shithub: jbig2

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Bug 693284: Don't shift 32-bit value by 32.

--- a/jbig2_huffman.c

+++ b/jbig2_huffman.c

@@ -255,7 +255,8 @@

       int log_table_size = table->log_table_size;

       int PREFLEN;

-      entry = &table->entries[this_word >> (32 - log_table_size)];

+      /* SumatraPDF: shifting by the size of the operand is undefined */

+      entry = &table->entries[log_table_size > 0 ? this_word >> (32 - log_table_size) : 0];

       flags = entry->flags;

       PREFLEN = entry->PREFLEN;

       if ((flags == (byte)-1) && (PREFLEN == (byte)-1) && (entry->u.RANGELOW == -1))