shithub: jbig2

Info  •  Files  •  Log  •  Branches

Error if the symbol id indicated for refinement in a refagg symbol 
dictionary segment is out of range. UBC test stream 042_13 triggers
this, we don't fix this here, only handle the error more verbosely.


git-svn-id: http://svn.ghostscript.com/jbig2dec/trunk@359 ded80894-8fb9-0310-811b-c03f3676ab4d

--- a/jbig2_symbol_dict.c

+++ b/jbig2_symbol_dict.c

@@ -387,6 +387,10 @@

 		          code = jbig2_arith_int_decode(IARDY, as, &RDY);

 		      }

+		      if (ID >= ninsyms+NSYMSDECODED)

+			return jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number,

+			  "refinement references unknown symbol %d", ID);

+   

 		      jbig2_error(ctx, JBIG2_SEVERITY_DEBUG, segment->number,

 			"symbol is a refinement of id %d with the refinement applied at (%d,%d)",

 			ID, RDX, RDY);

@@ -395,7 +399,7 @@

 		      /* Table 18 */

 		      rparams.GRTEMPLATE = params->SDRTEMPLATE;

-		      rparams.reference = (ninsyms > ID) ? 

+		      rparams.reference = (ninsyms >= ID) ? 

 					params->SDINSYMS->glyphs[ID] :

 					SDNEWSYMS->glyphs[ID-ninsyms];

 		      rparams.DX = RDX;