From b758881a58e079ab63e04f9a2e97523e2f593602 Mon Sep 17 00:00:00 2001
From: handa <handa>
Date: Wed, 7 Jul 2004 13:12:28 +0000
Subject: [PATCH] (lookup_gsub): For LookupType 5 Subformat 2, if ClassSet is
 not defined, do nothing.

---
 src/otfdrive.c |   35 ++++++++++++++++++-----------------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/src/otfdrive.c b/src/otfdrive.c
index ff1245e..fd4bab0 100644
--- a/src/otfdrive.c
+++ b/src/otfdrive.c
@@ -493,23 +493,24 @@ lookup_gsub (OTF_LookupList *lookup_list, unsigned lookup_list_index,
 
 	      class = get_class_def (&context2->ClassDef, g->glyph_id);
 	      set = context2->ClassSet + class;
-	      for (j = 0; j < set->ClassRuleCnt; j++)
-		{
-		  rule = set->ClassRule + j;
-		  if (match_classes (&context2->ClassDef,
-				     gstring, gidx + 1,
-				     rule->GlyphCount - 1, rule->Class)
-		      < 0)
-		    continue;
-		  orig_used = gstring->used;
-		  for (k = 0; k < rule->LookupCount; k++)
-		    lookup_gsub (lookup_list,
-				 rule->LookupRecord[k].LookupListIndex,
-				 gstring,
-				 gidx + rule->LookupRecord[k].SequenceIndex);
-		  gidx += rule->GlyphCount + (gstring->used - orig_used);
-		  break;
-		}
+	      if (set)
+		for (j = 0; j < set->ClassRuleCnt; j++)
+		  {
+		    rule = set->ClassRule + j;
+		    if (match_classes (&context2->ClassDef,
+				       gstring, gidx + 1,
+				       rule->GlyphCount - 1, rule->Class)
+			< 0)
+		      continue;
+		    orig_used = gstring->used;
+		    for (k = 0; k < rule->LookupCount; k++)
+		      lookup_gsub (lookup_list,
+				   rule->LookupRecord[k].LookupListIndex,
+				   gstring,
+				   gidx + rule->LookupRecord[k].SequenceIndex);
+		    gidx += rule->GlyphCount + (gstring->used - orig_used);
+		    break;
+		  }
 	    }
 	  else 			/* subtable->Format == 3 */
 	    {
-- 
1.7.10.4