SGI SI GLU library

1 files changed, 141 insertions, 0 deletions

diff --git a/src/glu/sgi/libnurbs/internals/sorter.cc b/src/glu/sgi/libnurbs/internals/sorter.cc
new file mode 100644
index 0000000000..308f8e8ccc
--- /dev/null
+++ b/src/glu/sgi/libnurbs/internals/sorter.cc
@@ -0,0 +1,141 @@
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+*/
+
+/*
+ * sorter.c++
+ *
+ * $Date: 2001/03/17 00:25:41 $ $Revision: 1.1 $
+ * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/sorter.cc,v 1.1 2001/03/17 00:25:41 brianp Exp $
+ */
+
+#include "glimports.h"
+#include "sorter.h"
+#include "mystdio.h"
+
+Sorter::Sorter( int _es )
+{
+    es = _es;
+}
+
+void
+Sorter::qsort( void *a, int n )
+{
+    qs1( (char *)a, ((char *)a)+n*es);
+}
+
+int
+Sorter::qscmp( char *, char * )
+{
+    dprintf( "Sorter::qscmp: pure virtual called\n" );
+    return 0;
+}
+
+
+void
+Sorter::qsexc( char *, char * )
+{
+    dprintf( "Sorter::qsexc: pure virtual called\n" );
+}
+
+
+void
+Sorter::qstexc( char *, char *, char * )
+{
+    dprintf( "Sorter::qstexc: pure virtual called\n" );
+}
+
+void
+Sorter::qs1( char *a,  char *l )
+{
+    char *i, *j;
+    char	*lp, *hp;
+    int	c;
+    unsigned int n;
+
+start:
+    if((n=l-a) <= es)
+	    return;
+    n = es * (n / (2*es));
+    hp = lp = a+n;
+    i = a;
+    j = l-es;
+    while(1) {
+	if(i < lp) {
+	    if((c = qscmp(i, lp)) == 0) {
+		qsexc(i, lp -= es);
+		continue;
+	    }
+	    if(c < 0) {
+		i += es;
+		continue;
+	    }
+	}
+
+loop:
+	if(j > hp) {
+	    if((c = qscmp(hp, j)) == 0) {
+		qsexc(hp += es, j);
+		goto loop;
+	    }
+	    if(c > 0) {
+		if(i == lp) {
+		    qstexc(i, hp += es, j);
+		    i = lp += es;
+		    goto loop;
+		}
+		qsexc(i, j);
+		j -= es;
+		i += es;
+		continue;
+	    }
+	    j -= es;
+	    goto loop;
+	}
+
+	if(i == lp) {
+	    if(lp-a >= l-hp) {
+		qs1(hp+es, l);
+		l = lp;
+	    } else {
+		qs1(a, lp);
+		a = hp+es;
+	    }
+	    goto start;
+	}
+
+	qstexc(j, lp -= es, i);
+	j = hp -= es;
+    }
+}
+