citrus_johab.c revision 282275 
1/* $FreeBSD: stable/10/lib/libiconv_modules/JOHAB/citrus_johab.c 282275 2015-04-30 16:08:47Z tijl $ */
2/* $NetBSD: citrus_johab.c,v 1.4 2008/06/14 16:01:07 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#include <sys/cdefs.h>
30#include <sys/types.h>
31
32#include <assert.h>
33#include <errno.h>
34#include <limits.h>
35#include <stdbool.h>
36#include <stddef.h>
37#include <stdint.h>
38#include <stdio.h>
39#include <stdlib.h>
40#include <string.h>
41#include <wchar.h>
42
43#include "citrus_namespace.h"
44#include "citrus_types.h"
45#include "citrus_bcs.h"
46#include "citrus_module.h"
47#include "citrus_stdenc.h"
48#include "citrus_johab.h"
49
50/* ----------------------------------------------------------------------
51 * private stuffs used by templates
52 */
53
54typedef struct {
55	int	 chlen;
56	char	 ch[2];
57} _JOHABState;
58
59typedef struct {
60	int	 dummy;
61} _JOHABEncodingInfo;
62
63#define _CEI_TO_EI(_cei_)		(&(_cei_)->ei)
64#define _CEI_TO_STATE(_cei_, _func_)	(_cei_)->states.s_##_func_
65
66#define _FUNCNAME(m)			_citrus_JOHAB_##m
67#define _ENCODING_INFO			_JOHABEncodingInfo
68#define _ENCODING_STATE			_JOHABState
69#define _ENCODING_MB_CUR_MAX(_ei_)		2
70#define _ENCODING_IS_STATE_DEPENDENT		0
71#define _STATE_NEEDS_EXPLICIT_INIT(_ps_)	0
72
73
74static __inline void
75/*ARGSUSED*/
76_citrus_JOHAB_init_state(_JOHABEncodingInfo * __restrict ei __unused,
77    _JOHABState * __restrict psenc)
78{
79
80	psenc->chlen = 0;
81}
82
83#if 0
84static __inline void
85/*ARGSUSED*/
86_citrus_JOHAB_pack_state(_JOHABEncodingInfo * __restrict ei __unused,
87    void * __restrict pspriv, const _JOHABState * __restrict psenc)
88{
89
90	memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
91}
92
93static __inline void
94/*ARGSUSED*/
95_citrus_JOHAB_unpack_state(_JOHABEncodingInfo * __restrict ei __unused,
96    _JOHABState * __restrict psenc, const void * __restrict pspriv)
97{
98
99	memcpy((void *)psenc, pspriv, sizeof(*psenc));
100}
101#endif
102
103static void
104/*ARGSUSED*/
105_citrus_JOHAB_encoding_module_uninit(_JOHABEncodingInfo *ei __unused)
106{
107
108	/* ei may be null */
109}
110
111static int
112/*ARGSUSED*/
113_citrus_JOHAB_encoding_module_init(_JOHABEncodingInfo * __restrict ei __unused,
114    const void * __restrict var __unused, size_t lenvar __unused)
115{
116
117	/* ei may be null */
118	return (0);
119}
120
121static __inline bool
122ishangul(int l, int t)
123{
124
125	return ((l >= 0x84 && l <= 0xD3) &&
126	    ((t >= 0x41 && t <= 0x7E) || (t >= 0x81 && t <= 0xFE)));
127}
128
129static __inline bool
130isuda(int l, int t)
131{
132
133	return ((l == 0xD8) &&
134	    ((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE)));
135}
136
137static __inline bool
138ishanja(int l, int t)
139{
140
141	return (((l >= 0xD9 && l <= 0xDE) || (l >= 0xE0 && l <= 0xF9)) &&
142	    ((t >= 0x31 && t <= 0x7E) || (t >= 0x91 && t <= 0xFE)));
143}
144
145static int
146/*ARGSUSED*/
147_citrus_JOHAB_mbrtowc_priv(_JOHABEncodingInfo * __restrict ei,
148    wchar_t * __restrict pwc, char ** __restrict s, size_t n,
149    _JOHABState * __restrict psenc, size_t * __restrict nresult)
150{
151	char *s0;
152	int l, t;
153
154	if (*s == NULL) {
155		_citrus_JOHAB_init_state(ei, psenc);
156		*nresult = _ENCODING_IS_STATE_DEPENDENT;
157		return (0);
158	}
159	s0 = *s;
160
161	switch (psenc->chlen) {
162	case 0:
163		if (n-- < 1)
164			goto restart;
165		l = *s0++ & 0xFF;
166		if (l <= 0x7F) {
167			if (pwc != NULL)
168				*pwc = (wchar_t)l;
169			*nresult = (l == 0) ? 0 : 1;
170			*s = s0;
171			return (0);
172		}
173		psenc->ch[psenc->chlen++] = l;
174		break;
175	case 1:
176		l = psenc->ch[0] & 0xFF;
177		break;
178	default:
179		return (EINVAL);
180	}
181	if (n-- < 1) {
182restart:
183		*nresult = (size_t)-2;
184		*s = s0;
185		return (0);
186	}
187	t = *s0++ & 0xFF;
188	if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t)) {
189		*nresult = (size_t)-1;
190		return (EILSEQ);
191	}
192	if (pwc != NULL)
193		*pwc = (wchar_t)(l << 8 | t);
194	*nresult = s0 - *s;
195	*s = s0;
196	psenc->chlen = 0;
197
198	return (0);
199}
200
201static int
202/*ARGSUSED*/
203_citrus_JOHAB_wcrtomb_priv(_JOHABEncodingInfo * __restrict ei __unused,
204    char * __restrict s, size_t n, wchar_t wc,
205    _JOHABState * __restrict psenc, size_t * __restrict nresult)
206{
207	int l, t;
208
209	if (psenc->chlen != 0)
210		return (EINVAL);
211
212	/* XXX assume wchar_t as int */
213	if ((uint32_t)wc <= 0x7F) {
214		if (n < 1)
215			goto e2big;
216		*s = wc & 0xFF;
217		*nresult = 1;
218	} else if ((uint32_t)wc <= 0xFFFF) {
219		if (n < 2) {
220e2big:
221			*nresult = (size_t)-1;
222			return (E2BIG);
223		}
224		l = (wc >> 8) & 0xFF;
225		t = wc & 0xFF;
226		if (!ishangul(l, t) && !isuda(l, t) && !ishanja(l, t))
227			goto ilseq;
228		*s++ = l;
229		*s = t;
230		*nresult = 2;
231	} else {
232ilseq:
233		*nresult = (size_t)-1;
234		return (EILSEQ);
235	}
236	return (0);
237
238}
239
240static __inline int
241/*ARGSUSED*/
242_citrus_JOHAB_stdenc_wctocs(_JOHABEncodingInfo * __restrict ei __unused,
243    _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
244{
245	int m, l, linear, t;
246
247	/* XXX assume wchar_t as int */
248	if ((uint32_t)wc <= 0x7F) {
249		*idx = (_index_t)wc;
250		*csid = 0;
251	} else if ((uint32_t)wc <= 0xFFFF) {
252		l = (wc >> 8) & 0xFF;
253		t = wc & 0xFF;
254		if (ishangul(l, t) || isuda(l, t)) {
255			*idx = (_index_t)wc;
256			*csid = 1;
257		} else {
258			if (l >= 0xD9 && l <= 0xDE) {
259				linear = l - 0xD9;
260				m = 0x21;
261			} else if (l >= 0xE0 && l <= 0xF9) {
262				linear = l - 0xE0;
263				m = 0x4A;
264			} else
265				return (EILSEQ);
266			linear *= 188;
267			if (t >= 0x31 && t <= 0x7E)
268				linear += t - 0x31;
269			else if (t >= 0x91 && t <= 0xFE)
270				linear += t - 0x43;
271			else
272				return (EILSEQ);
273			l = (linear / 94) + m;
274			t = (linear % 94) + 0x21;
275			*idx = (_index_t)((l << 8) | t);
276			*csid = 2;
277		}
278	} else
279		return (EILSEQ);
280	return (0);
281}
282
283static __inline int
284/*ARGSUSED*/
285_citrus_JOHAB_stdenc_cstowc(_JOHABEncodingInfo * __restrict ei __unused,
286    wchar_t * __restrict wc, _csid_t csid, _index_t idx)
287{
288	int m, n, l, linear, t;
289
290	switch (csid) {
291	case 0:
292	case 1:
293		*wc = (wchar_t)idx;
294		break;
295	case 2:
296		if (idx >= 0x2121 && idx <= 0x2C71) {
297			m = 0xD9;
298			n = 0x21;
299		} else if (idx >= 0x4A21 && idx <= 0x7D7E) {
300			m = 0xE0;
301			n = 0x4A;
302		} else
303			return (EILSEQ);
304		l = ((idx >> 8) & 0xFF) - n;
305		t = (idx & 0xFF) - 0x21;
306		linear = (l * 94) + t;
307		l = (linear / 188) + m;
308		t = linear % 188;
309		t += (t <= 0x4D) ? 0x31 : 0x43;
310		break;
311	default:
312		return (EILSEQ);
313	}
314	return (0);
315}
316
317static __inline int
318/*ARGSUSED*/
319_citrus_JOHAB_stdenc_get_state_desc_generic(_JOHABEncodingInfo * __restrict ei __unused,
320    _JOHABState * __restrict psenc, int * __restrict rstate)
321{
322
323	*rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
324	    _STDENC_SDGEN_INCOMPLETE_CHAR;
325	return (0);
326}
327
328/* ----------------------------------------------------------------------
329 * public interface for stdenc
330 */
331
332_CITRUS_STDENC_DECLS(JOHAB);
333_CITRUS_STDENC_DEF_OPS(JOHAB);
334
335#include "citrus_stdenc_template.h"
336