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File: [cvs.NetBSD.org] / src / lib / libc / nameser / ns_ttl.c (download)

Revision 1.8, Tue Mar 13 21:13:39 2012 UTC (8 years, 8 months ago) by christos
Branch: MAIN
CVS Tags: yamt-pagecache-base9, yamt-pagecache-base8, yamt-pagecache-base7, yamt-pagecache-base6, yamt-pagecache-base5, yamt-pagecache-base4, tls-maxphys-base, tls-maxphys, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, riastradh-drm2-base2, riastradh-drm2-base1, riastradh-drm2-base, riastradh-drm2, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-1-RELEASE, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, matt-nb8-mediatek-base, matt-nb8-mediatek, localcount-20160914, is-mlppp-base, is-mlppp, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, agc-symver-base, agc-symver, HEAD
Changes since 1.7: +10 -8 lines

PR/45989: Martin Husemann: lint invocation does include -w only on i386

- turn lint -w for all the platforms after fixing the lint warnings.
- add _DIAGASSERTS() for casts that would assign values to types that
  would not fit.
- change types, add casts
- change into ansii prototypes
- turn on _DIAGNOSTIC for libc (during current, to be eliminated for release
  builds)

approved by core@

/*	$NetBSD: ns_ttl.c,v 1.8 2012/03/13 21:13:39 christos Exp $	*/

/*
 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
 * Copyright (c) 1996,1999 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 ISC DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC 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.
 */

#include <sys/cdefs.h>
#ifndef lint
#ifdef notdef
static const char rcsid[] = "Id: ns_ttl.c,v 1.4 2005/07/28 06:51:49 marka Exp";
#else
__RCSID("$NetBSD: ns_ttl.c,v 1.8 2012/03/13 21:13:39 christos Exp $");
#endif
#endif

/* Import. */

#include "port_before.h"

#include <arpa/nameser.h>

#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

#include "port_after.h"

#ifdef SPRINTF_CHAR
# define SPRINTF(x) strlen(sprintf/**/x)
#else
# define SPRINTF(x) ((size_t)sprintf x)
#endif

/* Forward. */

static int	fmt1(int t, char s, char **buf, size_t *buflen);

/* Macros. */

#define T(x) if ((x) < 0) return (-1)

/* 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 = tolower(ch);
	}

	_DIAGASSERT(__type_fit(int, dst - odst));
	return (int)(dst - odst);
}

#ifndef _LIBC
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;	/*FALLTHROUGH*/
		case 'D':  tmp *= 24;	/*FALLTHROUGH*/
		case 'H':  tmp *= 60;	/*FALLTHROUGH*/
		case 'M':  tmp *= 60;	/*FALLTHROUGH*/
		case 'S':  break;
		default:   goto einval;
		}
		ttl += tmp;
		tmp = 0;
		digits = 0;
		dirty = 1;
	}
	if (digits > 0) {
		if (dirty)
			goto einval;
		else
			ttl += tmp;
	} else if (!dirty)
		goto einval;
	*dst = ttl;
	return (0);

 einval:
	errno = EINVAL;
	return (-1);
}
#endif

/* 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);
}

/*! \file */