1/* $FreeBSD$ */
2/*	$NetBSD: citrus_mskanji.c,v 1.13 2008/06/14 16:01:08 tnozaki Exp $	*/
3
4/*-
5 * SPDX-License-Identifier: BSD-2-Clause
6 *
7 * Copyright (c)2002 Citrus Project,
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32/*
33 *    ja_JP.SJIS locale table for BSD4.4/rune
34 *    version 1.0
35 *    (C) Sin'ichiro MIYATANI / Phase One, Inc
36 *    May 12, 1995
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 *    notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 *    notice, this list of conditions and the following disclaimer in the
45 *    documentation and/or other materials provided with the distribution.
46 * 3. All advertising materials mentioning features or use of this software
47 *    must display the following acknowledgement:
48 *      This product includes software developed by Phase One, Inc.
49 * 4. The name of Phase One, Inc. may be used to endorse or promote products
50 *    derived from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 */
64
65
66#include <sys/cdefs.h>
67#include <sys/types.h>
68
69#include <assert.h>
70#include <errno.h>
71#include <limits.h>
72#include <stdbool.h>
73#include <stddef.h>
74#include <stdio.h>
75#include <stdlib.h>
76#include <string.h>
77#include <wchar.h>
78
79#include "citrus_namespace.h"
80#include "citrus_types.h"
81#include "citrus_bcs.h"
82#include "citrus_module.h"
83#include "citrus_stdenc.h"
84#include "citrus_mskanji.h"
85
86
87/* ----------------------------------------------------------------------
88 * private stuffs used by templates
89 */
90
91typedef struct _MSKanjiState {
92	int	 chlen;
93	char	 ch[2];
94} _MSKanjiState;
95
96typedef struct {
97	int	 mode;
98#define MODE_JIS2004	1
99} _MSKanjiEncodingInfo;
100
101#define _CEI_TO_EI(_cei_)		(&(_cei_)->ei)
102#define _CEI_TO_STATE(_cei_, _func_)	(_cei_)->states.s_##_func_
103
104#define _FUNCNAME(m)			_citrus_MSKanji_##m
105#define _ENCODING_INFO			_MSKanjiEncodingInfo
106#define _ENCODING_STATE			_MSKanjiState
107#define _ENCODING_MB_CUR_MAX(_ei_)	2
108#define _ENCODING_IS_STATE_DEPENDENT	0
109#define _STATE_NEEDS_EXPLICIT_INIT(_ps_)	0
110
111
112static bool
113_mskanji1(int c)
114{
115
116	return ((c >= 0x81 && c <= 0x9f) || (c >= 0xe0 && c <= 0xfc));
117}
118
119static bool
120_mskanji2(int c)
121{
122
123	return ((c >= 0x40 && c <= 0x7e) || (c >= 0x80 && c <= 0xfc));
124}
125
126static __inline void
127/*ARGSUSED*/
128_citrus_MSKanji_init_state(_MSKanjiEncodingInfo * __restrict ei __unused,
129    _MSKanjiState * __restrict s)
130{
131
132	s->chlen = 0;
133}
134
135#if 0
136static __inline void
137/*ARGSUSED*/
138_citrus_MSKanji_pack_state(_MSKanjiEncodingInfo * __restrict ei __unused,
139    void * __restrict pspriv, const _MSKanjiState * __restrict s)
140{
141
142	memcpy(pspriv, (const void *)s, sizeof(*s));
143}
144
145static __inline void
146/*ARGSUSED*/
147_citrus_MSKanji_unpack_state(_MSKanjiEncodingInfo * __restrict ei __unused,
148    _MSKanjiState * __restrict s, const void * __restrict pspriv)
149{
150
151	memcpy((void *)s, pspriv, sizeof(*s));
152}
153#endif
154
155static int
156/*ARGSUSED*/
157_citrus_MSKanji_mbrtowc_priv(_MSKanjiEncodingInfo * __restrict ei,
158    wchar_t * __restrict pwc, char ** __restrict s, size_t n,
159    _MSKanjiState * __restrict psenc, size_t * __restrict nresult)
160{
161	char *s0;
162	wchar_t wchar;
163	int chlenbak, len;
164
165	s0 = *s;
166
167	if (s0 == NULL) {
168		_citrus_MSKanji_init_state(ei, psenc);
169		*nresult = 0; /* state independent */
170		return (0);
171	}
172
173	chlenbak = psenc->chlen;
174
175	/* make sure we have the first byte in the buffer */
176	switch (psenc->chlen) {
177	case 0:
178		if (n < 1)
179			goto restart;
180		psenc->ch[0] = *s0++;
181		psenc->chlen = 1;
182		n--;
183		break;
184	case 1:
185		break;
186	default:
187		/* illegal state */
188		goto encoding_error;
189	}
190
191	len = _mskanji1(psenc->ch[0] & 0xff) ? 2 : 1;
192	while (psenc->chlen < len) {
193		if (n < 1)
194			goto restart;
195		psenc->ch[psenc->chlen] = *s0++;
196		psenc->chlen++;
197		n--;
198	}
199
200	*s = s0;
201
202	switch (len) {
203	case 1:
204		wchar = psenc->ch[0] & 0xff;
205		break;
206	case 2:
207		if (!_mskanji2(psenc->ch[1] & 0xff))
208			goto encoding_error;
209		wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
210		break;
211	default:
212		/* illegal state */
213		goto encoding_error;
214	}
215
216	psenc->chlen = 0;
217
218	if (pwc)
219		*pwc = wchar;
220	*nresult = wchar ? len - chlenbak : 0;
221	return (0);
222
223encoding_error:
224	psenc->chlen = 0;
225	*nresult = (size_t)-1;
226	return (EILSEQ);
227
228restart:
229	*nresult = (size_t)-2;
230	*s = s0;
231	return (0);
232}
233
234
235static int
236_citrus_MSKanji_wcrtomb_priv(_MSKanjiEncodingInfo * __restrict ei __unused,
237    char * __restrict s, size_t n, wchar_t wc,
238    _MSKanjiState * __restrict psenc __unused, size_t * __restrict nresult)
239{
240	int ret;
241
242	/* check invalid sequence */
243	if (wc & ~0xffff) {
244		ret = EILSEQ;
245		goto err;
246	}
247
248	if (wc & 0xff00) {
249		if (n < 2) {
250			ret = E2BIG;
251			goto err;
252		}
253
254		s[0] = (wc >> 8) & 0xff;
255		s[1] = wc & 0xff;
256		if (!_mskanji1(s[0] & 0xff) || !_mskanji2(s[1] & 0xff)) {
257			ret = EILSEQ;
258			goto err;
259		}
260
261		*nresult = 2;
262		return (0);
263	} else {
264		if (n < 1) {
265			ret = E2BIG;
266			goto err;
267		}
268
269		s[0] = wc & 0xff;
270		if (_mskanji1(s[0] & 0xff)) {
271			ret = EILSEQ;
272			goto err;
273		}
274
275		*nresult = 1;
276		return (0);
277	}
278
279err:
280	*nresult = (size_t)-1;
281	return (ret);
282}
283
284
285static __inline int
286/*ARGSUSED*/
287_citrus_MSKanji_stdenc_wctocs(_MSKanjiEncodingInfo * __restrict ei,
288    _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
289{
290	_index_t col, row;
291	int offset;
292
293	if ((_wc_t)wc < 0x80) {
294		/* ISO-646 */
295		*csid = 0;
296		*idx = (_index_t)wc;
297	} else if ((_wc_t)wc < 0x100) {
298		/* KANA */
299		*csid = 1;
300		*idx = (_index_t)wc & 0x7F;
301	} else {
302		/* Kanji (containing Gaiji zone) */
303		/*
304		 * 94^2 zone (contains a part of Gaiji (0xED40 - 0xEEFC)):
305		 * 0x8140 - 0x817E -> 0x2121 - 0x215F
306		 * 0x8180 - 0x819E -> 0x2160 - 0x217E
307		 * 0x819F - 0x81FC -> 0x2221 - 0x227E
308		 *
309		 * 0x8240 - 0x827E -> 0x2321 - 0x235F
310		 *  ...
311		 * 0x9F9F - 0x9FFc -> 0x5E21 - 0x5E7E
312		 *
313		 * 0xE040 - 0xE07E -> 0x5F21 - 0x5F5F
314		 *  ...
315		 * 0xEF9F - 0xEFFC -> 0x7E21 - 0x7E7E
316		 *
317		 * extended Gaiji zone:
318		 * 0xF040 - 0xFCFC
319		 *
320		 * JIS X0213-plane2:
321		 * 0xF040 - 0xF09E -> 0x2121 - 0x217E
322		 * 0xF140 - 0xF19E -> 0x2321 - 0x237E
323		 * ...
324		 * 0xF240 - 0xF29E -> 0x2521 - 0x257E
325		 *
326		 * 0xF09F - 0xF0FC -> 0x2821 - 0x287E
327		 * 0xF29F - 0xF2FC -> 0x2C21 - 0x2C7E
328		 * ...
329		 * 0xF44F - 0xF49E -> 0x2F21 - 0x2F7E
330		 *
331		 * 0xF49F - 0xF4FC -> 0x6E21 - 0x6E7E
332		 * ...
333		 * 0xFC9F - 0xFCFC -> 0x7E21 - 0x7E7E
334		 */
335		row = ((_wc_t)wc >> 8) & 0xFF;
336		col = (_wc_t)wc & 0xFF;
337		if (!_mskanji1(row) || !_mskanji2(col))
338			return (EILSEQ);
339		if ((ei->mode & MODE_JIS2004) == 0 || row < 0xF0) {
340			*csid = 2;
341			offset = 0x81;
342		} else {
343			*csid = 3;
344			if ((_wc_t)wc <= 0xF49E) {
345				offset = (_wc_t)wc >= 0xF29F ||
346				    ((_wc_t)wc >= 0xF09F &&
347				    (_wc_t)wc <= 0xF0FC) ? 0xED : 0xF0;
348			} else
349				offset = 0xCE;
350		}
351		row -= offset;
352		if (row >= 0x5F)
353			row -= 0x40;
354		row = row * 2 + 0x21;
355		col -= 0x1F;
356		if (col >= 0x61)
357			col -= 1;
358		if (col > 0x7E) {
359			row += 1;
360			col -= 0x5E;
361		}
362		*idx = ((_index_t)row << 8) | col;
363	}
364
365	return (0);
366}
367
368static __inline int
369/*ARGSUSED*/
370_citrus_MSKanji_stdenc_cstowc(_MSKanjiEncodingInfo * __restrict ei,
371    wchar_t * __restrict wc, _csid_t csid, _index_t idx)
372{
373	uint32_t col, row;
374	int offset;
375
376	switch (csid) {
377	case 0:
378		/* ISO-646 */
379		if (idx >= 0x80)
380			return (EILSEQ);
381		*wc = (wchar_t)idx;
382		break;
383	case 1:
384		/* kana */
385		if (idx >= 0x80)
386			return (EILSEQ);
387		*wc = (wchar_t)idx + 0x80;
388		break;
389	case 3:
390		if ((ei->mode & MODE_JIS2004) == 0)
391			return (EILSEQ);
392	/*FALLTHROUGH*/
393	case 2:
394		/* kanji */
395		row = (idx >> 8);
396		if (row < 0x21)
397			return (EILSEQ);
398		if (csid == 3) {
399			if (row <= 0x2F)
400				offset = (row == 0x22 || row >= 0x26) ?
401				    0xED : 0xF0;
402			else if (row >= 0x4D && row <= 0x7E)
403				offset = 0xCE;
404			else
405				return (EILSEQ);
406		} else {
407			if (row > 0x97)
408				return (EILSEQ);
409			offset = (row < 0x5F) ? 0x81 : 0xC1;
410		}
411		col = idx & 0xFF;
412		if (col < 0x21 || col > 0x7E)
413			return (EILSEQ);
414		row -= 0x21; col -= 0x21;
415		if ((row & 1) == 0) {
416			col += 0x40;
417			if (col >= 0x7F)
418				col += 1;
419		} else
420			col += 0x9F;
421		row = row / 2 + offset;
422		*wc = ((wchar_t)row << 8) | col;
423		break;
424	default:
425		return (EILSEQ);
426	}
427
428	return (0);
429}
430
431static __inline int
432/*ARGSUSED*/
433_citrus_MSKanji_stdenc_get_state_desc_generic(_MSKanjiEncodingInfo * __restrict ei __unused,
434    _MSKanjiState * __restrict psenc, int * __restrict rstate)
435{
436
437	*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
438	    _STDENC_SDGEN_INCOMPLETE_CHAR;
439	return (0);
440}
441
442static int
443/*ARGSUSED*/
444_citrus_MSKanji_encoding_module_init(_MSKanjiEncodingInfo *  __restrict ei,
445    const void * __restrict var, size_t lenvar)
446{
447	const char *p;
448
449	p = var;
450	memset((void *)ei, 0, sizeof(*ei));
451	while (lenvar > 0) {
452		switch (_bcs_toupper(*p)) {
453		case 'J':
454			MATCH(JIS2004, ei->mode |= MODE_JIS2004);
455			break;
456		}
457		++p;
458		--lenvar;
459	}
460
461	return (0);
462}
463
464static void
465_citrus_MSKanji_encoding_module_uninit(_MSKanjiEncodingInfo *ei __unused)
466{
467
468}
469
470/* ----------------------------------------------------------------------
471 * public interface for stdenc
472 */
473
474_CITRUS_STDENC_DECLS(MSKanji);
475_CITRUS_STDENC_DEF_OPS(MSKanji);
476
477#include "citrus_stdenc_template.h"
478