Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Arnaldo Carvalho de Melo |
285 |
35.67% |
2 |
9.09% |
| Jiri Olsa |
250 |
31.29% |
4 |
18.18% |
| Matthew Wilcox |
102 |
12.77% |
3 |
13.64% |
| Alexey Budankov |
88 |
11.01% |
1 |
4.55% |
| Frédéric Weisbecker |
34 |
4.26% |
3 |
13.64% |
| Yury Norov |
18 |
2.25% |
5 |
22.73% |
| Alexey Bayduraev |
15 |
1.88% |
1 |
4.55% |
| Kees Cook |
4 |
0.50% |
1 |
4.55% |
| Andy Shevchenko |
2 |
0.25% |
1 |
4.55% |
| Greg Kroah-Hartman |
1 |
0.13% |
1 |
4.55% |
| Total |
799 |
|
22 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _TOOLS_LINUX_BITMAP_H
#define _TOOLS_LINUX_BITMAP_H
#include <string.h>
#include <linux/bitops.h>
#include <linux/find.h>
#include <stdlib.h>
#include <linux/kernel.h>
#define DECLARE_BITMAP(name,bits) \
unsigned long name[BITS_TO_LONGS(bits)]
unsigned int __bitmap_weight(const unsigned long *bitmap, int bits);
void __bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits);
bool __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, unsigned int bits);
bool __bitmap_equal(const unsigned long *bitmap1,
const unsigned long *bitmap2, unsigned int bits);
void bitmap_clear(unsigned long *map, unsigned int start, int len);
bool __bitmap_intersects(const unsigned long *bitmap1,
const unsigned long *bitmap2, unsigned int bits);
#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))
static inline void bitmap_zero(unsigned long *dst, unsigned int nbits)
{
if (small_const_nbits(nbits))
*dst = 0UL;
else {
int len = BITS_TO_LONGS(nbits) * sizeof(unsigned long);
memset(dst, 0, len);
}
}
static inline void bitmap_fill(unsigned long *dst, unsigned int nbits)
{
unsigned int nlongs = BITS_TO_LONGS(nbits);
if (!small_const_nbits(nbits)) {
unsigned int len = (nlongs - 1) * sizeof(unsigned long);
memset(dst, 0xff, len);
}
dst[nlongs - 1] = BITMAP_LAST_WORD_MASK(nbits);
}
static inline bool bitmap_empty(const unsigned long *src, unsigned int nbits)
{
if (small_const_nbits(nbits))
return ! (*src & BITMAP_LAST_WORD_MASK(nbits));
return find_first_bit(src, nbits) == nbits;
}
static inline bool bitmap_full(const unsigned long *src, unsigned int nbits)
{
if (small_const_nbits(nbits))
return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
return find_first_zero_bit(src, nbits) == nbits;
}
static inline unsigned int bitmap_weight(const unsigned long *src, unsigned int nbits)
{
if (small_const_nbits(nbits))
return hweight_long(*src & BITMAP_LAST_WORD_MASK(nbits));
return __bitmap_weight(src, nbits);
}
static inline void bitmap_or(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, unsigned int nbits)
{
if (small_const_nbits(nbits))
*dst = *src1 | *src2;
else
__bitmap_or(dst, src1, src2, nbits);
}
/**
* bitmap_zalloc - Allocate bitmap
* @nbits: Number of bits
*/
static inline unsigned long *bitmap_zalloc(int nbits)
{
return calloc(1, BITS_TO_LONGS(nbits) * sizeof(unsigned long));
}
/*
* bitmap_free - Free bitmap
* @bitmap: pointer to bitmap
*/
static inline void bitmap_free(unsigned long *bitmap)
{
free(bitmap);
}
/*
* bitmap_scnprintf - print bitmap list into buffer
* @bitmap: bitmap
* @nbits: size of bitmap
* @buf: buffer to store output
* @size: size of @buf
*/
size_t bitmap_scnprintf(unsigned long *bitmap, unsigned int nbits,
char *buf, size_t size);
/**
* bitmap_and - Do logical and on bitmaps
* @dst: resulting bitmap
* @src1: operand 1
* @src2: operand 2
* @nbits: size of bitmap
*/
static inline bool bitmap_and(unsigned long *dst, const unsigned long *src1,
const unsigned long *src2, unsigned int nbits)
{
if (small_const_nbits(nbits))
return (*dst = *src1 & *src2 & BITMAP_LAST_WORD_MASK(nbits)) != 0;
return __bitmap_and(dst, src1, src2, nbits);
}
#ifdef __LITTLE_ENDIAN
#define BITMAP_MEM_ALIGNMENT 8
#else
#define BITMAP_MEM_ALIGNMENT (8 * sizeof(unsigned long))
#endif
#define BITMAP_MEM_MASK (BITMAP_MEM_ALIGNMENT - 1)
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
static inline bool bitmap_equal(const unsigned long *src1,
const unsigned long *src2, unsigned int nbits)
{
if (small_const_nbits(nbits))
return !((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits));
if (__builtin_constant_p(nbits & BITMAP_MEM_MASK) &&
IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT))
return !memcmp(src1, src2, nbits / 8);
return __bitmap_equal(src1, src2, nbits);
}
static inline bool bitmap_intersects(const unsigned long *src1,
const unsigned long *src2,
unsigned int nbits)
{
if (small_const_nbits(nbits))
return ((*src1 & *src2) & BITMAP_LAST_WORD_MASK(nbits)) != 0;
else
return __bitmap_intersects(src1, src2, nbits);
}
#endif /* _TOOLS_LINUX_BITMAP_H */