(MAX_MAP_SET_LEVEL): Increased to 30. (PUSH_MAPPING_STACK): Enclose with do-while block. (POP_MAPPING_STACK): Likewise. (stack_idx_of_map_multiple): New variable. (CCL_CALL_FOR_MAP_INSTRUCTION): New macro. (ccl_driver) <CCL_IterateMultipleMap>: If the content is a symbol, call the corresponding CCL program by CCL_CALL_FOR_MAP_INSTRUCTION. (ccl_driver) <CCL_MapSingle>: Likewise. (ccl_driver) <CCL_MapMultiple>: Rewritten to fix many bugs, deal with the case where looking up process reaches to the end of map-set, and call CCL programs as the above change.
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