XLbx.c revision e8a5466a 
1/*
2 * Copyright 1992 Network Computing Devices
3 *
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of NCD. not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission.  NCD. makes no representations about the
11 * suitability of this software for any purpose.  It is provided "as is"
12 * without express or implied warranty.
13 *
14 * NCD. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NCD.
16 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
18 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
19 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 *
21 * Author:  Keith Packard, Network Computing Devices
22 */
23
24#ifdef HAVE_CONFIG_H
25#include <config.h>
26#endif
27#include <stdio.h>
28#include <X11/Xlibint.h>
29#include <X11/extensions/XLbx.h>
30#include <X11/extensions/lbxproto.h>
31#include <X11/extensions/Xext.h>
32#include <X11/extensions/extutil.h>
33
34static XExtensionInfo _lbx_info_data;
35static XExtensionInfo *lbx_info = &_lbx_info_data;
36static /* const */ char *lbx_extension_name = LBXNAME;
37
38#define LbxCheckExtension(dpy,i,val) \
39  XextCheckExtension (dpy, i, lbx_extension_name, val)
40
41static int close_display(Display *dpy, XExtCodes *codes);
42static char *error_string(Display *dpy, int code, XExtCodes *codes,
43			  char *buf, int n);
44static /* const */ XExtensionHooks lbx_extension_hooks = {
45    NULL,				/* create_gc */
46    NULL,				/* copy_gc */
47    NULL,				/* flush_gc */
48    NULL,				/* free_gc */
49    NULL,				/* create_font */
50    NULL,				/* free_font */
51    close_display,			/* close_display */
52    NULL,				/* wire_to_event */
53    NULL,				/* event_to_wire */
54    NULL,				/* error */
55    error_string,			/* error_string */
56};
57
58static /* const */ char *lbx_error_list[] = {
59    "BadLbxClient",			/* BadLbxClient */
60};
61
62static XEXT_GENERATE_FIND_DISPLAY (find_display, lbx_info, lbx_extension_name,
63				   &lbx_extension_hooks, LbxNumberEvents, NULL)
64
65static XEXT_GENERATE_CLOSE_DISPLAY (close_display, lbx_info)
66
67static XEXT_GENERATE_ERROR_STRING (error_string, lbx_extension_name,
68				   LbxNumberErrors, lbx_error_list)
69
70
71Bool XLbxQueryExtension (
72    Display *dpy,
73    int *requestp, int *event_basep, int *error_basep)
74{
75    XExtDisplayInfo *info = find_display (dpy);
76
77    if (XextHasExtension(info)) {
78	*requestp = info->codes->major_opcode;
79	*event_basep = info->codes->first_event;
80	*error_basep = info->codes->first_error;
81	return True;
82    } else {
83	return False;
84    }
85}
86
87
88int XLbxGetEventBase(Display *dpy)
89{
90    XExtDisplayInfo *info = find_display (dpy);
91
92    if (XextHasExtension(info)) {
93	return info->codes->first_event;
94    } else {
95	return -1;
96    }
97}
98
99
100Bool XLbxQueryVersion(Display *dpy, int *majorVersion, int *minorVersion)
101{
102    XExtDisplayInfo *info = find_display (dpy);
103    xLbxQueryVersionReply rep;
104    register xLbxQueryVersionReq *req;
105
106    LbxCheckExtension (dpy, info, False);
107
108    LockDisplay(dpy);
109    GetReq(LbxQueryVersion, req);
110    req->reqType = info->codes->major_opcode;
111    req->lbxReqType = X_LbxQueryVersion;
112    if (!_XReply(dpy, (xReply *)&rep, 0, xFalse)) {
113	UnlockDisplay(dpy);
114	SyncHandle();
115	return False;
116    }
117    *majorVersion = rep.majorVersion;
118    *minorVersion = rep.minorVersion;
119    UnlockDisplay(dpy);
120    SyncHandle();
121    return True;
122}
123
124/* all other requests will run after Xlib has lost the wire ... */
125