2 * Copyright (c) 2007 Eric Anderson <anderson@FreeBSD.org>
3 * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 // #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD: src/lib/libutil/expand_number.c,v 1.2.4.2 2009/06/10 14:52:34 des Exp $");
31 #include <sys/types.h>
35 //#include <libutil.h>
39 * Convert an expression of the following forms to a int64_t.
40 * 1) A positive decimal number.
41 * 2) A positive decimal number followed by a 'b' or 'B' (mult by 1).
42 * 3) A positive decimal number followed by a 'k' or 'K' (mult by 1 << 10).
43 * 4) A positive decimal number followed by a 'm' or 'M' (mult by 1 << 20).
44 * 5) A positive decimal number followed by a 'g' or 'G' (mult by 1 << 30).
45 * 6) A positive decimal number followed by a 't' or 'T' (mult by 1 << 40).
46 * 7) A positive decimal number followed by a 'p' or 'P' (mult by 1 << 50).
47 * 8) A positive decimal number followed by a 'e' or 'E' (mult by 1 << 60).
50 expand_number(const char *buf, int64_t *num)
52 static const char unit[] = "bkmgtpe";
57 number = strtoimax(buf, &endptr, 0);
60 /* No valid digits. */
65 if (*endptr == '\0') {
82 /* Unrecognized unit. */
87 for (i = 0; unit[i] != '\0'; i++) {
90 if ((number < 0 && (number << 10) > number) ||
91 (number >= 0 && (number << 10) < number)) {