factor/library/alien/structs.factor

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! Copyright (C) 2004, 2005 Slava Pestov.
! See http://factor.sf.net/license.txt for BSD license.
IN: alien
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USING: assembler compiler errors generic hashtables kernel lists
math namespaces parser sequences strings words ;
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! Some code for interfacing with C structures.
: define-getter ( offset type name -- )
#! Define a word with stack effect ( alien -- obj ) in the
#! current 'in' vocabulary.
create-in >r
[ "getter" get ] bind cons r> swap define-compound ;
: define-setter ( offset type name -- )
#! Define a word with stack effect ( obj alien -- ) in the
#! current 'in' vocabulary.
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"set-" swap append create-in >r
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[ "setter" get ] bind cons r> swap define-compound ;
: define-field ( offset type name -- offset )
>r c-type dup >r [ "align" get ] bind align r> r>
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"struct-name" get swap "-" swap append3
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( offset type name -- )
3dup define-getter 3dup define-setter
drop [ "width" get ] bind + ;
: define-member ( max type -- max )
c-type [ "width" get ] bind max ;
: define-struct-type ( width -- )
#! Define inline and pointer type for the struct. Pointer
#! type is exactly like void*.
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[
"width" set
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cell "align" set
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[ swap <displaced-alien> ] "getter" set
]
"struct-name" get define-c-type
"struct-name" get "in" get init-c-type ;