From 33b3c95200d21378e6bc5dc202cbbbf55e8e1b26 Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Fri, 19 Jul 2002 17:35:11 +0000
Subject: [PATCH] Complete TODO item:
* -Add BSD-licensed qsort() for Solaris
---
configure | 8 ++
configure.in | 9 +-
src/Makefile.global.in | 5 +-
src/backend/port/Makefile | 8 +-
src/port/Makefile | 12 +--
src/port/qsort.c | 208 ++++++++++++++++++++++++++++++++++++++
6 files changed, 239 insertions(+), 11 deletions(-)
create mode 100644 src/port/qsort.c
diff --git a/configure b/configure
index 618763bd720..18743ba3650 100755
--- a/configure
+++ b/configure
@@ -11902,6 +11902,13 @@ case $host_os in
esac
+# Set path of qsort for solaris, which has a very slow qsort in certain cases.
+QSORT=""
+case $host_os in
+ solaris*) DLLINIT='$(top_builddir)/src/backend/port/qsort.o' ;;
+esac
+
+
# On HPUX 9, rint() is not in regular libm.a but in /lib/pa1.1/libm.a;
# this hackery with HPUXMATHLIB allows us to cope.
HPUXMATHLIB=""
@@ -17584,6 +17591,7 @@ s,@STRTOL@,$STRTOL,;t t
s,@STRTOUL@,$STRTOUL,;t t
s,@STRCASECMP@,$STRCASECMP,;t t
s,@DLLINIT@,$DLLINIT,;t t
+s,@QSORT@,$QSORT,;t t
s,@HPUXMATHLIB@,$HPUXMATHLIB,;t t
s,@HAVE_POSIX_SIGNALS@,$HAVE_POSIX_SIGNALS,;t t
s,@MSGFMT@,$MSGFMT,;t t
diff --git a/configure.in b/configure.in
index 9fba297a17a..8650e126e86 100644
--- a/configure.in
+++ b/configure.in
@@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
-dnl $Header: /cvsroot/pgsql/configure.in,v 1.192 2002/07/18 04:13:59 momjian Exp $
+dnl $Header: /cvsroot/pgsql/configure.in,v 1.193 2002/07/19 17:35:09 momjian Exp $
dnl
dnl Developers, please strive to achieve this order:
dnl
@@ -932,6 +932,13 @@ case $host_os in
esac
AC_SUBST(DLLINIT)
+# Set path of qsort for solaris, which has a very slow qsort in certain cases.
+QSORT=""
+case $host_os in
+ solaris*) DLLINIT='$(top_builddir)/src/backend/port/qsort.o' ;;
+esac
+AC_SUBST(QSORT)
+
# On HPUX 9, rint() is not in regular libm.a but in /lib/pa1.1/libm.a;
# this hackery with HPUXMATHLIB allows us to cope.
HPUXMATHLIB=""
diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index 698208bd01a..f3d04c19273 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -1,5 +1,5 @@
# -*-makefile-*-
-# $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.150 2002/07/18 04:30:36 momjian Exp $
+# $Header: /cvsroot/pgsql/src/Makefile.global.in,v 1.151 2002/07/19 17:35:10 momjian Exp $
#------------------------------------------------------------------------------
# All PostgreSQL makefiles include this file and use the variables it sets,
@@ -352,6 +352,7 @@ INET_ATON = @INET_ATON@
ISINF = @ISINF@
MEMCMP = @MEMCMP@
MISSING_RANDOM = @MISSING_RANDOM@
+QSORT = @QSORT@
SNPRINTF = @SNPRINTF@
SRANDOM = @SRANDOM@
STRCASECMP = @STRCASECMP@
@@ -360,7 +361,7 @@ STRERROR = @STRERROR@
STRTOL = @STRTOL@
STRTOUL = @STRTOUL@
-# Used by the backend
+# Not really standard libc functions, used by the backend.
DLLINIT = @DLLINIT@
TAS = @TAS@
diff --git a/src/backend/port/Makefile b/src/backend/port/Makefile
index 8ae3e54f836..2960526c5af 100644
--- a/src/backend/port/Makefile
+++ b/src/backend/port/Makefile
@@ -13,7 +13,7 @@
# be converted to Method 2.
#
# IDENTIFICATION
-# $Header: /cvsroot/pgsql/src/backend/port/Makefile,v 1.16 2002/07/18 04:13:59 momjian Exp $
+# $Header: /cvsroot/pgsql/src/backend/port/Makefile,v 1.17 2002/07/19 17:35:11 momjian Exp $
#
#-------------------------------------------------------------------------
@@ -21,7 +21,11 @@ subdir = src/backend/port
top_builddir = ../../..
include $(top_builddir)/src/Makefile.global
-OBJS=dynloader.o pg_sema.o pg_shmem.o
+OBJS=$(GETHOSTNAME) $(GETRUSAGE) $(INET_ATON) $(ISINF) $(MEMCMP) \
+ $(MISSING_RANDOM) $(QSORT) $(SNPRINTF) $(SRANDOM) $(STRCASECMP) \
+ $(STRDUP) $(STRERROR) $(STRTOL) $(STRTOUL)
+
+OBJS+=dynloader.o pg_sema.o pg_shmem.o
OBJS+=$(DLLINIT)
diff --git a/src/port/Makefile b/src/port/Makefile
index 77499ae03e7..b005143018a 100644
--- a/src/port/Makefile
+++ b/src/port/Makefile
@@ -7,7 +7,7 @@
# with broken/missing library files.
# IDENTIFICATION
-# $Header: /cvsroot/pgsql/src/port/Makefile,v 1.1 2002/07/18 04:13:59 momjian Exp $
+# $Header: /cvsroot/pgsql/src/port/Makefile,v 1.2 2002/07/19 17:35:11 momjian Exp $
#
#-------------------------------------------------------------------------
@@ -15,9 +15,9 @@ subdir = src/port
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
-OBJS=$(GETHOSTNAME) $(GETRUSAGE) $(INET_ATON) $(ISINF) $(MEMCMP) \
- $(MISSING_RANDOM) $(SNPRINTF) $(SRANDOM) $(STRCASECMP) $(STRDUP) \
- $(STRERROR) $(STRTOL) $(STRTOUL)
-distclean clean:
- rm -f $(OBJS)
+#
+# The backend/port directory removes these files.
+#
+#distclean clean:
+# rm -f $(OBJS)
diff --git a/src/port/qsort.c b/src/port/qsort.c
new file mode 100644
index 00000000000..5562f603aa4
--- /dev/null
+++ b/src/port/qsort.c
@@ -0,0 +1,208 @@
+/*
+ * Copied from NetBSD CVS, 2002-07-19, bjm
+ * Add do ... while() macro fix
+ * Remove __inline, _DIAGASSERTs
+ */
+
+/* $NetBSD: qsort.c,v 1.12 1999/09/20 04:39:40 lukem Exp $ */
+
+/*-
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+
+static char *med3 __P((char *, char *, char *,
+ int (*) (const void *, const void *)));
+static void swapfunc __P((char *, char *, size_t, int));
+
+#define min(a, b) (a) < (b) ? a : b
+
+/*
+ * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
+ */
+#define swapcode(TYPE, parmi, parmj, n) \
+do { \
+ size_t i = (n) / sizeof (TYPE); \
+ TYPE *pi = (TYPE *)(void *)(parmi); \
+ TYPE *pj = (TYPE *)(void *)(parmj); \
+ do { \
+ TYPE t = *pi; \
+ *pi++ = *pj; \
+ *pj++ = t; \
+ } while (--i > 0); \
+} while (0)
+
+#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
+ es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
+
+static void
+swapfunc(a, b, n, swaptype)
+char *a,
+ *b;
+size_t 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 *)(void *)(a); \
+ *(long *)(void *)(a) = *(long *)(void *)(b); \
+ *(long *)(void *)(b) = t; \
+ } else \
+ swapfunc(a, b, es, swaptype)
+
+#define vecswap(a, b, n) if ((n) > 0) swapfunc((a), (b), (size_t)(n), swaptype)
+
+static char *
+med3(a, b, c, cmp)
+char *a,
+ *b,
+ *c;
+int (*cmp) __P((const void *, const void *));
+{
+ return cmp(a, b) < 0 ?
+ (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a))
+ : (cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c));
+}
+
+void
+qsort(a, n, es, cmp)
+void *a;
+size_t n,
+ es;
+int (*cmp) __P((const void *, const void *));
+{
+ 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) > 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);
+ pm = med3(pm - d, pm, pm + d, cmp);
+ pn = med3(pn - 2 * d, pn - d, pn, cmp);
+ }
+ pm = med3(pl, pm, pn, cmp);
+ }
+ swap(a, pm);
+ pa = pb = (char *) a + es;
+
+ pc = pd = (char *) a + (n - 1) * es;
+ for (;;)
+ {
+ while (pb <= pc && (r = cmp(pb, a)) <= 0)
+ {
+ if (r == 0)
+ {
+ swap_cnt = 1;
+ swap(pa, pb);
+ pa += es;
+ }
+ pb += es;
+ }
+ while (pb <= pc && (r = cmp(pc, a)) >= 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) > 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 ((r = pb - pa) > es)
+ qsort(a, r / es, es, cmp);
+ if ((r = pd - pc) > es)
+ {
+ /* Iterate rather than recurse to save stack space */
+ a = pn - r;
+ n = r / es;
+ goto loop;
+ }
+/* qsort(pn - r, r / es, es, cmp);*/
+}
--
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