freebsd-dev/lib/libc/locale/collate.c
1997-02-22 15:12:41 +00:00

198 lines
5.2 KiB
C

/*-
* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
* at Electronni Visti IA, Kiev, Ukraine.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
*/
#include <rune.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sysexits.h>
#include "collate.h"
#include "setlocale.h"
int __collate_load_error = 1;
char __collate_version[STR_LEN];
u_char __collate_substitute_table[UCHAR_MAX + 1][STR_LEN];
struct __collate_st_char_pri __collate_char_pri_table[UCHAR_MAX + 1];
struct __collate_st_chain_pri __collate_chain_pri_table[TABLE_SIZE];
#define FREAD(a, b, c, d) \
do { \
if(fread(a, b, c, d) != c) { \
fclose(d); \
return -1; \
} \
} while(0)
void __collate_err(int ex, const char *f) __dead2;
int
__collate_load_tables(encoding)
char *encoding;
{
char buf[PATH_MAX];
FILE *fp;
int save_load_error;
save_load_error = __collate_load_error;
__collate_load_error = 1;
if (!encoding) {
__collate_load_error = save_load_error;
return -1;
}
if (!strcmp(encoding, "C") || !strcmp(encoding, "POSIX"))
return 0;
if (!_PathLocale) {
__collate_load_error = save_load_error;
return -1;
}
/* Range checking not needed, encoding has fixed size */
(void) strcpy(buf, _PathLocale);
(void) strcat(buf, "/");
(void) strcat(buf, encoding);
(void) strcat(buf, "/LC_COLLATE");
if ((fp = fopen(buf, "r")) == NULL) {
__collate_load_error = save_load_error;
return -1;
}
FREAD(__collate_version, sizeof(__collate_version), 1, fp);
if (strcmp(__collate_version, COLLATE_VERSION) != 0) {
fclose(fp);
return -1;
}
FREAD(__collate_substitute_table, sizeof(__collate_substitute_table),
1, fp);
FREAD(__collate_char_pri_table, sizeof(__collate_char_pri_table), 1,
fp);
FREAD(__collate_chain_pri_table, sizeof(__collate_chain_pri_table), 1,
fp);
fclose(fp);
__collate_load_error = 0;
return 0;
}
u_char *
__collate_substitute(s)
const u_char *s;
{
int dest_len = 0, len = 0;
int delta = strlen(s);
u_char *dest_str = NULL;
if(s == NULL || *s == '\0')
return __collate_strdup("");
while(*s) {
len += strlen(__collate_substitute_table[*s]);
while(dest_len <= len) {
if(!dest_str)
dest_str = calloc(dest_len = delta, 1);
else
dest_str = realloc(dest_str, dest_len += delta);
if(dest_str == NULL)
__collate_err(EX_OSERR, __FUNCTION__);
}
strcat(dest_str, __collate_substitute_table[*s++]);
}
return dest_str;
}
void
__collate_lookup(t, len, prim, sec)
u_char *t;
int *len, *prim, *sec;
{
struct __collate_st_chain_pri *p2;
*len = 1;
*prim = *sec = 0;
for(p2 = __collate_chain_pri_table; p2->str[0]; p2++) {
if(strncmp(t, p2->str, strlen(p2->str)) == 0) {
*len = strlen(p2->str);
*prim = p2->prim;
*sec = p2->sec;
return;
}
}
*prim = __collate_char_pri_table[*t].prim;
*sec = __collate_char_pri_table[*t].sec;
}
u_char *
__collate_strdup(s)
u_char *s;
{
u_char *t = strdup(s);
if (t == NULL)
__collate_err(EX_OSERR, __FUNCTION__);
return t;
}
void
__collate_err(int ex, const char *f)
{
extern char *__progname; /* Program name, from crt0. */
const char *s;
int serrno = errno;
s = __progname;
write(STDERR_FILENO, s, strlen(s));
write(STDERR_FILENO, ": ", 2);
s = f;
write(STDERR_FILENO, s, strlen(s));
write(STDERR_FILENO, ": ", 2);
s = strerror(serrno);
write(STDERR_FILENO, s, strlen(s));
write(STDERR_FILENO, "\n", 1);
exit(ex);
}
#ifdef COLLATE_DEBUG
void
__collate_print_tables()
{
int i;
struct __collate_st_chain_pri *p2;
printf("Substitute table:\n");
for (i = 0; i < UCHAR_MAX + 1; i++)
if (i != *__collate_substitute_table[i])
printf("\t'%c' --> \"%s\"\n", i,
__collate_substitute_table[i]);
printf("Chain priority table:\n");
for (p2 = __collate_chain_pri_table; p2->str[0]; p2++)
printf("\t\"%s\" : %d %d\n\n", p2->str, p2->prim, p2->sec);
printf("Char priority table:\n");
for (i = 0; i < UCHAR_MAX + 1; i++)
printf("\t'%c' : %d %d\n", i, __collate_char_pri_table[i].prim,
__collate_char_pri_table[i].sec);
}
#endif