lib/libc/citrus/modules/citrus_mapper_646.c

   1 /* $NetBSD: src/lib/libc/citrus/modules/citrus_mapper_646.c,v 1.4 2003/07/14 11:37:49 tshiozak Exp $ */
   2 /* $DragonFly: src/lib/libc/citrus/modules/citrus_mapper_646.c,v 1.2 2008/04/10 10:21:01 hasso 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/types.h>
  31 #include <sys/queue.h>
  32 #include <assert.h>
  33 #include <errno.h>
  34 #include <limits.h>
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #include "citrus_namespace.h"
  40 #include "citrus_types.h"
  41 #include "citrus_bcs.h"
  42 #include "citrus_module.h"
  43 #include "citrus_region.h"
  44 #include "citrus_memstream.h"
  45 #include "citrus_mmap.h"
  46 #include "citrus_hash.h"
  47 #include "citrus_mapper.h"
  48 #include "citrus_mapper_646.h"
  49
  50 /* ---------------------------------------------------------------------- */
  51
  52 _CITRUS_MAPPER_DECLS(mapper_646);
  53 _CITRUS_MAPPER_DEF_OPS(mapper_646);
  54
  55 /* ---------------------------------------------------------------------- */
  56
  57 #define ILSEQ   0xFFFFFFFE
  58 #define INVALID 0xFFFFFFFF
  59 #define SPECIALS(x)                             \
  60         x(0x23)                                 \
  61         x(0x24)                                 \
  62         x(0x40)                                 \
  63         x(0x5B)                                 \
  64         x(0x5C)                                 \
  65         x(0x5D)                                 \
  66         x(0x5E)                                 \
  67         x(0x60)                                 \
  68         x(0x7B)                                 \
  69         x(0x7C)                                 \
  70         x(0x7D)                                 \
  71         x(0x7E)
  72
  73 #define INDEX(x) INDEX_##x,
  74
  75 enum {
  76         SPECIALS(INDEX)
  77         NUM_OF_SPECIALS
  78 };
  79 struct _citrus_mapper_646 {
  80         int             m6_forward;
  81         _index_t        m6_map[NUM_OF_SPECIALS];
  82 };
  83
  84 int
  85 _citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops,
  86                                  size_t lenops, uint32_t expected_version)
  87 {
  88         if (expected_version<_CITRUS_MAPPER_ABI_VERSION || lenops<sizeof(*ops))
  89                 return EINVAL;
  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         int ret, i;
 102         struct _region r;
 103         struct _memstream ms;
 104         const char *p;
 105         size_t len;
 106         char buf[PATH_MAX];
 107
 108         ret = _map_file(&r, path);
 109         if (ret)
 110                 return ret;
 111         _memstream_bind(&ms, &r);
 112         for (i=0; i<NUM_OF_SPECIALS; i++) {
 113 retry:
 114                 p = _memstream_getln(&ms, &len);
 115                 if (p==NULL) {
 116                         ret = EINVAL;
 117                         break;
 118                 }
 119                 p = _bcs_skip_ws_len(p, &len);
 120                 if (*p == T_COMM || len==0)
 121                         goto retry;
 122                 if (!_bcs_isdigit(*p)) {
 123                         ret = EINVAL;
 124                         break;
 125                 }
 126                 snprintf(buf, sizeof(buf), "%.*s", (int)len, p);
 127                 m6->m6_map[i] = strtoul(buf, (char **)&p, 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,
 165                                struct _citrus_mapper * __restrict cm,
 166                                const char * __restrict dir,
 167                                const void * __restrict var, size_t lenvar,
 168                                struct _citrus_mapper_traits * __restrict mt,
 169                                size_t lenmt)
 170 {
 171         struct _citrus_mapper_646 *m6;
 172         struct _memstream ms;
 173         struct _region r;
 174         int ret;
 175
 176         _DIAGASSERT(cm && dir && mt);
 177
 178         if (lenmt<sizeof(*mt))
 179                 return EINVAL;
 180
 181         m6 = malloc(sizeof(*m6));
 182         if (m6 == NULL)
 183                 return errno;
 184
 185         _region_init(&r, (void *)var, lenvar);
 186         _memstream_bind(&ms, &r);
 187         ret = parse_var(m6, &ms, dir);
 188         if (ret) {
 189                 free(m6);
 190                 return ret;
 191         }
 192
 193         cm->cm_closure = m6;
 194         mt->mt_src_max = mt->mt_dst_max = 1;    /* 1:1 converter */
 195         mt->mt_state_size = 0;                  /* stateless */
 196
 197         return 0;
 198 }
 199
 200 static void
 201 /*ARGSUSED*/
 202 _citrus_mapper_646_mapper_uninit(struct _citrus_mapper *cm)
 203 {
 204         if (cm && cm->cm_closure) {
 205                 free(cm->cm_closure);
 206         }
 207 }
 208
 209 static int
 210 /*ARGSUSED*/
 211 _citrus_mapper_646_mapper_convert(struct _citrus_mapper * __restrict cm,
 212                                   _index_t * __restrict dst, _index_t src,
 213                                   void * __restrict ps)
 214 {
 215         struct _citrus_mapper_646 *m6;
 216
 217         _DIAGASSERT(cm && cm->cm_closure);
 218
 219         m6 = cm->cm_closure;
 220         if (m6->m6_forward) {
 221                 /* forward */
 222                 if (src>=0x80)
 223                         return _MAPPER_CONVERT_ILSEQ;
 224 #define FORWARD(x)                                      \
 225 if (src==(x)) {                                         \
 226         if (m6->m6_map[INDEX_##x]==INVALID)             \
 227                 return _MAPPER_CONVERT_NONIDENTICAL;    \
 228         *dst = m6->m6_map[INDEX_##x];                   \
 229         return 0;                                       \
 230 } else
 231                 SPECIALS(FORWARD);
 232                 *dst = src;
 233         } else {
 234                 /* backward */
 235 #define BACKWARD(x)                                                     \
 236 if (m6->m6_map[INDEX_##x]!=INVALID && src==m6->m6_map[INDEX_##x]) {     \
 237         *dst = (x);                                                     \
 238         return 0;                                                       \
 239 } else if (src==(x))                                                    \
 240         return _MAPPER_CONVERT_ILSEQ;                                   \
 241 else
 242                 SPECIALS(BACKWARD);
 243                 if (src>=0x80)
 244                         return _MAPPER_CONVERT_NONIDENTICAL;
 245                 *dst = src;
 246         }
 247
 248         return _MAPPER_CONVERT_SUCCESS;
 249 }
 250
 251 static void
 252 /*ARGSUSED*/
 253 _citrus_mapper_646_mapper_init_state(struct _citrus_mapper * __restrict cm,
 254                                      void * __restrict ps)
 255 {
 256 }