65 lines
1.9 KiB
Factor
65 lines
1.9 KiB
Factor
! Copyright (C) 2004, 2006 Slava Pestov.
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! See http://factorcode.org/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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: parse-c-decl ( string -- count name )
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"[]" split "" swap remove unclip
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>r
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dup empty? [ drop 1 ] [ [ string>number ] map product ] if
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r> over 1 > [ "[]" append ] when ;
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: define-field ( offset type name -- offset )
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>r parse-c-decl [ c-type c-type-align ] keep
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>r swapd align r> r>
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"struct-name" get swap "-" swap 3append
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3dup define-getter 3dup define-setter
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drop c-size rot * + ;
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: define-member ( max type -- max )
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c-size max ;
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TUPLE: struct-type ;
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M: struct-type c-type-unbox c-type-size %unbox-struct ;
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M: struct-type c-type-box c-type-size %box-struct ;
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C: struct-type ( width -- type )
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<c-type> over set-delegate
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bootstrap-cell over set-c-type-align
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[ swap <displaced-alien> ] over set-c-type-getter
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[ set-c-type-size ] keep ;
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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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<struct-type> "struct-name" get in get define-c-type ;
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: c-struct? ( type -- ? ) c-types get hash struct-type? ;
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