1 /* $NetBSD: citrus_mapper_serial.c,v 1.2 2003/07/12 15:39:20 tshiozak Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause
5 *
6 * Copyright (c)2003 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 #include <sys/cdefs.h>
32 #include <sys/queue.h>
33
34 #include <assert.h>
35 #include <errno.h>
36 #include <limits.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "citrus_namespace.h"
42 #include "citrus_types.h"
43 #include "citrus_bcs.h"
44 #include "citrus_module.h"
45 #include "citrus_region.h"
46 #include "citrus_memstream.h"
47 #include "citrus_mmap.h"
48 #include "citrus_hash.h"
49 #include "citrus_mapper.h"
50 #include "citrus_mapper_serial.h"
51
52 /* ---------------------------------------------------------------------- */
53
54 _CITRUS_MAPPER_DECLS(mapper_serial);
55 _CITRUS_MAPPER_DEF_OPS(mapper_serial);
56
57 #define _citrus_mapper_parallel_mapper_init \
58 _citrus_mapper_serial_mapper_init
59 #define _citrus_mapper_parallel_mapper_uninit \
60 _citrus_mapper_serial_mapper_uninit
61 #define _citrus_mapper_parallel_mapper_init_state \
62 _citrus_mapper_serial_mapper_init_state
63 static int _citrus_mapper_parallel_mapper_convert(
64 struct _citrus_mapper * __restrict, _index_t * __restrict,
65 _index_t, void * __restrict);
66 _CITRUS_MAPPER_DEF_OPS(mapper_parallel);
67 #undef _citrus_mapper_parallel_mapper_init
68 #undef _citrus_mapper_parallel_mapper_uninit
69 #undef _citrus_mapper_parallel_mapper_init_state
70
71
72 /* ---------------------------------------------------------------------- */
73
74 struct maplink {
75 STAILQ_ENTRY(maplink) ml_entry;
76 struct _mapper *ml_mapper;
77 };
78 STAILQ_HEAD(maplist, maplink);
79
80 struct _citrus_mapper_serial {
81 struct maplist sr_mappers;
82 };
83
84 int
_citrus_mapper_serial_mapper_getops(struct _citrus_mapper_ops * ops)85 _citrus_mapper_serial_mapper_getops(struct _citrus_mapper_ops *ops)
86 {
87
88 memcpy(ops, &_citrus_mapper_serial_mapper_ops,
89 sizeof(_citrus_mapper_serial_mapper_ops));
90
91 return (0);
92 }
93
94 int
_citrus_mapper_parallel_mapper_getops(struct _citrus_mapper_ops * ops)95 _citrus_mapper_parallel_mapper_getops(struct _citrus_mapper_ops *ops)
96 {
97
98 memcpy(ops, &_citrus_mapper_parallel_mapper_ops,
99 sizeof(_citrus_mapper_parallel_mapper_ops));
100
101 return (0);
102 }
103
104 static void
uninit(struct _citrus_mapper_serial * sr)105 uninit(struct _citrus_mapper_serial *sr)
106 {
107 struct maplink *ml;
108
109 while ((ml = STAILQ_FIRST(&sr->sr_mappers)) != NULL) {
110 STAILQ_REMOVE_HEAD(&sr->sr_mappers, ml_entry);
111 _mapper_close(ml->ml_mapper);
112 free(ml);
113 }
114 }
115
116 static int
parse_var(struct _citrus_mapper_area * __restrict ma,struct _citrus_mapper_serial * sr,struct _memstream * ms)117 parse_var(struct _citrus_mapper_area *__restrict ma,
118 struct _citrus_mapper_serial *sr, struct _memstream *ms)
119 {
120 struct _region r;
121 struct maplink *ml;
122 char mapname[PATH_MAX];
123 int ret;
124
125 STAILQ_INIT(&sr->sr_mappers);
126 while (1) {
127 /* remove beginning white spaces */
128 _memstream_skip_ws(ms);
129 if (_memstream_iseof(ms))
130 break;
131 /* cut down a mapper name */
132 _memstream_chr(ms, &r, ',');
133 snprintf(mapname, sizeof(mapname), "%.*s",
134 (int)_region_size(&r), (char *)_region_head(&r));
135 /* remove trailing white spaces */
136 mapname[_bcs_skip_nonws(mapname)-mapname] = '\0';
137 /* create a new mapper record */
138 ml = malloc(sizeof(*ml));
139 if (ml == NULL)
140 return (errno);
141 ret = _mapper_open(ma, &ml->ml_mapper, mapname);
142 if (ret) {
143 free(ml);
144 return (ret);
145 }
146 /* support only 1:1 and stateless converter */
147 if (_mapper_get_src_max(ml->ml_mapper) != 1 ||
148 _mapper_get_dst_max(ml->ml_mapper) != 1 ||
149 _mapper_get_state_size(ml->ml_mapper) != 0) {
150 free(ml);
151 return (EINVAL);
152 }
153 STAILQ_INSERT_TAIL(&sr->sr_mappers, ml, ml_entry);
154 }
155 return (0);
156 }
157
158 static int
159 /*ARGSUSED*/
_citrus_mapper_serial_mapper_init(struct _citrus_mapper_area * __restrict ma __unused,struct _citrus_mapper * __restrict cm,const char * __restrict dir __unused,const void * __restrict var,size_t lenvar,struct _citrus_mapper_traits * __restrict mt,size_t lenmt)160 _citrus_mapper_serial_mapper_init(struct _citrus_mapper_area *__restrict ma __unused,
161 struct _citrus_mapper * __restrict cm, const char * __restrict dir __unused,
162 const void * __restrict var, size_t lenvar,
163 struct _citrus_mapper_traits * __restrict mt, size_t lenmt)
164 {
165 struct _citrus_mapper_serial *sr;
166 struct _memstream ms;
167 struct _region r;
168
169 if (lenmt < sizeof(*mt))
170 return (EINVAL);
171
172 sr = malloc(sizeof(*sr));
173 if (sr == NULL)
174 return (errno);
175
176 _region_init(&r, __DECONST(void *, var), lenvar);
177 _memstream_bind(&ms, &r);
178 if (parse_var(ma, sr, &ms)) {
179 uninit(sr);
180 free(sr);
181 return (EINVAL);
182 }
183 cm->cm_closure = sr;
184 mt->mt_src_max = mt->mt_dst_max = 1; /* 1:1 converter */
185 mt->mt_state_size = 0; /* stateless */
186
187 return (0);
188 }
189
190 static void
191 /*ARGSUSED*/
_citrus_mapper_serial_mapper_uninit(struct _citrus_mapper * cm)192 _citrus_mapper_serial_mapper_uninit(struct _citrus_mapper *cm)
193 {
194
195 if (cm && cm->cm_closure) {
196 uninit(cm->cm_closure);
197 free(cm->cm_closure);
198 }
199 }
200
201 static int
202 /*ARGSUSED*/
_citrus_mapper_serial_mapper_convert(struct _citrus_mapper * __restrict cm,_index_t * __restrict dst,_index_t src,void * __restrict ps __unused)203 _citrus_mapper_serial_mapper_convert(struct _citrus_mapper * __restrict cm,
204 _index_t * __restrict dst, _index_t src, void * __restrict ps __unused)
205 {
206 struct _citrus_mapper_serial *sr;
207 struct maplink *ml;
208 int ret;
209
210 sr = cm->cm_closure;
211 STAILQ_FOREACH(ml, &sr->sr_mappers, ml_entry) {
212 ret = _mapper_convert(ml->ml_mapper, &src, src, NULL);
213 if (ret != _MAPPER_CONVERT_SUCCESS)
214 return (ret);
215 }
216 *dst = src;
217 return (_MAPPER_CONVERT_SUCCESS);
218 }
219
220 static int
221 /*ARGSUSED*/
_citrus_mapper_parallel_mapper_convert(struct _citrus_mapper * __restrict cm,_index_t * __restrict dst,_index_t src,void * __restrict ps __unused)222 _citrus_mapper_parallel_mapper_convert(struct _citrus_mapper * __restrict cm,
223 _index_t * __restrict dst, _index_t src, void * __restrict ps __unused)
224 {
225 struct _citrus_mapper_serial *sr;
226 struct maplink *ml;
227 _index_t tmp;
228 int ret;
229
230 sr = cm->cm_closure;
231 STAILQ_FOREACH(ml, &sr->sr_mappers, ml_entry) {
232 ret = _mapper_convert(ml->ml_mapper, &tmp, src, NULL);
233 if (ret == _MAPPER_CONVERT_SUCCESS) {
234 *dst = tmp;
235 return (_MAPPER_CONVERT_SUCCESS);
236 } else if (ret == _MAPPER_CONVERT_ILSEQ)
237 return (_MAPPER_CONVERT_ILSEQ);
238 }
239 return (_MAPPER_CONVERT_NONIDENTICAL);
240 }
241
242 static void
243 /*ARGSUSED*/
_citrus_mapper_serial_mapper_init_state(void)244 _citrus_mapper_serial_mapper_init_state(void)
245 {
246
247 }
248