freebsd-dev/lib/libc/locale/rune.c
Andrey A. Chernov 76692b8025 Rewrite locale loading procedures, so any load failure will not affect
currently cached data.  It allows a number of nice things, like: removing
fallback code from single locale loading, remove memory leak when LC_CTYPE
data loaded again and again, efficient cache use, not only for
setlocale(locale1); setlocale(locale1), but for setlocale(locale1);
setlocale("C"); setlocale(locale1) too (i.e.  data file loaded only once).
2002-08-08 05:51:54 +00:00

199 lines
5.4 KiB
C

/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)rune.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <arpa/inet.h>
#include <errno.h>
#include <rune.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "un-namespace.h"
_RuneLocale *
_Read_RuneMagi(fp)
FILE *fp;
{
char *data;
void *lastp;
_RuneLocale *rl;
_RuneEntry *rr;
struct stat sb;
int x, saverr;
if (_fstat(fileno(fp), &sb) < 0)
return (NULL);
if (sb.st_size < sizeof(_RuneLocale)) {
errno = EFTYPE;
return (NULL);
}
if ((data = malloc(sb.st_size)) == NULL) {
errno = ENOMEM;
return (NULL);
}
errno = 0;
rewind(fp); /* Someone might have read the magic number once already */
if (errno) {
saverr = errno;
free(data);
errno = saverr;
return (NULL);
}
if (fread(data, sb.st_size, 1, fp) != 1) {
saverr = errno;
free(data);
errno = saverr;
return (NULL);
}
rl = (_RuneLocale *)data;
lastp = data + sb.st_size;
rl->variable = rl + 1;
if (memcmp(rl->magic, _RUNE_MAGIC_1, sizeof(rl->magic))) {
free(data);
errno = EFTYPE;
return (NULL);
}
rl->invalid_rune = ntohl(rl->invalid_rune);
rl->variable_len = ntohl(rl->variable_len);
rl->runetype_ext.nranges = ntohl(rl->runetype_ext.nranges);
rl->maplower_ext.nranges = ntohl(rl->maplower_ext.nranges);
rl->mapupper_ext.nranges = ntohl(rl->mapupper_ext.nranges);
for (x = 0; x < _CACHED_RUNES; ++x) {
rl->runetype[x] = ntohl(rl->runetype[x]);
rl->maplower[x] = ntohl(rl->maplower[x]);
rl->mapupper[x] = ntohl(rl->mapupper[x]);
}
rl->runetype_ext.ranges = (_RuneEntry *)rl->variable;
rl->variable = rl->runetype_ext.ranges + rl->runetype_ext.nranges;
if (rl->variable > lastp) {
free(data);
errno = EFTYPE;
return (NULL);
}
rl->maplower_ext.ranges = (_RuneEntry *)rl->variable;
rl->variable = rl->maplower_ext.ranges + rl->maplower_ext.nranges;
if (rl->variable > lastp) {
free(data);
errno = EFTYPE;
return (NULL);
}
rl->mapupper_ext.ranges = (_RuneEntry *)rl->variable;
rl->variable = rl->mapupper_ext.ranges + rl->mapupper_ext.nranges;
if (rl->variable > lastp) {
free(data);
errno = EFTYPE;
return (NULL);
}
for (x = 0; x < rl->runetype_ext.nranges; ++x) {
rr = rl->runetype_ext.ranges;
rr[x].min = ntohl(rr[x].min);
rr[x].max = ntohl(rr[x].max);
if ((rr[x].map = ntohl(rr[x].map)) == 0) {
int len = rr[x].max - rr[x].min + 1;
rr[x].types = rl->variable;
rl->variable = rr[x].types + len;
if (rl->variable > lastp) {
free(data);
errno = EFTYPE;
return (NULL);
}
while (len-- > 0)
rr[x].types[len] = ntohl(rr[x].types[len]);
} else
rr[x].types = 0;
}
for (x = 0; x < rl->maplower_ext.nranges; ++x) {
rr = rl->maplower_ext.ranges;
rr[x].min = ntohl(rr[x].min);
rr[x].max = ntohl(rr[x].max);
rr[x].map = ntohl(rr[x].map);
}
for (x = 0; x < rl->mapupper_ext.nranges; ++x) {
rr = rl->mapupper_ext.ranges;
rr[x].min = ntohl(rr[x].min);
rr[x].max = ntohl(rr[x].max);
rr[x].map = ntohl(rr[x].map);
}
if (((char *)rl->variable) + rl->variable_len > (char *)lastp) {
free(data);
errno = EFTYPE;
return (NULL);
}
/*
* Go out and zero pointers that should be zero.
*/
if (!rl->variable_len)
rl->variable = 0;
if (!rl->runetype_ext.nranges)
rl->runetype_ext.ranges = 0;
if (!rl->maplower_ext.nranges)
rl->maplower_ext.ranges = 0;
if (!rl->mapupper_ext.nranges)
rl->mapupper_ext.ranges = 0;
return (rl);
}