lib/i18n_module/mapper_646/citrus_mapper_646.c

   1 /* $FreeBSD: head/lib/libiconv_modules/mapper_646/citrus_mapper_646.c 219019 2011-02-25 00:04:39Z gabor $ */
   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
  76 enum {
  77         SPECIALS(INDEX)
  78         NUM_OF_SPECIALS
  79 };
  80 struct _citrus_mapper_646 {
  81         _index_t         m6_map[NUM_OF_SPECIALS];
  82         int              m6_forward;
  83 };
  84
  85 int
  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 '#'
  96 static int
  97 parse_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++) {
 112 retry:
 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
 139 static int
 140 parse_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
 162 static 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
 196 static 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
 205 static 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)                                      \
 218 if (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)                                                     \
 229 if (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);                                 \
 234 else
 235                 SPECIALS(BACKWARD);
 236                 if (src >= 0x80)
 237                         return (_MAPPER_CONVERT_NONIDENTICAL);
 238                 *dst = src;
 239         }
 240
 241         return (_MAPPER_CONVERT_SUCCESS);
 242 }
 243
 244 static void
 245 /*ARGSUSED*/
 246 _citrus_mapper_646_mapper_init_state(void)
 247 {
 248
 249 }