1/* $FreeBSD: head/lib/libiconv_modules/VIQR/citrus_viqr.c 260003 2013-12-28 13:49:48Z dim $ */
2/* $NetBSD: citrus_viqr.c,v 1.4 2008/06/14 16:01:08 tnozaki Exp $ */
3
4/*-
5 * Copyright (c)2006 Citrus Project,
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 */
30
31#include <sys/cdefs.h>
32#include <sys/queue.h>
33#include <sys/types.h>
34
35#include <assert.h>
36#include <errno.h>
37#include <limits.h>
38#include <stddef.h>
39#include <stdint.h>
40#include <stdlib.h>
41#include <string.h>
42#include <wchar.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_stdenc.h"
49#include "citrus_viqr.h"
50
51#define ESCAPE '\\'
52
53/*
54 * this table generated from RFC 1456.
55 */
56static const char *mnemonic_rfc1456[0x100] = {
57 NULL , NULL , "A(?", NULL , NULL , "A(~", "A^~", NULL ,
58 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
59 NULL , NULL , NULL , NULL , "Y?" , NULL , NULL , NULL ,
60 NULL , "Y~" , NULL , NULL , NULL , NULL , "Y." , NULL ,
61 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
62 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
63 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
64 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
65 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
66 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
67 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
68 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
69 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
70 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
71 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
72 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL ,
73 "A." , "A('", "A(`", "A(.", "A^'", "A^`", "A^?", "A^.",
74 "E~" , "E." , "E^'", "E^`", "E^?", "E^~", "E^.", "O^'",
75 "O^`", "O^?", "O^~", "O^.", "O+.", "O+'", "O+`", "O+?",
76 "I." , "O?" , "O." , "I?" , "U?" , "U~" , "U." , "Y`" ,
77 "O~" , "a('", "a(`", "a(.", "a^'", "a^`", "a^?", "a^.",
78 "e~" , "e." , "e^'", "e^`", "e^?", "e^~", "e^.", "o^'",
79 "o^`", "o^?", "o^~", "O+~", "O+" , "o^.", "o+`", "o+?",
80 "i." , "U+.", "U+'", "U+`", "U+?", "o+" , "o+'", "U+" ,
81 "A`" , "A'" , "A^" , "A~" , "A?" , "A(" , "a(?", "a(~",
82 "E`" , "E'" , "E^" , "E?" , "I`" , "I'" , "I~" , "y`" ,
83 "DD" , "u+'", "O`" , "O'" , "O^" , "a." , "y?" , "u+`",
84 "u+?", "U`" , "U'" , "y~" , "y." , "Y'" , "o+~", "u+" ,
85 "a`" , "a'" , "a^" , "a~" , "a?" , "a(" , "u+~", "a^~",
86 "e`" , "e'" , "e^" , "e?" , "i`" , "i'" , "i~" , "i?" ,
87 "dd" , "u+.", "o`" , "o'" , "o^" , "o~" , "o?" , "o." ,
88 "u." , "u`" , "u'" , "u~" , "u?" , "y'" , "o+.", "U+~",
89};
90
91typedef struct {
92 const char *name;
93 wchar_t value;
94} mnemonic_def_t;
95
96static const mnemonic_def_t mnemonic_ext[] = {
97/* add extra mnemonic here (should be sorted by wchar_t order). */
98};
99static const size_t mnemonic_ext_size =
100 sizeof(mnemonic_ext) / sizeof(mnemonic_def_t);
101
102static const char *
103mnemonic_ext_find(wchar_t wc, const mnemonic_def_t *head, size_t n)
104{
105 const mnemonic_def_t *mid;
106
107 for (; n > 0; n >>= 1) {
108 mid = head + (n >> 1);
109 if (mid->value == wc)
110 return (mid->name);
111 else if (mid->value < wc) {
112 head = mid + 1;
113 --n;
114 }
115 }
116 return (NULL);
117}
118
119struct mnemonic_t;
120typedef TAILQ_HEAD(mnemonic_list_t, mnemonic_t) mnemonic_list_t;
121typedef struct mnemonic_t {
122 TAILQ_ENTRY(mnemonic_t) entry;
123 struct mnemonic_t *parent;
124 mnemonic_list_t child;
125 wchar_t value;
126 int ascii;
127} mnemonic_t;
128
129static mnemonic_t *
130mnemonic_list_find(mnemonic_list_t *ml, int ch)
131{
132 mnemonic_t *m;
133
134 TAILQ_FOREACH(m, ml, entry) {
135 if (m->ascii == ch)
136 return (m);
137 }
138
139 return (NULL);
140}
141
142static mnemonic_t *
143mnemonic_create(mnemonic_t *parent, int ascii, wchar_t value)
144{
145 mnemonic_t *m;
146
147 m = malloc(sizeof(*m));
148 if (m != NULL) {
149 m->parent = parent;
150 m->ascii = ascii;
151 m->value = value;
152 TAILQ_INIT(&m->child);
153 }
154
155 return (m);
156}
157
158static int
159mnemonic_append_child(mnemonic_t *m, const char *s,
160 wchar_t value, wchar_t invalid)
161{
162 mnemonic_t *m0;
163 int ch;
164
165 ch = (unsigned char)*s++;
166 if (ch == '\0')
167 return (EINVAL);
168 m0 = mnemonic_list_find(&m->child, ch);
169 if (m0 == NULL) {
170 m0 = mnemonic_create(m, ch, (wchar_t)ch);
171 if (m0 == NULL)
172 return (ENOMEM);
173 TAILQ_INSERT_TAIL(&m->child, m0, entry);
174 }
175 m = m0;
176 for (m0 = NULL; (ch = (unsigned char)*s) != '\0'; ++s) {
177 m0 = mnemonic_list_find(&m->child, ch);
178 if (m0 == NULL) {
179 m0 = mnemonic_create(m, ch, invalid);
180 if (m0 == NULL)
181 return (ENOMEM);
182 TAILQ_INSERT_TAIL(&m->child, m0, entry);
183 }
184 m = m0;
185 }
186 if (m0 == NULL)
187 return (EINVAL);
188 m0->value = value;
189
190 return (0);
191}
192
193static void
194mnemonic_destroy(mnemonic_t *m)
195{
196 mnemonic_t *m0;
197
198 TAILQ_FOREACH(m0, &m->child, entry)
199 mnemonic_destroy(m0);
200 free(m);
201}
202
203typedef struct {
204 mnemonic_t *mroot;
205 wchar_t invalid;
206 size_t mb_cur_max;
207} _VIQREncodingInfo;
208
209typedef struct {
210 int chlen;
211 char ch[MB_LEN_MAX];
212} _VIQRState;
213
214#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
215#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
216
217#define _FUNCNAME(m) _citrus_VIQR_##m
218#define _ENCODING_INFO _VIQREncodingInfo
219#define _ENCODING_STATE _VIQRState
220#define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max
221#define _ENCODING_IS_STATE_DEPENDENT 1
222#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
223
224static __inline void
225/*ARGSUSED*/
226_citrus_VIQR_init_state(_VIQREncodingInfo * __restrict ei __unused,
227 _VIQRState * __restrict psenc)
228{
229
230 psenc->chlen = 0;
231}
232
233#if 0
234static __inline void
235/*ARGSUSED*/
236_citrus_VIQR_pack_state(_VIQREncodingInfo * __restrict ei __unused,
237 void *__restrict pspriv, const _VIQRState * __restrict psenc)
238{
239
240 memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
241}
242
243static __inline void
244/*ARGSUSED*/
245_citrus_VIQR_unpack_state(_VIQREncodingInfo * __restrict ei __unused,
246 _VIQRState * __restrict psenc, const void * __restrict pspriv)
247{
248
249 memcpy((void *)psenc, pspriv, sizeof(*psenc));
250}
251#endif
252
253static int
254_citrus_VIQR_mbrtowc_priv(_VIQREncodingInfo * __restrict ei,
255 wchar_t * __restrict pwc, const char ** __restrict s, size_t n,
256 _VIQRState * __restrict psenc, size_t * __restrict nresult)
257{
258 mnemonic_t *m, *m0;
259 const char *s0;
260 wchar_t wc;
261 ssize_t i;
262 int ch, escape;
263
264 if (*s == NULL) {
265 _citrus_VIQR_init_state(ei, psenc);
266 *nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT;
267 return (0);
268 }
269 s0 = *s;
270
271 i = 0;
272 m = ei->mroot;
273 for (escape = 0;;) {
274 if (psenc->chlen == i) {
275 if (n-- < 1) {
276 *s = s0;
277 *nresult = (size_t)-2;
278 return (0);
279 }
280 psenc->ch[psenc->chlen++] = *s0++;
281 }
282 ch = (unsigned char)psenc->ch[i++];
283 if (ch == ESCAPE) {
284 if (m != ei->mroot)
285 break;
286 escape = 1;
287 continue;
288 }
289 if (escape != 0)
290 break;
291 m0 = mnemonic_list_find(&m->child, ch);
292 if (m0 == NULL)
293 break;
294 m = m0;
295 }
296 while (m != ei->mroot) {
297 --i;
298 if (m->value != ei->invalid)
299 break;
300 m = m->parent;
301 }
302 if (ch == ESCAPE && m != ei->mroot)
303 ++i;
304 psenc->chlen -= i;
305 memmove(&psenc->ch[0], &psenc->ch[i], psenc->chlen);
306 wc = (m == ei->mroot) ? (wchar_t)ch : m->value;
307 if (pwc != NULL)
308 *pwc = wc;
309 *nresult = (size_t)(wc == 0 ? 0 : s0 - *s);
310 *s = s0;
311
312 return (0);
313}
314
315static int
316_citrus_VIQR_wcrtomb_priv(_VIQREncodingInfo * __restrict ei,
317 char * __restrict s, size_t n, wchar_t wc,
318 _VIQRState * __restrict psenc, size_t * __restrict nresult)
319{
320 mnemonic_t *m;
321 const char *p;
322 int ch = 0;
323
324 switch (psenc->chlen) {
325 case 0: case 1:
326 break;
327 default:
328 return (EINVAL);
329 }
330 m = NULL;
331 if ((uint32_t)wc <= 0xFF) {
332 p = mnemonic_rfc1456[wc & 0xFF];
333 if (p != NULL)
334 goto mnemonic_found;
335 if (n-- < 1)
336 goto e2big;
337 ch = (unsigned int)wc;
338 m = ei->mroot;
339 if (psenc->chlen > 0) {
340 m = mnemonic_list_find(&m->child, psenc->ch[0]);
341 if (m == NULL)
342 return (EINVAL);
343 psenc->ch[0] = ESCAPE;
344 }
345 if (mnemonic_list_find(&m->child, ch) == NULL) {
346 psenc->chlen = 0;
347 m = NULL;
348 }
349 psenc->ch[psenc->chlen++] = ch;
350 } else {
351 p = mnemonic_ext_find(wc, &mnemonic_ext[0], mnemonic_ext_size);
352 if (p == NULL) {
353 *nresult = (size_t)-1;
354 return (EILSEQ);
355 } else {
356mnemonic_found:
357 psenc->chlen = 0;
358 while (*p != '\0') {
359 if (n-- < 1)
360 goto e2big;
361 psenc->ch[psenc->chlen++] = *p++;
362 }
363 }
364 }
365 memcpy(s, psenc->ch, psenc->chlen);
366 *nresult = psenc->chlen;
367 if (m == ei->mroot) {
368 psenc->ch[0] = ch;
369 psenc->chlen = 1;
370 } else
371 psenc->chlen = 0;
372
373 return (0);
374
375e2big:
376 *nresult = (size_t)-1;
377 return (E2BIG);
378}
379
380static int
381/* ARGSUSED */
382_citrus_VIQR_put_state_reset(_VIQREncodingInfo * __restrict ei __unused,
383 char * __restrict s __unused, size_t n __unused,
384 _VIQRState * __restrict psenc, size_t * __restrict nresult)
385{
386
387 switch (psenc->chlen) {
388 case 0: case 1:
389 break;
390 default:
391 return (EINVAL);
392 }
393 *nresult = 0;
394 psenc->chlen = 0;
395
396 return (0);
397}
398
399static __inline int
400/*ARGSUSED*/
401_citrus_VIQR_stdenc_wctocs(_VIQREncodingInfo * __restrict ei __unused,
402 _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
403{
404
405 *csid = 0;
406 *idx = (_index_t)wc;
407
408 return (0);
409}
410
411static __inline int
412/*ARGSUSED*/
413_citrus_VIQR_stdenc_cstowc(_VIQREncodingInfo * __restrict ei __unused,
414 wchar_t * __restrict pwc, _csid_t csid, _index_t idx)
415{
416
417 if (csid != 0)
418 return (EILSEQ);
419 *pwc = (wchar_t)idx;
420
421 return (0);
422}
423
424static void
425_citrus_VIQR_encoding_module_uninit(_VIQREncodingInfo *ei)
426{
427
428 mnemonic_destroy(ei->mroot);
429}
430
431static int
432/*ARGSUSED*/
433_citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei,
434 const void * __restrict var __unused, size_t lenvar __unused)
435{
436 const mnemonic_def_t *p;
437 const char *s;
438 size_t i, n;
439 int errnum;
440
441 ei->mb_cur_max = 1;
442 ei->invalid = (wchar_t)-1;
443 ei->mroot = mnemonic_create(NULL, '\0', ei->invalid);
444 if (ei->mroot == NULL)
445 return (ENOMEM);
446 for (i = 0; i < sizeof(mnemonic_rfc1456) / sizeof(const char *); ++i) {
447 s = mnemonic_rfc1456[i];
448 if (s == NULL)
449 continue;
450 n = strlen(s);
451 if (ei->mb_cur_max < n)
452 ei->mb_cur_max = n;
453 errnum = mnemonic_append_child(ei->mroot,
454 s, (wchar_t)i, ei->invalid);
455 if (errnum != 0) {
456 _citrus_VIQR_encoding_module_uninit(ei);
457 return (errnum);
458 }
459 }
460 for (i = 0;; ++i) {
461 p = &mnemonic_ext[i];
462 n = strlen(p->name);
463 if (ei->mb_cur_max < n)
464 ei->mb_cur_max = n;
465 errnum = mnemonic_append_child(ei->mroot,
466 p->name, p->value, ei->invalid);
467 if (errnum != 0) {
468 _citrus_VIQR_encoding_module_uninit(ei);
469 return (errnum);
470 }
471 }
472
473 return (0);
474}
475
476static __inline int
477/*ARGSUSED*/
478_citrus_VIQR_stdenc_get_state_desc_generic(_VIQREncodingInfo * __restrict ei __unused,
479 _VIQRState * __restrict psenc, int * __restrict rstate)
480{
481
482 *rstate = (psenc->chlen == 0) ?
483 _STDENC_SDGEN_INITIAL :
484 _STDENC_SDGEN_INCOMPLETE_CHAR;
485
486 return (0);
487}
488
489/* ----------------------------------------------------------------------
490 * public interface for stdenc
491 */
492
493_CITRUS_STDENC_DECLS(VIQR);
494_CITRUS_STDENC_DEF_OPS(VIQR);
495
496#include "citrus_stdenc_template.h"