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93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* j/6/wrap.c
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**
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*/
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#include "all.h"
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static u3_noun _cqfu_wrap(u3_noun, u3_noun, u3_noun);
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static u3_noun
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_wrap_fork(u3_noun van, u3_noun p_sut, u3_noun yoz)
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{
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if ( u3_nul == p_sut ) {
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return u3_nul;
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}
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else {
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return u3nc(_cqfu_wrap(van, u3h(p_sut), yoz),
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_wrap_fork(van, u3t(p_sut), yoz));
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}
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}
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static u3_noun
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_cqfu_wrap(u3_noun van,
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u3_noun sut,
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u3_noun yoz)
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{
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u3_noun p_sut, q_sut;
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if ( c3n == u3du(sut) ) {
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return u3m_error("wrap-type");
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}
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else switch ( u3h(sut) ) {
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default: return u3m_error("wrap-type");
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case c3__core: u3x_cell(u3t(sut), &p_sut, &q_sut);
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{
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u3_noun pq_sut, qq_sut, rq_sut;
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if ( c3n == u3r_trel(q_sut, &pq_sut, &qq_sut, &rq_sut) ) {
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return u3m_bail(c3__fail);
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}
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else if ( c3__gold != pq_sut ) {
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return u3m_error("wrap-gold");
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}
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else {
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return u3nt(c3__core,
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u3k(p_sut),
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u3nt(u3k(yoz),
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u3k(qq_sut),
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u3k(rq_sut)));
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}
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}
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case c3__fork: p_sut = u3t(sut);
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{
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u3_noun yed = u3qdi_tap(p_sut, u3_nul);
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u3_noun ret = u3kf_fork(_wrap_fork(van, yed, yoz));
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u3z(yed);
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return ret;
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}
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case c3__hold:
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{
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u3_noun fop = u3qfu_repo(van, sut);
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u3_noun pro = _cqfu_wrap(van, fop, yoz);
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u3z(fop);
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return pro;
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}
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}
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}
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/* boilerplate
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*/
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u3_noun
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u3wfu_wrap(u3_noun cor)
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{
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u3_noun sut, yoz, van;
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if ( (c3n == u3r_mean(cor, u3x_sam, &yoz, u3x_con, &van, 0)) ||
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(u3_none == (sut = u3r_at(u3x_sam, van))) )
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{
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return u3m_bail(c3__fail);
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} else {
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return _cqfu_wrap(van, sut, yoz);
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}
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}
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u3_noun
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u3qfu_wrap(u3_noun van,
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u3_noun sut,
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u3_noun yoz)
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{
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return _cqfu_wrap(van, sut, yoz);
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}
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