c3 - 0x81)))*10 + (c - 0x30) + 0x10000;
243 } else { /* Unicode BMP */
244 w = (((c1 - 0x81)*10 + (c2 - 0x30))*126 + (c3 - 0x81))*10 + (c - 0x30);
245 if (w >= 0 && w <= 39419) {
246 k = mbfl_bisec_srch(w, mbfl_gb2uni_tbl, mbfl_gb_uni_max);
247 if (k<0) {
248 /* error */
249 w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
250 w &= MBFL_WCSGROUP_MASK;
251 w |= MBFL_WCSGROUP_THROUGH;
252 CK((*filter->output_function)(w, filter->data));
253 return c;
254 }
255 w += mbfl_gb_uni_ofst[k];
256 } else {
257 w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
258 w &= MBFL_WCSGROUP_MASK;
259 w |= MBFL_WCSGROUP_THROUGH;
260 CK((*filter->output_function)(w, filter->data));
261 return c;
262 }
263 }
264 CK((*filter->output_function)(w, filter->data));
265 } else {
266 w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
267 w &= MBFL_WCSGROUP_MASK;
268 w |= MBFL_WCSGROUP_THROUGH;
269 CK((*filter->output_function)(w, filter->data));
270 }
271 break;
272
273 default:
274 filter->status = 0;
275 break;
276 }
277
278 return c;
279 }
280
281 /*
282 * wchar => GB18030
283 */
284 int
mbfl_filt_conv_wchar_gb18030(int c,mbfl_convert_filter * filter)285 mbfl_filt_conv_wchar_gb18030(int c, mbfl_convert_filter *filter)
286 {
287 int k, k1, k2;
288 int c1, s = 0, s1 = 0;
289
290 if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
291 s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
292 } else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
293 s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
294 } else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
295 s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
296 } else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
297 s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
298 } else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
299 /* U+F900-FA2F CJK Compatibility Ideographs */
300 if (c == 0xf92c) {
301 s = 0xfd9c;
302 } else if (c == 0xf979) {
303 s = 0xfd9d;
304 } else if (c == 0xf995) {
305 s = 0xfd9e;
306 } else if (c == 0xf9e7) {
307 s = 0xfd9f;
308 } else if (c == 0xf9f1) {
309 s = 0xfda0;
310 } else if (c >= 0xfa0c && c <= 0xfa29) {
311 s = ucs_ci_s_cp936_table[c - 0xfa0c];
312 }
313 } else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
314 /* FE30h CJK Compatibility Forms */
315 s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
316 } else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
317 /* U+FE50-FE6F Small Form Variants */
318 s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min];
319 } else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
320 /* U+FF00-FFFF HW/FW Forms */
321 if (c == 0xff04) {
322 s = 0xa1e7;
323 } else if (c == 0xff5e) {
324 s = 0xa1ab;
325 } else if (c >= 0xff01 && c <= 0xff5d) {
326 s = c - 0xff01 + 0xa3a1;
327 } else if (c >= 0xffe0 && c <= 0xffe5) {
328 s = ucs_hff_s_cp936_table[c-0xffe0];
329 }
330 }
331
332 if (c == 0x20ac) { /* euro-sign */
333 s = 0xa2e3;
334 }
335
336 if (s <= 0 && c >= mbfl_gb18030_c_tbl_key[0] &&
337 c <= mbfl_gb18030_c_tbl_key[mbfl_gb18030_c_tbl_max-1]) {
338 k1 = mbfl_bisec_srch2(c, mbfl_gb18030_c_tbl_key, mbfl_gb18030_c_tbl_max);
339 if (k1 >= 0) {
340 s = mbfl_gb18030_c_tbl_val[k1];
341 }
342 }
343
344 if (c >= 0xe000 && c <= 0xe864) { /* PUA */
345 if (c < 0xe766) {
346 if (c < 0xe4c6) {
347 c1 = c - 0xe000;
348 s = (c1 % 94) + 0xa1; c1 /= 94;
349 s |= (c1 < 0x06 ? c1 + 0xaa : c1 + 0xf2) << 8;
350 } else {
351 c1 = c - 0xe4c6;
352 s = ((c1 / 96) + 0xa1) << 8; c1 %= 96;
353 s |= c1 + (c1 >= 0x3f ? 0x41 : 0x40);
354 }
355 } else {
356 /* U+E766..U+E864 */
357 k1 = 0; k2 = mbfl_gb18030_pua_tbl_max;
358 while (k1 < k2) {
359 k = (k1 + k2) >> 1;
360 if (c < mbfl_gb18030_pua_tbl[k][0]) {
361 k2 = k;
362 } else if (c > mbfl_gb18030_pua_tbl[k][1]) {
363 k1 = k + 1;
364 } else {
365 s = c - mbfl_gb18030_pua_tbl[k][0] + mbfl_gb18030_pua_tbl[k][2];
366 break;
367 }
368 }
369 }
370 }
371
372 if (s <= 0 && c >= 0x0080 && c <= 0xffff) { /* BMP */
373 s = mbfl_bisec_srch(c, mbfl_uni2gb_tbl, mbfl_gb_uni_max);
374 if (s >= 0) {
375 c1 = c - mbfl_gb_uni_ofst[s];
376 s = (c1 % 10) + 0x30; c1 /= 10;
377 s |= ((c1 % 126) + 0x81) << 8; c1 /= 126;
378 s |= ((c1 % 10) + 0x30) << 16; c1 /= 10;
379 s1 = c1 + 0x81;
380 }
381 } else if (c >= 0x10000 && c <= 0x10ffff) { /* Code set 3: Unicode U+10000..U+10FFFF */
382 c1 = c - 0x10000;
383 s = (c1 % 10) + 0x30; c1 /= 10;
384 s |= ((c1 % 126) + 0x81) << 8; c1 /= 126;
385 s |= ((c1 % 10) + 0x30) << 16; c1 /= 10;
386 s1 = c1 + 0x90;
387 }
388
389 if (s <= 0) {
390 c1 = c & ~MBFL_WCSPLANE_MASK;
391 if (c1 == MBFL_WCSPLANE_WINCP936) {
392 s = c & MBFL_WCSPLANE_MASK;
393 }
394 if (c == 0) {
395 s = 0;
396 } else if (s <= 0) {
397 s = -1;
398 }
399 }
400 if (s >= 0) {
401 if (s <= 0x80) { /* latin */
402 CK((*filter->output_function)(s, filter->data));
403 } else if (s1 > 0) { /* qbcs */
404 CK((*filter->output_function)(s1 & 0xff, filter->data));
405 CK((*filter->output_function)((s >> 16) & 0xff, filter->data));
406 CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
407 CK((*filter->output_function)(s & 0xff, filter->data));
408 } else { /* dbcs */
409 CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
410 CK((*filter->output_function)(s & 0xff, filter->data));
411 }
412 } else {
413 if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
414 CK(mbfl_filt_conv_illegal_output(c, filter));
415 }
416 }
417
418 return c;
419 }
420
mbfl_filt_ident_gb18030(int c,mbfl_identify_filter * filter)421 static int mbfl_filt_ident_gb18030(int c, mbfl_identify_filter *filter)
422 {
423 int c1;
424
425 c1 = (filter->status >> 8) & 0xff;
426 filter->status &= 0xff;
427
428 if (filter->status == 0) {
429 if (c <= 0x80 || c == 0xff) {
430 filter->status = 0;
431 } else {
432 filter->status = 1;
433 filter->status |= (c << 8);
434 }
435 } else if (filter->status == 1) { /* dbcs/qbcs 2nd byte */
436 if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) && c >= 0x30 && c <= 0x39) { /* qbcs */
437 filter->status = 2;
438 } else if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) && (c >= 0xa1 && c <= 0xfe)) {
439 filter->status = 0; /* UDA part 1,2 */
440 } else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
441 filter->status = 0; /* UDA part 3 */
442 } else if ((c1 >= 0xa1 && c1 <= 0xa9 && c >= 0xa1 && c <= 0xfe) ||
443 (c1 >= 0xb0 && c1 <= 0xf7 && c >= 0xa1 && c <= 0xfe) ||
444 (c1 >= 0x81 && c1 <= 0xa0 && c >= 0x40 && c <= 0xfe && c != 0x7f) ||
445 (c1 >= 0xaa && c1 <= 0xfe && c >= 0x40 && c <= 0xa0 && c != 0x7f) ||
446 (c1 >= 0xa8 && c1 <= 0xa9 && c >= 0x40 && c <= 0xa0 && c != 0x7f)) {
447 filter->status = 0; /* DBCS */
448 } else {
449 filter->flag = 1; /* bad */
450 filter->status = 0;
451 }
452 } else if (filter->status == 2) { /* qbcs 3rd byte */
453 if (c > 0x80 && c < 0xff) {
454 filter->status = 3;
455 } else {
456 filter->flag = 1; /* bad */
457 filter->status = 0;
458 }
459 } else if (filter->status == 3) { /* qbcs 4th byte */
460 if (c >= 0x30 && c < 0x40) {
461 filter->status = 0;
462 } else {
463 filter->flag = 1; /* bad */
464 filter->status = 0;
465 }
466 } else { /* bad */
467 filter->flag = 1;
468 }
469
470 return c;
471 }
472
