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/*
* Copyright (c) 1996 by Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
/*
* Portions copyright (c) 1999, 2000
* Intel Corporation.
* 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.
*
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by Intel Corporation and
* its contributors.
*
* 4. Neither the name of Intel Corporation or its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION 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 INTEL CORPORATION 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.
*
*/
/* Import. */
#include <arpa/nameser.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#define SPRINTF(x) ((size_t)sprintf x)
/* Forward. */
static int fmt1(int t, char s, char **buf, size_t *buflen);
/* Macros. */
#define T(x) if ((x) < 0) return (-1); else (void)NULL
/* Public. */
int
ns_format_ttl(u_long src, char *dst, size_t dstlen) {
char *odst = dst;
int secs, mins, hours, days, weeks, x;
char *p;
secs = (int)(src % 60); src /= 60;
mins = (int)(src % 60); src /= 60;
hours = (int)(src % 24); src /= 24;
days = (int)(src % 7); src /= 7;
weeks = (int)src; src = 0;
x = 0;
if (weeks) {
T(fmt1(weeks, 'W', &dst, &dstlen));
x++;
}
if (days) {
T(fmt1(days, 'D', &dst, &dstlen));
x++;
}
if (hours) {
T(fmt1(hours, 'H', &dst, &dstlen));
x++;
}
if (mins) {
T(fmt1(mins, 'M', &dst, &dstlen));
x++;
}
if (secs || !(weeks || days || hours || mins)) {
T(fmt1(secs, 'S', &dst, &dstlen));
x++;
}
if (x > 1) {
int ch;
for (p = odst; (ch = *p) != '\0'; p++)
if (isascii(ch) && isupper(ch))
*p = (char)( tolower(ch));
}
return ((int)(dst - odst));
}
int
ns_parse_ttl(const char *src, u_long *dst) {
u_long ttl, tmp;
int ch, digits, dirty;
ttl = 0;
tmp = 0;
digits = 0;
dirty = 0;
while ((ch = *src++) != '\0') {
if (!isascii(ch) || !isprint(ch))
goto einval;
if (isdigit(ch)) {
tmp *= 10;
tmp += (ch - '0');
digits++;
continue;
}
if (digits == 0)
goto einval;
if (islower(ch))
ch = toupper(ch);
switch (ch) {
case 'W': tmp *= 7;
case 'D': tmp *= 24;
case 'H': tmp *= 60;
case 'M': tmp *= 60;
case 'S': break;
default: goto einval;
}
ttl += tmp;
tmp = 0;
digits = 0;
dirty = 1;
}
if (digits > 0) {
if (dirty)
goto einval;
else
ttl += tmp;
}
*dst = ttl;
return (0);
einval:
errno = EINVAL;
return (-1);
}
/* Private. */
static int
fmt1(int t, char s, char **buf, size_t *buflen) {
char tmp[50];
size_t len;
len = SPRINTF((tmp, "%d%c", t, s));
if (len + 1 > *buflen)
return (-1);
strcpy(*buf, tmp);
*buf += len;
*buflen -= len;
return (0);
}
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