rev 466 - trunk

Author: giles
Date: 2008-05-16 16:58:59 -0700 (Fri, 16 May 2008)
New Revision: 466

Modified:
   trunk/jbig2_text.c
Log:
Only check for a code length antecedent under RUNCODE32. RUNCODE33 and=20
RUNCODE34 specify a repeat of zero so a previous code length isn't=20
necessary.

Thanks to Justin Greer for catching this. Ghostscript bug 689835.


Modified: trunk/jbig2_text.c
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- trunk/jbig2_text.c	2008-05-16 23:48:20 UTC (rev 465)
+++ trunk/jbig2_text.c	2008-05-16 23:58:59 UTC (rev 466)
@@ -141,14 +141,14 @@
 	    len =3D code;
 	    range =3D 1;
 	  } else {
-	    if (index < 1) {
-	      jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number,
-		"error decoding symbol id table: run length with no antecedent!");
-	      /* todo: memory cleanup */
-	      return -1;
-	    }
 	    if (code =3D=3D 32) {
 	      len =3D symcodelengths[index-1].PREFLEN;
+	      if (index < 1) {
+		jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number,
+	 	  "error decoding symbol id table: run length with no antecedent!");
+	        /* todo: memory cleanup */
+	        return -1;
+	      }
 	    } else {
 	      len =3D 0; /* code =3D=3D 33 or 34 */
 	    }