xf86Versions.c   [plain text]

/* $XFree86: xc/programs/Xserver/hw/xfree86/common/xf86Versions.c,v 1.3 2004/02/13 23:58:38 dawes Exp $ */
/*
 * Copyright (c) 2003 by The XFree86 Project, Inc.
 * All rights reserved.
 *
 * 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:
 *
 *   1.  Redistributions of source code must retain the above copyright
 *       notice, this list of conditions, and the following disclaimer.
 *
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer
 *       in the documentation and/or other materials provided with the
 *       distribution, and in the same place and form as other copyright,
 *       license and disclaimer information.
 *
 *   3.  The end-user documentation included with the redistribution,
 *       if any, must include the following acknowledgment: "This product
 *       includes software developed by The XFree86 Project, Inc
 *       (http://www.xfree86.org/) and its contributors", in the same
 *       place and form as other third-party acknowledgments.  Alternately,
 *       this acknowledgment may appear in the software itself, in the
 *       same form and location as other such third-party acknowledgments.
 *
 *   4.  Except as contained in this notice, the name of The XFree86
 *       Project, Inc shall not be used in advertising or otherwise to
 *       promote the sale, use or other dealings in this Software without
 *       prior written authorization from The XFree86 Project, Inc.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE XFREE86 PROJECT, INC OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "xf86.h"
#include "xf86OSmouse.h"
#include "xf86OSKbd.h"

static CARD32 registeredVersions[NUM_BUILTIN_IFS];

CARD32
xf86GetBuiltinInterfaceVersion(BuiltinInterface iface, int flags)
{
    if (iface < 0 || iface >= NUM_BUILTIN_IFS) {
	xf86Msg(X_ERROR, "xf86GetBuiltinInterfaceVersion: Unexpected interface"
		"query: %d\n", iface);
	return 0;
    }

    if (registeredVersions[iface])
	return registeredVersions[iface];

    /* Most built-in interfaces are handled this way. */
    switch (iface) {
    case BUILTIN_IF_OSMOUSE:
	return OS_MOUSE_VERSION_CURRENT;
    case BUILTIN_IF_OSKBD:
	return OS_KBD_VERSION_CURRENT;
    default:
	xf86Msg(X_ERROR, "xf86GetBuiltinInterfaceVersion: internal error: "
		"interface %d not handled\n", iface);
	return 0;
    }
}

Bool
xf86RegisterBuiltinInterfaceVersion(BuiltinInterface iface, CARD32 version,
				    int flags)
{
    if (iface < 0 || iface >= NUM_BUILTIN_IFS) {
	xf86Msg(X_ERROR, "xf86RegisterBuiltinInterfaceVersion: "
		"unexpected interface number: %d\n", iface);
	return FALSE;
    }
    if (version == 0) {
	xf86Msg(X_ERROR, "xf86RegisterBuiltinInterfaceVersion: "
		"versions must be greater than zero\n");
	return FALSE;
    }
    registeredVersions[iface] = version;
    return TRUE;
}