lib/libc/citrus/modules/citrus_mapper_646.c

   1 /*      $NetBSD: citrus_mapper_646.c,v 1.3 2003/07/12 15:39:20 tshiozak Exp $   */
   2
   3 /*-
   4  * Copyright (c)2003 Citrus Project,
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 #if defined(LIBC_SCCS) && !defined(lint)
  31 __RCSID("$NetBSD: citrus_mapper_646.c,v 1.3 2003/07/12 15:39:20 tshiozak Exp $");
  32 #endif /* LIBC_SCCS and not lint */
  33
  34 #include <assert.h>
  35 #include <errno.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <limits.h>
  40 #include <sys/queue.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         int             m6_forward;
  84         _index_t        m6_map[NUM_OF_SPECIALS];
  85 };
  86
  87 int
  88 _citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops,
  89                                  size_t lenops, uint32_t expected_version)
  90 {
  91         if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops))
  92                 return EINVAL;
  93
  94         memcpy(ops, &_citrus_mapper_646_mapper_ops,
  95                sizeof(_citrus_mapper_646_mapper_ops));
  96
  97         return 0;
  98 }
  99
 100 #define T_COMM '#'
 101 static int
 102 parse_file(struct _citrus_mapper_646 *m6, const char *path)
 103 {
 104         int ret, i;
 105         struct _region r;
 106         struct _memstream ms;
 107         const char *p;
 108         size_t len;
 109         char buf[PATH_MAX];
 110
 111         ret = _map_file(&r, path);
 112         if (ret)
 113                 return ret;
 114         _memstream_bind(&ms, &r);
 115         for (i=0; i<NUM_OF_SPECIALS; i++) {
 116 retry:
 117                 p = _memstream_getln(&ms, &len);
 118                 if (p==NULL) {
 119                         ret = EINVAL;
 120                         break;
 121                 }
 122                 p = _bcs_skip_ws_len(p, &len);
 123                 if (*p == T_COMM || len==0)
 124                         goto retry;
 125                 if (!_bcs_isdigit(*p)) {
 126                         ret = EINVAL;
 127                         break;
 128                 }
 129                 snprintf(buf, sizeof(buf), "%.*s", (int)len, p);
 130                 m6->m6_map[i] = strtoul(buf, (char **)&p, 0);
 131                 p = _bcs_skip_ws(buf);
 132                 if (*p != T_COMM && !*p) {
 133                         ret = EINVAL;
 134                         break;
 135                 }
 136         }
 137         _unmap_file(&r);
 138
 139         return ret;
 140 };
 141
 142 static int
 143 parse_var(struct _citrus_mapper_646 *m6, struct _memstream *ms,
 144           const char *dir)
 145 {
 146         struct _region r;
 147         char path[PATH_MAX];
 148
 149         m6->m6_forward = 1;
 150         _memstream_skip_ws(ms);
 151         /* whether backward */
 152         if (_memstream_peek(ms) == '!') {
 153                 _memstream_getc(ms);
 154                 m6->m6_forward = 0;
 155         }
 156         /* get description file path */
 157         _memstream_getregion(ms, &r, _memstream_remainder(ms));
 158         snprintf(path, sizeof(path), "%s/%.*s",
 159                  dir, (int)_region_size(&r), (char *)_region_head(&r));
 160         /* remove trailing white spaces */
 161         path[_bcs_skip_nonws(path)-path] = '\0';
 162         return parse_file(m6, path);
 163 }
 164
 165 static int
 166 /*ARGSUSED*/
 167 _citrus_mapper_646_mapper_init(struct _citrus_mapper_area *__restrict ma,
 168                                struct _citrus_mapper * __restrict cm,
 169                                const char * __restrict dir,
 170                                const void * __restrict var, size_t lenvar,
 171                                struct _citrus_mapper_traits * __restrict mt,
 172                                size_t lenmt)
 173 {
 174         struct _citrus_mapper_646 *m6;
 175         struct _memstream ms;
 176         struct _region r;
 177         int ret;
 178
 179         _DIAGASSERT(cm && dir && mt);
 180
 181         if (lenmt<sizeof(*mt))
 182                 return EINVAL;
 183
 184         m6 = malloc(sizeof(*m6));
 185         if (m6 == NULL)
 186                 return errno;
 187
 188         _region_init(&r, (void *)var, lenvar);
 189         _memstream_bind(&ms, &r);
 190         ret = parse_var(m6, &ms, dir);
 191         if (ret) {
 192                 free(m6);
 193                 return ret;
 194         }
 195
 196         cm->cm_closure = m6;
 197         mt->mt_src_max = mt->mt_dst_max = 1;    /* 1:1 converter */
 198         mt->mt_state_size = 0;                  /* stateless */
 199
 200         return 0;
 201 }
 202
 203 static void
 204 /*ARGSUSED*/
 205 _citrus_mapper_646_mapper_uninit(struct _citrus_mapper *cm)
 206 {
 207         if (cm && cm->cm_closure) {
 208                 free(cm->cm_closure);
 209         }
 210 }
 211
 212 static int
 213 /*ARGSUSED*/
 214 _citrus_mapper_646_mapper_convert(struct _citrus_mapper * __restrict cm,
 215                                   _index_t * __restrict dst, _index_t src,
 216                                   void * __restrict ps)
 217 {
 218         struct _citrus_mapper_646 *m6;
 219
 220         _DIAGASSERT(cm && cm->cm_closure);
 221
 222         m6 = cm->cm_closure;
 223         if (m6->m6_forward) {
 224                 /* forward */
 225                 if (src>=0x80)
 226                         return _MAPPER_CONVERT_ILSEQ;
 227 #define FORWARD(x)                                      \
 228 if (src==(x)) {                                         \
 229         if (m6->m6_map[INDEX_##x]==INVALID)             \
 230                 return _MAPPER_CONVERT_NONIDENTICAL;    \
 231         *dst = m6->m6_map[INDEX_##x];                   \
 232         return 0;                                       \
 233 } else
 234                 SPECIALS(FORWARD);
 235                 *dst = src;
 236         } else {
 237                 /* backward */
 238 #define BACKWARD(x)                                                     \
 239 if (m6->m6_map[INDEX_##x]!=INVALID && src==m6->m6_map[INDEX_##x]) {     \
 240         *dst = (x);                                                     \
 241         return 0;                                                       \
 242 } else if (src==(x))                                                    \
 243         return _MAPPER_CONVERT_ILSEQ;                                   \
 244 else
 245                 SPECIALS(BACKWARD);
 246                 if (src>=0x80)
 247                         return _MAPPER_CONVERT_NONIDENTICAL;
 248                 *dst = src;
 249         }
 250
 251         return _MAPPER_CONVERT_SUCCESS;
 252 }
 253
 254 static void
 255 /*ARGSUSED*/
 256 _citrus_mapper_646_mapper_init_state(struct _citrus_mapper * __restrict cm,
 257                                      void * __restrict ps)
 258 {
 259 }