mirror of
https://github.com/urbit/shrub.git
synced 2024-12-23 02:41:35 +03:00
51 lines
996 B
C
51 lines
996 B
C
/* j/3/rev.c
|
|
**
|
|
*/
|
|
#include "all.h"
|
|
|
|
/* functions
|
|
*/
|
|
|
|
u3_noun
|
|
u3qc_rev(u3_atom boz,
|
|
u3_atom len,
|
|
u3_atom dat)
|
|
{
|
|
if ( !_(u3a_is_cat(boz)) || (boz >= 32) ||
|
|
!_(u3a_is_cat(len)) ) {
|
|
return u3m_bail(c3__fail);
|
|
}
|
|
|
|
dat = u3qc_end(boz, len, dat);
|
|
c3_w met = u3r_met(boz, dat);
|
|
return u3kc_lsh(u3k(boz), (len - met), u3kc_swp(u3k(boz), dat));
|
|
}
|
|
|
|
u3_noun
|
|
u3wc_rev(u3_noun cor)
|
|
{
|
|
u3_noun boz, len, dat;
|
|
|
|
if ( (c3n == u3r_mean(cor, u3x_sam_2, &boz,
|
|
u3x_sam_6, &len,
|
|
u3x_sam_7, &dat, 0)) ||
|
|
(c3n == u3ud(boz)) ||
|
|
(c3n == u3ud(len)) ||
|
|
(c3n == u3ud(dat)) )
|
|
{
|
|
return u3m_bail(c3__exit);
|
|
} else {
|
|
return u3qc_rev(boz, len, dat);
|
|
}
|
|
}
|
|
|
|
u3_noun
|
|
u3kc_rev(u3_atom boz,
|
|
u3_atom len,
|
|
u3_atom dat)
|
|
{
|
|
u3_noun res = u3qc_rev(boz, len, dat);
|
|
u3z(boz); u3z(len); u3z(dat);
|
|
return res;
|
|
}
|