1 /* $NetBSD: dehumanize_number.c,v 1.3 2008/04/28 20:22:59 martin Exp $ */
2 /* $DragonFly: src/lib/libutil/dehumanize_number.c,v 1.2 2008/10/29 22:03:12 swildner Exp $ */
5 * Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Julio M. Merino Vidal, developed as part of Google's Summer of Code
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
44 * Converts the number given in 'str', which may be given in a humanized
45 * form (as described in humanize_number(3), but with some limitations),
46 * to an int64_t without units.
47 * In case of success, 0 is returned and *size holds the value.
48 * Otherwise, -1 is returned and *size is untouched.
50 * TODO: Internationalization, SI units.
53 dehumanize_number(const char *str
, int64_t *size
)
70 if (isalpha((unsigned char)unit
)) {
71 switch (tolower((unsigned char)unit
)) {
81 multiplier
= 1024 * 1024;
85 multiplier
= 1024 * 1024 * 1024;
90 return -1; /* Invalid suffix. */
93 delimit
= &str
[len
- 1];
98 tmp
= strtoll(str
, &ep
, 10);
99 if (str
[0] == '\0' || (ep
!= delimit
&& *ep
!= '\0'))
100 return -1; /* Not a number. */
101 else if (errno
== ERANGE
&& (tmp
== LLONG_MAX
|| tmp
== LLONG_MIN
))
102 return -1; /* Out of range. */
104 tmp2
= tmp
* multiplier
;
105 tmp2
= tmp2
/ multiplier
;
108 return -1; /* Out of range. */
110 *size
= tmp
* multiplier
;