D_IFDEF
if (FORMAT_MISMATCHED(D_IFDEF))
diff_format = D_IFDEF;
if (diff_format == D_IFDEF)
if ((diff_format != D_IFDEF || diff_format == D_GFORMAT) &&
if (diff_format == D_NORMAL || diff_format == D_IFDEF) {
if ((diff_format == D_IFDEF) && oldfile) {
if (diff_format == D_IFDEF) {
if (diff_format != D_IFDEF && diff_format != D_GFORMAT &&
if (diff_format == D_IFDEF || diff_format == D_GFORMAT) {