DEFAULT_MW_OFF
mw->mw_buf_offset = DEFAULT_MW_OFF;
*offset = val1 ? val1 : DEFAULT_MW_OFF;
*offset = val2 ? val2 : DEFAULT_MW_OFF;
*offset = val3 ? val3 : DEFAULT_MW_OFF;
*buf_offset = DEFAULT_MW_OFF;
*buf_offset = DEFAULT_MW_OFF;