1 /*	$NetBSD: citrus_mskanji.c,v 1.13 2008/06/14 16:01:08 tnozaki Exp $	*/
2 
3 /*-
4  * SPDX-License-Identifier: BSD-2-Clause
5  *
6  * Copyright (c)2002 Citrus Project,
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30 
31 /*
32  *    ja_JP.SJIS locale table for BSD4.4/rune
33  *    version 1.0
34  *    (C) Sin'ichiro MIYATANI / Phase One, Inc
35  *    May 12, 1995
36  *
37  * Redistribution and use in source and binary forms, with or without
38  * modification, are permitted provided that the following conditions
39  * are met:
40  * 1. Redistributions of source code must retain the above copyright
41  *    notice, this list of conditions and the following disclaimer.
42  * 2. Redistributions in binary form must reproduce the above copyright
43  *    notice, this list of conditions and the following disclaimer in the
44  *    documentation and/or other materials provided with the distribution.
45  * 3. All advertising materials mentioning features or use of this software
46  *    must display the following acknowledgement:
47  *      This product includes software developed by Phase One, Inc.
48  * 4. The name of Phase One, Inc. may be used to endorse or promote products
49  *    derived from this software without specific prior written permission.
50  *
51  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
52  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
53  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
54  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
55  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
56  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
57  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
59  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
60  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
61  * SUCH DAMAGE.
62  */
63 
64 #include <sys/types.h>
65 
66 #include <assert.h>
67 #include <errno.h>
68 #include <limits.h>
69 #include <stdbool.h>
70 #include <stddef.h>
71 #include <stdio.h>
72 #include <stdlib.h>
73 #include <string.h>
74 #include <wchar.h>
75 
76 #include "citrus_namespace.h"
77 #include "citrus_types.h"
78 #include "citrus_bcs.h"
79 #include "citrus_module.h"
80 #include "citrus_stdenc.h"
81 #include "citrus_mskanji.h"
82 
83 
84 /* ----------------------------------------------------------------------
85  * private stuffs used by templates
86  */
87 
88 typedef struct _MSKanjiState {
89 	int	 chlen;
90 	char	 ch[2];
91 } _MSKanjiState;
92 
93 typedef struct {
94 	int	 mode;
95 #define MODE_JIS2004	1
96 } _MSKanjiEncodingInfo;
97 
98 #define _CEI_TO_EI(_cei_)		(&(_cei_)->ei)
99 #define _CEI_TO_STATE(_cei_, _func_)	(_cei_)->states.s_##_func_
100 
101 #define _FUNCNAME(m)			_citrus_MSKanji_##m
102 #define _ENCODING_INFO			_MSKanjiEncodingInfo
103 #define _ENCODING_STATE			_MSKanjiState
104 #define _ENCODING_MB_CUR_MAX(_ei_)	2
105 #define _ENCODING_IS_STATE_DEPENDENT	0
106 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_)	0
107 
108 
109 static bool
110 _mskanji1(int c)
111 {
112 
113 	return ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc));
114 }
115 
116 static bool
117 _mskanji2(int c)
118 {
119 
120 	return ((c >= 0x40 && c <= 0x7e) || (c >= 0x80 && c <= 0xfc));
121 }
122 
123 static __inline void
124 /*ARGSUSED*/
125 _citrus_MSKanji_init_state(_MSKanjiEncodingInfo * __restrict ei __unused,
126     _MSKanjiState * __restrict s)
127 {
128 
129 	s->chlen = 0;
130 }
131 
132 #if 0
133 static __inline void
134 /*ARGSUSED*/
135 _citrus_MSKanji_pack_state(_MSKanjiEncodingInfo * __restrict ei __unused,
136     void * __restrict pspriv, const _MSKanjiState * __restrict s)
137 {
138 
139 	memcpy(pspriv, (const void *)s, sizeof(*s));
140 }
141 
142 static __inline void
143 /*ARGSUSED*/
144 _citrus_MSKanji_unpack_state(_MSKanjiEncodingInfo * __restrict ei __unused,
145     _MSKanjiState * __restrict s, const void * __restrict pspriv)
146 {
147 
148 	memcpy((void *)s, pspriv, sizeof(*s));
149 }
150 #endif
151 
152 static int
153 /*ARGSUSED*/
154 _citrus_MSKanji_mbrtowc_priv(_MSKanjiEncodingInfo * __restrict ei,
155     wchar_t * __restrict pwc, char ** __restrict s, size_t n,
156     _MSKanjiState * __restrict psenc, size_t * __restrict nresult)
157 {
158 	char *s0;
159 	wchar_t wchar;
160 	int chlenbak, len;
161 
162 	s0 = *s;
163 
164 	if (s0 == NULL) {
165 		_citrus_MSKanji_init_state(ei, psenc);
166 		*nresult = 0; /* state independent */
167 		return (0);
168 	}
169 
170 	chlenbak = psenc->chlen;
171 
172 	/* make sure we have the first byte in the buffer */
173 	switch (psenc->chlen) {
174 	case 0:
175 		if (n < 1)
176 			goto restart;
177 		psenc->ch[0] = *s0++;
178 		psenc->chlen = 1;
179 		n--;
180 		break;
181 	case 1:
182 		break;
183 	default:
184 		/* illegal state */
185 		goto encoding_error;
186 	}
187 
188 	len = _mskanji1(psenc->ch[0] & 0xff) ? 2 : 1;
189 	while (psenc->chlen < len) {
190 		if (n < 1)
191 			goto restart;
192 		psenc->ch[psenc->chlen] = *s0++;
193 		psenc->chlen++;
194 		n--;
195 	}
196 
197 	*s = s0;
198 
199 	switch (len) {
200 	case 1:
201 		wchar = psenc->ch[0] & 0xff;
202 		break;
203 	case 2:
204 		if (!_mskanji2(psenc->ch[1] & 0xff))
205 			goto encoding_error;
206 		wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
207 		break;
208 	default:
209 		/* illegal state */
210 		goto encoding_error;
211 	}
212 
213 	psenc->chlen = 0;
214 
215 	if (pwc)
216 		*pwc = wchar;
217 	*nresult = wchar ? len - chlenbak : 0;
218 	return (0);
219 
220 encoding_error:
221 	psenc->chlen = 0;
222 	*nresult = (size_t)-1;
223 	return (EILSEQ);
224 
225 restart:
226 	*nresult = (size_t)-2;
227 	*s = s0;
228 	return (0);
229 }
230 
231 
232 static int
233 _citrus_MSKanji_wcrtomb_priv(_MSKanjiEncodingInfo * __restrict ei __unused,
234     char * __restrict s, size_t n, wchar_t wc,
235     _MSKanjiState * __restrict psenc __unused, size_t * __restrict nresult)
236 {
237 	int ret;
238 
239 	/* check invalid sequence */
240 	if (wc & ~0xffff) {
241 		ret = EILSEQ;
242 		goto err;
243 	}
244 
245 	if (wc & 0xff00) {
246 		if (n < 2) {
247 			ret = E2BIG;
248 			goto err;
249 		}
250 
251 		s[0] = (wc >> 8) & 0xff;
252 		s[1] = wc & 0xff;
253 		if (!_mskanji1(s[0] & 0xff) || !_mskanji2(s[1] & 0xff)) {
254 			ret = EILSEQ;
255 			goto err;
256 		}
257 
258 		*nresult = 2;
259 		return (0);
260 	} else {
261 		if (n < 1) {
262 			ret = E2BIG;
263 			goto err;
264 		}
265 
266 		s[0] = wc & 0xff;
267 		if (_mskanji1(s[0] & 0xff)) {
268 			ret = EILSEQ;
269 			goto err;
270 		}
271 
272 		*nresult = 1;
273 		return (0);
274 	}
275 
276 err:
277 	*nresult = (size_t)-1;
278 	return (ret);
279 }
280 
281 
282 static __inline int
283 /*ARGSUSED*/
284 _citrus_MSKanji_stdenc_wctocs(_MSKanjiEncodingInfo * __restrict ei,
285     _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
286 {
287 	_index_t col, row;
288 	int offset;
289 
290 	if ((_wc_t)wc < 0x80) {
291 		/* ISO-646 */
292 		*csid = 0;
293 		*idx = (_index_t)wc;
294 	} else if ((_wc_t)wc < 0x100) {
295 		/* KANA */
296 		*csid = 1;
297 		*idx = (_index_t)wc & 0x7F;
298 	} else {
299 		/* Kanji (containing Gaiji zone) */
300 		/*
301 		 * 94^2 zone (contains a part of Gaiji (0xED40 - 0xEEFC)):
302 		 * 0x8140 - 0x817E -> 0x2121 - 0x215F
303 		 * 0x8180 - 0x819E -> 0x2160 - 0x217E
304 		 * 0x819F - 0x81FC -> 0x2221 - 0x227E
305 		 *
306 		 * 0x8240 - 0x827E -> 0x2321 - 0x235F
307 		 *  ...
308 		 * 0x9F9F - 0x9FFc -> 0x5E21 - 0x5E7E
309 		 *
310 		 * 0xE040 - 0xE07E -> 0x5F21 - 0x5F5F
311 		 *  ...
312 		 * 0xEF9F - 0xEFFC -> 0x7E21 - 0x7E7E
313 		 *
314 		 * extended Gaiji zone:
315 		 * 0xF040 - 0xFCFC
316 		 *
317 		 * JIS X0213-plane2:
318 		 * 0xF040 - 0xF09E -> 0x2121 - 0x217E
319 		 * 0xF140 - 0xF19E -> 0x2321 - 0x237E
320 		 * ...
321 		 * 0xF240 - 0xF29E -> 0x2521 - 0x257E
322 		 *
323 		 * 0xF09F - 0xF0FC -> 0x2821 - 0x287E
324 		 * 0xF29F - 0xF2FC -> 0x2C21 - 0x2C7E
325 		 * ...
326 		 * 0xF44F - 0xF49E -> 0x2F21 - 0x2F7E
327 		 *
328 		 * 0xF49F - 0xF4FC -> 0x6E21 - 0x6E7E
329 		 * ...
330 		 * 0xFC9F - 0xFCFC -> 0x7E21 - 0x7E7E
331 		 */
332 		row = ((_wc_t)wc >> 8) & 0xFF;
333 		col = (_wc_t)wc & 0xFF;
334 		if (!_mskanji1(row) || !_mskanji2(col))
335 			return (EILSEQ);
336 		if ((ei->mode & MODE_JIS2004) == 0 || row < 0xF0) {
337 			*csid = 2;
338 			offset = 0x81;
339 		} else {
340 			*csid = 3;
341 			if ((_wc_t)wc <= 0xF49E) {
342 				offset = (_wc_t)wc >= 0xF29F ||
343 				    ((_wc_t)wc >= 0xF09F &&
344 				    (_wc_t)wc <= 0xF0FC) ? 0xED : 0xF0;
345 			} else
346 				offset = 0xCE;
347 		}
348 		row -= offset;
349 		if (row >= 0x5F)
350 			row -= 0x40;
351 		row = row * 2 + 0x21;
352 		col -= 0x1F;
353 		if (col >= 0x61)
354 			col -= 1;
355 		if (col > 0x7E) {
356 			row += 1;
357 			col -= 0x5E;
358 		}
359 		*idx = ((_index_t)row << 8) | col;
360 	}
361 
362 	return (0);
363 }
364 
365 static __inline int
366 /*ARGSUSED*/
367 _citrus_MSKanji_stdenc_cstowc(_MSKanjiEncodingInfo * __restrict ei,
368     wchar_t * __restrict wc, _csid_t csid, _index_t idx)
369 {
370 	uint32_t col, row;
371 	int offset;
372 
373 	switch (csid) {
374 	case 0:
375 		/* ISO-646 */
376 		if (idx >= 0x80)
377 			return (EILSEQ);
378 		*wc = (wchar_t)idx;
379 		break;
380 	case 1:
381 		/* kana */
382 		if (idx >= 0x80)
383 			return (EILSEQ);
384 		*wc = (wchar_t)idx + 0x80;
385 		break;
386 	case 3:
387 		if ((ei->mode & MODE_JIS2004) == 0)
388 			return (EILSEQ);
389 	/*FALLTHROUGH*/
390 	case 2:
391 		/* kanji */
392 		row = (idx >> 8);
393 		if (row < 0x21)
394 			return (EILSEQ);
395 		if (csid == 3) {
396 			if (row <= 0x2F)
397 				offset = (row == 0x22 || row >= 0x26) ?
398 				    0xED : 0xF0;
399 			else if (row >= 0x4D && row <= 0x7E)
400 				offset = 0xCE;
401 			else
402 				return (EILSEQ);
403 		} else {
404 			if (row > 0x97)
405 				return (EILSEQ);
406 			offset = (row < 0x5F) ? 0x81 : 0xC1;
407 		}
408 		col = idx & 0xFF;
409 		if (col < 0x21 || col > 0x7E)
410 			return (EILSEQ);
411 		row -= 0x21; col -= 0x21;
412 		if ((row & 1) == 0) {
413 			col += 0x40;
414 			if (col >= 0x7F)
415 				col += 1;
416 		} else
417 			col += 0x9F;
418 		row = row / 2 + offset;
419 		*wc = ((wchar_t)row << 8) | col;
420 		break;
421 	default:
422 		return (EILSEQ);
423 	}
424 
425 	return (0);
426 }
427 
428 static __inline int
429 /*ARGSUSED*/
430 _citrus_MSKanji_stdenc_get_state_desc_generic(_MSKanjiEncodingInfo * __restrict ei __unused,
431     _MSKanjiState * __restrict psenc, int * __restrict rstate)
432 {
433 
434 	*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
435 	    _STDENC_SDGEN_INCOMPLETE_CHAR;
436 	return (0);
437 }
438 
439 static int
440 /*ARGSUSED*/
441 _citrus_MSKanji_encoding_module_init(_MSKanjiEncodingInfo *  __restrict ei,
442     const void * __restrict var, size_t lenvar)
443 {
444 	const char *p;
445 
446 	p = var;
447 	memset((void *)ei, 0, sizeof(*ei));
448 	while (lenvar > 0) {
449 		switch (_bcs_toupper(*p)) {
450 		case 'J':
451 			MATCH(JIS2004, ei->mode |= MODE_JIS2004);
452 			break;
453 		}
454 		++p;
455 		--lenvar;
456 	}
457 
458 	return (0);
459 }
460 
461 static void
462 _citrus_MSKanji_encoding_module_uninit(_MSKanjiEncodingInfo *ei __unused)
463 {
464 
465 }
466 
467 /* ----------------------------------------------------------------------
468  * public interface for stdenc
469  */
470 
471 _CITRUS_STDENC_DECLS(MSKanji);
472 _CITRUS_STDENC_DEF_OPS(MSKanji);
473 
474 #include "citrus_stdenc_template.h"
475