mirror of
https://github.com/ilyakooo0/urbit.git
synced 2024-11-29 12:15:43 +03:00
72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
/* j/3/cut.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
|
|
/* functions
|
|
*/
|
|
u3_noun
|
|
u3qc_cut(u3_atom a,
|
|
u3_atom b,
|
|
u3_atom c,
|
|
u3_atom d)
|
|
{
|
|
if ( !_(u3a_is_cat(a)) || (a >= 32) ) {
|
|
return u3m_bail(c3__fail);
|
|
}
|
|
if ( !_(u3a_is_cat(b)) ) {
|
|
return 0;
|
|
}
|
|
if ( !_(u3a_is_cat(c)) ) {
|
|
c = 0x7fffffff;
|
|
}
|
|
|
|
{
|
|
c3_g a_g = a;
|
|
c3_w b_w = b;
|
|
c3_w c_w = c;
|
|
c3_w len_w = u3r_met(a_g, d);
|
|
|
|
if ( (0 == c_w) || (b_w >= len_w) ) {
|
|
return 0;
|
|
}
|
|
if ( b_w + c_w > len_w ) {
|
|
c_w = (len_w - b_w);
|
|
}
|
|
if ( (b_w == 0) && (c_w == len_w) ) {
|
|
return u3k(d);
|
|
}
|
|
else {
|
|
c3_w* sal_w = u3a_slaq(a_g, c_w);
|
|
|
|
if ( 0 == sal_w ) {
|
|
return u3m_bail(c3__fail);
|
|
}
|
|
u3r_chop(a_g, b_w, c_w, 0, sal_w, d);
|
|
|
|
return u3a_malt(sal_w);
|
|
}
|
|
}
|
|
}
|
|
u3_noun
|
|
u3wc_cut(u3_noun cor)
|
|
{
|
|
u3_noun a, b, c, d;
|
|
|
|
if ( (c3n == u3r_mean(cor, u3x_sam_2, &a,
|
|
u3x_sam_12, &b,
|
|
u3x_sam_13, &c,
|
|
u3x_sam_7, &d, 0)) ||
|
|
(c3n == u3ud(a)) ||
|
|
(c3n == u3ud(b)) ||
|
|
(c3n == u3ud(c)) ||
|
|
(c3n == u3ud(d)) )
|
|
{
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
return u3qc_cut(a, b, c, d);
|
|
}
|
|
}
|
|
|