citrus_gbk2k.c revision 1.8.22.2 1 /* $NetBSD: citrus_gbk2k.c,v 1.8.22.2 2017/07/21 20:22:29 perseant Exp $ */
2
3 /*-
4 * Copyright (c)2003 Citrus Project,
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 #if defined(LIBC_SCCS) && !defined(lint)
31 __RCSID("$NetBSD: citrus_gbk2k.c,v 1.8.22.2 2017/07/21 20:22:29 perseant Exp $");
32 #endif /* LIBC_SCCS and not lint */
33
34 #include <assert.h>
35 #include <errno.h>
36 #include <string.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <stddef.h>
40 #include <wchar.h>
41 #include <sys/types.h>
42 #include <limits.h>
43
44 #include "citrus_namespace.h"
45 #include "citrus_types.h"
46 #include "citrus_bcs.h"
47 #include "citrus_module.h"
48 #include "citrus_ctype.h"
49 #include "citrus_stdenc.h"
50 #include "citrus_gbk2k.h"
51
52
53 /* ----------------------------------------------------------------------
54 * private stuffs used by templates
55 */
56
57 typedef struct _GBK2KState {
58 char ch[4];
59 int chlen;
60 } _GBK2KState;
61
62 typedef struct {
63 int mb_cur_max;
64 } _GBK2KEncodingInfo;
65
66 typedef struct {
67 _GBK2KEncodingInfo ei;
68 struct {
69 /* for future multi-locale facility */
70 _GBK2KState s_mblen;
71 _GBK2KState s_mbrlen;
72 _GBK2KState s_mbrtowc;
73 _GBK2KState s_mbtowc;
74 _GBK2KState s_mbsrtowcs;
75 _GBK2KState s_mbsnrtowcs;
76 _GBK2KState s_wcrtomb;
77 _GBK2KState s_wcsrtombs;
78 _GBK2KState s_wcsnrtombs;
79 _GBK2KState s_wctomb;
80 } states;
81 } _GBK2KCTypeInfo;
82
83 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
84 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
85
86 #define _FUNCNAME(m) _citrus_GBK2K_##m
87 #define _ENCODING_INFO _GBK2KEncodingInfo
88 #define _CTYPE_INFO _GBK2KCTypeInfo
89 #define _ENCODING_STATE _GBK2KState
90 #define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max
91 #define _ENCODING_IS_STATE_DEPENDENT 0
92 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
93
94 #include "citrus_u2k_template.h"
95
96 static __inline void
97 /*ARGSUSED*/
98 _citrus_GBK2K_init_state(_GBK2KEncodingInfo * __restrict ei,
99 _GBK2KState * __restrict s)
100 {
101 memset(s, 0, sizeof(*s));
102 }
103
104 static __inline void
105 /*ARGSUSED*/
106 _citrus_GBK2K_pack_state(_GBK2KEncodingInfo * __restrict ei,
107 void * __restrict pspriv,
108 const _GBK2KState * __restrict s)
109 {
110 memcpy(pspriv, (const void *)s, sizeof(*s));
111 }
112
113 static __inline void
114 /*ARGSUSED*/
115 _citrus_GBK2K_unpack_state(_GBK2KEncodingInfo * __restrict ei,
116 _GBK2KState * __restrict s,
117 const void * __restrict pspriv)
118 {
119 memcpy((void *)s, pspriv, sizeof(*s));
120 }
121
122 static __inline int
123 _mb_singlebyte(int c)
124 {
125 c &= 0xff;
126 return (c <= 0x7f);
127 }
128
129 static __inline int
130 _mb_leadbyte(int c)
131 {
132 c &= 0xff;
133 return (0x81 <= c && c <= 0xfe);
134 }
135
136 static __inline int
137 _mb_trailbyte(int c)
138 {
139 c &= 0xff;
140 return ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfe));
141 }
142
143 static __inline int
144 _mb_surrogate(int c)
145 {
146 c &= 0xff;
147 return (0x30 <= c && c <= 0x39);
148 }
149
150 static __inline int
151 _mb_count(wchar_kuten_t v)
152 {
153 u_int32_t c;
154
155 c = (u_int32_t)v; /* XXX */
156 if (!(c & 0xffffff00))
157 return (1);
158 if (!(c & 0xffff0000))
159 return (2);
160 return (4);
161 }
162
163 #define _PSENC (psenc->ch[psenc->chlen - 1])
164 #define _PUSH_PSENC(c) (psenc->ch[psenc->chlen++] = (c))
165
166 static int
167 _citrus_GBK2K_mbrtowc_priv(_GBK2KEncodingInfo * __restrict ei,
168 wchar_ucs4_t * __restrict pwc,
169 const char ** __restrict s, size_t n,
170 _GBK2KState * __restrict psenc,
171 size_t * __restrict nresult)
172 {
173 int chlenbak, len;
174 const char *s0, *s1;
175 wchar_kuten_t wc;
176
177 _DIAGASSERT(ei != NULL);
178 /* pwc may be NULL */
179 _DIAGASSERT(s != NULL);
180 _DIAGASSERT(psenc != NULL);
181
182 s0 = *s;
183
184 if (s0 == NULL) {
185 /* _citrus_GBK2K_init_state(ei, psenc); */
186 psenc->chlen = 0;
187 *nresult = 0;
188 return (0);
189 }
190
191 chlenbak = psenc->chlen;
192
193 switch (psenc->chlen) {
194 case 3:
195 if (!_mb_leadbyte (_PSENC))
196 goto invalid;
197 /* FALLTHROUGH */
198 case 2:
199 if (!_mb_surrogate(_PSENC) || _mb_trailbyte(_PSENC))
200 goto invalid;
201 /* FALLTHROUGH */
202 case 1:
203 if (!_mb_leadbyte (_PSENC))
204 goto invalid;
205 /* FALLTHOROUGH */
206 case 0:
207 break;
208 default:
209 goto invalid;
210 }
211
212 for (;;) {
213 if (n-- < 1)
214 goto restart;
215
216 _PUSH_PSENC(*s0++);
217
218 switch (psenc->chlen) {
219 case 1:
220 if (_mb_singlebyte(_PSENC))
221 goto convert;
222 if (_mb_leadbyte (_PSENC))
223 continue;
224 goto ilseq;
225 case 2:
226 if (_mb_trailbyte (_PSENC))
227 goto convert;
228 if (ei->mb_cur_max == 4 &&
229 _mb_surrogate (_PSENC))
230 continue;
231 goto ilseq;
232 case 3:
233 if (_mb_leadbyte (_PSENC))
234 continue;
235 goto ilseq;
236 case 4:
237 if (_mb_surrogate (_PSENC))
238 goto convert;
239 goto ilseq;
240 }
241 }
242
243 convert:
244 len = psenc->chlen;
245 s1 = &psenc->ch[0];
246 wc = 0;
247 while (len-- > 0)
248 wc = (wc << 8) | (*s1++ & 0xff);
249
250 if (pwc != NULL)
251 _citrus_GBK2K_kt2ucs(ei, pwc, wc);
252 *s = s0;
253 *nresult = (wc == 0) ? 0 : psenc->chlen - chlenbak;
254 /* _citrus_GBK2K_init_state(ei, psenc); */
255 psenc->chlen = 0;
256
257 return (0);
258
259 restart:
260 *s = s0;
261 *nresult = (size_t)-2;
262
263 return (0);
264
265 invalid:
266 return (EINVAL);
267
268 ilseq:
269 *nresult = (size_t)-1;
270 return (EILSEQ);
271 }
272
273 static int
274 _citrus_GBK2K_wcrtomb_priv(_GBK2KEncodingInfo * __restrict ei,
275 char * __restrict s, size_t n, wchar_ucs4_t wc,
276 _GBK2KState * __restrict psenc,
277 size_t * __restrict nresult)
278 {
279 int len, ret;
280
281 _DIAGASSERT(ei != NULL);
282 _DIAGASSERT(s != NULL);
283 _DIAGASSERT(psenc != NULL);
284
285 _citrus_GBK2K_ucs2kt(ei, &wc, wc);
286
287 if (psenc->chlen != 0) {
288 ret = EINVAL;
289 goto err;
290 }
291
292 len = _mb_count(wc);
293 if (n < len) {
294 ret = E2BIG;
295 goto err;
296 }
297
298 switch (len) {
299 case 1:
300 if (!_mb_singlebyte(_PUSH_PSENC(wc ))) {
301 ret = EILSEQ;
302 goto err;
303 }
304 break;
305 case 2:
306 if (!_mb_leadbyte (_PUSH_PSENC(wc >> 8)) ||
307 !_mb_trailbyte (_PUSH_PSENC(wc ))) {
308 ret = EILSEQ;
309 goto err;
310 }
311 break;
312 case 4:
313 if (ei->mb_cur_max != 4 ||
314 !_mb_leadbyte (_PUSH_PSENC(wc >> 24)) ||
315 !_mb_surrogate (_PUSH_PSENC(wc >> 16)) ||
316 !_mb_leadbyte (_PUSH_PSENC(wc >> 8)) ||
317 !_mb_surrogate (_PUSH_PSENC(wc ))) {
318 ret = EILSEQ;
319 goto err;
320 }
321 break;
322 }
323
324 _DIAGASSERT(len == psenc->chlen);
325
326 memcpy(s, psenc->ch, psenc->chlen);
327 *nresult = psenc->chlen;
328 /* _citrus_GBK2K_init_state(ei, psenc); */
329 psenc->chlen = 0;
330
331 return (0);
332
333 err:
334 *nresult = (size_t)-1;
335 return ret;
336 }
337
338 static int
339 /*ARGSUSED*/
340 _citrus_GBK2K_stdenc_wctocs(struct _citrus_stdenc *ce,
341 _csid_t * __restrict csid,
342 _index_t * __restrict idx, wchar_kuten_t wc)
343 {
344 u_int8_t ch, cl;
345
346 _DIAGASSERT(csid != NULL && idx != NULL);
347
348 if ((u_int32_t)wc<0x80) {
349 /* ISO646 */
350 *csid = 0;
351 *idx = (_index_t)wc;
352 } else if ((u_int32_t)wc>=0x10000) {
353 /* GBKUCS : XXX */
354 *csid = 3;
355 *idx = (_index_t)wc;
356 } else {
357 ch = (u_int8_t)(wc >> 8);
358 cl = (u_int8_t)wc;
359 if (ch>=0xA1 && cl>=0xA1) {
360 /* EUC G1 */
361 *csid = 1;
362 *idx = (_index_t)wc & 0x7F7FU;
363 } else {
364 /* extended area (0x8140-) */
365 *csid = 2;
366 *idx = (_index_t)wc;
367 }
368 }
369
370 return 0;
371 }
372
373 static int
374 /*ARGSUSED*/
375 _citrus_GBK2K_stdenc_cstowc(struct _citrus_stdenc *ce,
376 wchar_kuten_t * __restrict wc,
377 _csid_t csid, _index_t idx)
378 {
379 _GBK2KEncodingInfo *ei;
380
381 _DIAGASSERT(wc != NULL && ce != NULL);
382
383 ei = (_ENCODING_INFO *)(ce->ce_closure);
384 _DIAGASSERT(ei != NULL);
385
386 switch (csid) {
387 case 0:
388 /* ISO646 */
389 *wc = (wchar_kuten_t)idx;
390 break;
391 case 1:
392 /* EUC G1 */
393 *wc = (wchar_kuten_t)idx | 0x8080U;
394 break;
395 case 2:
396 /* extended area */
397 *wc = (wchar_kuten_t)idx;
398 break;
399 case 3:
400 /* GBKUCS : XXX */
401 if (ei->mb_cur_max != 4)
402 return EINVAL;
403 *wc = (wchar_kuten_t)idx;
404 break;
405 default:
406 return EILSEQ;
407 }
408
409 return 0;
410 }
411
412 static __inline int
413 /*ARGSUSED*/
414 _citrus_GBK2K_stdenc_get_state_desc_generic(_GBK2KEncodingInfo * __restrict ei,
415 _GBK2KState * __restrict psenc,
416 int * __restrict rstate)
417 {
418
419 if (psenc->chlen == 0)
420 *rstate = _STDENC_SDGEN_INITIAL;
421 else
422 *rstate = _STDENC_SDGEN_INCOMPLETE_CHAR;
423
424 return 0;
425 }
426
427 static int
428 /*ARGSUSED*/
429 _citrus_GBK2K_encoding_module_init(_GBK2KEncodingInfo * __restrict ei,
430 const void * __restrict var, size_t lenvar)
431 {
432 const char *p;
433
434 _DIAGASSERT(ei != NULL);
435
436 p = var;
437 #define MATCH(x, act) \
438 do { \
439 if (lenvar >= (sizeof(#x)-1) && \
440 _bcs_strncasecmp(p, #x, sizeof(#x)-1) == 0) { \
441 act; \
442 lenvar -= sizeof(#x)-1; \
443 p += sizeof(#x)-1; \
444 } \
445 } while (/*CONSTCOND*/0)
446 memset((void *)ei, 0, sizeof(*ei));
447 ei->mb_cur_max = 4;
448 while (lenvar>0) {
449 switch (_bcs_tolower(*p)) {
450 case '2':
451 MATCH("2byte", ei->mb_cur_max = 2);
452 break;
453 }
454 p++;
455 lenvar--;
456 }
457
458 return (0);
459 }
460
461 static void
462 /*ARGSUSED*/
463 _citrus_GBK2K_encoding_module_uninit(_GBK2KEncodingInfo *ei)
464 {
465 }
466
467
468 /* ----------------------------------------------------------------------
469 * public interface for ctype
470 */
471
472 _CITRUS_CTYPE_DECLS(GBK2K);
473 _CITRUS_CTYPE_DEF_OPS(GBK2K);
474
475 #include "citrus_ctype_template.h"
476
477 /* ----------------------------------------------------------------------
478 * public interface for stdenc
479 */
480
481 _CITRUS_STDENC_DECLS(GBK2K);
482 _CITRUS_STDENC_DEF_OPS(GBK2K);
483
484 #include "citrus_stdenc_template.h"
485