74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*-
|
|
* Copyright (C) Baptiste Daroussin <bapt@FreeBSD.org>
|
|
*
|
|
* 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 DAVID L. NUGENT 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 DAVID L. NUGENT 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.
|
|
*/
|
|
|
|
#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);
|
|
}
|