lib/libiconv_modules/mapper_646/citrus_mapper_646.c

   1 /* $FreeBSD$ */
   2 /*      $NetBSD: citrus_mapper_646.c,v 1.4 2003/07/14 11:37:49 tshiozak Exp $   */
   3
   4 /*-
   5  * SPDX-License-Identifier: BSD-2-Clause
   6  *
   7  * Copyright (c)2003 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 #include <sys/cdefs.h>
  33 #include <sys/queue.h>
  34
  35 #include <assert.h>
  36 #include <errno.h>
  37 #include <limits.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41
  42 #include "citrus_namespace.h"
  43 #include "citrus_types.h"
  44 #include "citrus_bcs.h"
  45 #include "citrus_module.h"
  46 #include "citrus_region.h"
  47 #include "citrus_memstream.h"
  48 #include "citrus_mmap.h"
  49 #include "citrus_hash.h"
  50 #include "citrus_mapper.h"
  51 #include "citrus_mapper_646.h"
  52
  53 /* ---------------------------------------------------------------------- */
  54
  55 _CITRUS_MAPPER_DECLS(mapper_646);
  56 _CITRUS_MAPPER_DEF_OPS(mapper_646);
  57
  58 /* ---------------------------------------------------------------------- */
  59
  60 #define ILSEQ   0xFFFFFFFE
  61 #define INVALID 0xFFFFFFFF
  62 #define SPECIALS(x)                             \
  63         x(0x23)                                 \
  64         x(0x24)                                 \
  65         x(0x40)                                 \
  66         x(0x5B)                                 \
  67         x(0x5C)                                 \
  68         x(0x5D)                                 \
  69         x(0x5E)                                 \
  70         x(0x60)                                 \
  71         x(0x7B)                                 \
  72         x(0x7C)                                 \
  73         x(0x7D)                                 \
  74         x(0x7E)
  75
  76 #define INDEX(x) INDEX_##x,
  77
  78 enum {
  79         SPECIALS(INDEX)
  80         NUM_OF_SPECIALS
  81 };
  82 struct _citrus_mapper_646 {
  83         _index_t         m6_map[NUM_OF_SPECIALS];
  84         int              m6_forward;
  85 };
  86
  87 int
  88 _citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops)
  89 {
  90
  91         memcpy(ops, &_citrus_mapper_646_mapper_ops,
  92             sizeof(_citrus_mapper_646_mapper_ops));
  93
  94         return (0);
  95 }
  96
  97 #define T_COMM '#'
  98 static int
  99 parse_file(struct _citrus_mapper_646 *m6, const char *path)
 100 {
 101         struct _memstream ms;
 102         struct _region r;
 103         const char *p;
 104         char *pp;
 105         size_t len;
 106         char buf[PATH_MAX];
 107         int i, ret;
 108
 109         ret = _map_file(&r, path);
 110         if (ret)
 111                 return (ret);
 112         _memstream_bind(&ms, &r);
 113         for (i = 0; i < NUM_OF_SPECIALS; i++) {
 114 retry:
 115                 p = _memstream_getln(&ms, &len);
 116                 if (p == NULL) {
 117                         ret = EINVAL;
 118                         break;
 119                 }
 120                 p = _bcs_skip_ws_len(p, &len);
 121                 if (*p == T_COMM || len==0)
 122                         goto retry;
 123                 if (!_bcs_isdigit(*p)) {
 124                         ret = EINVAL;
 125                         break;
 126                 }
 127                 snprintf(buf, sizeof(buf), "%.*s", (int)len, p);
 128                 pp = __DECONST(void *, p);
 129                 m6->m6_map[i] = strtoul(buf, (char **)&pp, 0);
 130                 p = _bcs_skip_ws(buf);
 131                 if (*p != T_COMM && !*p) {
 132                         ret = EINVAL;
 133                         break;
 134                 }
 135         }
 136         _unmap_file(&r);
 137
 138         return (ret);
 139 };
 140
 141 static int
 142 parse_var(struct _citrus_mapper_646 *m6, struct _memstream *ms,
 143     const char *dir)
 144 {
 145         struct _region r;
 146         char path[PATH_MAX];
 147
 148         m6->m6_forward = 1;
 149         _memstream_skip_ws(ms);
 150         /* whether backward */
 151         if (_memstream_peek(ms) == '!') {
 152                 _memstream_getc(ms);
 153                 m6->m6_forward = 0;
 154         }
 155         /* get description file path */
 156         _memstream_getregion(ms, &r, _memstream_remainder(ms));
 157         snprintf(path, sizeof(path), "%s/%.*s",
 158                  dir, (int)_region_size(&r), (char *)_region_head(&r));
 159         /* remove trailing white spaces */
 160         path[_bcs_skip_nonws(path)-path] = '\0';
 161         return (parse_file(m6, path));
 162 }
 163
 164 static int
 165 /*ARGSUSED*/
 166 _citrus_mapper_646_mapper_init(struct _citrus_mapper_area *__restrict ma __unused,
 167     struct _citrus_mapper * __restrict cm, const char * __restrict dir,
 168     const void * __restrict var, size_t lenvar,
 169     struct _citrus_mapper_traits * __restrict mt, size_t lenmt)
 170 {
 171         struct _citrus_mapper_646 *m6;
 172         struct _memstream ms;
 173         struct _region r;
 174         int ret;
 175
 176         if (lenmt < sizeof(*mt))
 177                 return (EINVAL);
 178
 179         m6 = malloc(sizeof(*m6));
 180         if (m6 == NULL)
 181                 return (errno);
 182
 183         _region_init(&r, __DECONST(void *, var), lenvar);
 184         _memstream_bind(&ms, &r);
 185         ret = parse_var(m6, &ms, dir);
 186         if (ret) {
 187                 free(m6);
 188                 return (ret);
 189         }
 190
 191         cm->cm_closure = m6;
 192         mt->mt_src_max = mt->mt_dst_max = 1;    /* 1:1 converter */
 193         mt->mt_state_size = 0;                  /* stateless */
 194
 195         return (0);
 196 }
 197
 198 static void
 199 /*ARGSUSED*/
 200 _citrus_mapper_646_mapper_uninit(struct _citrus_mapper *cm)
 201 {
 202
 203         if (cm && cm->cm_closure)
 204                 free(cm->cm_closure);
 205 }
 206
 207 static int
 208 /*ARGSUSED*/
 209 _citrus_mapper_646_mapper_convert(struct _citrus_mapper * __restrict cm,
 210     _index_t * __restrict dst, _index_t src, void * __restrict ps __unused)
 211 {
 212         struct _citrus_mapper_646 *m6;
 213
 214         m6 = cm->cm_closure;
 215         if (m6->m6_forward) {
 216                 /* forward */
 217                 if (src >= 0x80)
 218                         return (_MAPPER_CONVERT_ILSEQ);
 219 #define FORWARD(x)                                      \
 220 if (src == (x)) {                                       \
 221         if (m6->m6_map[INDEX_##x]==INVALID)             \
 222                 return (_MAPPER_CONVERT_NONIDENTICAL);  \
 223         *dst = m6->m6_map[INDEX_##x];                   \
 224         return (0);                                     \
 225 } else
 226                 SPECIALS(FORWARD);
 227                 *dst = src;
 228         } else {
 229                 /* backward */
 230 #define BACKWARD(x)                                                     \
 231 if (m6->m6_map[INDEX_##x] != INVALID && src == m6->m6_map[INDEX_##x]) { \
 232         *dst = (x);                                                     \
 233         return (0);                                                     \
 234 } else if (src == (x))                                                  \
 235         return (_MAPPER_CONVERT_ILSEQ);                                 \
 236 else
 237                 SPECIALS(BACKWARD);
 238                 if (src >= 0x80)
 239                         return (_MAPPER_CONVERT_NONIDENTICAL);
 240                 *dst = src;
 241         }
 242
 243         return (_MAPPER_CONVERT_SUCCESS);
 244 }
 245
 246 static void
 247 /*ARGSUSED*/
 248 _citrus_mapper_646_mapper_init_state(void)
 249 {
 250
 251 }