1 files changed, 84 insertions, 0 deletions
diff --git a/eqn/over.c b/eqn/over.c
new file mode 100644
index 0000000000000..854709a69988d
--- /dev/null
+++ b/eqn/over.c
@@ -0,0 +1,84 @@
+/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+/*
+ * Copyright (c) 1980 Regents of the University of California.
+ * All rights reserved. The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ */
+     
+/*
+ * Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc.
+ * All Rights Reserved.
+ */
+  
+/*	from OpenSolaris "over.c	1.4	05/06/02 SMI"	 SVr4.0 1.1		*/
+
+/*
+ * Portions Copyright (c) 2005 Gunnar Ritter, Freiburg i. Br., Germany
+ *
+ * Sccsid @(#)over.c	1.5 (gritter) 10/19/06
+ */
+
+/*
+ * Changes Copyright (c) 2014 Carsten Kunze (carsten.kunze at arcor.de)
+ */
+
+# include "e.h"
+#include "y.tab.h"
+
+extern YYSTYPE yyval;
+
+void
+boverb(int p1, int p2) {
+	int treg;
+#ifndef	NEQN
+	float h, b, d;
+#else	/* NEQN */
+	int h, b, d;
+#endif	/* NEQN */
+
+	treg = oalloc();
+	yyval.token = p1;
+#ifndef NEQN
+	d = VERT(EM(0.3, ps));
+	h = eht[p1] + eht[p2] + d;
+#else /* NEQN */
+	d = VERT(1);
+	h = eht[p1] + eht[p2];
+#endif /* NEQN */
+	b = eht[p2] - d;
+#ifndef	NEQN
+	if(dbg)printf(".\tb:bob: S%d <- S%d over S%d; b=%g, h=%g\n", 
+		yyval.token, p1, p2, b, h);
+#else	/* NEQN */
+	if(dbg)printf(".\tb:bob: S%d <- S%d over S%d; b=%d, h=%d\n", 
+		yyval.token, p1, p2, b, h);
+#endif	/* NEQN */
+	nrwid(p1, ps, p1);
+	nrwid(p2, ps, p2);
+	printf(".nr %d \\n(%d\n", treg, p1);
+	printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2);
+#ifndef NEQN
+	printf(".nr %d \\n(%d+\\s%s.5m\\s0\n", treg, treg, tsize(EFFPS(ps)));
+	printf(".ds %d \\v'%gp'\\h'\\n(%du-\\n(%du/2u'\\*(%d\\\n", 
+		yyval.token, eht[p2]-ebase[p2]-d, treg, p2, p2);
+	printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%gp'\\*(%d\\\n", 
+		p2, p1, -(eht[p2]-ebase[p2]+d+ebase[p1]), p1);
+	printf("\\h'-\\n(%du-\\n(%du/2u+.1m'\\v'%gp'\\l'\\n(%du-.2m'\\h'.1m'\\v'%gp'\n", 
+		 treg, p1, ebase[p1]+d, treg, d);
+#else /* NEQN */
+	printf(".ds %d \\v'%du'\\h'\\n(%du-\\n(%du/2u'\\*(%d\\\n", 
+		yyval.token, eht[p2]-ebase[p2]-d, treg, p2, p2);
+	printf("\\h'-\\n(%du-\\n(%du/2u'\\v'%du'\\*(%d\\\n", 
+		p2, p1, -eht[p2]+ebase[p2]-ebase[p1], p1);
+	printf("\\h'-\\n(%du-\\n(%du-2u/2u'\\v'%du'\\l'\\n(%du'\\v'%du'\n", 
+		 treg, p1, ebase[p1], treg, d);
+#endif /* NEQN */
+	ebase[yyval.token] = b;
+	eht[yyval.token] = h;
+	lfont[yyval.token] = rfont[yyval.token] = 0;
+	ofree(p2);
+	ofree(treg);
+}