xorg-server-1.4/hw/xfree86/common/xf86Versions.c

   1 /*
   2  * Copyright (c) 2003 by The XFree86 Project, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Except as contained in this notice, the name of the copyright holder(s)
  23  * and author(s) shall not be used in advertising or otherwise to promote
  24  * the sale, use or other dealings in this Software without prior written
  25  * authorization from the copyright holder(s) and author(s).
  26  */
  27
  28 #ifdef HAVE_XORG_CONFIG_H
  29 #include <xorg-config.h>
  30 #endif
  31
  32 #include "xf86.h"
  33 #include "xf86OSmouse.h"
  34
  35 static CARD32 registeredVersions[NUM_BUILTIN_IFS];
  36
  37 _X_EXPORT CARD32
  38 xf86GetBuiltinInterfaceVersion(BuiltinInterface iface, int flags)
  39 {
  40     if (iface < 0 || iface >= NUM_BUILTIN_IFS) {
  41         xf86Msg(X_ERROR, "xf86GetBuiltinInterfaceVersion: Unexpected interface"
  42                 "query: %d\n", iface);
  43         return 0;
  44     }
  45
  46     if (registeredVersions[iface])
  47         return registeredVersions[iface];
  48
  49     /* Most built-in interfaces are handled this way. */
  50     switch (iface) {
  51     case BUILTIN_IF_OSMOUSE:
  52         return OS_MOUSE_VERSION_CURRENT;
  53     default:
  54         xf86Msg(X_ERROR, "xf86GetBuiltinInterfaceVersion: internal error: "
  55                 "interface %d not handled\n", iface);
  56         return 0;
  57     }
  58 }
  59
  60 _X_EXPORT Bool
  61 xf86RegisterBuiltinInterfaceVersion(BuiltinInterface iface, CARD32 version,
  62                                     int flags)
  63 {
  64     if (iface < 0 || iface >= NUM_BUILTIN_IFS) {
  65         xf86Msg(X_ERROR, "xf86RegisterBuiltinInterfaceVersion: "
  66                 "unexpected interface number: %d\n", iface);
  67         return FALSE;
  68     }
  69     if (version == 0) {
  70         xf86Msg(X_ERROR, "xf86RegisterBuiltinInterfaceVersion: "
  71                 "versions must be greater than zero\n");
  72         return FALSE;
  73     }
  74     registeredVersions[iface] = version;
  75     return TRUE;
  76 }
  77