3 (defun g-value-zero (g-value)
4 "Initializes the GValue in \"unset\" state.
6 @arg[g-value]{a C pointer to the GValue structure}"
8 for i from 0 below (foreign-type-size 'g-value)
9 do (setf (mem-ref g-value :uchar i) 0)))
11 (defun gvalue-type (gvalue)
12 (foreign-slot-value gvalue 'g-value :type))
14 (defmacro ev-case (keyform &body clauses)
15 "Macro that is an analogue of CASE except that it evaluates keyforms"
16 (let ((value (gensym)))
17 `(let ((,value ,keyform))
20 for (key . forms) in clauses
24 `((equalp ,key ,value) ,@forms)))))))
26 (defun parse-gvalue (gvalue)
27 "Parses the GValue structure and returns the corresponding Lisp object.
29 @arg[value]{a C pointer to the GValue structure}
30 @return{value contained in the GValue structure. Type of value depends on GValue type}"
31 (let* ((type (ensure-g-type (gvalue-type gvalue)))
32 (fundamental-type (ensure-g-type (g-type-fundamental type))))
34 ((= type (ensure-g-type (g-strv-get-type))) (convert-from-foreign (g-value-get-boxed gvalue) '(glib:gstrv :free-from-foreign nil)))
35 (t (ev-case fundamental-type
36 (+g-type-invalid+ (error "GValue is of invalid type (~A)" (g-type-name type)))
38 (+g-type-char+ (g-value-get-char gvalue))
39 (+g-type-uchar+ (g-value-get-uchar gvalue))
40 (+g-type-boolean+ (g-value-get-boolean gvalue))
41 (+g-type-int+ (g-value-get-int gvalue))
42 (+g-type-uint+ (g-value-get-uint gvalue))
43 (+g-type-long+ (g-value-get-long gvalue))
44 (+g-type-ulong+ (g-value-get-ulong gvalue))
45 (+g-type-int64+ (g-value-get-int64 gvalue))
46 (+g-type-uint64+ (g-value-get-uint64 gvalue))
47 (+g-type-enum+ (parse-gvalue-enum gvalue))
48 (+g-type-flags+ (parse-gvalue-flags gvalue))
49 (+g-type-float+ (g-value-get-float gvalue))
50 (+g-type-double+ (g-value-get-double gvalue))
51 (+g-type-string+ (g-value-get-string gvalue))
52 (+g-type-pointer+ (g-value-get-pointer gvalue))
53 (+g-type-boxed+ (parse-gvalue-boxed gvalue))
54 (+g-type-param+ (parse-g-param-spec (g-value-get-param gvalue)))
55 (+g-type-object+ (parse-gvalue-object gvalue))
56 (+g-type-interface+ (parse-gvalue-object gvalue))
57 (t (error "Unknown type: ~A (~A)" type (g-type-name type))))))))
59 (defun set-g-value (gvalue value type &key zero-g-value unset-g-value (g-value-init t))
60 "Assigns the GValue structure @code{gvalue} the value @code{value} of GType @code{type}.
62 @arg[gvalue]{a C pointer to the GValue structure}
63 @arg[value]{a Lisp object that is to be assigned}
64 @arg[type]{a GType that is to be assigned}
65 @arg[zero-g-value]{a boolean specifying whether GValue should be zero-initialized before assigning. See @fun{g-value-zero}}
66 @arg[unset-g-value]{a boolean specifying whether GValue should be \"unset\" before assigning. See @fun{g-value-unset}. The \"true\" value should not be passed to both @code{zero-g-value} and @code{unset-g-value} arguments}
67 @arg[g-value-init]{a boolean specifying where GValue should be initialized}"
68 (setf type (ensure-g-type type))
70 (zero-g-value (g-value-zero gvalue))
71 (unset-g-value (g-value-unset gvalue)))
72 (when g-value-init (g-value-init gvalue type))
73 (let ((fundamental-type (ensure-g-type (g-type-fundamental type))))
75 ((= type (ensure-g-type (g-strv-get-type))) (g-value-set-boxed gvalue (convert-to-foreign value 'glib:gstrv)))
76 (t (ev-case fundamental-type
77 (+g-type-invalid+ (error "Invalid type (~A)" type))
79 (+g-type-char+ (g-value-set-char gvalue value))
80 (+g-type-uchar+ (g-value-set-uchar gvalue value))
81 (+g-type-boolean+ (g-value-set-boolean gvalue value))
82 (+g-type-int+ (g-value-set-int gvalue value))
83 (+g-type-uint+ (g-value-set-uint gvalue value))
84 (+g-type-long+ (g-value-set-long gvalue value))
85 (+g-type-ulong+ (g-value-set-ulong gvalue value))
86 (+g-type-int64+ (g-value-set-int64 gvalue value))
87 (+g-type-uint64+ (g-value-set-uint64 gvalue value))
88 (+g-type-enum+ (set-gvalue-enum gvalue value))
89 (+g-type-flags+ (set-gvalue-flags gvalue value))
90 (+g-type-float+ (unless (realp value) (error "~A is not a real number" value)) (g-value-set-float gvalue (coerce value 'single-float)))
91 (+g-type-double+ (unless (realp value) (error "~A is not a real number" value)) (g-value-set-double gvalue (coerce value 'double-float)))
92 (+g-type-string+ (g-value-set-string gvalue value))
93 (+g-type-pointer+ (g-value-set-pointer gvalue value))
94 (+g-type-boxed+ (set-gvalue-boxed gvalue value))
95 ;(+g-type-param+ (set-gvalue-param gvalue value))
96 (+g-type-object+ (set-gvalue-object gvalue value))
97 (+g-type-interface+ (set-gvalue-object gvalue value))
98 (t (error "Unknown type: ~A (~A)" type (g-type-name type))))))))
102 (defvar *registered-enum-types* (make-hash-table :test 'equal))
103 (defun register-enum-type (name type)
104 (setf (gethash name *registered-enum-types*) type))
105 (defun registered-enum-type (name)
106 (gethash name *registered-enum-types*))
108 (defun parse-gvalue-enum (gvalue)
109 (let* ((g-type (gvalue-type gvalue))
110 (type-name (g-type-name g-type))
111 (enum-type (registered-enum-type type-name)))
113 (error "Enum ~A is not registered" type-name))
114 (convert-from-foreign (g-value-get-enum gvalue) enum-type)))
116 (defun set-gvalue-enum (gvalue value)
117 (let* ((g-type (gvalue-type gvalue))
118 (type-name (g-type-name g-type))
119 (enum-type (registered-enum-type type-name)))
121 (error "Enum ~A is not registered" type-name))
122 (g-value-set-enum gvalue (convert-to-foreign value enum-type))))
127 (defvar *registered-flags-types* (make-hash-table :test 'equal))
128 (defun register-flags-type (name type)
129 (setf (gethash name *registered-flags-types*) type))
130 (defun registered-flags-type (name)
131 (gethash name *registered-flags-types*))
133 (defun parse-gvalue-flags (gvalue)
134 (let* ((g-type (gvalue-type gvalue))
135 (type-name (g-type-name g-type))
136 (flags-type (registered-flags-type type-name)))
138 (error "Flags ~A is not registered" type-name))
139 (convert-from-foreign (g-value-get-flags gvalue) flags-type)))
141 (defun set-gvalue-flags (gvalue value)
142 (let* ((g-type (gvalue-type gvalue))
143 (type-name (g-type-name g-type))
144 (flags-type (registered-flags-type type-name)))
146 (error "Flags ~A is not registered" type-name))
147 (g-value-set-flags gvalue (convert-to-foreign value flags-type))))
151 (defun parse-gvalue-object (gvalue)
152 (get-g-object-for-pointer (g-value-get-object gvalue)))
154 (defun set-gvalue-object (gvalue value)
155 (g-value-set-object gvalue (if value (pointer value) (null-pointer))))