IS_ACTIVE        1288 regex.cpp      	  DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg]));	\
IS_ACTIVE        3887 regex.cpp            IS_ACTIVE (reg_info[mcnt]) = 0;
IS_ACTIVE        4233 regex.cpp                IS_ACTIVE (reg_info[*p]) = 1;
IS_ACTIVE        4275 regex.cpp                IS_ACTIVE (reg_info[*p]) = 0;
IS_ACTIVE        4293 regex.cpp                    while (r > 0 && !IS_ACTIVE (reg_info[r]))