XLbx.c revision caade7cc 
1/*
2 * $Xorg: XLbx.c,v 1.3 2000/08/17 19:45:51 cpqbld Exp $
3 *
4 * Copyright 1992 Network Computing Devices
5 *
6 * Permission to use, copy, modify, distribute, and sell this software and its
7 * documentation for any purpose is hereby granted without fee, provided that
8 * the above copyright notice appear in all copies and that both that
9 * copyright notice and this permission notice appear in supporting
10 * documentation, and that the name of NCD. not be used in advertising or
11 * publicity pertaining to distribution of the software without specific,
12 * written prior permission.  NCD. makes no representations about the
13 * suitability of this software for any purpose.  It is provided "as is"
14 * without express or implied warranty.
15 *
16 * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD.
18 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
20 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
21 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 *
23 * Author:  Keith Packard, Network Computing Devices
24 */
25/* $XFree86: xc/lib/Xext/XLbx.c,v 1.4 2002/10/16 00:37:27 dawes Exp $ */
26
27#define NEED_EVENTS
28#define NEED_REPLIES
29#ifdef HAVE_CONFIG_H
30#include <config.h>
31#endif
32#include <stdio.h>
33#include <X11/Xlibint.h>
34#include <X11/extensions/XLbx.h>
35#include <X11/extensions/lbxstr.h>
36#include <X11/extensions/Xext.h>
37#include <X11/extensions/extutil.h>
38
39static XExtensionInfo _lbx_info_data;
40static XExtensionInfo *lbx_info = &_lbx_info_data;
41static /* const */ char *lbx_extension_name = LBXNAME;
42
43#define LbxCheckExtension(dpy,i,val) \
44  XextCheckExtension (dpy, i, lbx_extension_name, val)
45
46static int close_display(Display *dpy, XExtCodes *codes);
47static char *error_string(Display *dpy, int code, XExtCodes *codes,
48			  char *buf, int n);
49static /* const */ XExtensionHooks lbx_extension_hooks = {
50    NULL,				/* create_gc */
51    NULL,				/* copy_gc */
52    NULL,				/* flush_gc */
53    NULL,				/* free_gc */
54    NULL,				/* create_font */
55    NULL,				/* free_font */
56    close_display,			/* close_display */
57    NULL,				/* wire_to_event */
58    NULL,				/* event_to_wire */
59    NULL,				/* error */
60    error_string,			/* error_string */
61};
62
63static /* const */ char *lbx_error_list[] = {
64    "BadLbxClient",			/* BadLbxClient */
65};
66
67static XEXT_GENERATE_FIND_DISPLAY (find_display, lbx_info, lbx_extension_name,
68				   &lbx_extension_hooks, LbxNumberEvents, NULL)
69
70static XEXT_GENERATE_CLOSE_DISPLAY (close_display, lbx_info)
71
72static XEXT_GENERATE_ERROR_STRING (error_string, lbx_extension_name,
73				   LbxNumberErrors, lbx_error_list)
74
75
76Bool XLbxQueryExtension (
77    Display *dpy,
78    int *requestp, int *event_basep, int *error_basep)
79{
80    XExtDisplayInfo *info = find_display (dpy);
81
82    if (XextHasExtension(info)) {
83	*requestp = info->codes->major_opcode;
84	*event_basep = info->codes->first_event;
85	*error_basep = info->codes->first_error;
86	return True;
87    } else {
88	return False;
89    }
90}
91
92
93int XLbxGetEventBase(Display *dpy)
94{
95    XExtDisplayInfo *info = find_display (dpy);
96
97    if (XextHasExtension(info)) {
98	return info->codes->first_event;
99    } else {
100	return -1;
101    }
102}
103
104
105Bool XLbxQueryVersion(Display *dpy, int *majorVersion, int *minorVersion)
106{
107    XExtDisplayInfo *info = find_display (dpy);
108    xLbxQueryVersionReply rep;
109    register xLbxQueryVersionReq *req;
110
111    LbxCheckExtension (dpy, info, False);
112
113    LockDisplay(dpy);
114    GetReq(LbxQueryVersion, req);
115    req->reqType = info->codes->major_opcode;
116    req->lbxReqType = X_LbxQueryVersion;
117    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
118	UnlockDisplay(dpy);
119	SyncHandle();
120	return False;
121    }
122    *majorVersion = rep.majorVersion;
123    *minorVersion = rep.minorVersion;
124    UnlockDisplay(dpy);
125    SyncHandle();
126    return True;
127}
128
129/* all other requests will run after Xlib has lost the wire ... */
130