56 lines
1.7 KiB
Factor
56 lines
1.7 KiB
Factor
! Copyright (C) 2004, 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: alien
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USING: assembler compiler errors generic
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hashtables kernel kernel-internals math namespaces parser
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sequences strings words ;
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! Some code for interfacing with C structures.
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: c-getter* ( name -- quot )
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c-getter [
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[ "Cannot read struct fields with type" throw ]
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] unless* ;
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: define-getter ( offset type name -- )
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#! Define a word with stack effect ( alien -- obj ) in the
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#! current 'in' vocabulary.
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create-in >r c-getter* swap add* r> swap define-compound ;
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: c-setter* ( name -- quot )
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c-setter [
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[ "Cannot write struct fields with type" throw ]
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] unless* ;
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: define-setter ( offset type name -- )
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#! Define a word with stack effect ( obj alien -- ) in the
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#! current 'in' vocabulary.
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"set-" swap append create-in >r c-setter* swap add* r>
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swap define-compound ;
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: define-field ( offset type name -- offset )
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>r dup >r c-align align r> r>
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"struct-name" get swap "-" swap append3
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( offset type name -- )
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3dup define-getter 3dup define-setter
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drop c-size + ;
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: define-member ( max type -- max )
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c-size max ;
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: define-struct-type ( width -- )
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#! Define inline and pointer type for the struct. Pointer
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#! type is exactly like void*.
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[
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"width" set
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bootstrap-cell "align" set
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[ swap <displaced-alien> ] "getter" set
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"width" get [ nip %unbox-struct ] curry "unboxer" set
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"width" get [ nip %box-struct ] curry "boxer" set
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"struct" on
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] "struct-name" get define-c-type
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"struct-name" get in get init-c-type ;
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: c-struct? ( type -- ? )
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c-types get hash [ "struct" swap hash ] [ f ] if* ;
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