[gssapi-openssh.git] / openssh / openbsd-compat / strtonum.c

/* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */

/*	$OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $	*/

/*
 * Copyright (c) 2004 Ted Unangst and Todd Miller
 * All rights reserved.
 *
 * 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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 "includes.h"
#ifndef HAVE_STRTONUM
#include <limits.h>

#define INVALID 	1
#define TOOSMALL 	2
#define TOOLARGE 	3

long long
strtonum(const char *numstr, long long minval, long long maxval,
    const char **errstrp)
{
	long long ll = 0;
	char *ep;
	int error = 0;
	struct errval {
		const char *errstr;
		int err;
	} ev[4] = {
		{ NULL,		0 },
		{ "invalid",	EINVAL },
		{ "too small",	ERANGE },
		{ "too large",	ERANGE },
	};

	ev[0].err = errno;
	errno = 0;
	if (minval > maxval)
		error = INVALID;
	else {
		ll = strtoll(numstr, &ep, 10);
		if (numstr == ep || *ep != '\0')
			error = INVALID;
		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
			error = TOOSMALL;
		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
			error = TOOLARGE;
	}
	if (errstrp != NULL)
		*errstrp = ev[error].errstr;
	errno = ev[error].err;
	if (error)
		ll = 0;

	return (ll);
}

#endif /* HAVE_STRTONUM */
Commit	Line	Data
181e6f32	1	/* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */
	2
	3	/* $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $ */
	4
	5	/*
	6	* Copyright (c) 2004 Ted Unangst and Todd Miller
	7	* All rights reserved.
	8	*
	9	* Permission to use, copy, modify, and distribute this software for any
	10	* purpose with or without fee is hereby granted, provided that the above
	11	* copyright notice and this permission notice appear in all copies.
	12	*
	13	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	14	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	15	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	16	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	17	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	18	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	19	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
	20	*/
	21
	22	#include "includes.h"
	23	#ifndef HAVE_STRTONUM
	24	#include <limits.h>
	25
	26	#define INVALID 1
	27	#define TOOSMALL 2
	28	#define TOOLARGE 3
	29
	30	long long
	31	strtonum(const char *numstr, long long minval, long long maxval,
	32	const char **errstrp)
	33	{
	34	long long ll = 0;
	35	char *ep;
	36	int error = 0;
	37	struct errval {
	38	const char *errstr;
	39	int err;
	40	} ev[4] = {
	41	{ NULL, 0 },
	42	{ "invalid", EINVAL },
	43	{ "too small", ERANGE },
	44	{ "too large", ERANGE },
	45	};
	46
	47	ev[0].err = errno;
	48	errno = 0;
	49	if (minval > maxval)
	50	error = INVALID;
	51	else {
	52	ll = strtoll(numstr, &ep, 10);
	53	if (numstr == ep \|\| *ep != '\0')
	54	error = INVALID;
	55	else if ((ll == LLONG_MIN && errno == ERANGE) \|\| ll < minval)
	56	error = TOOSMALL;
	57	else if ((ll == LLONG_MAX && errno == ERANGE) \|\| ll > maxval)
	58	error = TOOLARGE;
	59	}
	60	if (errstrp != NULL)
	61	*errstrp = ev[error].errstr;
	62	errno = ev[error].err;
	63	if (error)
	64	ll = 0;
65
66	return (ll);
67	}
68
69	#endif /* HAVE_STRTONUM */