Add musl's old heap sort

1 files changed, 0 insertions, 218 deletions

diff --git a/musl_qsort.c b/musl_qsort.c
deleted file mode 100644
index 3792aa1..0000000
--- a/musl_qsort.c
+++ /dev/null
@@ -1,218 +0,0 @@
-/* Copyright (C) 2011 by Valentin Ochs
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to
- * deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- * sell copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
- * IN THE SOFTWARE.
- */
-
-/* Minor changes by Rich Felker for integration in musl, 2011-04-27. */
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "sorters.h"
-
-static inline int ntz(uint64_t x)
-{
-	__asm__( "bsf %1,%0" : "=r"(x) : "r"(x) );
-	return x;
-}
-
-static inline int pntz(size_t p[2]) {
-	int r = ntz(p[0] - 1);
-	if(r != 0 || (r = 8*sizeof(size_t) + ntz(p[1])) != 8*sizeof(size_t)) {
-		return r;
-	}
-	return 0;
-}
-
-static void cycle(size_t width, unsigned char* ar[], int n)
-{
-	unsigned char tmp[256];
-	size_t l;
-	int i;
-
-	if(n < 2) {
-		return;
-	}
-
-	ar[n] = tmp;
-	while(width) {
-		l = sizeof(tmp) < width ? sizeof(tmp) : width;
-		memcpy(ar[n], ar[0], l);
-		for(i = 0; i < n; i++) {
-			memcpy(ar[i], ar[i + 1], l);
-			ar[i] += l;
-		}
-		width -= l;
-	}
-}
-
-/* shl() and shr() need n > 0 */
-static inline void shl(size_t p[2], int n)
-{
-	if(n >= 8 * sizeof(size_t)) {
-		n -= 8 * sizeof(size_t);
-		p[1] = p[0];
-		p[0] = 0;
-	}
-	p[1] <<= n;
-	p[1] |= p[0] >> (sizeof(size_t) * 8 - n);
-	p[0] <<= n;
-}
-
-static inline void shr(size_t p[2], int n)
-{
-	if(n >= 8 * sizeof(size_t)) {
-		n -= 8 * sizeof(size_t);
-		p[0] = p[1];
-		p[1] = 0;
-	}
-	p[0] >>= n;
-	p[0] |= p[1] << (sizeof(size_t) * 8 - n);
-	p[1] >>= n;
-}
-
-static void sift(unsigned char *head, size_t width, cmpfun cmp, int pshift, size_t lp[])
-{
-	unsigned char *rt, *lf;
-	unsigned char *ar[14 * sizeof(size_t) + 1];
-	int i = 1;
-
-	ar[0] = head;
-	while(pshift > 1) {
-		rt = head - width;
-		lf = head - width - lp[pshift - 2];
-
-		if((*cmp)(ar[0], lf) >= 0 && (*cmp)(ar[0], rt) >= 0) {
-			break;
-		}
-		if((*cmp)(lf, rt) >= 0) {
-			ar[i++] = lf;
-			head = lf;
-			pshift -= 1;
-		} else {
-			ar[i++] = rt;
-			head = rt;
-			pshift -= 2;
-		}
-	}
-	cycle(width, ar, i);
-}
-
-static void trinkle(unsigned char *head, size_t width, cmpfun cmp, size_t pp[2], int pshift, int trusty, size_t lp[])
-{
-	unsigned char *stepson,
-	              *rt, *lf;
-	size_t p[2];
-	unsigned char *ar[14 * sizeof(size_t) + 1];
-	int i = 1;
-	int trail;
-
-	p[0] = pp[0];
-	p[1] = pp[1];
-
-	ar[0] = head;
-	while(p[0] != 1 || p[1] != 0) {
-		stepson = head - lp[pshift];
-		if((*cmp)(stepson, ar[0]) <= 0) {
-			break;
-		}
-		if(!trusty && pshift > 1) {
-			rt = head - width;
-			lf = head - width - lp[pshift - 2];
-			if((*cmp)(rt, stepson) >= 0 || (*cmp)(lf, stepson) >= 0) {
-				break;
-			}
-		}
-
-		ar[i++] = stepson;
-		head = stepson;
-		trail = pntz(p);
-		shr(p, trail);
-		pshift += trail;
-		trusty = 0;
-	}
-	if(!trusty) {
-		cycle(width, ar, i);
-		sift(head, width, cmp, pshift, lp);
-	}
-}
-
-void musl_qsort(void *base, size_t nel, size_t width, cmpfun cmp)
-{
-	size_t lp[12*sizeof(size_t)];
-	size_t i, size = width * nel;
-	unsigned char *head, *high;
-	size_t p[2] = {1, 0};
-	int pshift = 1;
-	int trail;
-
-	if (!size) return;
-
-	head = base;
-	high = head + size - width;
-
-	/* Precompute Leonardo numbers, scaled by element width */
-	for(lp[0]=lp[1]=width, i=2; (lp[i]=lp[i-2]+lp[i-1]+width) < size; i++);
-
-	while(head < high) {
-		if((p[0] & 3) == 3) {
-			sift(head, width, cmp, pshift, lp);
-			shr(p, 2);
-			pshift += 2;
-		} else {
-			if(lp[pshift - 1] >= high - head) {
-				trinkle(head, width, cmp, p, pshift, 0, lp);
-			} else {
-				sift(head, width, cmp, pshift, lp);
-			}
-
-			if(pshift == 1) {
-				shl(p, 1);
-				pshift = 0;
-			} else {
-				shl(p, pshift - 1);
-				pshift = 1;
-			}
-		}
-
-		p[0] |= 1;
-		head += width;
-	}
-
-	trinkle(head, width, cmp, p, pshift, 0, lp);
-
-	while(pshift != 1 || p[0] != 1 || p[1] != 0) {
-		if(pshift <= 1) {
-			trail = pntz(p);
-			shr(p, trail);
-			pshift += trail;
-		} else {
-			shl(p, 2);
-			pshift -= 2;
-			p[0] ^= 7;
-			shr(p, 1);
-			trinkle(head - lp[pshift] - width, width, cmp, p, pshift + 1, 1, lp);
-			shl(p, 1);
-			p[0] |= 1;
-			trinkle(head - width, width, cmp, p, pshift, 1, lp);
-		}
-		head -= width;
-	}
-}