PRIVATE>
+: recursive-hashcode ( n obj quot -- code )
+ pick 0 <= [ 3drop 0 ] [ [ 1 - ] 2dip call ] if ; inline
+
ERROR: log2-expects-positive x ;
: log2 ( x -- n )
: unless-zero ( ... n quot: ( ... n -- ... ) -- ... ) [ ] swap if-zero ; inline
+: until-zero ( ... n quot: ( ... x -- ... y ) -- ... ) [ dup zero? ] swap until drop ; inline
+
UNION: integer fixnum bignum ;
TUPLE: ratio
: align ( m w -- n )
1 - [ + ] keep bitnot bitand ; inline
-<PRIVATE
-
-: iterate-prep ( n quot -- i n quot ) [ 0 ] 2dip ; inline
-
-: if-iterate? ( i n true false -- ) [ 2over < ] 2dip if ; inline
-
-: iterate-step ( i n quot -- i n quot )
- ! Apply quot to i, keep i and quot, hide n.
- [ nip call ] 3keep ; inline
-
-: iterate-rot ( ? i n quot -- i n quot ? )
- [ rot ] dip swap ; inline
-
-: iterate-next ( i n quot -- i' n quot ) [ 1 + ] 2dip ; inline
-
-PRIVATE>
-
-: (each-integer) ( ... i n quot: ( ... i -- ... ) -- ... )
- [ iterate-step iterate-next (each-integer) ]
- [ 3drop ] if-iterate? ; inline recursive
-
-: (find-integer) ( ... i n quot: ( ... i -- ... ? ) -- ... i/f )
- [
- iterate-step iterate-rot
- [ 2drop ] [ iterate-next (find-integer) ] if
- ] [ 3drop f ] if-iterate? ; inline recursive
-
-: (all-integers?) ( ... i n quot: ( ... i -- ... ? ) -- ... ? )
- [
- iterate-step iterate-rot
- [ iterate-next (all-integers?) ] [ 3drop f ] if
- ] [ 3drop t ] if-iterate? ; inline recursive
+: each-integer-from ( ... i n quot: ( ... i -- ... ) -- ... )
+ 2over < [
+ [ nip call ] 3keep
+ [ 1 + ] 2dip each-integer-from
+ ] [
+ 3drop
+ ] if ; inline recursive
: each-integer ( ... n quot: ( ... i -- ... ) -- ... )
- iterate-prep (each-integer) ; inline
+ [ 0 ] 2dip each-integer-from ; inline
: times ( ... n quot: ( ... -- ... ) -- ... )
[ drop ] prepose each-integer ; inline
-: find-integer ( ... n quot: ( ... i -- ... ? ) -- ... i/f )
- iterate-prep (find-integer) ; inline
+: find-integer-from ( ... i n quot: ( ... i -- ... ? ) -- ... i/f )
+ 2over < [
+ [ nip call ] 3keep roll
+ [ 2drop ]
+ [ [ 1 + ] 2dip find-integer-from ] if
+ ] [
+ 3drop f
+ ] if ; inline recursive
-: all-integers? ( ... n quot: ( ... i -- ... ? ) -- ... ? )
- iterate-prep (all-integers?) ; inline
+: find-integer ( ... n quot: ( ... i -- ... ? ) -- ... i/f )
+ [ 0 ] 2dip find-integer-from ; inline
: find-last-integer ( ... n quot: ( ... i -- ... ? ) -- ... i/f )
over 0 < [
[ 1 - ] dip find-last-integer
] if
] if ; inline recursive
+
+: all-integers-from? ( ... i n quot: ( ... i -- ... ? ) -- ... ? )
+ 2over < [
+ [ nip call ] 3keep roll
+ [ [ 1 + ] 2dip all-integers-from? ]
+ [ 3drop f ] if
+ ] [
+ 3drop t
+ ] if ; inline recursive
+
+: all-integers? ( ... n quot: ( ... i -- ... ? ) -- ... ? )
+ [ 0 ] 2dip all-integers-from? ; inline