freebsd-dev/lib/libc/locale/collate.c

299 lines
7.9 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <arpa/inet.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sysexits.h>
#include "un-namespace.h"
#include "collate.h"
#include "setlocale.h"
#include "ldpart.h"
#include "libc_private.h"
int __collate_load_error = 1;
int __collate_substitute_nontrivial;
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;
void __collate_err(int ex, const char *f) __dead2;
int
__collate_load_tables(const char *encoding)
{
FILE *fp;
int i, saverr, chains;
uint32_t u32;
char strbuf[STR_LEN], buf[PATH_MAX];
void *TMP_substitute_table, *TMP_char_pri_table, *TMP_chain_pri_table;
static char collate_encoding[ENCODING_LEN + 1];
/* 'encoding' must be already checked. */
if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
__collate_load_error = 1;
return (_LDP_CACHE);
}
/*
* If the locale name is the same as our cache, use the cache.
*/
if (strcmp(encoding, collate_encoding) == 0) {
__collate_load_error = 0;
return (_LDP_CACHE);
}
/*
* Slurp the locale file into the cache.
*/
/* 'PathLocale' must be already set & checked. */
/* 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)
return (_LDP_ERROR);
if (fread(strbuf, sizeof(strbuf), 1, fp) != 1) {
saverr = errno;
(void)fclose(fp);
errno = saverr;
return (_LDP_ERROR);
}
chains = -1;
if (strcmp(strbuf, COLLATE_VERSION) == 0)
chains = 0;
else if (strcmp(strbuf, COLLATE_VERSION1_2) == 0)
chains = 1;
if (chains < 0) {
(void)fclose(fp);
errno = EFTYPE;
return (_LDP_ERROR);
}
if (chains) {
if (fread(&u32, sizeof(u32), 1, fp) != 1) {
saverr = errno;
(void)fclose(fp);
errno = saverr;
return (_LDP_ERROR);
}
if ((chains = (int)ntohl(u32)) < 1) {
(void)fclose(fp);
errno = EFTYPE;
return (_LDP_ERROR);
}
} else
chains = TABLE_SIZE;
if ((TMP_substitute_table =
malloc(sizeof(__collate_substitute_table))) == NULL) {
saverr = errno;
(void)fclose(fp);
errno = saverr;
return (_LDP_ERROR);
}
if ((TMP_char_pri_table =
malloc(sizeof(__collate_char_pri_table))) == NULL) {
saverr = errno;
free(TMP_substitute_table);
(void)fclose(fp);
errno = saverr;
return (_LDP_ERROR);
}
if ((TMP_chain_pri_table =
malloc(sizeof(*__collate_chain_pri_table) * chains)) == NULL) {
saverr = errno;
free(TMP_substitute_table);
free(TMP_char_pri_table);
(void)fclose(fp);
errno = saverr;
return (_LDP_ERROR);
}
#define FREAD(a, b, c, d) \
{ \
if (fread(a, b, c, d) != c) { \
saverr = errno; \
free(TMP_substitute_table); \
free(TMP_char_pri_table); \
free(TMP_chain_pri_table); \
(void)fclose(d); \
errno = saverr; \
return (_LDP_ERROR); \
} \
}
FREAD(TMP_substitute_table, sizeof(__collate_substitute_table), 1, fp);
FREAD(TMP_char_pri_table, sizeof(__collate_char_pri_table), 1, fp);
FREAD(TMP_chain_pri_table,
sizeof(*__collate_chain_pri_table), chains, fp);
(void)fclose(fp);
(void)strcpy(collate_encoding, encoding);
if (__collate_substitute_table_ptr != NULL)
free(__collate_substitute_table_ptr);
__collate_substitute_table_ptr = TMP_substitute_table;
if (__collate_char_pri_table_ptr != NULL)
free(__collate_char_pri_table_ptr);
__collate_char_pri_table_ptr = TMP_char_pri_table;
for (i = 0; i < UCHAR_MAX + 1; i++) {
__collate_char_pri_table[i].prim =
ntohl(__collate_char_pri_table[i].prim);
__collate_char_pri_table[i].sec =
ntohl(__collate_char_pri_table[i].sec);
}
if (__collate_chain_pri_table != NULL)
free(__collate_chain_pri_table);
__collate_chain_pri_table = TMP_chain_pri_table;
for (i = 0; i < chains; i++) {
__collate_chain_pri_table[i].prim =
ntohl(__collate_chain_pri_table[i].prim);
__collate_chain_pri_table[i].sec =
ntohl(__collate_chain_pri_table[i].sec);
}
__collate_substitute_nontrivial = 0;
for (i = 0; i < UCHAR_MAX + 1; i++) {
if (__collate_substitute_table[i][0] != i ||
__collate_substitute_table[i][1] != 0) {
__collate_substitute_nontrivial = 1;
break;
}
}
__collate_load_error = 0;
return (_LDP_LOADED);
}
u_char *
__collate_substitute(const u_char *s)
{
int dest_len, len, nlen;
int delta = strlen(s);
u_char *dest_str = NULL;
if (s == NULL || *s == '\0')
return (__collate_strdup(""));
delta += delta / 8;
dest_str = malloc(dest_len = delta);
if (dest_str == NULL)
__collate_err(EX_OSERR, __func__);
len = 0;
while (*s) {
nlen = len + strlen(__collate_substitute_table[*s]);
if (dest_len <= nlen) {
dest_str = reallocf(dest_str, dest_len = nlen + delta);
if (dest_str == NULL)
__collate_err(EX_OSERR, __func__);
}
(void)strcpy(dest_str + len, __collate_substitute_table[*s++]);
len = nlen;
}
return (dest_str);
}
void
__collate_lookup(const u_char *t, int *len, int *prim, int *sec)
{
struct __collate_st_chain_pri *p2;
*len = 1;
*prim = *sec = 0;
for (p2 = __collate_chain_pri_table; p2->str[0] != '\0'; p2++) {
if (*t == p2->str[0] &&
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(u_char *s)
{
u_char *t = strdup(s);
if (t == NULL)
__collate_err(EX_OSERR, __func__);
return (t);
}
void
__collate_err(int ex, const char *f)
{
const char *s;
int serrno = errno;
s = _getprogname();
_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] != '\0'; p2++)
printf("\t\"%s\" : %d %d\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