2 * Copyright (C) 1999-2001 Free Software Foundation, Inc.
3 * This file is part of the GNU LIBICONV Library.
5 * The GNU LIBICONV Library is free software; you can redistribute it
6 * and/or modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * The GNU LIBICONV Library is distributed in the hope that it will be
11 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with the GNU LIBICONV Library; see the file COPYING.LIB.
17 * If not, write to the Free Software Foundation, Inc., 59 Temple Place -
18 * Suite 330, Boston, MA 02111-1307, USA.
25 /* Specification: RFC 1922 */
32 * The state is composed of one of the following values
35 #define STATE_TWOBYTE 1
37 * and one of the following values, << 8
40 #define STATE2_DESIGNATED_GB2312 1
41 #define STATE2_DESIGNATED_CNS11643_1 2
42 #define STATE2_DESIGNATED_ISO_IR_165 3
44 * and one of the following values, << 16
47 #define STATE3_DESIGNATED_CNS11643_2 1
49 * and one of the following values, << 24
52 #define STATE4_DESIGNATED_CNS11643_3 1
53 #define STATE4_DESIGNATED_CNS11643_4 2
54 #define STATE4_DESIGNATED_CNS11643_5 3
55 #define STATE4_DESIGNATED_CNS11643_6 4
56 #define STATE4_DESIGNATED_CNS11643_7 5
59 unsigned int state1 = state & 0xff, state2 = (state >> 8) & 0xff, state3 = (state >> 16) & 0xff, state4 = state >> 24
60 #define COMBINE_STATE \
61 state = (state4 << 24) | (state3 << 16) | (state2 << 8) | state1
64 iso2022_cn_ext_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
66 state_t state = conv->istate;
78 state2 = STATE2_DESIGNATED_GB2312;
85 state2 = STATE2_DESIGNATED_CNS11643_1;
92 state2 = STATE2_DESIGNATED_ISO_IR_165;
101 state3 = STATE3_DESIGNATED_CNS11643_2;
110 state4 = STATE4_DESIGNATED_CNS11643_3;
117 state4 = STATE4_DESIGNATED_CNS11643_4;
124 state4 = STATE4_DESIGNATED_CNS11643_5;
131 state4 = STATE4_DESIGNATED_CNS11643_6;
138 state4 = STATE4_DESIGNATED_CNS11643_7;
150 case STATE3_DESIGNATED_CNS11643_2:
151 if (s[2] < 0x80 && s[3] < 0x80) {
152 int ret = cns11643_2_mbtowc(conv,pwc,s+2,2);
153 if (ret == RET_ILSEQ)
155 if (ret != 2) abort();
157 conv->istate = state;
168 case STATE4_DESIGNATED_CNS11643_3:
169 if (s[2] < 0x80 && s[3] < 0x80) {
170 int ret = cns11643_3_mbtowc(conv,pwc,s+2,2);
171 if (ret == RET_ILSEQ)
173 if (ret != 2) abort();
175 conv->istate = state;
179 case STATE4_DESIGNATED_CNS11643_4:
180 if (s[2] < 0x80 && s[3] < 0x80) {
181 int ret = cns11643_4_mbtowc(conv,pwc,s+2,2);
182 if (ret == RET_ILSEQ)
184 if (ret != 2) abort();
186 conv->istate = state;
190 case STATE4_DESIGNATED_CNS11643_5:
191 if (s[2] < 0x80 && s[3] < 0x80) {
192 int ret = cns11643_5_mbtowc(conv,pwc,s+2,2);
193 if (ret == RET_ILSEQ)
195 if (ret != 2) abort();
197 conv->istate = state;
201 case STATE4_DESIGNATED_CNS11643_6:
202 if (s[2] < 0x80 && s[3] < 0x80) {
203 int ret = cns11643_6_mbtowc(conv,pwc,s+2,2);
204 if (ret == RET_ILSEQ)
206 if (ret != 2) abort();
208 conv->istate = state;
212 case STATE4_DESIGNATED_CNS11643_7:
213 if (s[2] < 0x80 && s[3] < 0x80) {
214 int ret = cns11643_7_mbtowc(conv,pwc,s+2,2);
215 if (ret == RET_ILSEQ)
217 if (ret != 2) abort();
219 conv->istate = state;
229 if (state2 != STATE2_DESIGNATED_GB2312 && state2 != STATE2_DESIGNATED_CNS11643_1 && state2 != STATE2_DESIGNATED_ISO_IR_165)
231 state1 = STATE_TWOBYTE;
238 state1 = STATE_ASCII;
249 int ret = ascii_mbtowc(conv,pwc,s,1);
250 if (ret == RET_ILSEQ)
252 if (ret != 1) abort();
253 if (*pwc == 0x000a || *pwc == 0x000d) {
254 state2 = STATE2_NONE; state3 = STATE3_NONE; state4 = STATE3_NONE;
257 conv->istate = state;
264 if (s[0] < 0x80 && s[1] < 0x80) {
269 case STATE2_DESIGNATED_GB2312:
270 ret = gb2312_mbtowc(conv,pwc,s,2); break;
271 case STATE2_DESIGNATED_CNS11643_1:
272 ret = cns11643_1_mbtowc(conv,pwc,s,2); break;
273 case STATE2_DESIGNATED_ISO_IR_165:
274 ret = isoir165_mbtowc(conv,pwc,s,2); break;
277 if (ret == RET_ILSEQ)
279 if (ret != 2) abort();
281 conv->istate = state;
290 conv->istate = state;
291 return RET_TOOFEW(count);
295 iso2022_cn_ext_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
297 state_t state = conv->ostate;
299 unsigned char buf[3];
302 /* There is no need to handle Unicode 3.1 tag characters and to look for
303 "zh-CN" or "zh-TW" tags, because GB2312 and CNS11643 are disjoint. */
306 ret = ascii_wctomb(conv,buf,wc,1);
307 if (ret != RET_ILUNI) {
308 if (ret != 1) abort();
310 int count = (state1 == STATE_ASCII ? 1 : 2);
313 if (state1 != STATE_ASCII) {
316 state1 = STATE_ASCII;
319 if (wc == 0x000a || wc == 0x000d) {
320 state2 = STATE2_NONE; state3 = STATE3_NONE; state4 = STATE3_NONE;
323 conv->ostate = state;
328 /* Try GB 2312-1980. */
329 ret = gb2312_wctomb(conv,buf,wc,2);
330 if (ret != RET_ILUNI) {
331 if (ret != 2) abort();
332 if (buf[0] < 0x80 && buf[1] < 0x80) {
333 int count = (state2 == STATE2_DESIGNATED_GB2312 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2;
336 if (state2 != STATE2_DESIGNATED_GB2312) {
342 state2 = STATE2_DESIGNATED_GB2312;
344 if (state1 != STATE_TWOBYTE) {
347 state1 = STATE_TWOBYTE;
352 conv->ostate = state;
357 ret = cns11643_wctomb(conv,buf,wc,3);
358 if (ret != RET_ILUNI) {
359 if (ret != 3) abort();
361 /* Try CNS 11643-1992 Plane 1. */
362 if (buf[0] == 1 && buf[1] < 0x80 && buf[2] < 0x80) {
363 int count = (state2 == STATE2_DESIGNATED_CNS11643_1 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2;
366 if (state2 != STATE2_DESIGNATED_CNS11643_1) {
372 state2 = STATE2_DESIGNATED_CNS11643_1;
374 if (state1 != STATE_TWOBYTE) {
377 state1 = STATE_TWOBYTE;
382 conv->ostate = state;
386 /* Try CNS 11643-1992 Plane 2. */
387 if (buf[0] == 2 && buf[1] < 0x80 && buf[2] < 0x80) {
388 int count = (state3 == STATE3_DESIGNATED_CNS11643_2 ? 0 : 4) + 4;
391 if (state3 != STATE3_DESIGNATED_CNS11643_2) {
397 state3 = STATE3_DESIGNATED_CNS11643_2;
404 conv->ostate = state;
408 /* Try CNS 11643-1992 Plane 3. */
409 if (buf[0] == 3 && buf[1] < 0x80 && buf[2] < 0x80) {
410 int count = (state4 == STATE4_DESIGNATED_CNS11643_3 ? 0 : 4) + 4;
413 if (state4 != STATE4_DESIGNATED_CNS11643_3) {
419 state4 = STATE4_DESIGNATED_CNS11643_3;
426 conv->ostate = state;
430 /* Try CNS 11643-1992 Plane 4. */
431 if (buf[0] == 4 && buf[1] < 0x80 && buf[2] < 0x80) {
432 int count = (state4 == STATE4_DESIGNATED_CNS11643_4 ? 0 : 4) + 4;
435 if (state4 != STATE4_DESIGNATED_CNS11643_4) {
441 state4 = STATE4_DESIGNATED_CNS11643_4;
448 conv->ostate = state;
452 /* Try CNS 11643-1992 Plane 5. */
453 if (buf[0] == 5 && buf[1] < 0x80 && buf[2] < 0x80) {
454 int count = (state4 == STATE4_DESIGNATED_CNS11643_5 ? 0 : 4) + 4;
457 if (state4 != STATE4_DESIGNATED_CNS11643_5) {
463 state4 = STATE4_DESIGNATED_CNS11643_5;
470 conv->ostate = state;
474 /* Try CNS 11643-1992 Plane 6. */
475 if (buf[0] == 6 && buf[1] < 0x80 && buf[2] < 0x80) {
476 int count = (state4 == STATE4_DESIGNATED_CNS11643_6 ? 0 : 4) + 4;
479 if (state4 != STATE4_DESIGNATED_CNS11643_6) {
485 state4 = STATE4_DESIGNATED_CNS11643_6;
492 conv->ostate = state;
496 /* Try CNS 11643-1992 Plane 7. */
497 if (buf[0] == 7 && buf[1] < 0x80 && buf[2] < 0x80) {
498 int count = (state4 == STATE4_DESIGNATED_CNS11643_7 ? 0 : 4) + 4;
501 if (state4 != STATE4_DESIGNATED_CNS11643_7) {
507 state4 = STATE4_DESIGNATED_CNS11643_7;
514 conv->ostate = state;
520 /* Try ISO-IR-165. */
521 ret = isoir165_wctomb(conv,buf,wc,2);
522 if (ret != RET_ILUNI) {
523 if (ret != 2) abort();
524 if (buf[0] < 0x80 && buf[1] < 0x80) {
525 int count = (state2 == STATE2_DESIGNATED_ISO_IR_165 ? 0 : 4) + (state1 == STATE_TWOBYTE ? 0 : 1) + 2;
528 if (state2 != STATE2_DESIGNATED_ISO_IR_165) {
534 state2 = STATE2_DESIGNATED_ISO_IR_165;
536 if (state1 != STATE_TWOBYTE) {
539 state1 = STATE_TWOBYTE;
544 conv->ostate = state;
553 iso2022_cn_ext_reset (conv_t conv, unsigned char *r, int n)
555 state_t state = conv->ostate;
560 if (state1 != STATE_ASCII) {
564 /* conv->ostate = 0; will be done by the caller */
572 #undef STATE4_DESIGNATED_CNS11643_7
573 #undef STATE4_DESIGNATED_CNS11643_6
574 #undef STATE4_DESIGNATED_CNS11643_5
575 #undef STATE4_DESIGNATED_CNS11643_4
576 #undef STATE4_DESIGNATED_CNS11643_3
578 #undef STATE3_DESIGNATED_CNS11643_2
580 #undef STATE2_DESIGNATED_ISO_IR_165
581 #undef STATE2_DESIGNATED_CNS11643_1
582 #undef STATE2_DESIGNATED_GB2312