lib/libiconv_modules/mapper_serial/citrus_mapper_serial.c

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