Loading...
stdtime/timelocal.c /dev/null Libc-262.3.2
--- /dev/null
+++ Libc/Libc-262.3.2/stdtime/timelocal.c
@@ -0,0 +1,244 @@
+/*-
+ * 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: src/lib/libc/stdtime/timelocal.c,v 1.8.2.2 2000/10/26 16:21:35 ache Exp $
+ */
+
+#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 <unistd.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)
+	** Not used, just compatibility placeholder.
+	*/
+	NULL,
+
+	/* 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_2)
+		return;
+	for (i = 0; i < 12; i++)
+		_time_localebuf.alt_month[i] = _time_localebuf.month[i];
+}