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Line 27... | Line 27... | ||
27 | */ |
27 | */ |
28 | 28 | ||
29 | #include <mm/heap.h> |
29 | #include <mm/heap.h> |
30 | #include <memstr.h> |
30 | #include <memstr.h> |
31 | #include <sort.h> |
31 | #include <sort.h> |
- | 32 | #include <panic.h> |
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32 | 33 | ||
- | 34 | static void _qsort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b), void * pivot, void * tmp); |
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33 | 35 | ||
- | 36 | /* |
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- | 37 | * Wrapper method for quicksort algorithm to decrease amount of allocations |
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- | 38 | */ |
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34 | void qsort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) { |
39 | void qsort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) { |
35 | if (n > 4) { |
- | |
36 | int i = 0, j = n - 1; |
- | |
37 | void * tmp = (void *) malloc(e_size); |
40 | void * tmp = (void *) malloc(e_size); |
38 | void * pivot = (void *) malloc(e_size); |
41 | void * pivot = (void *) malloc(e_size); |
39 | 42 | ||
40 | memcpy(pivot, data, e_size); |
- | |
41 | - | ||
42 | while (1) { |
- | |
43 | while ((cmp(data + i * e_size, pivot) < 0) && i < n) i++; |
- | |
44 | while ((cmp(data + j * e_size, pivot) >=0) && j > 0) j--; |
- | |
45 | if (i<j) { |
43 | if (!tmp || !pivot) { |
46 | memcpy(tmp, data + i * e_size, e_size); |
44 | panic("qsort(): Cannot allocate memory\n"); |
47 | memcpy(data + i * e_size, data + j * e_size, e_size); |
- | |
48 | memcpy(data + j * e_size, tmp, e_size); |
- | |
49 | } else { |
- | |
50 | break; |
- | |
51 | } |
- | |
52 | } |
45 | } |
53 | 46 | ||
- | 47 | _qsort(data, n, e_size, cmp, pivot, tmp); |
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- | 48 | ||
54 | free(tmp); |
49 | free(tmp); |
55 | free(pivot); |
50 | free(pivot); |
56 | - | ||
57 | qsort(data, j + 1, e_size, cmp); |
- | |
58 | qsort(data + (j + 1) * e_size, n - j - 1, e_size, cmp); |
- | |
59 | } else { |
- | |
60 | bubblesort(data, n, e_size, cmp); |
- | |
61 | } |
- | |
62 | } |
51 | } |
63 | 52 | ||
64 | 53 | ||
65 | void bubblesort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) { |
54 | void bubblesort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b)) { |
66 | bool done = false; |
55 | bool done = false; |
Line 80... | Line 69... | ||
80 | } |
69 | } |
81 | 70 | ||
82 | free(slot); |
71 | free(slot); |
83 | } |
72 | } |
84 | 73 | ||
- | 74 | static void _qsort(void * data, count_t n, size_t e_size, int (* cmp) (void * a, void * b), void * pivot, void * tmp) { |
|
- | 75 | if (n > 4) { |
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- | 76 | int i = 0, j = n - 1; |
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- | 77 | ||
- | 78 | memcpy(pivot, data, e_size); |
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- | 79 | ||
- | 80 | while (1) { |
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- | 81 | while ((cmp(data + i * e_size, pivot) < 0) && i < n) i++; |
|
- | 82 | while ((cmp(data + j * e_size, pivot) >=0) && j > 0) j--; |
|
- | 83 | if (i<j) { |
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- | 84 | memcpy(tmp, data + i * e_size, e_size); |
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- | 85 | memcpy(data + i * e_size, data + j * e_size, e_size); |
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- | 86 | memcpy(data + j * e_size, tmp, e_size); |
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- | 87 | } else { |
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- | 88 | break; |
|
- | 89 | } |
|
- | 90 | } |
|
- | 91 | ||
- | 92 | qsort(data, j + 1, e_size, cmp); |
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- | 93 | qsort(data + (j + 1) * e_size, n - j - 1, e_size, cmp); |
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- | 94 | } else { |
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- | 95 | bubblesort(data, n, e_size, cmp); |
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- | 96 | } |
|
- | 97 | } |
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- | 98 | ||
- | 99 | ||
- | 100 | ||
85 | /* |
101 | /* |
86 | * Comparator returns 1 if a > b, 0 if a == b, -1 if a < b |
102 | * Comparator returns 1 if a > b, 0 if a == b, -1 if a < b |
87 | */ |
103 | */ |
88 | int int_cmp(void * a, void * b) { |
104 | int int_cmp(void * a, void * b) { |
89 | return (* (int *) a > * (int*)b) ? 1 : (*(int *)a < * (int *)b) ? -1 : 0; |
105 | return (* (int *) a > * (int*)b) ? 1 : (*(int *)a < * (int *)b) ? -1 : 0; |