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77 lines
2.6 KiB
Scheme
77 lines
2.6 KiB
Scheme
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;;;************************************************************************
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;;;*common.scm
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;;;*
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;;;* This file contains generic SWIG GOOPS classes for generated
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;;;* GOOPS file support
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;;;*
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;;;* Copyright (C) 2003 John Lenz (jelenz@wisc.edu)
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;;;* Copyright (C) 2004 Matthias Koeppe (mkoeppe@mail.math.uni-magdeburg.de)
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;;;*
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;;;* This file may be freely redistributed without license or fee provided
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;;;* this copyright message remains intact.
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;;;************************************************************************
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(define-module (Swig swigrun))
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(define-module (Swig common)
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#:use-module (oop goops)
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#:use-module (Swig swigrun))
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(define-class <swig-metaclass> (<class>)
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(new-function #:init-value #f))
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(define-method (initialize (class <swig-metaclass>) initargs)
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(slot-set! class 'new-function (get-keyword #:new-function initargs #f))
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(next-method))
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(define-class <swig> ()
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(swig-smob #:init-value #f)
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#:metaclass <swig-metaclass>
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)
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(define-method (initialize (obj <swig>) initargs)
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(next-method)
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(slot-set! obj 'swig-smob
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(let ((arg (get-keyword #:init-smob initargs #f)))
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(if arg
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arg
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(let ((ret (apply (slot-ref (class-of obj) 'new-function) (get-keyword #:args initargs '()))))
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;; if the class is registered with runtime environment,
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;; new-Function will return a <swig> goops class. In that case, extract the smob
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;; from that goops class and set it as the current smob.
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(if (slot-exists? ret 'swig-smob)
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(slot-ref ret 'swig-smob)
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ret))))))
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(define (display-address o file)
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(display (number->string (object-address o) 16) file))
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(define (display-pointer-address o file)
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;; Don't fail if the function SWIG-PointerAddress is not present.
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(let ((address (false-if-exception (SWIG-PointerAddress o))))
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(if address
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(begin
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(display " @ " file)
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(display (number->string address 16) file)))))
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(define-method (write (o <swig>) file)
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;; We display _two_ addresses to show the object's identity:
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;; * first the address of the GOOPS proxy object,
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;; * second the pointer address.
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;; The reason is that proxy objects are created and discarded on the
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;; fly, so different proxy objects for the same C object will appear.
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(let ((class (class-of o)))
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(if (slot-bound? class 'name)
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(begin
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(display "#<" file)
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(display (class-name class) file)
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(display #\space file)
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(display-address o file)
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(display-pointer-address o file)
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(display ">" file))
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(next-method))))
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(export <swig-metaclass> <swig>)
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;;; common.scm ends here
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