/*
* TermInfo#tigetflag(capname) => int
*
* TermInfo#tigetflag returns a boolean capability specified by capname.
*/
static VALUE
rt_tigetflag(VALUE self, VALUE v_capname)
{
int ret;
setup(self);
ret = tigetflag(StringValueCStr(v_capname));
if (ret == -1) { rb_raise(eTermInfoError, "not a boolean capability"); }
return RTEST(ret) ? Qtrue : Qfalse;
}