* Jan 23 2005 Matt Mackall <mpm@selenic.com>
*/
-#include <linux/kernel.h>
-#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/export.h>
#include <linux/sort.h>
#include <linux/slab.h>
* @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
*/
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);
+ for (i = n - size; i > 0; 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);
}
}
}