mirror of
https://gitlab.freedesktop.org/libbsd/libbsd.git
synced 2025-04-17 07:13:30 +02:00
61b2dbb8f5
Do not allow numbers greated than INT64_MAX and smaller than INT64_MIN. Clarify the positive sign value by prefixing it with an explicit +. Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=66909
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*
|
|
* Copyright © 2012-2013 Guillem Jover <guillem@hadrons.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.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``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 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>
|
|
|
|
#include <errno.h>
|
|
#include <ctype.h>
|
|
#include <libutil.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
|
|
int
|
|
dehumanize_number(const char *buf, int64_t *num)
|
|
{
|
|
uint64_t rval, rmax;
|
|
int sign = +1;
|
|
int rc;
|
|
|
|
/* The current expand_number() implementation uses bit shifts, so
|
|
* we cannot pass negative numbers, preserve the sign and apply it
|
|
* later. */
|
|
while (isspace(*buf))
|
|
buf++;
|
|
if (*buf == '-') {
|
|
sign = -1;
|
|
buf++;
|
|
}
|
|
|
|
rc = expand_number(buf, &rval);
|
|
if (rc < 0)
|
|
return rc;
|
|
|
|
/* The sign has been stripped, so rval has the absolute value.
|
|
* Error out, regardless of the sign, if rval is greater than
|
|
* abs(INT64_MIN) (== INT64_MAX + 1), or if the sign is positive
|
|
* and the value has overflown by one (INT64_MAX + 1). */
|
|
rmax = INT64_MAX + 1ULL;
|
|
if (rval > rmax || (rval == rmax && sign == +1)) {
|
|
errno = ERANGE;
|
|
return -1;
|
|
}
|
|
*num = rval * sign;
|
|
|
|
return 0;
|
|
}
|