| Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2010 Tilera Corporation. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation, version 2. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 11 | * NON INFRINGEMENT. See the GNU General Public License for |
| 12 | * more details. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/cpumask.h> |
| 16 | #include <linux/ctype.h> |
| 17 | #include <linux/errno.h> |
| 18 | |
| 19 | /* |
| 20 | * Allow cropping out bits beyond the end of the array. |
| 21 | * Move to "lib" directory if more clients want to use this routine. |
| 22 | */ |
| 23 | int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits) |
| 24 | { |
| 25 | unsigned a, b; |
| 26 | |
| 27 | bitmap_zero(maskp, nmaskbits); |
| 28 | do { |
| 29 | if (!isdigit(*bp)) |
| 30 | return -EINVAL; |
| 31 | a = simple_strtoul(bp, (char **)&bp, 10); |
| 32 | b = a; |
| 33 | if (*bp == '-') { |
| 34 | bp++; |
| 35 | if (!isdigit(*bp)) |
| 36 | return -EINVAL; |
| 37 | b = simple_strtoul(bp, (char **)&bp, 10); |
| 38 | } |
| 39 | if (!(a <= b)) |
| 40 | return -EINVAL; |
| 41 | if (b >= nmaskbits) |
| 42 | b = nmaskbits-1; |
| 43 | while (a <= b) { |
| 44 | set_bit(a, maskp); |
| 45 | a++; |
| 46 | } |
| 47 | if (*bp == ',') |
| 48 | bp++; |
| 49 | } while (*bp != '\0' && *bp != '\n'); |
| 50 | return 0; |
| 51 | } |