urbit/jets/f/ut_wrap.c
2015-08-28 11:34:36 -05:00

77 lines
1.6 KiB
C

/* j/6/wrap.c
**
*/
#include "all.h"
static u3_noun
_cqfu_wrap(u3_noun van,
u3_noun sut,
u3_noun yoz)
{
u3_noun p_sut, q_sut;
if ( c3n == u3du(sut) ) {
return u3m_error("wrap-type");
}
else switch ( u3h(sut) ) {
default: return u3m_error("wrap-type");
case c3__core: u3x_cell(u3t(sut), &p_sut, &q_sut);
{
u3_noun pq_sut, qq_sut, rq_sut;
if ( c3n == u3r_trel(q_sut, &pq_sut, &qq_sut, &rq_sut) ) {
return u3m_bail(c3__fail);
}
else if ( c3__gold != pq_sut ) {
return u3m_error("wrap-gold");
}
else {
return u3nt(c3__core,
u3k(p_sut),
u3nt(u3k(yoz),
u3k(qq_sut),
u3k(rq_sut)));
}
}
case c3__fork: u3x_cell(u3t(sut), &p_sut, &q_sut);
{
return u3qf_fork(_cqfu_wrap(van, p_sut, yoz),
_cqfu_wrap(van, q_sut, yoz));
}
case c3__hold:
{
u3_noun fop = u3qfu_repo(van, sut);
u3_noun pro = _cqfu_wrap(van, fop, yoz);
u3z(fop);
return pro;
}
}
}
/* boilerplate
*/
u3_noun
u3wfu_wrap(u3_noun cor)
{
u3_noun sut, yoz, van;
if ( (c3n == u3r_mean(cor, u3x_sam, &yoz, u3x_con, &van, 0)) ||
(u3_none == (sut = u3r_at(u3x_sam, van))) )
{
return u3m_bail(c3__fail);
} else {
return _cqfu_wrap(van, sut, yoz);
}
}
u3_noun
u3qfu_wrap(u3_noun van,
u3_noun sut,
u3_noun yoz)
{
return _cqfu_wrap(van, sut, yoz);
}