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Switch dehumanize_number() to use expand_number()

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The function is a duplicate of expand_number(), but covering less
prefixes and with a slightly different function signature.

Spotted-by: Peter da Silva <resuna@gmail.com>
This commit is contained in:
Guillem Jover 2012-12-27 11:19:20 +01:00
parent 330b569fe3
commit d3a09e1cf4
2 changed files with 39 additions and 91 deletions
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2
COPYING
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@ -201,7 +201,7 @@ The rest of the licenses apply to code and/or man pages.
--
Copyright © 1997-2000, 2002, 2005, 2006, 2008 The NetBSD Foundation, Inc.
Copyright © 1997-2000, 2002, 2008 The NetBSD Foundation, Inc.
All rights reserved.
Some code was contributed to The NetBSD Foundation by Allen Briggs.

128
src/dehumanize_number.c
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@ -1,12 +1,5 @@
/* $NetBSD: dehumanize_number.c,v 1.2 2007/12/14 17:32:47 xtraeme Exp $ */
/*
* Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Julio M. Merino Vidal, developed as part of Google's Summer of Code
* 2005 program.
* Copyright © 2012 Guillem Jover <guillem@hadrons.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -16,99 +9,54 @@
* 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 BY THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION 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.
* 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>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: dehumanize_number.c,v 1.2 2007/12/14 17:32:47 xtraeme Exp $");
#endif /* LIBC_SCCS and not lint */
#include <inttypes.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <ctype.h>
#include <libutil.h>
#include <stdint.h>
#include <stdlib.h>
/*
* Converts the number given in 'str', which may be given in a humanized
* form (as described in humanize_number(3), but with some limitations),
* to an int64_t without units.
* In case of success, 0 is returned and *size holds the value.
* Otherwise, -1 is returned and *size is untouched.
*
* TODO: Internationalization, SI units.
*/
int
dehumanize_number(const char *str, int64_t *size)
dehumanize_number(const char *buf, int64_t *num)
{
char *ep, unit;
const char *delimit;
long multiplier;
long long tmp, tmp2;
size_t len;
uint64_t rval;
int sign = 1;
int rc;
len = strlen(str);
if (len == 0) {
errno = EINVAL;
/* 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;
if (rval == UINT64_MAX && sign == -1) {
errno = ERANGE;
return -1;
}
multiplier = 1;
unit = str[len - 1];
if (isalpha((unsigned char)unit)) {
switch (tolower((unsigned char)unit)) {
case 'b':
multiplier = 1;
break;
case 'k':
multiplier = 1024;
break;
case 'm':
multiplier = 1024 * 1024;
break;
case 'g':
multiplier = 1024 * 1024 * 1024;
break;
default:
errno = EINVAL;
return -1; /* Invalid suffix. */
}
delimit = &str[len - 1];
} else
delimit = NULL;
errno = 0;
tmp = strtoll(str, &ep, 10);
if (str[0] == '\0' || (ep != delimit && *ep != '\0'))
return -1; /* Not a number. */
else if (errno == ERANGE && (tmp == LLONG_MAX || tmp == LLONG_MIN))
return -1; /* Out of range. */
tmp2 = tmp * multiplier;
tmp2 = tmp2 / multiplier;
if (tmp != tmp2) {
errno = ERANGE;
return -1; /* Out of range. */
}
*size = tmp * multiplier;
*num = rval * sign;
return 0;
}