factor/library/kernel.factor

103 lines
2.3 KiB
Factor

! Copyright (C) 2004, 2006 Slava Pestov.
! See http://factor.sf.net/license.txt for BSD license.
IN: kernel
USING: generic kernel-internals math-internals ;
: 2swap ( x y z t -- z t x y ) rot >r rot r> ; inline
: clear V{ } set-datastack ;
GENERIC: hashcode ( obj -- n ) flushable
M: object hashcode drop 0 ;
GENERIC: hashcode* ( n obj -- n ) flushable
M: object hashcode* nip hashcode ;
GENERIC: = ( obj obj -- ? ) flushable
M: object = eq? ;
GENERIC: <=> ( obj1 obj2 -- n ) flushable
GENERIC: clone ( obj -- obj ) flushable
M: object clone ;
: set-boot ( quot -- ) 8 setenv ;
: num-types ( -- n ) 19 ; inline
: ? ( cond t f -- t/f ) rot [ drop ] [ nip ] if ; inline
: >boolean t f ? ; inline
: and ( a b -- a&b ) f ? ; inline
: or ( a b -- a|b ) t swap ? ; inline
: cpu ( -- arch ) 7 getenv ;
: os ( -- os ) 11 getenv ;
: windows? ( -- ? ) os "win32" = ;
: macosx? os "macosx" = ;
: slip >r call r> ; inline
: 2slip >r >r call r> r> ; inline
: keep over >r call r> ; inline
: 2keep over >r pick >r call r> r> ; inline
: 3keep >r 3dup r> swap >r swap >r swap >r call r> r> r> ;
inline
: 2apply tuck 2slip call ; inline
: if* pick [ drop call ] [ 2nip call ] if ; inline
: ?if >r >r [ nip r> r> drop call ] [ r> drop r> call ] if* ;
inline
: unless [ ] swap if ; inline
: unless* over [ drop ] [ nip call ] if ; inline
: when [ ] if ; inline
: when* dupd [ drop ] if ; inline
: with ( obj quot elt -- obj quot )
pick pick >r >r swap call r> r> ; inline
: keep-datastack datastack slip set-datastack drop ; inline
M: wrapper =
over wrapper? [ [ wrapped ] 2apply = ] [ 2drop f ] if ;
GENERIC: literalize ( obj -- obj )
M: object literalize ;
M: wrapper literalize <wrapper> ;
IN: kernel-internals
! These words are unsafe. Don't use them.
: array-capacity 1 slot ; inline
: array-nth swap 2 fixnum+ slot ; inline
: set-array-nth swap 2 fixnum+ set-slot ; inline
: make-tuple <tuple> [ 2 set-slot ] keep ; flushable
! Some runtime implementation details
: tag-mask BIN: 111 ; inline
: num-tags 8 ; inline
: tag-bits 3 ; inline
: fixnum-tag BIN: 000 ; inline
: bignum-tag BIN: 001 ; inline
: cons-tag BIN: 010 ; inline
: object-tag BIN: 011 ; inline
: ratio-tag BIN: 100 ; inline
: float-tag BIN: 101 ; inline
: complex-tag BIN: 110 ; inline
: cell 17 getenv ; foldable