libXext-1.0.2/src/XLbx.c

   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
  39 static XExtensionInfo _lbx_info_data;
  40 static XExtensionInfo *lbx_info = &_lbx_info_data;
  41 static /* const */ char *lbx_extension_name = LBXNAME;
  42
  43 #define LbxCheckExtension(dpy,i,val) \
  44   XextCheckExtension (dpy, i, lbx_extension_name, val)
  45
  46 static int close_display(Display *dpy, XExtCodes *codes);
  47 static char *error_string(Display *dpy, int code, XExtCodes *codes,
  48                           char *buf, int n);
  49 static /* 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
  63 static /* const */ char *lbx_error_list[] = {
  64     "BadLbxClient",                     /* BadLbxClient */
  65 };
  66
  67 static XEXT_GENERATE_FIND_DISPLAY (find_display, lbx_info, lbx_extension_name,
  68                                    &lbx_extension_hooks, LbxNumberEvents, NULL)
  69
  70 static XEXT_GENERATE_CLOSE_DISPLAY (close_display, lbx_info)
  71
  72 static XEXT_GENERATE_ERROR_STRING (error_string, lbx_extension_name,
  73                                    LbxNumberErrors, lbx_error_list)
  74
  75
  76 Bool 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
  93 int 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
 105 Bool 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 ... */