1 /* $FreeBSD: head/lib/libiconv_modules/MSKanji/citrus_mskanji.c 281550 2015-04-15 09:09:20Z tijl $ */
2 /*	$NetBSD: citrus_mskanji.c,v 1.13 2008/06/14 16:01:08 tnozaki Exp $	*/
3 
4 /*-
5  * Copyright (c)2002 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  *    ja_JP.SJIS locale table for BSD4.4/rune
32  *    version 1.0
33  *    (C) Sin'ichiro MIYATANI / Phase One, Inc
34  *    May 12, 1995
35  *
36  * Redistribution and use in source and binary forms, with or without
37  * modification, are permitted provided that the following conditions
38  * are met:
39  * 1. Redistributions of source code must retain the above copyright
40  *    notice, this list of conditions and the following disclaimer.
41  * 2. Redistributions in binary form must reproduce the above copyright
42  *    notice, this list of conditions and the following disclaimer in the
43  *    documentation and/or other materials provided with the distribution.
44  * 3. All advertising materials mentioning features or use of this software
45  *    must display the following acknowledgement:
46  *      This product includes software developed by Phase One, Inc.
47  * 4. The name of Phase One, Inc. may be used to endorse or promote products
48  *    derived from this software without specific prior written permission.
49  *
50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60  * SUCH DAMAGE.
61  */
62 
63 
64 #include <sys/cdefs.h>
65 #include <sys/types.h>
66 
67 #include <assert.h>
68 #include <errno.h>
69 #include <limits.h>
70 #include <stdbool.h>
71 #include <stddef.h>
72 #include <stdio.h>
73 #include <stdlib.h>
74 #include <string.h>
75 #include <wchar.h>
76 
77 #include "citrus_namespace.h"
78 #include "citrus_types.h"
79 #include "citrus_bcs.h"
80 #include "citrus_module.h"
81 #include "citrus_stdenc.h"
82 #include "citrus_mskanji.h"
83 
84 
85 /* ----------------------------------------------------------------------
86  * private stuffs used by templates
87  */
88 
89 typedef struct _MSKanjiState {
90 	int	 chlen;
91 	char	 ch[2];
92 } _MSKanjiState;
93 
94 typedef struct {
95 	int	 mode;
96 #define MODE_JIS2004	1
97 } _MSKanjiEncodingInfo;
98 
99 #define _CEI_TO_EI(_cei_)		(&(_cei_)->ei)
100 #define _CEI_TO_STATE(_cei_, _func_)	(_cei_)->states.s_##_func_
101 
102 #define _FUNCNAME(m)			_citrus_MSKanji_##m
103 #define _ENCODING_INFO			_MSKanjiEncodingInfo
104 #define _ENCODING_STATE			_MSKanjiState
105 #define _ENCODING_MB_CUR_MAX(_ei_)	2
106 #define _ENCODING_IS_STATE_DEPENDENT	0
107 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_)	0
108 
109 
110 static bool
111 _mskanji1(int c)
112 {
113 
114 	return ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc));
115 }
116 
117 static bool
118 _mskanji2(int c)
119 {
120 
121 	return ((c >= 0x40 && c <= 0x7e) || (c >= 0x80 && c <= 0xfc));
122 }
123 
124 static __inline void
125 /*ARGSUSED*/
126 _citrus_MSKanji_init_state(_MSKanjiEncodingInfo * __restrict ei __unused,
127     _MSKanjiState * __restrict s)
128 {
129 
130 	s->chlen = 0;
131 }
132 
133 #if 0
134 static __inline void
135 /*ARGSUSED*/
136 _citrus_MSKanji_pack_state(_MSKanjiEncodingInfo * __restrict ei __unused,
137     void * __restrict pspriv, const _MSKanjiState * __restrict s)
138 {
139 
140 	memcpy(pspriv, (const void *)s, sizeof(*s));
141 }
142 
143 static __inline void
144 /*ARGSUSED*/
145 _citrus_MSKanji_unpack_state(_MSKanjiEncodingInfo * __restrict ei __unused,
146     _MSKanjiState * __restrict s, const void * __restrict pspriv)
147 {
148 
149 	memcpy((void *)s, pspriv, sizeof(*s));
150 }
151 #endif
152 
153 static int
154 /*ARGSUSED*/
155 _citrus_MSKanji_mbrtowc_priv(_MSKanjiEncodingInfo * __restrict ei,
156     wchar_t * __restrict pwc, char ** __restrict s, size_t n,
157     _MSKanjiState * __restrict psenc, size_t * __restrict nresult)
158 {
159 	char *s0;
160 	wchar_t wchar;
161 	int chlenbak, len;
162 
163 	s0 = *s;
164 
165 	if (s0 == NULL) {
166 		_citrus_MSKanji_init_state(ei, psenc);
167 		*nresult = 0; /* state independent */
168 		return (0);
169 	}
170 
171 	chlenbak = psenc->chlen;
172 
173 	/* make sure we have the first byte in the buffer */
174 	switch (psenc->chlen) {
175 	case 0:
176 		if (n < 1)
177 			goto restart;
178 		psenc->ch[0] = *s0++;
179 		psenc->chlen = 1;
180 		n--;
181 		break;
182 	case 1:
183 		break;
184 	default:
185 		/* illegal state */
186 		goto encoding_error;
187 	}
188 
189 	len = _mskanji1(psenc->ch[0] & 0xff) ? 2 : 1;
190 	while (psenc->chlen < len) {
191 		if (n < 1)
192 			goto restart;
193 		psenc->ch[psenc->chlen] = *s0++;
194 		psenc->chlen++;
195 		n--;
196 	}
197 
198 	*s = s0;
199 
200 	switch (len) {
201 	case 1:
202 		wchar = psenc->ch[0] & 0xff;
203 		break;
204 	case 2:
205 		if (!_mskanji2(psenc->ch[1] & 0xff))
206 			goto encoding_error;
207 		wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
208 		break;
209 	default:
210 		/* illegal state */
211 		goto encoding_error;
212 	}
213 
214 	psenc->chlen = 0;
215 
216 	if (pwc)
217 		*pwc = wchar;
218 	*nresult = wchar ? len - chlenbak : 0;
219 	return (0);
220 
221 encoding_error:
222 	psenc->chlen = 0;
223 	*nresult = (size_t)-1;
224 	return (EILSEQ);
225 
226 restart:
227 	*nresult = (size_t)-2;
228 	*s = s0;
229 	return (0);
230 }
231 
232 
233 static int
234 _citrus_MSKanji_wcrtomb_priv(_MSKanjiEncodingInfo * __restrict ei __unused,
235     char * __restrict s, size_t n, wchar_t wc,
236     _MSKanjiState * __restrict psenc __unused, size_t * __restrict nresult)
237 {
238 	int ret;
239 
240 	/* check invalid sequence */
241 	if (wc & ~0xffff) {
242 		ret = EILSEQ;
243 		goto err;
244 	}
245 
246 	if (wc & 0xff00) {
247 		if (n < 2) {
248 			ret = E2BIG;
249 			goto err;
250 		}
251 
252 		s[0] = (wc >> 8) & 0xff;
253 		s[1] = wc & 0xff;
254 		if (!_mskanji1(s[0] & 0xff) || !_mskanji2(s[1] & 0xff)) {
255 			ret = EILSEQ;
256 			goto err;
257 		}
258 
259 		*nresult = 2;
260 		return (0);
261 	} else {
262 		if (n < 1) {
263 			ret = E2BIG;
264 			goto err;
265 		}
266 
267 		s[0] = wc & 0xff;
268 		if (_mskanji1(s[0] & 0xff)) {
269 			ret = EILSEQ;
270 			goto err;
271 		}
272 
273 		*nresult = 1;
274 		return (0);
275 	}
276 
277 err:
278 	*nresult = (size_t)-1;
279 	return (ret);
280 }
281 
282 
283 static __inline int
284 /*ARGSUSED*/
285 _citrus_MSKanji_stdenc_wctocs(_MSKanjiEncodingInfo * __restrict ei,
286     _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
287 {
288 	_index_t col, row;
289 	int offset;
290 
291 	if ((_wc_t)wc < 0x80) {
292 		/* ISO-646 */
293 		*csid = 0;
294 		*idx = (_index_t)wc;
295 	} else if ((_wc_t)wc < 0x100) {
296 		/* KANA */
297 		*csid = 1;
298 		*idx = (_index_t)wc & 0x7F;
299 	} else {
300 		/* Kanji (containing Gaiji zone) */
301 		/*
302 		 * 94^2 zone (contains a part of Gaiji (0xED40 - 0xEEFC)):
303 		 * 0x8140 - 0x817E -> 0x2121 - 0x215F
304 		 * 0x8180 - 0x819E -> 0x2160 - 0x217E
305 		 * 0x819F - 0x81FC -> 0x2221 - 0x227E
306 		 *
307 		 * 0x8240 - 0x827E -> 0x2321 - 0x235F
308 		 *  ...
309 		 * 0x9F9F - 0x9FFc -> 0x5E21 - 0x5E7E
310 		 *
311 		 * 0xE040 - 0xE07E -> 0x5F21 - 0x5F5F
312 		 *  ...
313 		 * 0xEF9F - 0xEFFC -> 0x7E21 - 0x7E7E
314 		 *
315 		 * extended Gaiji zone:
316 		 * 0xF040 - 0xFCFC
317 		 *
318 		 * JIS X0213-plane2:
319 		 * 0xF040 - 0xF09E -> 0x2121 - 0x217E
320 		 * 0xF140 - 0xF19E -> 0x2321 - 0x237E
321 		 * ...
322 		 * 0xF240 - 0xF29E -> 0x2521 - 0x257E
323 		 *
324 		 * 0xF09F - 0xF0FC -> 0x2821 - 0x287E
325 		 * 0xF29F - 0xF2FC -> 0x2C21 - 0x2C7E
326 		 * ...
327 		 * 0xF44F - 0xF49E -> 0x2F21 - 0x2F7E
328 		 *
329 		 * 0xF49F - 0xF4FC -> 0x6E21 - 0x6E7E
330 		 * ...
331 		 * 0xFC9F - 0xFCFC -> 0x7E21 - 0x7E7E
332 		 */
333 		row = ((_wc_t)wc >> 8) & 0xFF;
334 		col = (_wc_t)wc & 0xFF;
335 		if (!_mskanji1(row) || !_mskanji2(col))
336 			return (EILSEQ);
337 		if ((ei->mode & MODE_JIS2004) == 0 || row < 0xF0) {
338 			*csid = 2;
339 			offset = 0x81;
340 		} else {
341 			*csid = 3;
342 			if ((_wc_t)wc <= 0xF49E) {
343 				offset = (_wc_t)wc >= 0xF29F ||
344 				    ((_wc_t)wc >= 0xF09F &&
345 				    (_wc_t)wc <= 0xF0FC) ? 0xED : 0xF0;
346 			} else
347 				offset = 0xCE;
348 		}
349 		row -= offset;
350 		if (row >= 0x5F)
351 			row -= 0x40;
352 		row = row * 2 + 0x21;
353 		col -= 0x1F;
354 		if (col >= 0x61)
355 			col -= 1;
356 		if (col > 0x7E) {
357 			row += 1;
358 			col -= 0x5E;
359 		}
360 		*idx = ((_index_t)row << 8) | col;
361 	}
362 
363 	return (0);
364 }
365 
366 static __inline int
367 /*ARGSUSED*/
368 _citrus_MSKanji_stdenc_cstowc(_MSKanjiEncodingInfo * __restrict ei,
369     wchar_t * __restrict wc, _csid_t csid, _index_t idx)
370 {
371 	uint32_t col, row;
372 	int offset;
373 
374 	switch (csid) {
375 	case 0:
376 		/* ISO-646 */
377 		if (idx >= 0x80)
378 			return (EILSEQ);
379 		*wc = (wchar_t)idx;
380 		break;
381 	case 1:
382 		/* kana */
383 		if (idx >= 0x80)
384 			return (EILSEQ);
385 		*wc = (wchar_t)idx + 0x80;
386 		break;
387 	case 3:
388 		if ((ei->mode & MODE_JIS2004) == 0)
389 			return (EILSEQ);
390 	/*FALLTHROUGH*/
391 	case 2:
392 		/* kanji */
393 		row = (idx >> 8);
394 		if (row < 0x21)
395 			return (EILSEQ);
396 		if (csid == 3) {
397 			if (row <= 0x2F)
398 				offset = (row == 0x22 || row >= 0x26) ?
399 				    0xED : 0xF0;
400 			else if (row >= 0x4D && row <= 0x7E)
401 				offset = 0xCE;
402 			else
403 				return (EILSEQ);
404 		} else {
405 			if (row > 0x97)
406 				return (EILSEQ);
407 			offset = (row < 0x5F) ? 0x81 : 0xC1;
408 		}
409 		col = idx & 0xFF;
410 		if (col < 0x21 || col > 0x7E)
411 			return (EILSEQ);
412 		row -= 0x21; col -= 0x21;
413 		if ((row & 1) == 0) {
414 			col += 0x40;
415 			if (col >= 0x7F)
416 				col += 1;
417 		} else
418 			col += 0x9F;
419 		row = row / 2 + offset;
420 		*wc = ((wchar_t)row << 8) | col;
421 		break;
422 	default:
423 		return (EILSEQ);
424 	}
425 
426 	return (0);
427 }
428 
429 static __inline int
430 /*ARGSUSED*/
431 _citrus_MSKanji_stdenc_get_state_desc_generic(_MSKanjiEncodingInfo * __restrict ei __unused,
432     _MSKanjiState * __restrict psenc, int * __restrict rstate)
433 {
434 
435 	*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
436 	    _STDENC_SDGEN_INCOMPLETE_CHAR;
437 	return (0);
438 }
439 
440 static int
441 /*ARGSUSED*/
442 _citrus_MSKanji_encoding_module_init(_MSKanjiEncodingInfo *  __restrict ei,
443     const void * __restrict var, size_t lenvar)
444 {
445 	const char *p;
446 
447 	p = var;
448 	memset((void *)ei, 0, sizeof(*ei));
449 	while (lenvar > 0) {
450 		switch (_bcs_toupper(*p)) {
451 		case 'J':
452 			MATCH(JIS2004, ei->mode |= MODE_JIS2004);
453 			break;
454 		}
455 		++p;
456 		--lenvar;
457 	}
458 
459 	return (0);
460 }
461 
462 static void
463 _citrus_MSKanji_encoding_module_uninit(_MSKanjiEncodingInfo *ei __unused)
464 {
465 
466 }
467 
468 /* ----------------------------------------------------------------------
469  * public interface for stdenc
470  */
471 
472 _CITRUS_STDENC_DECLS(MSKanji);
473 _CITRUS_STDENC_DEF_OPS(MSKanji);
474 
475 #include "citrus_stdenc_template.h"
476