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 #define _GNU_SOURCE
29 #include <sys/cdefs.h>
30
31 #include "namespace.h"
32 #include "rune.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
43 extern char *_PathLocale;
44 int __collate_load_error = 1;
45 int __collate_substitute_nontrivial;
46 char __collate_version[STR_LEN];
47 u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN];
48 struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1];
49 struct __collate_st_chain_pri __collate_chain_pri_table[TABLE_SIZE];
50
51 #define FREAD(a, b, c, d) \
52 do { \
53 if (fread(a, b, c, d) != c) { \
54 fclose(d); \
55 return -1; \
56 } \
57 } while(0)
58
59 void __collate_err(int ex, const char *f);
60
61 int
__collate_load_tables(char * encoding)62 __collate_load_tables(char *encoding)
63 {
64 char buf[PATH_MAX];
65 FILE *fp;
66 int i, save_load_error;
67
68 save_load_error = __collate_load_error;
69 __collate_load_error = 1;
70 if (!encoding) {
71 __collate_load_error = save_load_error;
72 return -1;
73 }
74 if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX"))
75 return 0;
76 if (!_PathLocale) {
77 __collate_load_error = save_load_error;
78 return -1;
79 }
80 /* Range checking not needed, encoding has fixed size */
81 (void) strcpy(buf, _PathLocale);
82 (void) strcat(buf, "/");
83 (void) strcat(buf, encoding);
84 (void) strcat(buf, "/LC_COLLATE");
85 if ((fp = fopen(buf, "r")) == NULL) {
86 __collate_load_error = save_load_error;
87 return -1;
88 }
89 FREAD(__collate_version, sizeof(__collate_version), 1, fp);
90 if (strcmp(__collate_version, COLLATE_VERSION) != 0) {
91 fclose(fp);
92 return -1;
93 }
94 FREAD(__collate_substitute_table, sizeof(__collate_substitute_table),
95 1, fp);
96 FREAD(__collate_char_pri_table, sizeof(__collate_char_pri_table), 1,
97 fp);
98 FREAD(__collate_chain_pri_table, sizeof(__collate_chain_pri_table), 1,
99 fp);
100 fclose(fp);
101 __collate_load_error = 0;
102
103 __collate_substitute_nontrivial = 0;
104 for (i = 0; i < UCHAR_MAX + 1; i++) {
105 if (__collate_substitute_table[i][0] != i ||
106 __collate_substitute_table[i][1] != 0) {
107 __collate_substitute_nontrivial = 1;
108 break;
109 }
110 }
111
112 return 0;
113 }
114
115 u_char *
__collate_substitute(const u_char * s)116 __collate_substitute(const u_char *s)
117 {
118 int dest_len, len, nlen;
119 int delta = strlen((const char *) s);
120 u_char *dest_str = NULL;
121
122 if(s == NULL || *s == '\0')
123 return __collate_strdup((u_char *) "");
124 delta += delta / 8;
125 dest_str = (u_char *) malloc(dest_len = delta);
126 if(dest_str == NULL)
127 __collate_err(EX_OSERR, __FUNCTION__);
128 len = 0;
129 while(*s) {
130 nlen = len + strlen((const char *)
131 __collate_substitute_table[*s]);
132 if (dest_len <= nlen) {
133 dest_str = reallocf(dest_str, dest_len = nlen + delta);
134 if(dest_str == NULL)
135 __collate_err(EX_OSERR, __FUNCTION__);
136 }
137 strcpy((char *) dest_str + len,
138 (const char *) __collate_substitute_table[*s++]);
139 len = nlen;
140 }
141 return dest_str;
142 }
143
144 void
__collate_lookup(const u_char * t,int * len,int * prim,int * sec)145 __collate_lookup(const u_char *t,
146 int *len,
147 int *prim,
148 int *sec)
149 {
150 struct __collate_st_chain_pri *p2;
151
152 *len = 1;
153 *prim = *sec = 0;
154 for(p2 = __collate_chain_pri_table; p2->str[0]; p2++) {
155 if(strncmp((const char *) t, (const char *) p2->str,
156 strlen((const char *) p2->str)) == 0) {
157 *len = strlen((const char *) p2->str);
158 *prim = p2->prim;
159 *sec = p2->sec;
160 return;
161 }
162 }
163 *prim = __collate_char_pri_table[*t].prim;
164 *sec = __collate_char_pri_table[*t].sec;
165 }
166
167 u_char *
__collate_strdup(u_char * s)168 __collate_strdup(u_char *s)
169 {
170 u_char *t = (u_char *) strdup((const char *) s);
171
172 if (t == NULL)
173 __collate_err(EX_OSERR, __FUNCTION__);
174 return t;
175 }
176
177 void
__collate_err(int ex,const char * f)178 __collate_err(int ex, const char *f)
179 {
180 const char *s;
181 int serrno = errno;
182
183 /* Be careful to change write counts if you change the strings */
184 write(STDERR_FILENO, "collate_error: ", 15);
185 write(STDERR_FILENO, f, strlen(f));
186 write(STDERR_FILENO, ": ", 2);
187 s = strerror(serrno);
188 write(STDERR_FILENO, s, strlen(s));
189 write(STDERR_FILENO, "\n", 1);
190 exit(ex);
191 }
192
193 #ifdef COLLATE_DEBUG
194 void
__collate_print_tables()195 __collate_print_tables()
196 {
197 int i;
198 struct __collate_st_chain_pri *p2;
199
200 printf("Substitute table:\n");
201 for (i = 0; i < UCHAR_MAX + 1; i++)
202 if (i != *__collate_substitute_table[i])
203 printf("\t'%c' --> \"%s\"\n", i,
204 __collate_substitute_table[i]);
205 printf("Chain priority table:\n");
206 for (p2 = __collate_chain_pri_table; p2->str[0]; p2++)
207 printf("\t\"%s\" : %d %d\n\n", p2->str, p2->prim, p2->sec);
208 printf("Char priority table:\n");
209 for (i = 0; i < UCHAR_MAX + 1; i++)
210 printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim,
211 __collate_char_pri_table[i].sec);
212 }
213 #endif
214
