1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/* GObject introspection: Virtual Function implementation
*
* Copyright (C) 2005 Matthias Clasen
* Copyright (C) 2008,2009 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include <glib.h>
#include <girepository.h>
#include "girepository-private.h"
#include "gitypelib-internal.h"
/**
* SECTION:givfuncinfo
* @Short_description: Struct representing a virtual function
* @Title: GIVFuncInfo
*
* GIVfuncInfo represents a virtual function. A property belongs to
* either a #GIObjectInfo or a #GIInterfaceInfo.
*
* <refsect1 id="gi-givfuncinfo.struct-hierarchy" role="struct_hierarchy">
* <title role="struct_hierarchy.title">Struct hierarchy</title>
* <synopsis>
* <link linkend="gi-GIBaseInfo">GIBaseInfo</link>
* +----<link linkend="gi-GICallableInfo">GICallableInfo</link>
* +----<link linkend="gi-GIFunctionInfo">GIFunctionInfo</link>
* +----<link linkend="gi-GISignalInfo">GISignalInfo</link>
* +----GIVFuncInfo
* </synopsis>
* </refsect1>
*/
GIVFuncInfo *
_g_base_info_find_vfunc (GIRealInfo *rinfo,
guint32 offset,
gint n_vfuncs,
const gchar *name)
{
/* FIXME hash */
Header *header = (Header *)rinfo->typelib->data;
gint i;
for (i = 0; i < n_vfuncs; i++)
{
VFuncBlob *fblob = (VFuncBlob *)&rinfo->typelib->data[offset];
const gchar *fname = (const gchar *)&rinfo->typelib->data[fblob->name];
if (strcmp (name, fname) == 0)
return (GIVFuncInfo *) g_info_new (GI_INFO_TYPE_VFUNC, (GIBaseInfo*) rinfo,
rinfo->typelib, offset);
offset += header->vfunc_blob_size;
}
return NULL;
}
/**
* g_vfunc_info_get_flags:
* @info: a #GIVFuncInfo
*
* Obtain the flags for this virtual function info. See #GIVFuncInfoFlags for
* more information about possible flag values.
*
* Returns: the flags
*/
GIVFuncInfoFlags
g_vfunc_info_get_flags (GIVFuncInfo *info)
{
GIVFuncInfoFlags flags;
GIRealInfo *rinfo = (GIRealInfo *)info;
VFuncBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_VFUNC_INFO (info), 0);
blob = (VFuncBlob *)&rinfo->typelib->data[rinfo->offset];
flags = 0;
if (blob->must_chain_up)
flags = flags | GI_VFUNC_MUST_CHAIN_UP;
if (blob->must_be_implemented)
flags = flags | GI_VFUNC_MUST_OVERRIDE;
if (blob->must_not_be_implemented)
flags = flags | GI_VFUNC_MUST_NOT_OVERRIDE;
return flags;
}
/**
* g_vfunc_info_get_offset:
* @info: a #GIVFuncInfo
*
* Obtain the offset of the function pointer in the class struct. The value
* 0xFFFF indicates that the struct offset is unknown.
*
* Returns: the struct offset or 0xFFFF if it's unknown
*/
gint
g_vfunc_info_get_offset (GIVFuncInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
VFuncBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_VFUNC_INFO (info), 0);
blob = (VFuncBlob *)&rinfo->typelib->data[rinfo->offset];
return blob->struct_offset;
}
/**
* g_vfunc_info_get_signal:
* @info: a #GIVFuncInfo
*
* Obtain the signal for the virtual function if one is set.
* The signal comes from the object or interface to which
* this virtual function belongs.
*
* Returns: (transfer full): the signal or %NULL if none set
*/
GISignalInfo *
g_vfunc_info_get_signal (GIVFuncInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
VFuncBlob *blob;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_VFUNC_INFO (info), 0);
blob = (VFuncBlob *)&rinfo->typelib->data[rinfo->offset];
if (blob->class_closure)
return g_interface_info_get_signal ((GIInterfaceInfo *)rinfo->container, blob->signal);
return NULL;
}
/**
* g_vfunc_info_get_invoker:
* @info: a #GIVFuncInfo
*
* If this virtual function has an associated invoker method, this
* method will return it. An invoker method is a C entry point.
*
* Not all virtuals will have invokers.
*
* Returns: (transfer full): the #GIVFuncInfo or %NULL. Free it with
* g_base_info_unref() when done.
*/
GIFunctionInfo *
g_vfunc_info_get_invoker (GIVFuncInfo *info)
{
GIRealInfo *rinfo = (GIRealInfo *)info;
VFuncBlob *blob;
GIBaseInfo *container;
GIInfoType parent_type;
g_return_val_if_fail (info != NULL, 0);
g_return_val_if_fail (GI_IS_VFUNC_INFO (info), 0);
blob = (VFuncBlob *)&rinfo->typelib->data[rinfo->offset];
/* 1023 = 0x3ff is the maximum of the 10 bits for invoker index */
if (blob->invoker == 1023)
return NULL;
container = rinfo->container;
parent_type = g_base_info_get_type (container);
if (parent_type == GI_INFO_TYPE_OBJECT)
return g_object_info_get_method ((GIObjectInfo*)container, blob->invoker);
else if (parent_type == GI_INFO_TYPE_INTERFACE)
return g_interface_info_get_method ((GIInterfaceInfo*)container, blob->invoker);
else
g_assert_not_reached ();
}
|
