freebsd-dev/lib/libc/locale/rune.c
Baptiste Daroussin 7b2473410f Revamp CTYPE support (from Illumos & Dragonfly)
Obtained from:	Dragonfly
2015-08-08 18:22:14 +00:00

252 lines
6.8 KiB
C

/*-
* Copyright 2014 Garrett D'Amore <garrett@damore.org>
* Copyright 2010 Nexenta Systems, Inc. All rights reserved.
* 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.
* 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 <runetype.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include "un-namespace.h"
#include "runefile.h"
_RuneLocale *
_Read_RuneMagi(const char *fname)
{
char *fdata, *data;
void *lastp;
_FileRuneLocale *frl;
_RuneLocale *rl;
_FileRuneEntry *frr;
_RuneEntry *rr;
struct stat sb;
int x, saverr;
void *variable;
_FileRuneEntry *runetype_ext_ranges;
_FileRuneEntry *maplower_ext_ranges;
_FileRuneEntry *mapupper_ext_ranges;
int runetype_ext_len = 0;
int fd;
if ((fd = _open(fname, O_RDONLY)) < 0) {
errno = EINVAL;
return (NULL);
}
if (_fstat(fd, &sb) < 0) {
(void) _close(fd);
errno = EINVAL;
return (NULL);
}
if ((size_t)sb.st_size < sizeof (_FileRuneLocale)) {
(void) _close(fd);
errno = EINVAL;
return (NULL);
}
fdata = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
(void) _close(fd);
if (fdata == NULL) {
errno = EINVAL;
return (NULL);
}
frl = (_FileRuneLocale *)(void *)fdata;
lastp = fdata + sb.st_size;
variable = frl + 1;
if (memcmp(frl->magic, _FILE_RUNE_MAGIC_1, sizeof (frl->magic))) {
goto invalid;
}
runetype_ext_ranges = (_FileRuneEntry *)variable;
variable = runetype_ext_ranges + frl->runetype_ext_nranges;
if (variable > lastp) {
goto invalid;
}
maplower_ext_ranges = (_FileRuneEntry *)variable;
variable = maplower_ext_ranges + frl->maplower_ext_nranges;
if (variable > lastp) {
goto invalid;
}
mapupper_ext_ranges = (_FileRuneEntry *)variable;
variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
if (variable > lastp) {
goto invalid;
}
frr = runetype_ext_ranges;
for (x = 0; x < frl->runetype_ext_nranges; ++x) {
uint32_t *types;
if (frr[x].map == 0) {
int len = frr[x].max - frr[x].min + 1;
types = variable;
variable = types + len;
runetype_ext_len += len;
if (variable > lastp) {
goto invalid;
}
}
}
if ((char *)variable + frl->variable_len > (char *)lastp) {
goto invalid;
}
/*
* Convert from disk format to host format.
*/
data = malloc(sizeof(_RuneLocale) +
(frl->runetype_ext_nranges + frl->maplower_ext_nranges +
frl->mapupper_ext_nranges) * sizeof(_RuneEntry) +
runetype_ext_len * sizeof(*rr->__types) +
frl->variable_len);
if (data == NULL) {
saverr = errno;
munmap(fdata, sb.st_size);
errno = saverr;
return (NULL);
}
rl = (_RuneLocale *)data;
rl->__variable = rl + 1;
memcpy(rl->__magic, _RUNE_MAGIC_1, sizeof(rl->__magic));
memcpy(rl->__encoding, frl->encoding, sizeof(rl->__encoding));
rl->__variable_len = frl->variable_len;
rl->__runetype_ext.__nranges = frl->runetype_ext_nranges;
rl->__maplower_ext.__nranges = frl->maplower_ext_nranges;
rl->__mapupper_ext.__nranges = frl->mapupper_ext_nranges;
for (x = 0; x < _CACHED_RUNES; ++x) {
rl->__runetype[x] = frl->runetype[x];
rl->__maplower[x] = frl->maplower[x];
rl->__mapupper[x] = frl->mapupper[x];
}
rl->__runetype_ext.__ranges = (_RuneEntry *)rl->__variable;
rl->__variable = rl->__runetype_ext.__ranges +
rl->__runetype_ext.__nranges;
rl->__maplower_ext.__ranges = (_RuneEntry *)rl->__variable;
rl->__variable = rl->__maplower_ext.__ranges +
rl->__maplower_ext.__nranges;
rl->__mapupper_ext.__ranges = (_RuneEntry *)rl->__variable;
rl->__variable = rl->__mapupper_ext.__ranges +
rl->__mapupper_ext.__nranges;
variable = mapupper_ext_ranges + frl->mapupper_ext_nranges;
frr = runetype_ext_ranges;
rr = rl->__runetype_ext.__ranges;
for (x = 0; x < rl->__runetype_ext.__nranges; ++x) {
uint32_t *types;
rr[x].__min = frr[x].min;
rr[x].__max = frr[x].max;
rr[x].__map = frr[x].map;
if (rr[x].__map == 0) {
int len = rr[x].__max - rr[x].__min + 1;
types = variable;
variable = types + len;
rr[x].__types = rl->__variable;
rl->__variable = rr[x].__types + len;
while (len-- > 0)
rr[x].__types[len] = types[len];
} else
rr[x].__types = NULL;
}
frr = maplower_ext_ranges;
rr = rl->__maplower_ext.__ranges;
for (x = 0; x < rl->__maplower_ext.__nranges; ++x) {
rr[x].__min = frr[x].min;
rr[x].__max = frr[x].max;
rr[x].__map = frr[x].map;
}
frr = mapupper_ext_ranges;
rr = rl->__mapupper_ext.__ranges;
for (x = 0; x < rl->__mapupper_ext.__nranges; ++x) {
rr[x].__min = frr[x].min;
rr[x].__max = frr[x].max;
rr[x].__map = frr[x].map;
}
memcpy(rl->__variable, variable, rl->__variable_len);
munmap(fdata, sb.st_size);
/*
* Go out and zero pointers that should be zero.
*/
if (!rl->__variable_len)
rl->__variable = NULL;
if (!rl->__runetype_ext.__nranges)
rl->__runetype_ext.__ranges = NULL;
if (!rl->__maplower_ext.__nranges)
rl->__maplower_ext.__ranges = NULL;
if (!rl->__mapupper_ext.__nranges)
rl->__mapupper_ext.__ranges = NULL;
return (rl);
invalid:
munmap(fdata, sb.st_size);
errno = EINVAL;
return (NULL);
}