extnsionst.h revision 05b261ec 
1/***********************************************************
2
3Copyright 1987, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25
26Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
27
28                        All Rights Reserved
29
30Permission to use, copy, modify, and distribute this software and its
31documentation for any purpose and without fee is hereby granted,
32provided that the above copyright notice appear in all copies and that
33both that copyright notice and this permission notice appear in
34supporting documentation, and that the name of Digital not be
35used in advertising or publicity pertaining to distribution of the
36software without specific, written prior permission.
37
38DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
39ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
40DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
41ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
42WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
43ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
44SOFTWARE.
45
46******************************************************************/
47
48#ifndef EXTENSIONSTRUCT_H
49#define EXTENSIONSTRUCT_H
50
51#include "dix.h"
52#include "misc.h"
53#include "screenint.h"
54#include "extension.h"
55#include "gc.h"
56
57typedef struct _ExtensionEntry {
58    int index;
59    void (* CloseDown)(	/* called at server shutdown */
60	struct _ExtensionEntry * /* extension */);
61    char *name;               /* extension name */
62    int base;                 /* base request number */
63    int eventBase;
64    int eventLast;
65    int errorBase;
66    int errorLast;
67    int num_aliases;
68    char **aliases;
69    pointer extPrivate;
70    unsigned short (* MinorOpcode)(	/* called for errors */
71	ClientPtr /* client */);
72    DevUnion *devPrivates;
73} ExtensionEntry;
74
75/*
76 * The arguments may be different for extension event swapping functions.
77 * Deal with this by casting when initializing the event's EventSwapVector[]
78 * entries.
79 */
80typedef void (*EventSwapPtr) (xEvent *, xEvent *);
81
82extern EventSwapPtr EventSwapVector[128];
83
84extern void NotImplemented (	/* FIXME: this may move to another file... */
85	xEvent *,
86	xEvent *);
87
88#define    SetGCVector(pGC, VectorElement, NewRoutineAddress, Atom)    \
89    pGC->VectorElement = NewRoutineAddress;
90
91#define    GetGCValue(pGC, GCElement)    (pGC->GCElement)
92
93extern ExtensionEntry *AddExtension(
94    char* /*name*/,
95    int /*NumEvents*/,
96    int /*NumErrors*/,
97    int (* /*MainProc*/)(ClientPtr /*client*/),
98    int (* /*SwappedMainProc*/)(ClientPtr /*client*/),
99    void (* /*CloseDownProc*/)(ExtensionEntry * /*extension*/),
100    unsigned short (* /*MinorOpcodeProc*/)(ClientPtr /*client*/)
101);
102
103extern Bool AddExtensionAlias(
104    char* /*alias*/,
105    ExtensionEntry * /*extension*/);
106
107extern ExtensionEntry *CheckExtension(const char *extname);
108extern ExtensionEntry *GetExtensionEntry(int major);
109
110extern void DeclareExtensionSecurity(
111    char * /*extname*/,
112    Bool /*secure*/);
113
114#endif /* EXTENSIONSTRUCT_H */
115
116