xserver-multidpi/Xi/queryversion.c
Peter Hutterer 6ea76c5504 Xi: reply with the XI2 version that is supported by both client and server.
XIQueryVersion must return the client's version if the client's version is
lower than or equal to the server's version, or the server's version
otherwise.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2009-06-04 15:11:07 +10:00

111 lines
3.0 KiB
C

/*
* Copyright © 2009 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Authors: Peter Hutterer
*
*/
/**
* @file queryversion.c
* Protocol handling for the XIQueryVersion request/reply.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "inputstr.h"
#include <X11/Xmd.h>
#include <X11/X.h>
#include <X11/extensions/XI2proto.h>
#include "exglobals.h"
#include "exevents.h"
#include "queryversion.h"
#include "misc.h"
extern XExtensionVersion XIVersion; /* defined in getvers.c */
/**
* Return the supported XI version.
*
* Saves the version the client claims to support as well, for future
* reference.
*/
int
ProcXIQueryVersion(ClientPtr client)
{
xXIQueryVersionReply rep;
XIClientPtr pXIClient;
int major, minor;
REQUEST(xXIQueryVersionReq);
REQUEST_SIZE_MATCH(xXIQueryVersionReq);
pXIClient = dixLookupPrivate(&client->devPrivates, XIClientPrivateKey);
major = min(XIVersion.major_version, stuff->major_version);
minor = min(XIVersion.minor_version, stuff->minor_version);
pXIClient->major_version = major;
pXIClient->minor_version = minor;
memset(&rep, 0, sizeof(xXIQueryVersionReply));
rep.repType = X_Reply;
rep.RepType = X_XIQueryVersion;
rep.length = 0;
rep.sequenceNumber = client->sequence;
rep.major_version = major;
rep.minor_version = minor;
WriteReplyToClient(client, sizeof(xXIQueryVersionReply), &rep);
return Success;
}
/* Swapping routines */
int
SProcXIQueryVersion(ClientPtr client)
{
char n;
REQUEST(xXIQueryVersionReq);
swaps(&stuff->length, n);
REQUEST_AT_LEAST_SIZE(xXIQueryVersionReq);
swaps(&stuff->major_version, n);
swaps(&stuff->major_version, n);
return (ProcXIQueryVersion(client));
}
void
SRepXIQueryVersion(ClientPtr client, int size, xXIQueryVersionReply *rep)
{
char n;
swaps(&rep->sequenceNumber, n);
swapl(&rep->length, n);
swaps(&rep->major_version, n);
swaps(&rep->minor_version, n);
WriteToClient(client, size, (char *)rep);
}