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
88typedef struct _MSKanjiState {
89	int	 chlen;
90	char	 ch[2];
91} _MSKanjiState;
92
93typedef 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
109static bool
110_mskanji1(int c)
111{
112
113	return ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc));
114}
115
116static bool
117_mskanji2(int c)
118{
119
120	return ((c >= 0x40 && c <= 0x7e) || (c >= 0x80 && c <= 0xfc));
121}
122
123static __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
133static __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
142static __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
152static 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
220encoding_error:
221	psenc->chlen = 0;
222	*nresult = (size_t)-1;
223	return (EILSEQ);
224
225restart:
226	*nresult = (size_t)-2;
227	*s = s0;
228	return (0);
229}
230
231
232static 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
276err:
277	*nresult = (size_t)-1;
278	return (ret);
279}
280
281
282static __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
365static __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
428static __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
439static 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
461static 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