1/* $FreeBSD$ */
2/*	$NetBSD: citrus_mapper_646.c,v 1.4 2003/07/14 11:37:49 tshiozak Exp $	*/
3
4/*-
5 * Copyright (c)2003 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#include <sys/cdefs.h>
31#include <sys/queue.h>
32
33#include <assert.h>
34#include <errno.h>
35#include <limits.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39
40#include "citrus_namespace.h"
41#include "citrus_types.h"
42#include "citrus_bcs.h"
43#include "citrus_module.h"
44#include "citrus_region.h"
45#include "citrus_memstream.h"
46#include "citrus_mmap.h"
47#include "citrus_hash.h"
48#include "citrus_mapper.h"
49#include "citrus_mapper_646.h"
50
51/* ---------------------------------------------------------------------- */
52
53_CITRUS_MAPPER_DECLS(mapper_646);
54_CITRUS_MAPPER_DEF_OPS(mapper_646);
55
56/* ---------------------------------------------------------------------- */
57
58#define ILSEQ	0xFFFFFFFE
59#define INVALID	0xFFFFFFFF
60#define SPECIALS(x)				\
61	x(0x23)					\
62	x(0x24)					\
63	x(0x40)					\
64	x(0x5B)					\
65	x(0x5C)					\
66	x(0x5D)					\
67	x(0x5E)					\
68	x(0x60)					\
69	x(0x7B)					\
70	x(0x7C)					\
71	x(0x7D)					\
72	x(0x7E)
73
74#define INDEX(x) INDEX_##x,
75
76enum {
77	SPECIALS(INDEX)
78	NUM_OF_SPECIALS
79};
80struct _citrus_mapper_646 {
81	_index_t	 m6_map[NUM_OF_SPECIALS];
82	int		 m6_forward;
83};
84
85int
86_citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops)
87{
88
89	memcpy(ops, &_citrus_mapper_646_mapper_ops,
90	    sizeof(_citrus_mapper_646_mapper_ops));
91
92	return (0);
93}
94
95#define T_COMM '#'
96static int
97parse_file(struct _citrus_mapper_646 *m6, const char *path)
98{
99	struct _memstream ms;
100	struct _region r;
101	const char *p;
102	char *pp;
103	size_t len;
104	char buf[PATH_MAX];
105	int i, ret;
106
107	ret = _map_file(&r, path);
108	if (ret)
109		return (ret);
110	_memstream_bind(&ms, &r);
111	for (i = 0; i < NUM_OF_SPECIALS; i++) {
112retry:
113		p = _memstream_getln(&ms, &len);
114		if (p == NULL) {
115			ret = EINVAL;
116			break;
117		}
118		p = _bcs_skip_ws_len(p, &len);
119		if (*p == T_COMM || len==0)
120			goto retry;
121		if (!_bcs_isdigit(*p)) {
122			ret = EINVAL;
123			break;
124		}
125		snprintf(buf, sizeof(buf), "%.*s", (int)len, p);
126		pp = __DECONST(void *, p);
127		m6->m6_map[i] = strtoul(buf, (char **)&pp, 0);
128		p = _bcs_skip_ws(buf);
129		if (*p != T_COMM && !*p) {
130			ret = EINVAL;
131			break;
132		}
133	}
134	_unmap_file(&r);
135
136	return (ret);
137};
138
139static int
140parse_var(struct _citrus_mapper_646 *m6, struct _memstream *ms,
141    const char *dir)
142{
143	struct _region r;
144	char path[PATH_MAX];
145
146	m6->m6_forward = 1;
147	_memstream_skip_ws(ms);
148	/* whether backward */
149	if (_memstream_peek(ms) == '!') {
150		_memstream_getc(ms);
151		m6->m6_forward = 0;
152	}
153	/* get description file path */
154	_memstream_getregion(ms, &r, _memstream_remainder(ms));
155	snprintf(path, sizeof(path), "%s/%.*s",
156		 dir, (int)_region_size(&r), (char *)_region_head(&r));
157	/* remove trailing white spaces */
158	path[_bcs_skip_nonws(path)-path] = '\0';
159	return (parse_file(m6, path));
160}
161
162static int
163/*ARGSUSED*/
164_citrus_mapper_646_mapper_init(struct _citrus_mapper_area *__restrict ma __unused,
165    struct _citrus_mapper * __restrict cm, const char * __restrict dir,
166    const void * __restrict var, size_t lenvar,
167    struct _citrus_mapper_traits * __restrict mt, size_t lenmt)
168{
169	struct _citrus_mapper_646 *m6;
170	struct _memstream ms;
171	struct _region r;
172	int ret;
173
174	if (lenmt < sizeof(*mt))
175		return (EINVAL);
176
177	m6 = malloc(sizeof(*m6));
178	if (m6 == NULL)
179		return (errno);
180
181	_region_init(&r, __DECONST(void *, var), lenvar);
182	_memstream_bind(&ms, &r);
183	ret = parse_var(m6, &ms, dir);
184	if (ret) {
185		free(m6);
186		return (ret);
187	}
188
189	cm->cm_closure = m6;
190	mt->mt_src_max = mt->mt_dst_max = 1;	/* 1:1 converter */
191	mt->mt_state_size = 0;			/* stateless */
192
193	return (0);
194}
195
196static void
197/*ARGSUSED*/
198_citrus_mapper_646_mapper_uninit(struct _citrus_mapper *cm)
199{
200
201	if (cm && cm->cm_closure)
202		free(cm->cm_closure);
203}
204
205static int
206/*ARGSUSED*/
207_citrus_mapper_646_mapper_convert(struct _citrus_mapper * __restrict cm,
208    _index_t * __restrict dst, _index_t src, void * __restrict ps __unused)
209{
210	struct _citrus_mapper_646 *m6;
211
212	m6 = cm->cm_closure;
213	if (m6->m6_forward) {
214		/* forward */
215		if (src >= 0x80)
216			return (_MAPPER_CONVERT_ILSEQ);
217#define FORWARD(x)					\
218if (src == (x))	{					\
219	if (m6->m6_map[INDEX_##x]==INVALID)		\
220		return (_MAPPER_CONVERT_NONIDENTICAL);	\
221	*dst = m6->m6_map[INDEX_##x];			\
222	return (0);					\
223} else
224		SPECIALS(FORWARD);
225		*dst = src;
226	} else {
227		/* backward */
228#define BACKWARD(x)							\
229if (m6->m6_map[INDEX_##x] != INVALID && src == m6->m6_map[INDEX_##x]) {	\
230	*dst = (x);							\
231	return (0);							\
232} else if (src == (x))							\
233	return (_MAPPER_CONVERT_ILSEQ);					\
234else
235		SPECIALS(BACKWARD);
236		if (src >= 0x80)
237			return (_MAPPER_CONVERT_NONIDENTICAL);
238		*dst = src;
239	}
240
241	return (_MAPPER_CONVERT_SUCCESS);
242}
243
244static void
245/*ARGSUSED*/
246_citrus_mapper_646_mapper_init_state(void)
247{
248
249}
250