TESTCASE( _PDCLIB_strtox_prelim( test3, &sign, &base ) == NULL );
base = 37;
TESTCASE( _PDCLIB_strtox_prelim( test3, &sign, &base ) == NULL );
TESTCASE( _PDCLIB_strtox_prelim( test3, &sign, &base ) == NULL );
base = 37;
TESTCASE( _PDCLIB_strtox_prelim( test3, &sign, &base ) == NULL );