From ec4767bf21452559c56e862cf59ad1206234523b Mon Sep 17 00:00:00 2001 From: "alecf%netscape.com" Date: Tue, 13 Apr 1999 19:03:45 +0000 Subject: [PATCH] add quicksort implementation to base (Thanks to Regents of CA and the RDF team) --- base/public/Makefile.in | 1 + base/public/nsQuickSort.h | 42 +++++++++ base/src/Makefile.in | 1 + base/src/nsQuickSort.cpp | 181 +++++++++++++++++++++++++++++++++++++ xpcom/ds/nsQuickSort.cpp | 181 +++++++++++++++++++++++++++++++++++++ xpcom/ds/nsQuickSort.h | 42 +++++++++ xpcom/glue/nsQuickSort.cpp | 181 +++++++++++++++++++++++++++++++++++++ xpcom/glue/nsQuickSort.h | 42 +++++++++ 8 files changed, 671 insertions(+) create mode 100644 base/public/nsQuickSort.h create mode 100644 base/src/nsQuickSort.cpp create mode 100644 xpcom/ds/nsQuickSort.cpp create mode 100644 xpcom/ds/nsQuickSort.h create mode 100644 xpcom/glue/nsQuickSort.cpp create mode 100644 xpcom/glue/nsQuickSort.h diff --git a/base/public/Makefile.in b/base/public/Makefile.in index 588e6ba8853..191d4031539 100644 --- a/base/public/Makefile.in +++ b/base/public/Makefile.in @@ -39,6 +39,7 @@ EXPORTS = \ nsIObserverService.h \ nsIObserverList.h \ nsIObserver.h \ + nsQuickSort.h \ $(NULL) EXPORTS := $(addprefix $(srcdir)/, $(EXPORTS)) diff --git a/base/public/nsQuickSort.h b/base/public/nsQuickSort.h new file mode 100644 index 00000000000..6fa043e8bfd --- /dev/null +++ b/base/public/nsQuickSort.h @@ -0,0 +1,42 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * + * The contents of this file are subject to the Netscape Public License + * Version 1.0 (the "NPL"); you may not use this file except in + * compliance with the NPL. You may obtain a copy of the NPL at + * http://www.mozilla.org/NPL/ + * + * Software distributed under the NPL is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL + * for the specific language governing rights and limitations under the + * NPL. + * + * The Initial Developer of this code under the NPL is Netscape + * Communications Corporation. Portions created by Netscape are + * Copyright (C) 1998 Netscape Communications Corporation. All Rights + * Reserved. + */ + + +/* We need this because Solaris' version of qsort is broken and + * causes array bounds reads. + */ + +#ifndef nsQuickSort_h___ +#define nsQuickSort_h___ + +/* Had to pull the following define out of xp_core.h + * to avoid including xp_core.h. + * That brought in too many header file dependencies. + */ +#if defined(__cplusplus) +extern "C" { +#endif + +extern void nsQuickSort(void *, size_t, size_t, + int (*)(const void *, const void *, void *), void *); + +#if defined(__cplusplus) +} +#endif + +#endif /* nsQuickSort_h___ */ diff --git a/base/src/Makefile.in b/base/src/Makefile.in index cdb258f13a6..be8b6b27f59 100644 --- a/base/src/Makefile.in +++ b/base/src/Makefile.in @@ -56,6 +56,7 @@ CPPSRCS = \ nsObserverService.cpp \ nsObserverList.cpp \ nsObserver.cpp \ + nsQuickSort.cpp \ $(NULL) EXPORTS = \ diff --git a/base/src/nsQuickSort.cpp b/base/src/nsQuickSort.cpp new file mode 100644 index 00000000000..dd292d812d5 --- /dev/null +++ b/base/src/nsQuickSort.cpp @@ -0,0 +1,181 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* We need this because Solaris' version of qsort is broken and + * causes array bounds reads. + */ + +#include +#include "prtypes.h" + +#if !defined(DEBUG) && (defined(__cplusplus) || defined(__gcc)) +# ifndef INLINE +# define INLINE inline +# endif +#else +# define INLINE +#endif + +typedef int cmp_t(const void *, const void *, void *); +static INLINE char *med3(char *, char *, char *, cmp_t *, void *); +static INLINE void swapfunc(char *, char *, int, int); + +/* + * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". + */ +#define swapcode(TYPE, parmi, parmj, n) { \ + long i = (n) / sizeof (TYPE); \ + register TYPE *pi = (TYPE *) (parmi); \ + register TYPE *pj = (TYPE *) (parmj); \ + do { \ + register TYPE t = *pi; \ + *pi++ = *pj; \ + *pj++ = t; \ + } while (--i > 0); \ +} + +#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ + es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; + +static INLINE void +swapfunc(char *a, char *b, int n, int swaptype) +{ + if(swaptype <= 1) + swapcode(long, a, b, n) + else + swapcode(char, a, b, n) +} + +#define swap(a, b) \ + if (swaptype == 0) { \ + long t = *(long *)(a); \ + *(long *)(a) = *(long *)(b); \ + *(long *)(b) = t; \ + } else \ + swapfunc(a, b, es, swaptype) + +#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) + +static INLINE char * +med3(char *a, char *b, char *c, cmp_t* cmp, void *data) +{ + return cmp(a, b, data) < 0 ? + (cmp(b, c, data) < 0 ? b : (cmp(a, c, data) < 0 ? c : a )) + :(cmp(b, c, data) > 0 ? b : (cmp(a, c, data) < 0 ? a : c )); +} + +void nsQuickSort ( + void *a, + unsigned n, + unsigned es, + cmp_t *cmp, + void *data + ) +{ + char *pa, *pb, *pc, *pd, *pl, *pm, *pn; + int d, r, swaptype, swap_cnt; + +loop: SWAPINIT(a, es); + swap_cnt = 0; + if (n < 7) { + for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es) + for (pl = pm; pl > (char *)a && cmp(pl - es, pl, data) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + pm = (char *)a + (n / 2) * es; + if (n > 7) { + pl = (char *)a; + pn = (char *)a + (n - 1) * es; + if (n > 40) { + d = (n / 8) * es; + pl = med3(pl, pl + d, pl + 2 * d, cmp, data); + pm = med3(pm - d, pm, pm + d, cmp, data); + pn = med3(pn - 2 * d, pn - d, pn, cmp, data); + } + pm = med3(pl, pm, pn, cmp, data); + } + swap(a, pm); + pa = pb = (char *)a + es; + + pc = pd = (char *)a + (n - 1) * es; + for (;;) { + while (pb <= pc && (r = cmp(pb, a, data)) <= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pa, pb); + pa += es; + } + pb += es; + } + while (pb <= pc && (r = cmp(pc, a, data)) >= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pc, pd); + pd -= es; + } + pc -= es; + } + if (pb > pc) + break; + swap(pb, pc); + swap_cnt = 1; + 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(pl - es, pl, data) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + + pn = (char *)a + n * es; + r = PR_MIN(pa - (char *)a, pb - pa); + vecswap(a, pb - r, r); + r = PR_MIN(pd - pc, pn - pd - es); + vecswap(pb, pn - r, r); + if ((r = pb - pa) > es) + nsQuickSort(a, r / es, es, cmp, data); + if ((r = pd - pc) > es) { + /* Iterate rather than recurse to save stack space */ + a = pn - r; + n = r / es; + goto loop; + } +/* nsQuickSort(pn - r, r / es, es, cmp, data);*/ +} diff --git a/xpcom/ds/nsQuickSort.cpp b/xpcom/ds/nsQuickSort.cpp new file mode 100644 index 00000000000..dd292d812d5 --- /dev/null +++ b/xpcom/ds/nsQuickSort.cpp @@ -0,0 +1,181 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* We need this because Solaris' version of qsort is broken and + * causes array bounds reads. + */ + +#include +#include "prtypes.h" + +#if !defined(DEBUG) && (defined(__cplusplus) || defined(__gcc)) +# ifndef INLINE +# define INLINE inline +# endif +#else +# define INLINE +#endif + +typedef int cmp_t(const void *, const void *, void *); +static INLINE char *med3(char *, char *, char *, cmp_t *, void *); +static INLINE void swapfunc(char *, char *, int, int); + +/* + * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". + */ +#define swapcode(TYPE, parmi, parmj, n) { \ + long i = (n) / sizeof (TYPE); \ + register TYPE *pi = (TYPE *) (parmi); \ + register TYPE *pj = (TYPE *) (parmj); \ + do { \ + register TYPE t = *pi; \ + *pi++ = *pj; \ + *pj++ = t; \ + } while (--i > 0); \ +} + +#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ + es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; + +static INLINE void +swapfunc(char *a, char *b, int n, int swaptype) +{ + if(swaptype <= 1) + swapcode(long, a, b, n) + else + swapcode(char, a, b, n) +} + +#define swap(a, b) \ + if (swaptype == 0) { \ + long t = *(long *)(a); \ + *(long *)(a) = *(long *)(b); \ + *(long *)(b) = t; \ + } else \ + swapfunc(a, b, es, swaptype) + +#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) + +static INLINE char * +med3(char *a, char *b, char *c, cmp_t* cmp, void *data) +{ + return cmp(a, b, data) < 0 ? + (cmp(b, c, data) < 0 ? b : (cmp(a, c, data) < 0 ? c : a )) + :(cmp(b, c, data) > 0 ? b : (cmp(a, c, data) < 0 ? a : c )); +} + +void nsQuickSort ( + void *a, + unsigned n, + unsigned es, + cmp_t *cmp, + void *data + ) +{ + char *pa, *pb, *pc, *pd, *pl, *pm, *pn; + int d, r, swaptype, swap_cnt; + +loop: SWAPINIT(a, es); + swap_cnt = 0; + if (n < 7) { + for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es) + for (pl = pm; pl > (char *)a && cmp(pl - es, pl, data) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + pm = (char *)a + (n / 2) * es; + if (n > 7) { + pl = (char *)a; + pn = (char *)a + (n - 1) * es; + if (n > 40) { + d = (n / 8) * es; + pl = med3(pl, pl + d, pl + 2 * d, cmp, data); + pm = med3(pm - d, pm, pm + d, cmp, data); + pn = med3(pn - 2 * d, pn - d, pn, cmp, data); + } + pm = med3(pl, pm, pn, cmp, data); + } + swap(a, pm); + pa = pb = (char *)a + es; + + pc = pd = (char *)a + (n - 1) * es; + for (;;) { + while (pb <= pc && (r = cmp(pb, a, data)) <= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pa, pb); + pa += es; + } + pb += es; + } + while (pb <= pc && (r = cmp(pc, a, data)) >= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pc, pd); + pd -= es; + } + pc -= es; + } + if (pb > pc) + break; + swap(pb, pc); + swap_cnt = 1; + 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(pl - es, pl, data) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + + pn = (char *)a + n * es; + r = PR_MIN(pa - (char *)a, pb - pa); + vecswap(a, pb - r, r); + r = PR_MIN(pd - pc, pn - pd - es); + vecswap(pb, pn - r, r); + if ((r = pb - pa) > es) + nsQuickSort(a, r / es, es, cmp, data); + if ((r = pd - pc) > es) { + /* Iterate rather than recurse to save stack space */ + a = pn - r; + n = r / es; + goto loop; + } +/* nsQuickSort(pn - r, r / es, es, cmp, data);*/ +} diff --git a/xpcom/ds/nsQuickSort.h b/xpcom/ds/nsQuickSort.h new file mode 100644 index 00000000000..6fa043e8bfd --- /dev/null +++ b/xpcom/ds/nsQuickSort.h @@ -0,0 +1,42 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * + * The contents of this file are subject to the Netscape Public License + * Version 1.0 (the "NPL"); you may not use this file except in + * compliance with the NPL. You may obtain a copy of the NPL at + * http://www.mozilla.org/NPL/ + * + * Software distributed under the NPL is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL + * for the specific language governing rights and limitations under the + * NPL. + * + * The Initial Developer of this code under the NPL is Netscape + * Communications Corporation. Portions created by Netscape are + * Copyright (C) 1998 Netscape Communications Corporation. All Rights + * Reserved. + */ + + +/* We need this because Solaris' version of qsort is broken and + * causes array bounds reads. + */ + +#ifndef nsQuickSort_h___ +#define nsQuickSort_h___ + +/* Had to pull the following define out of xp_core.h + * to avoid including xp_core.h. + * That brought in too many header file dependencies. + */ +#if defined(__cplusplus) +extern "C" { +#endif + +extern void nsQuickSort(void *, size_t, size_t, + int (*)(const void *, const void *, void *), void *); + +#if defined(__cplusplus) +} +#endif + +#endif /* nsQuickSort_h___ */ diff --git a/xpcom/glue/nsQuickSort.cpp b/xpcom/glue/nsQuickSort.cpp new file mode 100644 index 00000000000..dd292d812d5 --- /dev/null +++ b/xpcom/glue/nsQuickSort.cpp @@ -0,0 +1,181 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* We need this because Solaris' version of qsort is broken and + * causes array bounds reads. + */ + +#include +#include "prtypes.h" + +#if !defined(DEBUG) && (defined(__cplusplus) || defined(__gcc)) +# ifndef INLINE +# define INLINE inline +# endif +#else +# define INLINE +#endif + +typedef int cmp_t(const void *, const void *, void *); +static INLINE char *med3(char *, char *, char *, cmp_t *, void *); +static INLINE void swapfunc(char *, char *, int, int); + +/* + * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". + */ +#define swapcode(TYPE, parmi, parmj, n) { \ + long i = (n) / sizeof (TYPE); \ + register TYPE *pi = (TYPE *) (parmi); \ + register TYPE *pj = (TYPE *) (parmj); \ + do { \ + register TYPE t = *pi; \ + *pi++ = *pj; \ + *pj++ = t; \ + } while (--i > 0); \ +} + +#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ + es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1; + +static INLINE void +swapfunc(char *a, char *b, int n, int swaptype) +{ + if(swaptype <= 1) + swapcode(long, a, b, n) + else + swapcode(char, a, b, n) +} + +#define swap(a, b) \ + if (swaptype == 0) { \ + long t = *(long *)(a); \ + *(long *)(a) = *(long *)(b); \ + *(long *)(b) = t; \ + } else \ + swapfunc(a, b, es, swaptype) + +#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) + +static INLINE char * +med3(char *a, char *b, char *c, cmp_t* cmp, void *data) +{ + return cmp(a, b, data) < 0 ? + (cmp(b, c, data) < 0 ? b : (cmp(a, c, data) < 0 ? c : a )) + :(cmp(b, c, data) > 0 ? b : (cmp(a, c, data) < 0 ? a : c )); +} + +void nsQuickSort ( + void *a, + unsigned n, + unsigned es, + cmp_t *cmp, + void *data + ) +{ + char *pa, *pb, *pc, *pd, *pl, *pm, *pn; + int d, r, swaptype, swap_cnt; + +loop: SWAPINIT(a, es); + swap_cnt = 0; + if (n < 7) { + for (pm = (char *)a + es; pm < (char *)a + n * es; pm += es) + for (pl = pm; pl > (char *)a && cmp(pl - es, pl, data) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + pm = (char *)a + (n / 2) * es; + if (n > 7) { + pl = (char *)a; + pn = (char *)a + (n - 1) * es; + if (n > 40) { + d = (n / 8) * es; + pl = med3(pl, pl + d, pl + 2 * d, cmp, data); + pm = med3(pm - d, pm, pm + d, cmp, data); + pn = med3(pn - 2 * d, pn - d, pn, cmp, data); + } + pm = med3(pl, pm, pn, cmp, data); + } + swap(a, pm); + pa = pb = (char *)a + es; + + pc = pd = (char *)a + (n - 1) * es; + for (;;) { + while (pb <= pc && (r = cmp(pb, a, data)) <= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pa, pb); + pa += es; + } + pb += es; + } + while (pb <= pc && (r = cmp(pc, a, data)) >= 0) { + if (r == 0) { + swap_cnt = 1; + swap(pc, pd); + pd -= es; + } + pc -= es; + } + if (pb > pc) + break; + swap(pb, pc); + swap_cnt = 1; + 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(pl - es, pl, data) > 0; + pl -= es) + swap(pl, pl - es); + return; + } + + pn = (char *)a + n * es; + r = PR_MIN(pa - (char *)a, pb - pa); + vecswap(a, pb - r, r); + r = PR_MIN(pd - pc, pn - pd - es); + vecswap(pb, pn - r, r); + if ((r = pb - pa) > es) + nsQuickSort(a, r / es, es, cmp, data); + if ((r = pd - pc) > es) { + /* Iterate rather than recurse to save stack space */ + a = pn - r; + n = r / es; + goto loop; + } +/* nsQuickSort(pn - r, r / es, es, cmp, data);*/ +} diff --git a/xpcom/glue/nsQuickSort.h b/xpcom/glue/nsQuickSort.h new file mode 100644 index 00000000000..6fa043e8bfd --- /dev/null +++ b/xpcom/glue/nsQuickSort.h @@ -0,0 +1,42 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * + * The contents of this file are subject to the Netscape Public License + * Version 1.0 (the "NPL"); you may not use this file except in + * compliance with the NPL. You may obtain a copy of the NPL at + * http://www.mozilla.org/NPL/ + * + * Software distributed under the NPL is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL + * for the specific language governing rights and limitations under the + * NPL. + * + * The Initial Developer of this code under the NPL is Netscape + * Communications Corporation. Portions created by Netscape are + * Copyright (C) 1998 Netscape Communications Corporation. All Rights + * Reserved. + */ + + +/* We need this because Solaris' version of qsort is broken and + * causes array bounds reads. + */ + +#ifndef nsQuickSort_h___ +#define nsQuickSort_h___ + +/* Had to pull the following define out of xp_core.h + * to avoid including xp_core.h. + * That brought in too many header file dependencies. + */ +#if defined(__cplusplus) +extern "C" { +#endif + +extern void nsQuickSort(void *, size_t, size_t, + int (*)(const void *, const void *, void *), void *); + +#if defined(__cplusplus) +} +#endif + +#endif /* nsQuickSort_h___ */