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stdlib/FreeBSD/qsort.c Libc-825.26 Libc-320
--- Libc/Libc-825.26/stdlib/FreeBSD/qsort.c
+++ Libc/Libc-320/stdlib/FreeBSD/qsort.c
@@ -10,6 +10,10 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
@@ -31,22 +35,17 @@
 static char sccsid[] = "@(#)qsort.c	8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdlib/qsort.c,v 1.15 2008/01/14 09:21:34 das Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/stdlib/qsort.c,v 1.12 2002/09/10 02:04:49 wollman Exp $");
 
 #include <stdlib.h>
-#include <string.h>
 
 #ifdef I_AM_QSORT_R
 typedef int		 cmp_t(void *, const void *, const void *);
 #else
 typedef int		 cmp_t(const void *, const void *);
 #endif
-#ifdef I_AM_QSORT_B
-static inline char	*med3(char *, char *, char *, cmp_t ^, void *) __attribute__((always_inline));
-#else
-static inline char	*med3(char *, char *, char *, cmp_t *, void *) __attribute__((always_inline));
-#endif
-static inline void	 swapfunc(char *, char *, int, int) __attribute__((always_inline));
+static inline char	*med3(char *, char *, char *, cmp_t *, void *);
+static inline void	 swapfunc(char *, char *, int, int);
 
 #define min(a, b)	(a) < (b) ? a : b
 
@@ -95,13 +94,7 @@
 #endif
 
 static inline char *
-med3(char *a, char *b, char *c,
-#ifdef I_AM_QSORT_B
-cmp_t ^cmp,
-#else
-cmp_t *cmp,
-#endif
-void *thunk
+med3(char *a, char *b, char *c, cmp_t *cmp, void *thunk
 #ifndef I_AM_QSORT_R
 __unused
 #endif
@@ -112,47 +105,19 @@
               :(CMP(thunk, b, c) > 0 ? b : (CMP(thunk, a, c) < 0 ? a : c ));
 }
 
-#ifdef __LP64__
-#define DEPTH(x)	(2 * (flsl((long)(x)) - 1))
-#else /* !__LP64__ */
-#define DEPTH(x)	(2 * (fls((int)(x)) - 1))
-#endif /* __LP64__ */
-
 #ifdef I_AM_QSORT_R
-int __heapsort_r(void *, size_t, size_t, void *, int (*)(void *, const void *, const void *));
+void
+qsort_r(void *a, size_t n, size_t es, void *thunk, cmp_t *cmp)
+#else
+#define thunk NULL
+void
+qsort(void *a, size_t n, size_t es, cmp_t *cmp)
 #endif
-
-static void
-_qsort(void *a, size_t n, size_t es,
-#ifdef I_AM_QSORT_R
-void *thunk,
-#else
-#define thunk	NULL
-#endif
-#ifdef I_AM_QSORT_B
-cmp_t ^cmp,
-#else
-cmp_t *cmp,
-#endif
-int depth_limit)
 {
 	char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
-	size_t d, r;
-	int cmp_result;
-	int swaptype, swap_cnt;
+	int d, r, swaptype, swap_cnt;
 
-loop:
-	if (depth_limit-- <= 0) {
-#ifdef I_AM_QSORT_B
-		heapsort_b(a, n, es, cmp);
-#elif defined(I_AM_QSORT_R)
-		__heapsort_r(a, n, es, thunk, cmp);
-#else
-		heapsort(a, n, es, cmp);
-#endif
-		return;
-	}
-	SWAPINIT(a, es);
+loop:	SWAPINIT(a, es);
 	swap_cnt = 0;
 	if (n < 7) {
 		for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
@@ -179,16 +144,16 @@
 
 	pc = pd = (char *)a + (n - 1) * es;
 	for (;;) {
-		while (pb <= pc && (cmp_result = CMP(thunk, pb, a)) <= 0) {
-			if (cmp_result == 0) {
+		while (pb <= pc && (r = CMP(thunk, pb, a)) <= 0) {
+			if (r == 0) {
 				swap_cnt = 1;
 				swap(pa, pb);
 				pa += es;
 			}
 			pb += es;
 		}
-		while (pb <= pc && (cmp_result = CMP(thunk, pc, a)) >= 0) {
-			if (cmp_result == 0) {
+		while (pb <= pc && (r = CMP(thunk, pc, a)) >= 0) {
+			if (r == 0) {
 				swap_cnt = 1;
 				swap(pc, pd);
 				pd -= es;
@@ -202,31 +167,25 @@
 		pb += es;
 		pc -= es;
 	}
+	if (swap_cnt == 0) {  /* Switch to insertion sort */
+		for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
+			for (pl = pm; 
+			     pl > (char *)a && CMP(thunk, pl - es, pl) > 0;
+			     pl -= es)
+				swap(pl, pl - es);
+		return;
+	}
 
 	pn = (char *)a + n * es;
 	r = min(pa - (char *)a, pb - pa);
 	vecswap(a, pb - r, r);
 	r = min(pd - pc, pn - pd - es);
 	vecswap(pb, pn - r, r);
-
-	if (swap_cnt == 0) {  /* Switch to insertion sort */
-		r = 1 + n / 4; /* n >= 7, so r >= 2 */
-		for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es)
-			for (pl = pm; 
-			     pl > (char *)a && CMP(thunk, pl - es, pl) > 0;
-			     pl -= es) {
-				swap(pl, pl - es);
-				if (++swap_cnt > r) goto nevermind;
-			}
-		return;
-	}
-
-nevermind:
 	if ((r = pb - pa) > es)
 #ifdef I_AM_QSORT_R
-		_qsort(a, r / es, es, thunk, cmp, depth_limit);
+		qsort_r(a, r / es, es, thunk, cmp);
 #else
-		_qsort(a, r / es, es, cmp, depth_limit);
+		qsort(a, r / es, es, cmp);
 #endif
 	if ((r = pd - pc) > es) {
 		/* Iterate rather than recurse to save stack space */
@@ -236,19 +195,3 @@
 	}
 /*		qsort(pn - r, r / es, es, cmp);*/
 }
-
-void
-#ifdef I_AM_QSORT_R
-qsort_r(void *a, size_t n, size_t es, void *thunk, cmp_t *cmp)
-#elif defined(I_AM_QSORT_B)
-qsort_b(void *a, size_t n, size_t es, cmp_t ^cmp)
-#else
-qsort(void *a, size_t n, size_t es, cmp_t *cmp)
-#endif
-{
-	_qsort(a, n, es,
-#ifdef I_AM_QSORT_R
-		thunk,
-#endif
-		cmp, DEPTH(n));
-}