mirror of
https://github.com/urbit/shrub.git
synced 2024-12-22 18:31:44 +03:00
89 lines
1.8 KiB
C
89 lines
1.8 KiB
C
/* j/2/sort.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
// like skid, except its callback is $-([* *] ?) and it takes the second
|
|
// argument so that it calls its callback with [i.list, second]
|
|
//
|
|
// all args are RETAINED
|
|
static u3_noun
|
|
_split_in(u3j_site* sit_u,
|
|
u3_noun a,
|
|
u3_noun second)
|
|
{
|
|
if ( 0 == a ) {
|
|
return u3nc(u3_nul, u3_nul);
|
|
}
|
|
else if ( c3n == u3du(a) ) {
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
u3_noun acc = _split_in(sit_u, u3t(a), second);
|
|
u3_noun hoz = u3j_gate_slam(sit_u, u3nc(u3k(u3h(a)), u3k(second)));
|
|
u3_noun nex;
|
|
|
|
if ( c3y == hoz ) {
|
|
nex = u3nc(u3nc(u3k(u3h(a)), u3k(u3h(acc))), u3k(u3t(acc)));
|
|
}
|
|
else {
|
|
nex = u3nc(u3k(u3h(acc)), u3nc(u3k(u3h(a)), u3k(u3t(acc))));
|
|
}
|
|
u3z(hoz);
|
|
u3z(acc);
|
|
|
|
return nex;
|
|
}
|
|
}
|
|
|
|
static u3_noun
|
|
_sort_in(u3j_site* sit_u, u3_noun list)
|
|
{
|
|
if ( 0 == list ) {
|
|
return u3_nul;
|
|
}
|
|
else if ( c3n == u3du(list) ) {
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
u3_noun hed, tal;
|
|
u3x_cell(list, &hed, &tal);
|
|
|
|
u3_noun split = _split_in(sit_u, tal, hed);
|
|
u3_noun lhs = _sort_in(sit_u, u3h(split));
|
|
u3_noun rhs = u3nc(u3k(hed), _sort_in(sit_u, u3t(split)));
|
|
|
|
u3_noun ret = u3qb_weld(lhs, rhs);
|
|
u3z(lhs);
|
|
u3z(rhs);
|
|
u3z(split);
|
|
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
u3_noun
|
|
u3qb_sort(u3_noun a,
|
|
u3_noun b)
|
|
{
|
|
u3_noun pro;
|
|
u3j_site sit_u;
|
|
u3j_gate_prep(&sit_u, u3k(b));
|
|
pro = _sort_in(&sit_u, a);
|
|
u3j_gate_lose(&sit_u);
|
|
return pro;
|
|
}
|
|
u3_noun
|
|
u3wb_sort(u3_noun cor)
|
|
{
|
|
u3_noun a, b;
|
|
|
|
if ( c3n == u3r_mean(cor, u3x_sam_2, &a, u3x_sam_3, &b, 0) ) {
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
return u3qb_sort(a, b);
|
|
}
|
|
}
|
|
|