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123 lines
4.3 KiB
C
123 lines
4.3 KiB
C
/* $Xorg: XpExtVer.c,v 1.4 2000/08/17 19:46:07 cpqbld Exp $ */
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/******************************************************************************
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******************************************************************************
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**
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** (c) Copyright 1996 Hewlett-Packard Company
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** (c) Copyright 1996 International Business Machines Corp.
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** (c) Copyright 1996 Sun Microsystems, Inc.
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** (c) Copyright 1996 Novell, Inc.
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** (c) Copyright 1996 Digital Equipment Corp.
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** (c) Copyright 1996 Fujitsu Limited
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** (c) Copyright 1996 Hitachi, Ltd.
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**
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** Permission is hereby granted, free of charge, to any person obtaining a copy
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** of this software and associated documentation files (the "Software"), to deal
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** in the Software without restriction, including without limitation the rights
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** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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** copies of the Software, and to permit persons to whom the Software is
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** furnished to do so, subject to the following conditions:
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**
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** The above copyright notice and this permission notice shall be included in
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** all copies or substantial portions of the Software.
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**
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** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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** COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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** IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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** CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**
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** Except as contained in this notice, the names of the copyright holders shall
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** not be used in advertising or otherwise to promote the sale, use or other
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** dealings in this Software without prior written authorization from said
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** copyright holders.
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**
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******************************************************************************
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*****************************************************************************/
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/* $XFree86: xc/lib/Xp/XpExtVer.c,v 1.6 2003/11/21 05:13:21 dawes Exp $ */
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#define NEED_REPLIES
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#include <X11/extensions/Printstr.h>
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#include <X11/Xlibint.h>
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#include "XpExtUtil.h"
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Bool
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XpQueryExtension (
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Display *dpy,
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int *event_base_return, /* return value */
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int *error_base_return /* return value */
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)
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{
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XExtDisplayInfo *info = (XExtDisplayInfo *) xp_find_display (dpy);
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if (XextHasExtension (info)) {
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*event_base_return = info->codes->first_event;
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*error_base_return = info->codes->first_error;
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return True;
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} else {
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return False;
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}
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}
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/* Prototype for |XpCheckExtInitUnlocked()|
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* See XpExtUtil.c - same as |XpCheckExtInit()| but does not obtain the Xlib global lock */
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extern int XpCheckExtInitUnlocked(
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register Display *dpy,
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register int version_index
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);
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Status
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XpQueryVersion (
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Display *dpy,
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short *major_version,
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short *minor_version
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)
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{
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xPrintQueryVersionReq *req;
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xPrintQueryVersionReply rep;
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XExtDisplayInfo *info = (XExtDisplayInfo *) xp_find_display (dpy);
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/*
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* Note: many extensions treat major and minor as "ints", but
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* protocol wise and internal wise, they're shorts.
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*/
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*major_version = 0;
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*minor_version = 0;
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#ifdef Would_Need_xpPrintData_Struct_Def
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/*
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* We may already have the answer cached from a previous query.
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*/
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if (( info->data ) && ( ((xpPrintData *) info->data)->vers->present )) {
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*major_version = ((xpPrintData *) info->data)->vers->major_version ;
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*minor_version = ((xpPrintData *) info->data)->vers->minor_version ;
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return (/* non-zero indicates extension present */ True);
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}
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#endif /* Would_Need_xpPrintData_Struct_Def */
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if (XpCheckExtInitUnlocked(dpy, XP_DONT_CHECK) == -1)
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return (/* No such extension */ False);
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LockDisplay (dpy);
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GetReq(PrintQueryVersion,req);
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req->reqType = info->codes->major_opcode;
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req->printReqType = X_PrintQueryVersion;
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if (! _XReply (dpy, (xReply *) &rep, 0, xTrue)) {
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UnlockDisplay(dpy);
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SyncHandle();
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return(/* No such extension */ False);
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}
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*major_version = rep.majorVersion;
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*minor_version = rep.minorVersion;
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UnlockDisplay(dpy);
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SyncHandle();
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return (/* non-zero indicates extension present */ True);
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}
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