diff options
| -rw-r--r-- | lib/sort.c | 30 |
1 files changed, 16 insertions, 14 deletions
@@ -32,11 +32,11 @@ static void generic_swap(void *a, void *b, int size) * @base: pointer to data to sort * @num: number of elements * @size: size of each element - * @cmp: pointer to comparison function - * @swap: pointer to swap function or NULL + * @cmp_func: pointer to comparison function + * @swap_func: pointer to swap function or NULL * * This function does a heapsort on the given array. You may provide a - * swap function optimized to your element type. + * swap_func function optimized to your element type. * * Sorting time is O(n log n) both on average and worst-case. While * qsort is about 20% faster on average, it suffers from exploitable @@ -45,37 +45,39 @@ static void generic_swap(void *a, void *b, int size) */ void sort(void *base, size_t num, size_t size, - int (*cmp)(const void *, const void *), - void (*swap)(void *, void *, int size)) + int (*cmp_func)(const void *, const void *), + void (*swap_func)(void *, void *, int size)) { /* pre-scale counters for performance */ int i = (num/2 - 1) * size, n = num * size, c, r; - if (!swap) - swap = (size == 4 ? u32_swap : generic_swap); + if (!swap_func) + swap_func = (size == 4 ? u32_swap : generic_swap); /* heapify */ for ( ; i >= 0; i -= size) { for (r = i; r * 2 + size < n; r = c) { c = r * 2 + size; - if (c < n - size && cmp(base + c, base + c + size) < 0) + if (c < n - size && + cmp_func(base + c, base + c + size) < 0) c += size; - if (cmp(base + r, base + c) >= 0) + if (cmp_func(base + r, base + c) >= 0) break; - swap(base + r, base + c, size); + swap_func(base + r, base + c, size); } } /* sort */ for (i = n - size; i > 0; i -= size) { - swap(base, base + i, size); + swap_func(base, base + i, size); for (r = 0; r * 2 + size < i; r = c) { c = r * 2 + size; - if (c < i - size && cmp(base + c, base + c + size) < 0) + if (c < i - size && + cmp_func(base + c, base + c + size) < 0) c += size; - if (cmp(base + r, base + c) >= 0) + if (cmp_func(base + r, base + c) >= 0) break; - swap(base + r, base + c, size); + swap_func(base + r, base + c, size); } } } |
