1 files changed, 75 insertions, 0 deletions
diff --git a/src/cmd/eqn/diacrit.c b/src/cmd/eqn/diacrit.c
new file mode 100644
index 00000000..10dc8c75
--- /dev/null
+++ b/src/cmd/eqn/diacrit.c
@@ -0,0 +1,75 @@
+#include "e.h"
+#include "y.tab.h"
+
+extern double Dvshift, Dhshift, Dh2shift, Dheight, Barv, Barh, Ubarv, Ubarh;
+
+void diacrit(int p1, int type)
+{
+	int c, t;
+
+	c = salloc();
+	t = salloc();
+	nrwid(p1, ps, p1);
+	printf(".nr 10 %gm\n", max(REL(eht[p1]-ebase[p1]-1,ps), 0));	/* vert shift if high */
+	if (type == HIGHBAR)
+		printf(".nr 10 \\n(10+%gm\n", Dvshift);
+	else if (type == LOWBAR)
+		printf(".nr 10 0\n");
+	else
+		printf(".if \\n(ct>1 .nr 10 \\n(10+%gm\n", Dvshift);
+	printf(".nr %d %gm\n", t, Dhshift);	/* horiz shift if high */
+	printf(".if \\n(ct>1 .nr %d %gm\n", t, Dh2shift);	/* was .1 and .15 */
+	switch (type) {
+	case VEC:
+		printf(".ds %d %s\n", c, lookup(deftbl, "vec_def")->cval);
+		break;
+	case DYAD:
+		printf(".ds %d %s\n", c, lookup(deftbl, "dyad_def")->cval);
+		break;
+	case HAT:
+		printf(".ds %d %s\n", c, lookup(deftbl, "hat_def")->cval);
+		break;
+	case TILDE:
+		printf(".ds %d %s\n", c, lookup(deftbl, "tilde_def")->cval);
+		break;
+	case DOT:
+		printf(".ds %d %s\n", c, lookup(deftbl, "dot_def")->cval);
+		break;
+	case DOTDOT:
+		printf(".ds %d %s\n", c, lookup(deftbl, "dotdot_def")->cval);
+		break;
+	case BAR:
+	case LOWBAR:
+	case HIGHBAR:
+		printf(".ds %d \\v'%gm'\\h'%gm'\\l'\\n(%du-%gm'\\h'%gm'\\v'%gm'\n",
+			c, -Barv, Barh, p1, 2*Barh, Barh, Barv);
+		break;
+	case UNDER:
+		printf(".ds %d \\v'%gm'\\l'\\n(%du-%gm\\(ul'\\h'%gm'\\v'%gm'\n",
+			c, -Ubarv, p1, Ubarh, Ubarh, Ubarv);
+		/* printf(".ds %d \\v'-%gm'\\l'\\n(%du\\(ul'\\v'%gm'\n",
+			c, Ubarv, p1, Ubarv);
+		*/
+		printf(".nr %d 0\n", t);
+		printf(".nr 10 0-.1m-%gm\n", REL(ebase[p1],ps));
+		printf(".if \\n(ct%%2=1 .nr 10 0\\n(10-.1m\n");
+		break;
+	case UTILDE:
+		printf(".ds %d %s\n", c, lookup(deftbl, "utilde_def")->cval);
+		printf(".nr %d 0\n", t);
+		printf(".nr 10 0-%gm\n", REL(ebase[p1],ps));
+		printf(".if \\n(ct%%2=1 .nr 10 0\\n(10-%gm\n", 0.1);
+		break;
+	}
+	nrwid(c, ps, c);
+	if (lfont[p1] != ITAL)
+		printf(".nr %d 0\n", t);
+	printf(".as %d \\h'-\\n(%du-\\n(%du/2u+\\n(%du'\\v'0-\\n(10u'\\*(%d", 
+		p1, p1, c, t, c);
+	printf("\\v'\\n(10u'\\h'-\\n(%du+\\n(%du/2u-\\n(%du'\n", c, p1, t);
+	if (type != UNDER && type != UTILDE)
+		eht[p1] += EM(Dheight, ps);	/* was .15 */
+	dprintf(".\tdiacrit: %c over S%d, lf=%c, rf=%c, h=%g, b=%g\n",
+		type, p1, lfont[p1], rfont[p1], eht[p1], ebase[p1]);
+	sfree(c); sfree(t);
+}