1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 2007-2009 H. Peter Anvin - All Rights Reserved
4 * Copyright 2009 Intel Corporation; author: H. Peter Anvin
5 *
6 * Permission is hereby granted, free of charge, to any person
7 * obtaining a copy of this software and associated documentation
8 * files (the "Software"), to deal in the Software without
9 * restriction, including without limitation the rights to use,
10 * copy, modify, merge, publish, distribute, sublicense, and/or
11 * sell copies of the Software, and to permit persons to whom
12 * the Software is furnished to do so, subject to the following
13 * conditions:
14 *
15 * The above copyright notice and this permission notice shall
16 * be included in all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
20 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
21 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
22 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
23 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
26 *
27 * ----------------------------------------------------------------------- */
28
29 /*
30 * suffix_number.c
31 *
32 * Convert a string of a number with potential SI suffix to int-type
33 */
34
35 #include <stdlib.h>
36 #include <suffix_number.h>
37
38 /* Get a value with a potential suffix (k/m/g/t/p/e) */
suffix_number(const char * str)39 unsigned long long suffix_number(const char *str)
40 {
41 char *ep;
42 unsigned long long v;
43 int shift;
44
45 v = strtoull(str, &ep, 0);
46 switch (*ep | 0x20) {
47 case 'k':
48 shift = 10;
49 break;
50 case 'm':
51 shift = 20;
52 break;
53 case 'g':
54 shift = 30;
55 break;
56 case 't':
57 shift = 40;
58 break;
59 case 'p':
60 shift = 50;
61 break;
62 case 'e':
63 shift = 60;
64 break;
65 default:
66 shift = 0;
67 break;
68 }
69 v <<= shift;
70
71 return v;
72 }
73