lib/libc/locale/rune.c

   1 /*-
   2  * Copyright (c) 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Paul Borman at Krystal Technologies.
   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  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 static char sccsid[] = "@(#)rune.c      8.1 (Berkeley) 6/4/93";
  35 #endif /* LIBC_SCCS and not lint */
  36 #include <sys/cdefs.h>
  37 __FBSDID("$FreeBSD$");
  38
  39 #include "namespace.h"
  40 #include <arpa/inet.h>
  41 #include <errno.h>
  42 #include <runetype.h>
  43 #include <stdio.h>
  44 #include <string.h>
  45 #include <stdlib.h>
  46 #include <sys/types.h>
  47 #include <sys/stat.h>
  48 #include "un-namespace.h"
  49
  50 #include "runefile.h"
  51
  52 _RuneLocale *_Read_RuneMagi(FILE *);
  53
  54 _RuneLocale *
  55 _Read_RuneMagi(FILE *fp)
  56 {
  57         char *fdata, *data;
  58         void *lastp;
  59         _FileRuneLocale *frl;
  60         _RuneLocale *rl;
  61         _FileRuneEntry *frr;
  62         _RuneEntry *rr;
  63         struct stat sb;
  64         int x, saverr;
  65         void *variable;
  66         _FileRuneEntry *runetype_ext_ranges;
  67         _FileRuneEntry *maplower_ext_ranges;
  68         _FileRuneEntry *mapupper_ext_ranges;
  69         int runetype_ext_len = 0;
  70
  71         if (_fstat(fileno(fp), &sb) < 0)
  72                 return (NULL);
  73
  74         if ((size_t)sb.st_size < sizeof(_FileRuneLocale)) {
  75                 errno = EFTYPE;
  76                 return (NULL);
  77         }
  78
  79         if ((fdata = malloc(sb.st_size)) == NULL)
  80                 return (NULL);
  81
  82         errno = 0;
  83         rewind(fp); /* Someone might have read the magic number once already */
  84         if (errno) {
  85                 saverr = errno;
  86                 free(fdata);
  87                 errno = saverr;
  88                 return (NULL);
  89         }
  90
  91         if (fread(fdata, sb.st_size, 1, fp) != 1) {
  92                 saverr = errno;
  93                 free(fdata);
  94                 errno = saverr;
  95                 return (NULL);
  96         }
  97
  98         frl = (_FileRuneLocale *)fdata;
  99         lastp = fdata + sb.st_size;
 100
 101         variable = frl + 1;
 102
 103         if (memcmp(frl->magic, _FILE_RUNE_MAGIC_1, sizeof(frl->magic))) {
 104                 free(fdata);
 105                 errno = EFTYPE;
 106                 return (NULL);
 107         }
 108
 109         frl->variable_len = ntohl(frl->variable_len);
 110         frl->runetype_ext_nranges = ntohl(frl->runetype_ext_nranges);
 111         frl->maplower_ext_nranges = ntohl(frl->maplower_ext_nranges);
 112         frl->mapupper_ext_nranges = ntohl(frl->mapupper_ext_nranges);
 113
 114         for (x = 0; x < _CACHED_RUNES; ++x) {
 115                 frl->runetype[x] = ntohl(frl->runetype[x]);
 116                 frl->maplower[x] = ntohl(frl->maplower[x]);
 117                 frl->mapupper[x] = ntohl(frl->mapupper[x]);
 118         }
 119
 120         runetype_ext_ranges = (_FileRuneEntry *)variable;
 121         variable = runetype_ext_ranges + frl->runetype_ext_nranges;
 122         if (variable > lastp) {
 123                 free(fdata);
 124                 errno = EFTYPE;
 125                 return (NULL);
 126         }
 127
 128         maplower_ext_ranges = (_FileRuneEntry *)variable;
 129         variable = maplower_ext_ranges + frl->maplower_ext_nranges;
 130         if (variable > lastp) {
 131                 free(fdata);
 132                 errno = EFTYPE;
 133                 return (NULL);
 134         }
 135
 136         mapupper_ext_ranges = (_FileRuneEntry *)variable;
 137         variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
 138         if (variable > lastp) {
 139                 free(fdata);
 140                 errno = EFTYPE;
 141                 return (NULL);
 142         }
 143
 144         frr = runetype_ext_ranges;
 145         for (x = 0; x < frl->runetype_ext_nranges; ++x) {
 146                 uint32_t *types;
 147
 148                 frr[x].min = ntohl(frr[x].min);
 149                 frr[x].max = ntohl(frr[x].max);
 150                 frr[x].map = ntohl(frr[x].map);
 151                 if (frr[x].map == 0) {
 152                         int len = frr[x].max - frr[x].min + 1;
 153                         types = variable;
 154                         variable = types + len;
 155                         runetype_ext_len += len;
 156                         if (variable > lastp) {
 157                                 free(fdata);
 158                                 errno = EFTYPE;
 159                                 return (NULL);
 160                         }
 161                         while (len-- > 0)
 162                                 types[len] = ntohl(types[len]);
 163                 }
 164         }
 165
 166         frr = maplower_ext_ranges;
 167         for (x = 0; x < frl->maplower_ext_nranges; ++x) {
 168                 frr[x].min = ntohl(frr[x].min);
 169                 frr[x].max = ntohl(frr[x].max);
 170                 frr[x].map = ntohl(frr[x].map);
 171         }
 172
 173         frr = mapupper_ext_ranges;
 174         for (x = 0; x < frl->mapupper_ext_nranges; ++x) {
 175                 frr[x].min = ntohl(frr[x].min);
 176                 frr[x].max = ntohl(frr[x].max);
 177                 frr[x].map = ntohl(frr[x].map);
 178         }
 179         if ((char *)variable + frl->variable_len > (char *)lastp) {
 180                 free(fdata);
 181                 errno = EFTYPE;
 182                 return (NULL);
 183         }
 184
 185         /*
 186          * Convert from disk format to host format.
 187          */
 188         data = malloc(sizeof(_RuneLocale) +
 189             (frl->runetype_ext_nranges + frl->maplower_ext_nranges +
 190             frl->mapupper_ext_nranges) * sizeof(_RuneEntry) +
 191             runetype_ext_len * sizeof(*rr->__types) +
 192             frl->variable_len);
 193         if (data == NULL) {
 194                 saverr = errno;
 195                 free(fdata);
 196                 errno = saverr;
 197                 return (NULL);
 198         }
 199
 200         rl = (_RuneLocale *)data;
 201         rl->__variable = rl + 1;
 202
 203         memcpy(rl->__magic, _RUNE_MAGIC_1, sizeof(rl->__magic));
 204         memcpy(rl->__encoding, frl->encoding, sizeof(rl->__encoding));
 205         rl->__invalid_rune = 0;
 206
 207         rl->__variable_len = frl->variable_len;
 208         rl->__runetype_ext.__nranges = frl->runetype_ext_nranges;
 209         rl->__maplower_ext.__nranges = frl->maplower_ext_nranges;
 210         rl->__mapupper_ext.__nranges = frl->mapupper_ext_nranges;
 211
 212         for (x = 0; x < _CACHED_RUNES; ++x) {
 213                 rl->__runetype[x] = frl->runetype[x];
 214                 rl->__maplower[x] = frl->maplower[x];
 215                 rl->__mapupper[x] = frl->mapupper[x];
 216         }
 217
 218         rl->__runetype_ext.__ranges = (_RuneEntry *)rl->__variable;
 219         rl->__variable = rl->__runetype_ext.__ranges +
 220             rl->__runetype_ext.__nranges;
 221
 222         rl->__maplower_ext.__ranges = (_RuneEntry *)rl->__variable;
 223         rl->__variable = rl->__maplower_ext.__ranges +
 224             rl->__maplower_ext.__nranges;
 225
 226         rl->__mapupper_ext.__ranges = (_RuneEntry *)rl->__variable;
 227         rl->__variable = rl->__mapupper_ext.__ranges +
 228             rl->__mapupper_ext.__nranges;
 229
 230         variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
 231         frr = runetype_ext_ranges;
 232         rr = rl->__runetype_ext.__ranges;
 233         for (x = 0; x < rl->__runetype_ext.__nranges; ++x) {
 234                 uint32_t *types;
 235
 236                 rr[x].__min = frr[x].min;
 237                 rr[x].__max = frr[x].max;
 238                 rr[x].__map = frr[x].map;
 239                 if (rr[x].__map == 0) {
 240                         int len = rr[x].__max - rr[x].__min + 1;
 241                         types = variable;
 242                         variable = types + len;
 243                         rr[x].__types = rl->__variable;
 244                         rl->__variable = rr[x].__types + len;
 245                         while (len-- > 0)
 246                                 rr[x].__types[len] = types[len];
 247                 } else
 248                         rr[x].__types = NULL;
 249         }
 250
 251         frr = maplower_ext_ranges;
 252         rr = rl->__maplower_ext.__ranges;
 253         for (x = 0; x < rl->__maplower_ext.__nranges; ++x) {
 254                 rr[x].__min = frr[x].min;
 255                 rr[x].__max = frr[x].max;
 256                 rr[x].__map = frr[x].map;
 257         }
 258
 259         frr = mapupper_ext_ranges;
 260         rr = rl->__mapupper_ext.__ranges;
 261         for (x = 0; x < rl->__mapupper_ext.__nranges; ++x) {
 262                 rr[x].__min = frr[x].min;
 263                 rr[x].__max = frr[x].max;
 264                 rr[x].__map = frr[x].map;
 265         }
 266
 267         memcpy(rl->__variable, variable, rl->__variable_len);
 268         free(fdata);
 269
 270         /*
 271          * Go out and zero pointers that should be zero.
 272          */
 273         if (!rl->__variable_len)
 274                 rl->__variable = NULL;
 275
 276         if (!rl->__runetype_ext.__nranges)
 277                 rl->__runetype_ext.__ranges = NULL;
 278
 279         if (!rl->__maplower_ext.__nranges)
 280                 rl->__maplower_ext.__ranges = NULL;
 281
 282         if (!rl->__mapupper_ext.__nranges)
 283                 rl->__mapupper_ext.__ranges = NULL;
 284
 285         return (rl);
 286 }