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/*-
* Copyright (c) 1997 FreeBSD Inc.
* 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 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/syslimits.h>
#include <fcntl.h>
#include <locale.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "setlocale.h"
#include "timelocal.h"
static int split_lines(char *, const char *);
static void set_from_buf(const char *, int);
struct lc_time_T _time_localebuf;
int _time_using_locale;
#define LCTIME_SIZE_FULL (sizeof(struct lc_time_T) / sizeof(char *))
#define LCTIME_SIZE_1 \
(offsetof(struct lc_time_T, alt_month[0]) / sizeof(char *))
#define LCTIME_SIZE_2 \
(offsetof(struct lc_time_T, Ef_fmt) / sizeof(char *))
const struct lc_time_T _C_time_locale = {
{
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
}, {
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
}, {
"Sun", "Mon", "Tue", "Wed",
"Thu", "Fri", "Sat"
}, {
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
},
/* X_fmt */
"%H:%M:%S",
/*
** x_fmt
** Since the C language standard calls for
** "date, using locale's date format," anything goes.
** Using just numbers (as here) makes Quakers happier;
** it's also compatible with SVR4.
*/
"%m/%d/%y",
/*
** c_fmt (ctime-compatible)
** Note that
** "%a %b %d %H:%M:%S %Y"
** is used by Solaris 2.3.
*/
"%a %Ef %X %Y",
/* am */
"AM",
/* pm */
"PM",
/* date_fmt */
"%a %Ef %X %Z %Y",
{
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
},
/* Ef_fmt
** To determine short months / day order
*/
"%b %e",
/* EF_fmt
** To determine long months / day order
*/
"%B %e"
};
int
__time_load_locale(const char *name)
{
static char * locale_buf;
static char locale_buf_C[] = "C";
static int num_lines;
int fd;
char * lbuf;
char * p;
const char * plim;
char filename[PATH_MAX];
struct stat st;
size_t namesize;
size_t bufsize;
int save_using_locale;
save_using_locale = _time_using_locale;
_time_using_locale = 0;
if (name == NULL)
goto no_locale;
if (!strcmp(name, "C") || !strcmp(name, "POSIX"))
return 0;
/*
** If the locale name is the same as our cache, use the cache.
*/
lbuf = locale_buf;
if (lbuf != NULL && strcmp(name, lbuf) == 0) {
set_from_buf(lbuf, num_lines);
_time_using_locale = 1;
return 0;
}
/*
** Slurp the locale file into the cache.
*/
namesize = strlen(name) + 1;
if (!_PathLocale)
goto no_locale;
/* Range checking not needed, 'name' size is limited */
strcpy(filename, _PathLocale);
strcat(filename, "/");
strcat(filename, name);
strcat(filename, "/LC_TIME");
fd = _open(filename, O_RDONLY);
if (fd < 0)
goto no_locale;
if (fstat(fd, &st) != 0)
goto bad_locale;
if (st.st_size <= 0)
goto bad_locale;
bufsize = namesize + st.st_size;
locale_buf = NULL;
lbuf = (lbuf == NULL || lbuf == locale_buf_C) ?
malloc(bufsize) : reallocf(lbuf, bufsize);
if (lbuf == NULL)
goto bad_locale;
(void) strcpy(lbuf, name);
p = lbuf + namesize;
plim = p + st.st_size;
if (_read(fd, p, (size_t) st.st_size) != st.st_size)
goto bad_lbuf;
if (_close(fd) != 0)
goto bad_lbuf;
/*
** Parse the locale file into localebuf.
*/
if (plim[-1] != '\n')
goto bad_lbuf;
num_lines = split_lines(p, plim);
if (num_lines >= LCTIME_SIZE_FULL)
num_lines = LCTIME_SIZE_FULL;
else if (num_lines >= LCTIME_SIZE_2)
num_lines = LCTIME_SIZE_2;
else if (num_lines >= LCTIME_SIZE_1)
num_lines = LCTIME_SIZE_1;
else
goto reset_locale;
set_from_buf(lbuf, num_lines);
/*
** Record the successful parse in the cache.
*/
locale_buf = lbuf;
_time_using_locale = 1;
return 0;
reset_locale:
/*
* XXX - This may not be the correct thing to do in this case.
* setlocale() assumes that we left the old locale alone.
*/
locale_buf = locale_buf_C;
_time_localebuf = _C_time_locale;
save_using_locale = 0;
bad_lbuf:
free(lbuf);
bad_locale:
(void)_close(fd);
no_locale:
_time_using_locale = save_using_locale;
return -1;
}
static int
split_lines(char *p, const char *plim)
{
int i;
for (i = 0; p < plim; i++) {
p = strchr(p, '\n');
*p++ = '\0';
}
return i;
}
static void
set_from_buf(const char *p, int num_lines)
{
const char **ap;
int i;
for (ap = (const char **) &_time_localebuf, i = 0;
i < num_lines; ++ap, ++i)
*ap = p += strlen(p) + 1;
if (num_lines == LCTIME_SIZE_FULL)
return;
for (i = 0; i < 12; i++)
_time_localebuf.alt_month[i] = _time_localebuf.month[i];
}
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