lib/libc/locale/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  * $FreeBSD: src/lib/libc/locale/collate.c,v 1.21.2.4 2002/10/11 10:36:47 ache Exp $
  28  * $DragonFly: src/lib/libc/locale/collate.c,v 1.7 2005/11/13 01:20:49 swildner Exp $
  29  */
  30
  31 #include "namespace.h"
  32 #include <arpa/inet.h>
  33 #include <rune.h>
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <errno.h>
  38 #include <unistd.h>
  39 #include <sysexits.h>
  40 #include "un-namespace.h"
  41
  42 #include "collate.h"
  43
  44 #define ENCODING_LEN    31
  45 #define _LDP_LOADED 0
  46 #define _LDP_ERROR  (-1)
  47 #define _LDP_CACHE  1
  48
  49 int __collate_load_error = 1;
  50 int __collate_substitute_nontrivial;
  51
  52 u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN];
  53 struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1];
  54 struct __collate_st_chain_pri *__collate_chain_pri_table;
  55
  56 void __collate_err(int ex, const char *f) __dead2;
  57
  58 int
  59 __collate_load_tables(const char *encoding)
  60 {
  61         FILE *fp;
  62         int i, saverr, chains;
  63         uint32_t u32;
  64         char strbuf[STR_LEN], buf[PATH_MAX];
  65         void *TMP_substitute_table, *TMP_char_pri_table, *TMP_chain_pri_table;
  66         static char collate_encoding[ENCODING_LEN + 1];
  67
  68         /* 'encoding' must be already checked. */
  69         if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
  70                 __collate_load_error = 1;
  71                 return (_LDP_CACHE);
  72         }
  73
  74         /*
  75          * If the locale name is the same as our cache, use the cache.
  76          */
  77         if (strcmp(encoding, collate_encoding) == 0) {
  78                 __collate_load_error = 0;
  79                 return (_LDP_CACHE);
  80         }
  81
  82         /*
  83          * Slurp the locale file into the cache.
  84          */
  85
  86         /* 'PathLocale' must be already set & checked. */
  87         /* Range checking not needed, encoding has fixed size */
  88         strcpy(buf, _PathLocale);
  89         strcat(buf, "/");
  90         strcat(buf, encoding);
  91         strcat(buf, "/LC_COLLATE");
  92         if ((fp = fopen(buf, "r")) == NULL)
  93                 return (_LDP_ERROR);
  94
  95         if (fread(strbuf, sizeof(strbuf), 1, fp) != 1) {
  96                 saverr = errno;
  97                 fclose(fp);
  98                 errno = saverr;
  99                 return (_LDP_ERROR);
 100         }
 101         chains = -1;
 102         if (strcmp(strbuf, COLLATE_VERSION) == 0)
 103                 chains = 0;
 104         else if (strcmp(strbuf, COLLATE_VERSION1_1) == 0)
 105                 chains = 1;
 106         if (chains < 0) {
 107                 fclose(fp);
 108                 errno = EFTYPE;
 109                 return (_LDP_ERROR);
 110         }
 111         if (chains) {
 112                 if (fread(&u32, sizeof(u32), 1, fp) != 1) {
 113                         saverr = errno;
 114                         fclose(fp);
 115                         errno = saverr;
 116                         return (_LDP_ERROR);
 117                 }
 118                 if ((chains = (int)ntohl(u32)) < 1) {
 119                         fclose(fp);
 120                         errno = EFTYPE;
 121                         return (_LDP_ERROR);
 122                 }
 123         } else
 124                 chains = TABLE_SIZE;
 125
 126         if ((TMP_substitute_table =
 127              malloc(sizeof(__collate_substitute_table))) == NULL) {
 128                 saverr = errno;
 129                 fclose(fp);
 130                 errno = saverr;
 131                 return (_LDP_ERROR);
 132         }
 133         if ((TMP_char_pri_table =
 134              malloc(sizeof(__collate_char_pri_table))) == NULL) {
 135                 saverr = errno;
 136                 free(TMP_substitute_table);
 137                 fclose(fp);
 138                 errno = saverr;
 139                 return (_LDP_ERROR);
 140         }
 141         if ((TMP_chain_pri_table =
 142              malloc(sizeof(*__collate_chain_pri_table) * chains)) == NULL) {
 143                 saverr = errno;
 144                 free(TMP_substitute_table);
 145                 free(TMP_char_pri_table);
 146                 fclose(fp);
 147                 errno = saverr;
 148                 return (_LDP_ERROR);
 149         }
 150
 151 #define FREAD(a, b, c, d) \
 152 { \
 153         if ( fread(a, b, c, d) != c) { \
 154                 saverr = errno; \
 155                 free(TMP_substitute_table); \
 156                 free(TMP_char_pri_table); \
 157                 free(TMP_chain_pri_table); \
 158                 fclose(d); \
 159                 errno = saverr; \
 160                 return (_LDP_ERROR); \
 161         } \
 162 }
 163
 164         FREAD(TMP_substitute_table, sizeof(__collate_substitute_table), 1, fp);
 165         FREAD(TMP_char_pri_table, sizeof(__collate_char_pri_table), 1, fp);
 166         FREAD(TMP_chain_pri_table,
 167               sizeof(*__collate_chain_pri_table), chains, fp);
 168         fclose(fp);
 169
 170         strcpy(collate_encoding, encoding);
 171         if (__collate_substitute_table_ptr != NULL)
 172                 free(__collate_substitute_table_ptr);
 173         __collate_substitute_table_ptr = TMP_substitute_table;
 174         if (__collate_char_pri_table_ptr != NULL)
 175                 free(__collate_char_pri_table_ptr);
 176         __collate_char_pri_table_ptr = TMP_char_pri_table;
 177         if (__collate_chain_pri_table != NULL)
 178                 free(__collate_chain_pri_table);
 179         __collate_chain_pri_table = TMP_chain_pri_table;
 180
 181         __collate_substitute_nontrivial = 0;
 182         for (i = 0; i < UCHAR_MAX + 1; i++) {
 183                 if (__collate_substitute_table[i][0] != i ||
 184                     __collate_substitute_table[i][1] != 0) {
 185                         __collate_substitute_nontrivial = 1;
 186                         break;
 187                 }
 188         }
 189         __collate_load_error = 0;
 190
 191         return (_LDP_LOADED);
 192 }
 193
 194 u_char *
 195 __collate_substitute(const u_char *s)
 196 {
 197         int dest_len, len, nlen;
 198         int delta = strlen(s);
 199         u_char *dest_str = NULL;
 200
 201         if (s == NULL || *s == '\0')
 202                 return (__collate_strdup(""));
 203         delta += delta / 8;
 204         dest_str = malloc(dest_len = delta);
 205         if (dest_str == NULL)
 206                 __collate_err(EX_OSERR, __func__);
 207         len = 0;
 208         while (*s) {
 209                 nlen = len + strlen(__collate_substitute_table[*s]);
 210                 if (dest_len <= nlen) {
 211                         dest_str = reallocf(dest_str, dest_len = nlen + delta);
 212                         if (dest_str == NULL)
 213                                 __collate_err(EX_OSERR, __func__);
 214                 }
 215                 strcpy(dest_str + len, __collate_substitute_table[*s++]);
 216                 len = nlen;
 217         }
 218         return (dest_str);
 219 }
 220
 221 void
 222 __collate_lookup(const u_char *t, int *len, int *prim, int *sec)
 223 {
 224         struct __collate_st_chain_pri *p2;
 225
 226         *len = 1;
 227         *prim = *sec = 0;
 228         for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++) {
 229                 if (*t == p2->str[0] &&
 230                     strncmp(t, p2->str, strlen(p2->str)) == 0) {
 231                         *len = strlen(p2->str);
 232                         *prim = p2->prim;
 233                         *sec = p2->sec;
 234                         return;
 235                 }
 236         }
 237         *prim = __collate_char_pri_table[*t].prim;
 238         *sec = __collate_char_pri_table[*t].sec;
 239 }
 240
 241 u_char *
 242 __collate_strdup(u_char *s)
 243 {
 244         u_char *t = strdup(s);
 245
 246         if (t == NULL)
 247                 __collate_err(EX_OSERR, __func__);
 248         return (t);
 249 }
 250
 251 void
 252 __collate_err(int ex, const char *f)
 253 {
 254         const char *progname;
 255         int serrno = errno;
 256
 257         progname = _getprogname();
 258         _write(STDERR_FILENO, progname, strlen(progname));
 259         _write(STDERR_FILENO, ": ", 2);
 260         _write(STDERR_FILENO, f, strlen(f));
 261         _write(STDERR_FILENO, ": ", 2);
 262         f = strerror(serrno);
 263         _write(STDERR_FILENO, f, strlen(f));
 264         _write(STDERR_FILENO, "\n", 1);
 265         exit(ex);
 266 }
 267
 268 #ifdef COLLATE_DEBUG
 269 void
 270 __collate_print_tables(void)
 271 {
 272         int i;
 273         struct __collate_st_chain_pri *p2;
 274
 275         printf("Substitute table:\n");
 276         for (i = 0; i < UCHAR_MAX + 1; i++)
 277             if (i != *__collate_substitute_table[i])
 278                 printf("\t'%c' --> \"%s\"\n", i,
 279                        __collate_substitute_table[i]);
 280         printf("Chain priority table:\n");
 281         for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++)
 282                 printf("\t\"%s\" : %d %d\n", p2->str, p2->prim, p2->sec);
 283         printf("Char priority table:\n");
 284         for (i = 0; i < UCHAR_MAX + 1; i++)
 285                 printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim,
 286                        __collate_char_pri_table[i].sec);
 287 }
 288 #endif