68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* $Id: compat_strtonum.c,v 1.2 2020/06/15 01:37:15 schwarze Exp $ */
|
|
/* $OpenBSD: strtonum.c,v 1.8 2015/09/13 08:31:48 guenther 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 "config.h"
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdlib.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;
|
|
int error = 0;
|
|
char *ep;
|
|
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);
|
|
}
|