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 * $Id: collate.c,v 1.7 1996/10/15 21:53:22 ache Exp $ 28 */ 29 30 #include <rune.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <string.h> 34 #include <errno.h> 35 #include <unistd.h> 36 #include <sysexits.h> 37 #include "collate.h" 38 39 char *_PathLocale; 40 int __collate_load_error = 1; 41 char __collate_version[STR_LEN]; 42 u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN]; 43 struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1]; 44 struct __collate_st_chain_pri __collate_chain_pri_table[TABLE_SIZE]; 45 46 #define FREAD(a, b, c, d) \ 47 do { \ 48 if(fread(a, b, c, d) != c) { \ 49 fclose(d); \ 50 return -1; \ 51 } \ 52 } while(0) 53 54 void __collate_err(int ex, const char *f) __dead2; 55 56 int 57 __collate_load_tables(encoding) 58 char *encoding; 59 { 60 char buf[PATH_MAX]; 61 FILE *fp; 62 int save_load_error; 63 64 save_load_error = __collate_load_error; 65 __collate_load_error = 1; 66 if (!encoding) { 67 __collate_load_error = save_load_error; 68 return -1; 69 } 70 if (!*encoding || !strcmp(encoding, "C") || !strcmp(encoding, "POSIX")) 71 return 0; 72 if (!_PathLocale && !(_PathLocale = getenv("PATH_LOCALE"))) 73 _PathLocale = _PATH_LOCALE; 74 strcpy(buf, _PathLocale); 75 strcat(buf, "/"); 76 strcat(buf, encoding); 77 strcat(buf, "/LC_COLLATE"); 78 if ((fp = fopen(buf, "r")) == NULL) { 79 __collate_load_error = save_load_error; 80 return -1; 81 } 82 FREAD(__collate_version, sizeof(__collate_version), 1, fp); 83 if (strcmp(__collate_version, COLLATE_VERSION) != 0) { 84 fclose(fp); 85 return -1; 86 } 87 FREAD(__collate_substitute_table, sizeof(__collate_substitute_table), 88 1, fp); 89 FREAD(__collate_char_pri_table, sizeof(__collate_char_pri_table), 1, 90 fp); 91 FREAD(__collate_chain_pri_table, sizeof(__collate_chain_pri_table), 1, 92 fp); 93 fclose(fp); 94 __collate_load_error = 0; 95 return 0; 96 } 97 98 u_char * 99 __collate_substitute(s) 100 const u_char *s; 101 { 102 int dest_len = 0, len = 0; 103 int delta = strlen(s); 104 u_char *dest_str = NULL; 105 106 if(s == NULL || *s == '\0') 107 return __collate_strdup(""); 108 while(*s) { 109 len += strlen(__collate_substitute_table[*s]); 110 while(dest_len <= len) { 111 if(!dest_str) 112 dest_str = calloc(dest_len = delta, 1); 113 else 114 dest_str = realloc(dest_str, dest_len += delta); 115 if(dest_str == NULL) 116 __collate_err(EX_OSERR, __FUNCTION__); 117 } 118 strcat(dest_str, __collate_substitute_table[*s++]); 119 } 120 return dest_str; 121 } 122 123 void 124 __collate_lookup(t, len, prim, sec) 125 u_char *t; 126 int *len, *prim, *sec; 127 { 128 struct __collate_st_chain_pri *p2; 129 130 *len = 1; 131 *prim = *sec = 0; 132 for(p2 = __collate_chain_pri_table; p2->str[0]; p2++) { 133 if(strncmp(t, p2->str, strlen(p2->str)) == 0) { 134 *len = strlen(p2->str); 135 *prim = p2->prim; 136 *sec = p2->sec; 137 return; 138 } 139 } 140 *prim = __collate_char_pri_table[*t].prim; 141 *sec = __collate_char_pri_table[*t].sec; 142 } 143 144 u_char * 145 __collate_strdup(s) 146 u_char *s; 147 { 148 u_char *t = strdup(s); 149 150 if (t == NULL) 151 __collate_err(EX_OSERR, __FUNCTION__); 152 return t; 153 } 154 155 void 156 __collate_err(int ex, const char *f) 157 { 158 extern char *__progname; /* Program name, from crt0. */ 159 const char *s; 160 int serrno = errno; 161 162 s = __progname; 163 write(STDERR_FILENO, s, strlen(s)); 164 write(STDERR_FILENO, ": ", 2); 165 s = f; 166 write(STDERR_FILENO, s, strlen(s)); 167 write(STDERR_FILENO, ": ", 2); 168 s = strerror(serrno); 169 write(STDERR_FILENO, s, strlen(s)); 170 write(STDERR_FILENO, "\n", 1); 171 exit(ex); 172 } 173 174 #ifdef COLLATE_DEBUG 175 void 176 __collate_print_tables() 177 { 178 int i; 179 struct __collate_st_chain_pri *p2; 180 181 printf("Substitute table:\n"); 182 for (i = 0; i < UCHAR_MAX + 1; i++) 183 if (i != *__collate_substitute_table[i]) 184 printf("\t'%c' --> \"%s\"\n", i, 185 __collate_substitute_table[i]); 186 printf("Chain priority table:\n"); 187 for (p2 = __collate_chain_pri_table; p2->str[0]; p2++) 188 printf("\t\"%s\" : %d %d\n\n", p2->str, p2->prim, p2->sec); 189 printf("Char priority table:\n"); 190 for (i = 0; i < UCHAR_MAX + 1; i++) 191 printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim, 192 __collate_char_pri_table[i].sec); 193 } 194 #endif 195