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/*-
* Copyright (C) Baptiste Daroussin <bapt@FreeBSD.org>
* 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
* in this position and unchanged.
* 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(S) ``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(S) 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <stdlib.h>
#include "pw.h"
#define INVALID "invalid"
#define TOOSMALL "too small"
#define TOOLARGE "too large"
uintmax_t
strtounum(const char *numstr, uintmax_t minval, uintmax_t maxval,
const char **errstrp)
{
uintmax_t ret = 0;
char *ep;
if (minval > maxval) {
errno = EINVAL;
if (errstrp != NULL)
*errstrp = INVALID;
return (0);
}
ret = strtoumax(numstr, &ep, 10);
if (errno == EINVAL || numstr == ep || *ep != '\0') {
errno = EINVAL;
if (errstrp != NULL)
*errstrp = INVALID;
return (0);
} else if ((ret == 0 && errno == ERANGE) || ret < minval) {
errno = ERANGE;
if (errstrp != NULL)
*errstrp = TOOSMALL;
return (0);
} else if ((ret == UINTMAX_MAX && errno == ERANGE) || ret > maxval) {
errno = ERANGE;
if (errstrp != NULL)
*errstrp = TOOLARGE;
return (0);
}
return (ret);
}
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