citrus_none.c revision 282275 
1/* $FreeBSD: stable/10/lib/libc/iconv/citrus_none.c 282275 2015-04-30 16:08:47Z tijl $ */
2/* $NetBSD: citrus_none.c,v 1.18 2008/06/14 16:01:07 tnozaki Exp $ */
3
4/*-
5 * Copyright (c) 2002 Citrus Project,
6 * Copyright (c) 2010 Gabor Kovesdan <gabor@FreeBSD.org>,
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#include <sys/cdefs.h>
32#include <sys/types.h>
33
34#include <assert.h>
35#include <errno.h>
36#include <iconv.h>
37#include <stddef.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_module.h"
46#include "citrus_none.h"
47#include "citrus_stdenc.h"
48
49_CITRUS_STDENC_DECLS(NONE);
50_CITRUS_STDENC_DEF_OPS(NONE);
51struct _citrus_stdenc_traits _citrus_NONE_stdenc_traits = {
52	0,	/* et_state_size */
53	1,	/* mb_cur_max */
54};
55
56static int
57_citrus_NONE_stdenc_init(struct _citrus_stdenc * __restrict ce,
58    const void *var __unused, size_t lenvar __unused,
59    struct _citrus_stdenc_traits * __restrict et)
60{
61
62	et->et_state_size = 0;
63	et->et_mb_cur_max = 1;
64
65	ce->ce_closure = NULL;
66
67	return (0);
68}
69
70static void
71_citrus_NONE_stdenc_uninit(struct _citrus_stdenc *ce __unused)
72{
73
74}
75
76static int
77_citrus_NONE_stdenc_init_state(struct _citrus_stdenc * __restrict ce __unused,
78    void * __restrict ps __unused)
79{
80
81	return (0);
82}
83
84static int
85_citrus_NONE_stdenc_mbtocs(struct _citrus_stdenc * __restrict ce __unused,
86    _csid_t *csid, _index_t *idx, char **s, size_t n,
87    void *ps __unused, size_t *nresult, struct iconv_hooks *hooks)
88{
89
90	if (n < 1) {
91		*nresult = (size_t)-2;
92		return (0);
93	}
94
95	*csid = 0;
96	*idx = (_index_t)(unsigned char)*(*s)++;
97	*nresult = *idx == 0 ? 0 : 1;
98
99	if ((hooks != NULL) && (hooks->uc_hook != NULL))
100		hooks->uc_hook((unsigned int)*idx, hooks->data);
101
102	return (0);
103}
104
105static int
106_citrus_NONE_stdenc_cstomb(struct _citrus_stdenc * __restrict ce __unused,
107    char *s, size_t n, _csid_t csid, _index_t idx, void *ps __unused,
108    size_t *nresult, struct iconv_hooks *hooks __unused)
109{
110
111	if (csid == _CITRUS_CSID_INVALID) {
112		*nresult = 0;
113		return (0);
114	}
115	if (csid != 0)
116		return (EILSEQ);
117
118	if ((idx & 0x000000FF) == idx) {
119		if (n < 1) {
120			*nresult = (size_t)-1;
121			return (E2BIG);
122		}
123		*s = (char)idx;
124		*nresult = 1;
125	} else if ((idx & 0x0000FFFF) == idx) {
126		if (n < 2) {
127			*nresult = (size_t)-1;
128			return (E2BIG);
129		}
130		s[0] = (char)idx;
131		/* XXX: might be endian dependent */
132		s[1] = (char)(idx >> 8);
133		*nresult = 2;
134	} else if ((idx & 0x00FFFFFF) == idx) {
135		if (n < 3) {
136			*nresult = (size_t)-1;
137			return (E2BIG);
138		}
139		s[0] = (char)idx;
140		/* XXX: might be endian dependent */
141		s[1] = (char)(idx >> 8);
142		s[2] = (char)(idx >> 16);
143		*nresult = 3;
144	} else {
145		if (n < 3) {
146			*nresult = (size_t)-1;
147			return (E2BIG);
148		}
149		s[0] = (char)idx;
150		/* XXX: might be endian dependent */
151		s[1] = (char)(idx >> 8);
152		s[2] = (char)(idx >> 16);
153		s[3] = (char)(idx >> 24);
154		*nresult = 4;
155	}
156
157	return (0);
158}
159
160static int
161_citrus_NONE_stdenc_mbtowc(struct _citrus_stdenc * __restrict ce __unused,
162    _wc_t * __restrict pwc, char ** __restrict s, size_t n,
163    void * __restrict pspriv __unused, size_t * __restrict nresult,
164    struct iconv_hooks *hooks)
165{
166
167	if (s == NULL) {
168		*nresult = 0;
169		return (0);
170	}
171	if (n == 0) {
172		*nresult = (size_t)-2;
173		return (0);
174	}
175
176	if (pwc != NULL)
177		*pwc = (_wc_t)(unsigned char) **s;
178
179	*nresult = *s == '\0' ? 0 : 1;
180
181	if ((hooks != NULL) && (hooks->wc_hook != NULL))
182		hooks->wc_hook(*pwc, hooks->data);
183
184	return (0);
185}
186
187static int
188_citrus_NONE_stdenc_wctomb(struct _citrus_stdenc * __restrict ce __unused,
189    char * __restrict s, size_t n, _wc_t wc,
190    void * __restrict pspriv __unused, size_t * __restrict nresult,
191    struct iconv_hooks *hooks __unused)
192{
193
194	if ((wc & ~0xFFU) != 0) {
195		*nresult = (size_t)-1;
196		return (EILSEQ);
197	}
198	if (n == 0) {
199		*nresult = (size_t)-1;
200		return (E2BIG);
201	}
202
203	*nresult = 1;
204	if (s != NULL && n > 0)
205		*s = (char)wc;
206
207	return (0);
208}
209
210static int
211_citrus_NONE_stdenc_put_state_reset(struct _citrus_stdenc * __restrict ce __unused,
212    char * __restrict s __unused, size_t n __unused,
213    void * __restrict pspriv __unused, size_t * __restrict nresult)
214{
215
216	*nresult = 0;
217
218	return (0);
219}
220
221static int
222_citrus_NONE_stdenc_get_state_desc(struct _stdenc * __restrict ce __unused,
223    void * __restrict ps __unused, int id,
224    struct _stdenc_state_desc * __restrict d)
225{
226	int ret = 0;
227
228	switch (id) {
229	case _STDENC_SDID_GENERIC:
230		d->u.generic.state = _STDENC_SDGEN_INITIAL;
231		break;
232	default:
233		ret = EOPNOTSUPP;
234	}
235
236	return (ret);
237}
238