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urbit/jets/c/rep.c
Raymond Pasco 08994156e1 Add missing jet for ++rep
(very ghetto)
2016-08-10 09:34:43 -07:00

88 lines
1.6 KiB
C

/* j/3/rep.c
**
*/
#include "all.h"
/* functions
*/
u3_noun
u3qc_rep(u3_atom a,
u3_noun b)
{
if ( !_(u3a_is_cat(a)) || (a >= 32) ) {
return u3m_bail(c3__exit);
}
else {
c3_g a_g = a;
c3_w tot_w = 0;
c3_w* sal_w;
/* Measure and validate the slab required.
*/
{
u3_noun cab = b;
while ( 1 ) {
u3_noun h_cab;
c3_w len_w;
if ( 0 == cab ) {
break;
}
else if ( c3n == u3du(cab) ) {
return u3m_bail(c3__exit);
}
else if ( c3n == u3ud(h_cab = u3h(cab)) ) {
return u3m_bail(c3__exit);
}
else if ( (tot_w + (len_w = u3r_met(a_g, h_cab))) < tot_w ) {
return u3m_bail(c3__fail);
}
tot_w++;
cab = u3t(cab);
}
if ( 0 == tot_w ) {
return 0;
}
if ( 0 == (sal_w = u3a_slaq(a_g, tot_w)) ) {
return u3m_bail(c3__fail);
}
}
/* Chop the list atoms in.
*/
{
u3_noun cab = b;
c3_w pos_w = 0;
while ( 0 != cab ) {
u3_noun h_cab = u3h(cab);
u3r_chop(a_g, 0, 1, pos_w, sal_w, h_cab);
pos_w++;
cab = u3t(cab);
}
}
// return u3a_moot(sal_w);
return u3a_malt(sal_w);
}
}
u3_noun
u3wc_rep(u3_noun cor)
{
u3_noun a, b;
if ( (c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0)) ||
(c3n == u3ud(a)) )
{
return u3m_bail(c3__exit);
} else {
u3_noun pro;
pro = u3qc_rep(a, b);
return pro;
}
}