locale/FreeBSD/collate.c

   1 /*-
   2  * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
   3  *              at Electronni Visti IA, Kiev, Ukraine.
   4  *                      All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD: src/lib/libc/locale/collate.c,v 1.33 2004/09/22 16:56:48 stefanf Exp $");
  30
  31 #include "namespace.h"
  32 #include <arpa/inet.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <unistd.h>
  38 #include <sysexits.h>
  39 #include "un-namespace.h"
  40
  41 #include "collate.h"
  42 #include "setlocale.h"
  43 #include "ldpart.h"
  44
  45 #include "libc_private.h"
  46
  47 int __collate_load_error = 1;
  48 int __collate_substitute_nontrivial;
  49
  50 u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN];
  51 struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1];
  52 struct __collate_st_chain_pri *__collate_chain_pri_table;
  53
  54 void __collate_err(int ex, const char *f) __dead2;
  55
  56 int
  57 __collate_load_tables(const char *encoding)
  58 {
  59         FILE *fp;
  60         int i, saverr, chains;
  61         uint32_t u32;
  62         char strbuf[STR_LEN], buf[PATH_MAX];
  63         void *TMP_substitute_table, *TMP_char_pri_table, *TMP_chain_pri_table;
  64         static char collate_encoding[ENCODING_LEN + 1];
  65
  66         /* 'encoding' must be already checked. */
  67         if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
  68                 __collate_load_error = 1;
  69                 return (_LDP_CACHE);
  70         }
  71
  72         /*
  73          * If the locale name is the same as our cache, use the cache.
  74          */
  75         if (strcmp(encoding, collate_encoding) == 0) {
  76                 __collate_load_error = 0;
  77                 return (_LDP_CACHE);
  78         }
  79
  80         /*
  81          * Slurp the locale file into the cache.
  82          */
  83
  84         /* 'PathLocale' must be already set & checked. */
  85         /* Range checking not needed, encoding has fixed size */
  86         (void)strcpy(buf, _PathLocale);
  87         (void)strcat(buf, "/");
  88         (void)strcat(buf, encoding);
  89         (void)strcat(buf, "/LC_COLLATE");
  90         if ((fp = fopen(buf, "r")) == NULL)
  91                 return (_LDP_ERROR);
  92
  93         if (fread(strbuf, sizeof(strbuf), 1, fp) != 1) {
  94                 saverr = errno;
  95                 (void)fclose(fp);
  96                 errno = saverr;
  97                 return (_LDP_ERROR);
  98         }
  99         chains = -1;
 100         if (strcmp(strbuf, COLLATE_VERSION) == 0)
 101                 chains = 0;
 102         else if (strcmp(strbuf, COLLATE_VERSION1_1) == 0)
 103                 chains = 1;
 104         if (chains < 0) {
 105                 (void)fclose(fp);
 106                 errno = EFTYPE;
 107                 return (_LDP_ERROR);
 108         }
 109         if (chains) {
 110                 if (fread(&u32, sizeof(u32), 1, fp) != 1) {
 111                         saverr = errno;
 112                         (void)fclose(fp);
 113                         errno = saverr;
 114                         return (_LDP_ERROR);
 115                 }
 116                 if ((chains = (int)ntohl(u32)) < 1) {
 117                         (void)fclose(fp);
 118                         errno = EFTYPE;
 119                         return (_LDP_ERROR);
 120                 }
 121         } else
 122                 chains = TABLE_SIZE;
 123
 124         if ((TMP_substitute_table =
 125              malloc(sizeof(__collate_substitute_table))) == NULL) {
 126                 saverr = errno;
 127                 (void)fclose(fp);
 128                 errno = saverr;
 129                 return (_LDP_ERROR);
 130         }
 131         if ((TMP_char_pri_table =
 132              malloc(sizeof(__collate_char_pri_table))) == NULL) {
 133                 saverr = errno;
 134                 free(TMP_substitute_table);
 135                 (void)fclose(fp);
 136                 errno = saverr;
 137                 return (_LDP_ERROR);
 138         }
 139         if ((TMP_chain_pri_table =
 140              malloc(sizeof(*__collate_chain_pri_table) * chains)) == NULL) {
 141                 saverr = errno;
 142                 free(TMP_substitute_table);
 143                 free(TMP_char_pri_table);
 144                 (void)fclose(fp);
 145                 errno = saverr;
 146                 return (_LDP_ERROR);
 147         }
 148
 149 #define FREAD(a, b, c, d) \
 150 { \
 151         if (fread(a, b, c, d) != c) { \
 152                 saverr = errno; \
 153                 free(TMP_substitute_table); \
 154                 free(TMP_char_pri_table); \
 155                 free(TMP_chain_pri_table); \
 156                 (void)fclose(d); \
 157                 errno = saverr; \
 158                 return (_LDP_ERROR); \
 159         } \
 160 }
 161
 162         FREAD(TMP_substitute_table, sizeof(__collate_substitute_table), 1, fp);
 163         FREAD(TMP_char_pri_table, sizeof(__collate_char_pri_table), 1, fp);
 164         FREAD(TMP_chain_pri_table,
 165               sizeof(*__collate_chain_pri_table), chains, fp);
 166         (void)fclose(fp);
 167
 168         (void)strcpy(collate_encoding, encoding);
 169         if (__collate_substitute_table_ptr != NULL)
 170                 free(__collate_substitute_table_ptr);
 171         __collate_substitute_table_ptr = TMP_substitute_table;
 172         if (__collate_char_pri_table_ptr != NULL)
 173                 free(__collate_char_pri_table_ptr);
 174         __collate_char_pri_table_ptr = TMP_char_pri_table;
 175         if (__collate_chain_pri_table != NULL)
 176                 free(__collate_chain_pri_table);
 177         __collate_chain_pri_table = TMP_chain_pri_table;
 178
 179         __collate_substitute_nontrivial = 0;
 180         for (i = 0; i < UCHAR_MAX + 1; i++) {
 181                 if (__collate_substitute_table[i][0] != i ||
 182                     __collate_substitute_table[i][1] != 0) {
 183                         __collate_substitute_nontrivial = 1;
 184                         break;
 185                 }
 186         }
 187         __collate_load_error = 0;
 188
 189         return (_LDP_LOADED);
 190 }
 191
 192 u_char *
 193 __collate_substitute(s)
 194         const u_char *s;
 195 {
 196         int dest_len, len, nlen;
 197         int delta = strlen(s);
 198         u_char *dest_str = NULL;
 199
 200         if (s == NULL || *s == '\0')
 201                 return (__collate_strdup(""));
 202         delta += delta / 8;
 203         dest_str = malloc(dest_len = delta);
 204         if (dest_str == NULL)
 205                 __collate_err(EX_OSERR, __func__);
 206         len = 0;
 207         while (*s) {
 208                 nlen = len + strlen(__collate_substitute_table[*s]);
 209                 if (dest_len <= nlen) {
 210                         dest_str = reallocf(dest_str, dest_len = nlen + delta);
 211                         if (dest_str == NULL)
 212                                 __collate_err(EX_OSERR, __func__);
 213                 }
 214                 (void)strcpy(dest_str + len, __collate_substitute_table[*s++]);
 215                 len = nlen;
 216         }
 217         return (dest_str);
 218 }
 219
 220 void
 221 __collate_lookup(t, len, prim, sec)
 222         const u_char *t;
 223         int *len, *prim, *sec;
 224 {
 225         struct __collate_st_chain_pri *p2;
 226
 227         *len = 1;
 228         *prim = *sec = 0;
 229         for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++) {
 230                 if (*t == p2->str[0] &&
 231                     strncmp(t, p2->str, strlen(p2->str)) == 0) {
 232                         *len = strlen(p2->str);
 233                         *prim = p2->prim;
 234                         *sec = p2->sec;
 235                         return;
 236                 }
 237         }
 238         *prim = __collate_char_pri_table[*t].prim;
 239         *sec = __collate_char_pri_table[*t].sec;
 240 }
 241
 242 u_char *
 243 __collate_strdup(s)
 244         u_char *s;
 245 {
 246         u_char *t = strdup(s);
 247
 248         if (t == NULL)
 249                 __collate_err(EX_OSERR, __func__);
 250         return (t);
 251 }
 252
 253 void
 254 __collate_err(int ex, const char *f)
 255 {
 256         const char *s;
 257         int serrno = errno;
 258
 259         s = _getprogname();
 260         _write(STDERR_FILENO, s, strlen(s));
 261         _write(STDERR_FILENO, ": ", 2);
 262         s = f;
 263         _write(STDERR_FILENO, s, strlen(s));
 264         _write(STDERR_FILENO, ": ", 2);
 265         s = strerror(serrno);
 266         _write(STDERR_FILENO, s, strlen(s));
 267         _write(STDERR_FILENO, "\n", 1);
 268         exit(ex);
 269 }
 270
 271 #ifdef COLLATE_DEBUG
 272 void
 273 __collate_print_tables()
 274 {
 275         int i;
 276         struct __collate_st_chain_pri *p2;
 277
 278         printf("Substitute table:\n");
 279         for (i = 0; i < UCHAR_MAX + 1; i++)
 280             if (i != *__collate_substitute_table[i])
 281                 printf("\t'%c' --> \"%s\"\n", i,
 282                        __collate_substitute_table[i]);
 283         printf("Chain priority table:\n");
 284         for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++)
 285                 printf("\t\"%s\" : %d %d\n", p2->str, p2->prim, p2->sec);
 286         printf("Char priority table:\n");
 287         for (i = 0; i < UCHAR_MAX + 1; i++)
 288                 printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim,
 289                        __collate_char_pri_table[i].sec);
 290 }
 291 #endif