Full support for eqn positionals (above, over, sup, sub, etc.).

1 files changed, 21 insertions, 2 deletions

diff --git a/eqn.c b/eqn.c
index 37488919..b4087f26 100644
--- a/eqn.c
+++ b/eqn.c
@@ -80,11 +80,22 @@ static	const struct eqnstr eqnmarks[EQNMARK__MAX] = {
 };
 
 static	const struct eqnstr eqnfonts[EQNFONT__MAX] = {
+	{ "", 0 },
 	{ "roman", 5 },
 	{ "bold", 4 },
 	{ "italic", 6 },
 };
 
+static	const struct eqnstr eqnposs[EQNPOS__MAX] = {
+	{ "", 0 },
+	{ "over", 4 },
+	{ "sup", 3 },
+	{ "sub", 3 },
+	{ "to", 2 },
+	{ "from", 4 },
+	{ "above", 5 },
+};
+
 /* ARGSUSED */
 enum rofferr
 eqn_read(struct eqn_node **epp, int ln, 
@@ -189,8 +200,7 @@ eqn_box(struct eqn_node *ep, struct eqn_box *last, struct eqn_box **sv)
 
 	*sv = last;
 	nextc = 1;
-	font = EQNFONT_NONE;
-
+	font = EQNFONT_NONE;  
 again:
 	if (NULL == (start = eqn_nexttok(ep, &sz)))
 		return(0);
@@ -204,6 +214,15 @@ again:
 		goto again;
 	}
 
+	for (i = 0; i < (int)EQNFONT__MAX; i++) {
+		if (eqnposs[i].sz != sz)
+			continue;
+		if (strncmp(eqnposs[i].name, start, sz))
+			continue;
+		last->pos = (enum eqn_post)i;
+		goto again;
+	}
+
 	for (i = 0; i < (int)EQN__MAX; i++) {
 		if (eqnparts[i].str.sz != sz)
 			continue;