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#include <linux/smp.h>
19
20/*
21 * Allow cropping out bits beyond the end of the array.
22 * Move to "lib" directory if more clients want to use this routine.
23 */
24int bitmap_parselist_crop(const char *bp, unsigned long *maskp, int nmaskbits)
25{
26	unsigned a, b;
27
28	bitmap_zero(maskp, nmaskbits);
29	do {
30		if (!isdigit(*bp))
31			return -EINVAL;
32		a = simple_strtoul(bp, (char **)&bp, 10);
33		b = a;
34		if (*bp == '-') {
35			bp++;
36			if (!isdigit(*bp))
37				return -EINVAL;
38			b = simple_strtoul(bp, (char **)&bp, 10);
39		}
40		if (!(a <= b))
41			return -EINVAL;
42		if (b >= nmaskbits)
43			b = nmaskbits-1;
44		while (a <= b) {
45			set_bit(a, maskp);
46			a++;
47		}
48		if (*bp == ',')
49			bp++;
50	} while (*bp != '\0' && *bp != '\n');
51	return 0;
52}