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Actually add the new code

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Baptiste Daroussin 2015-07-29 06:23:06 +00:00
parent 8411215a80
commit 22665b2563
1 changed files with 73 additions and 0 deletions
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usr.sbin/pw/strtounum.c Normal file
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/*-
* 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);
}