shrub/j/2/snag.c

46 lines
774 B
C
Raw Normal View History

2013-09-29 00:21:18 +04:00
/* j/2/snag.c
**
** This file is in the public domain.
*/
#include "all.h"
2014-09-04 07:10:43 +04:00
2013-09-29 00:21:18 +04:00
/* functions
*/
2014-09-06 00:13:24 +04:00
u3_noun
u3_cqb_snag(u3_atom a,
u3_noun b)
2013-09-29 00:21:18 +04:00
{
2014-11-06 03:20:01 +03:00
if ( !_(u3a_is_cat(a)) ) {
return u3m_bail(c3__fail);
2013-09-29 00:21:18 +04:00
}
else {
c3_w len_w = a;
while ( len_w ) {
2014-11-05 04:18:47 +03:00
if ( c3n == u3du(b) ) {
2014-11-06 03:20:01 +03:00
return u3m_bail(c3__exit);
2013-09-29 00:21:18 +04:00
}
2014-09-06 00:13:24 +04:00
b = u3t(b);
2013-09-29 00:21:18 +04:00
len_w--;
}
2014-11-05 04:18:47 +03:00
if ( c3n == u3du(b) ) {
2014-11-06 03:20:01 +03:00
return u3m_bail(c3__exit);
2013-09-29 00:21:18 +04:00
}
2014-09-06 00:13:24 +04:00
return u3k(u3h(b));
2013-09-29 00:21:18 +04:00
}
}
2014-09-06 00:13:24 +04:00
u3_noun
u3_cwb_snag(u3_noun cor)
2013-09-29 00:21:18 +04:00
{
2014-09-06 00:13:24 +04:00
u3_noun a, b;
2013-09-29 00:21:18 +04:00
2014-11-06 03:20:01 +03:00
if ( (c3n == u3r_mean(cor, u3v_sam_2, &a, u3v_sam_3, &b, 0)) ||
2014-11-05 04:18:47 +03:00
(c3n == u3ud(a)) )
2013-09-29 00:21:18 +04:00
{
2014-11-06 03:20:01 +03:00
return u3m_bail(c3__exit);
2013-09-29 00:21:18 +04:00
} else {
2014-09-06 00:13:24 +04:00
return u3_cqb_snag(a, b);
2013-09-29 00:21:18 +04:00
}
}