setrunelocale.c revision 9d04e500a2b8dcd13abf3d813c6796aecd7a9689
/*
* Copyright 2011 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.
*/
#include "lint.h"
#include "file64.h"
#include <errno.h>
#include <limits.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <wchar.h>
#include "runetype.h"
#include "ldpart.h"
#include "mblocal.h"
#include "setlocale.h"
#include "_ctype.h"
#include "../i18n/_locale.h"
extern _RuneLocale *_Read_RuneMagi(FILE *);
extern unsigned char __ctype_C[];
static int __setrunelocale(const char *);
static int
__setrunelocale(const char *encoding)
{
FILE *fp;
char name[PATH_MAX];
_RuneLocale *rl;
int saverr, ret;
size_t (*old__mbrtowc)(wchar_t *_RESTRICT_KYWD,
const char *_RESTRICT_KYWD, size_t, mbstate_t *_RESTRICT_KYWD);
size_t (*old__wcrtomb)(char *_RESTRICT_KYWD, wchar_t,
mbstate_t *_RESTRICT_KYWD);
int (*old__mbsinit)(const mbstate_t *);
size_t (*old__mbsnrtowcs)(wchar_t *_RESTRICT_KYWD,
const char **_RESTRICT_KYWD, size_t, size_t,
mbstate_t *_RESTRICT_KYWD);
size_t (*old__wcsnrtombs)(char *_RESTRICT_KYWD,
const wchar_t **_RESTRICT_KYWD, size_t, size_t,
mbstate_t *_RESTRICT_KYWD);
static char ctype_encoding[ENCODING_LEN + 1];
static _RuneLocale *CachedRuneLocale;
static size_t (*Cached__mbrtowc)(wchar_t *_RESTRICT_KYWD,
const char *_RESTRICT_KYWD, size_t, mbstate_t *_RESTRICT_KYWD);
static size_t (*Cached__wcrtomb)(char *_RESTRICT_KYWD, wchar_t,
mbstate_t *_RESTRICT_KYWD);
static int (*Cached__mbsinit)(const mbstate_t *);
static size_t (*Cached__mbsnrtowcs)(wchar_t *_RESTRICT_KYWD,
const char **_RESTRICT_KYWD, size_t, size_t,
mbstate_t *_RESTRICT_KYWD);
static size_t (*Cached__wcsnrtombs)(char *_RESTRICT_KYWD,
const wchar_t **_RESTRICT_KYWD, size_t, size_t,
mbstate_t *_RESTRICT_KYWD);
/*
* The "C" and "POSIX" locale are always here.
*/
if (strcmp(encoding, "C") == 0 || strcmp(encoding, "POSIX") == 0) {
int i;
(void) memcpy(__ctype, __ctype_C, SZ_TOTAL);
for (i = 0; i < _CACHED_RUNES; i++) {
__ctype_mask[i] = _DefaultRuneLocale.__runetype[i];
__trans_upper[i] = _DefaultRuneLocale.__mapupper[i];
__trans_lower[i] = _DefaultRuneLocale.__maplower[i];
}
(void) _none_init(&_DefaultRuneLocale);
return (0);
}
/*
* If the locale name is the same as our cache, use the cache.
*/
if (CachedRuneLocale != NULL &&
strcmp(encoding, ctype_encoding) == 0) {
_CurrentRuneLocale = CachedRuneLocale;
__mbrtowc = Cached__mbrtowc;
__mbsinit = Cached__mbsinit;
__mbsnrtowcs = Cached__mbsnrtowcs;
__wcrtomb = Cached__wcrtomb;
__wcsnrtombs = Cached__wcsnrtombs;
return (0);
}
/*
* Slurp the locale file into the cache.
*/
(void) snprintf(name, sizeof (name), "%s/%s/LC_CTYPE/LCL_DATA",
_PathLocale, encoding);
if ((fp = fopen(name, "r")) == NULL)
return (errno == 0 ? ENOENT : errno);
if ((rl = _Read_RuneMagi(fp)) == NULL) {
saverr = (errno == 0 ? EINVAL : errno);
(void) fclose(fp);
return (saverr);
}
(void) fclose(fp);
old__mbrtowc = __mbrtowc;
old__mbsinit = __mbsinit;
old__mbsnrtowcs = __mbsnrtowcs;
old__wcrtomb = __wcrtomb;
old__wcsnrtombs = __wcsnrtombs;
__mbrtowc = NULL;
__mbsinit = NULL;
__mbsnrtowcs = __mbsnrtowcs_std;
__wcrtomb = NULL;
__wcsnrtombs = __wcsnrtombs_std;
if (strcmp(rl->__encoding, "NONE") == 0)
ret = _none_init(rl);
else if (strcmp(rl->__encoding, "ASCII") == 0)
ret = _ascii_init(rl);
else if (strcmp(rl->__encoding, "UTF-8") == 0)
ret = _UTF8_init(rl);
else if (strcmp(rl->__encoding, "EUC-CN") == 0)
ret = _EUC_CN_init(rl);
else if (strcmp(rl->__encoding, "EUC-JP") == 0)
ret = _EUC_JP_init(rl);
else if (strcmp(rl->__encoding, "EUC-KR") == 0)
ret = _EUC_KR_init(rl);
else if (strcmp(rl->__encoding, "EUC-TW") == 0)
ret = _EUC_TW_init(rl);
else if (strcmp(rl->__encoding, "GB18030") == 0)
ret = _GB18030_init(rl);
else if (strcmp(rl->__encoding, "GB2312") == 0)
ret = _GB2312_init(rl);
else if (strcmp(rl->__encoding, "GBK") == 0)
ret = _GBK_init(rl);
else if (strcmp(rl->__encoding, "BIG5") == 0)
ret = _BIG5_init(rl);
else if (strcmp(rl->__encoding, "MSKanji") == 0)
ret = _MSKanji_init(rl);
else
ret = EINVAL;
if (ret == 0) {
if (CachedRuneLocale != NULL) {
free(CachedRuneLocale);
}
CachedRuneLocale = _CurrentRuneLocale;
Cached__mbrtowc = __mbrtowc;
Cached__mbsinit = __mbsinit;
Cached__mbsnrtowcs = __mbsnrtowcs;
Cached__wcrtomb = __wcrtomb;
Cached__wcsnrtombs = __wcsnrtombs;
(void) strcpy(ctype_encoding, encoding);
/*
* We need to overwrite the _ctype array. This requires
* some finagling. This is because references to it may
* have been baked into applications.
*
* Note that it is interesting that toupper/tolower only
* produce defined results when the input is representable
* as a byte.
*/
/*
* The top half is the type mask array. Because we
* want to support both legacy Solaris code (which have
* mask valeus baked in to them), and we want to be able
* to import locale files from other sources (FreeBSD)
* which probably uses different masks, we have to perform
* a conversion here. Ugh. Note that the _CTYPE definitions
* we use from FreeBSD are richer than the Solaris legacy.
*
* We have to cope with these limitations though, because the
* inadequate Solaris definitions were baked into binaries.
*/
for (int i = 0; i < _CACHED_RUNES; i++) {
/* ctype can only encode the lower 8 bits. */
__ctype[i+1] = rl->__runetype[i] & 0xff;
__ctype_mask[i] = rl->__runetype[i];
}
/* The bottom half is the toupper/lower array */
for (int i = 0; i < _CACHED_RUNES; i++) {
__ctype[258 + i] = i;
if (rl->__mapupper[i] && rl->__mapupper[i] != i)
__ctype[258+i] = rl->__mapupper[i];
if (rl->__maplower[i] && rl->__maplower[i] != i)
__ctype[258+i] = rl->__maplower[i];
/* Don't forget these annoyances either! */
__trans_upper[i] = rl->__mapupper[i];
__trans_lower[i] = rl->__maplower[i];
}
/*
* Note that we expect the init code will have populated
* the CSWIDTH array (__ctype[514-520]) properly.
*/
} else {
__mbrtowc = old__mbrtowc;
__mbsinit = old__mbsinit;
__mbsnrtowcs = old__mbsnrtowcs;
__wcrtomb = old__wcrtomb;
__wcsnrtombs = old__wcsnrtombs;
free(rl);
}
return (ret);
}
int
__wrap_setrunelocale(const char *locale)
{
int ret = __setrunelocale(locale);
if (ret != 0) {
errno = ret;
return (_LDP_ERROR);
}
return (_LDP_LOADED);
}