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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef __LINUX_BITMAP_H |
| 2 | #define __LINUX_BITMAP_H |
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| 3 | |||
| 4 | #ifndef __ASSEMBLY__ |
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| 5 | |||
| 6 | #include <linux/config.h> |
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| 7 | #include <linux/compiler.h> |
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| 8 | #include <linux/types.h> |
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| 9 | #include <linux/kernel.h> |
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| 10 | #include <linux/bitops.h> |
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| 11 | #include <linux/string.h> |
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| 12 | |||
| 13 | static inline int bitmap_empty(const unsigned long *bitmap, int bits) |
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| 14 | { |
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| 15 | int k, lim = bits/BITS_PER_LONG; |
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| 16 | for (k = 0; k < lim; ++k) |
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| 17 | if (bitmap[k]) |
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| 18 | return 0; |
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| 19 | |||
| 20 | if (bits % BITS_PER_LONG) |
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| 21 | if (bitmap[k] & ((1UL << (bits % BITS_PER_LONG)) - 1)) |
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| 22 | return 0; |
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| 23 | |||
| 24 | return 1; |
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| 25 | } |
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| 26 | |||
| 27 | static inline int bitmap_full(const unsigned long *bitmap, int bits) |
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| 28 | { |
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| 29 | int k, lim = bits/BITS_PER_LONG; |
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| 30 | for (k = 0; k < lim; ++k) |
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| 31 | if (~bitmap[k]) |
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| 32 | return 0; |
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| 33 | |||
| 34 | if (bits % BITS_PER_LONG) |
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| 35 | if (~bitmap[k] & ((1UL << (bits % BITS_PER_LONG)) - 1)) |
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| 36 | return 0; |
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| 37 | |||
| 38 | return 1; |
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| 39 | } |
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| 40 | |||
| 41 | static inline int bitmap_equal(const unsigned long *bitmap1, |
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| 42 | unsigned long *bitmap2, int bits) |
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| 43 | { |
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| 44 | int k, lim = bits/BITS_PER_LONG;; |
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| 45 | for (k = 0; k < lim; ++k) |
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| 46 | if (bitmap1[k] != bitmap2[k]) |
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| 47 | return 0; |
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| 48 | |||
| 49 | if (bits % BITS_PER_LONG) |
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| 50 | if ((bitmap1[k] ^ bitmap2[k]) & |
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| 51 | ((1UL << (bits % BITS_PER_LONG)) - 1)) |
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| 52 | return 0; |
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| 53 | |||
| 54 | return 1; |
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| 55 | } |
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| 56 | |||
| 57 | static inline void bitmap_complement(unsigned long *bitmap, int bits) |
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| 58 | { |
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| 59 | int k; |
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| 60 | |||
| 61 | for (k = 0; k < BITS_TO_LONGS(bits); ++k) |
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| 62 | bitmap[k] = ~bitmap[k]; |
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| 63 | } |
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| 64 | |||
| 65 | static inline void bitmap_clear(unsigned long *bitmap, int bits) |
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| 66 | { |
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| 67 | CLEAR_BITMAP((unsigned long *)bitmap, bits); |
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| 68 | } |
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| 69 | |||
| 70 | static inline void bitmap_fill(unsigned long *bitmap, int bits) |
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| 71 | { |
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| 72 | memset(bitmap, 0xff, BITS_TO_LONGS(bits)*sizeof(unsigned long)); |
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| 73 | } |
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| 74 | |||
| 75 | static inline void bitmap_copy(unsigned long *dst, |
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| 76 | const unsigned long *src, int bits) |
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| 77 | { |
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| 78 | memcpy(dst, src, BITS_TO_LONGS(bits)*sizeof(unsigned long)); |
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| 79 | } |
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| 80 | |||
| 81 | static inline void bitmap_shift_right(unsigned long *dst, |
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| 82 | const unsigned long *src, int shift, int bits) |
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| 83 | { |
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| 84 | int k; |
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| 85 | DECLARE_BITMAP(__shr_tmp, bits); |
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| 86 | |||
| 87 | bitmap_clear(__shr_tmp, bits); |
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| 88 | for (k = 0; k < bits - shift; ++k) |
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| 89 | if (test_bit(k + shift, src)) |
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| 90 | set_bit(k, __shr_tmp); |
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| 91 | bitmap_copy(dst, __shr_tmp, bits); |
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| 92 | } |
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| 93 | |||
| 94 | static inline void bitmap_shift_left(unsigned long *dst, |
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| 95 | const unsigned long *src, int shift, int bits) |
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| 96 | { |
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| 97 | int k; |
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| 98 | DECLARE_BITMAP(__shl_tmp, bits); |
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| 99 | |||
| 100 | bitmap_clear(__shl_tmp, bits); |
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| 101 | for (k = bits; k >= shift; --k) |
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| 102 | if (test_bit(k - shift, src)) |
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| 103 | set_bit(k, __shl_tmp); |
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| 104 | bitmap_copy(dst, __shl_tmp, bits); |
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| 105 | } |
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| 106 | |||
| 107 | static inline void bitmap_and(unsigned long *dst, const unsigned long *bitmap1, |
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| 108 | const unsigned long *bitmap2, int bits) |
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| 109 | { |
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| 110 | int k; |
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| 111 | int nr = BITS_TO_LONGS(bits); |
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| 112 | |||
| 113 | for (k = 0; k < nr; k++) |
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| 114 | dst[k] = bitmap1[k] & bitmap2[k]; |
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| 115 | } |
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| 116 | |||
| 117 | static inline void bitmap_or(unsigned long *dst, const unsigned long *bitmap1, |
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| 118 | const unsigned long *bitmap2, int bits) |
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| 119 | { |
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| 120 | int k; |
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| 121 | int nr = BITS_TO_LONGS(bits); |
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| 122 | |||
| 123 | for (k = 0; k < nr; k++) |
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| 124 | dst[k] = bitmap1[k] | bitmap2[k]; |
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| 125 | } |
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| 126 | |||
| 127 | #if BITS_PER_LONG == 32 |
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| 128 | static inline int bitmap_weight(const unsigned long *bitmap, int bits) |
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| 129 | { |
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| 130 | int k, w = 0, lim = bits/BITS_PER_LONG; |
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| 131 | |||
| 132 | for (k = 0; k < lim; k++) |
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| 133 | w += hweight32(bitmap[k]); |
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| 134 | |||
| 135 | if (bits % BITS_PER_LONG) |
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| 136 | w += hweight32(bitmap[k] & |
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| 137 | ((1UL << (bits % BITS_PER_LONG)) - 1)); |
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| 138 | |||
| 139 | return w; |
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| 140 | } |
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| 141 | #else |
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| 142 | static inline int bitmap_weight(const unsigned long *bitmap, int bits) |
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| 143 | { |
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| 144 | int k, w = 0, lim = bits/BITS_PER_LONG; |
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| 145 | |||
| 146 | for (k = 0; k < lim; k++) |
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| 147 | w += hweight64(bitmap[k]); |
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| 148 | |||
| 149 | if (bits % BITS_PER_LONG) |
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| 150 | w += hweight64(bitmap[k] & |
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| 151 | ((1UL << (bits % BITS_PER_LONG)) - 1)); |
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| 152 | |||
| 153 | return w; |
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| 154 | } |
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| 155 | #endif |
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| 156 | |||
| 157 | #endif /* __ASSEMBLY__ */ |
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| 158 | |||
| 159 | #endif /* __LINUX_BITMAP_H */ |