IABSD.fr/xenocara/lib/libXi/src/XGetDProp.c

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  Commit

• Author : matthieu
  Date : 2009-05-02 15:23:04
  Hash : 0624b5db
  Message : update to libXi 1.2.1

• lib/libXi/src/XGetDProp.c

• /************************************************************
  
  Copyright 2008 Peter Hutterer
  
  Permission to use, copy, modify, distribute, and sell this software and its
  documentation for any purpose is hereby granted without fee, provided that
  the above copyright notice appear in all copies and that both that
  copyright notice and this permission notice appear in supporting
  documentation.
  
  The above copyright notice and this permission notice 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
  AUTHOR 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.
  
  Except as contained in this notice, the name of the author 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 author.
  
  */
  
  /***********************************************************************
   * XGetDeviceProperties - get an input device's properties.
   */
  
  #ifdef HAVE_CONFIG_H
  #include <config.h>
  #endif
  
  #include <X11/Xlibint.h>
  #include <X11/extensions/XI.h>
  #include <X11/extensions/XIproto.h>
  #include <X11/extensions/XInput.h>
  #include <X11/extensions/extutil.h>
  #include "XIint.h"
  
  int
  XGetDeviceProperty(Display* dpy, XDevice* dev,
  			 Atom property, long offset, long length, Bool delete,
                           Atom req_type, Atom *actual_type, int *actual_format,
                           unsigned long *nitems, unsigned long *bytes_after,
                           unsigned char **prop)
  {
      xGetDevicePropertyReq   *req;
      xGetDevicePropertyReply rep;
      long                    nbytes, rbytes;
  
      XExtDisplayInfo *info = XInput_find_display(dpy);
  
      LockDisplay(dpy);
      if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1)
  	return 1;
  
      GetReq(GetDeviceProperty, req);
      req->reqType    = info->codes->major_opcode;
      req->ReqType    = X_GetDeviceProperty;
      req->deviceid   = dev->device_id;
      req->property   = property;
      req->type       = req_type;
      req->longOffset = offset;
      req->longLength = length;
      req->delete     = delete;
  
      if (!_XReply (dpy, (xReply *) &rep, 0, xFalse))
      {
  	UnlockDisplay (dpy);
  	SyncHandle ();
  	return 1;
      }
  
      *prop = (unsigned char *) NULL;
  
      if (rep.propertyType != None) {
  	/*
  	 * One extra byte is malloced than is needed to contain the property
  	 * data, but this last byte is null terminated and convenient for
  	 * returning string properties, so the client doesn't then have to
  	 * recopy the string to make it null terminated.
  	 */
  	switch (rep.format) {
  	case 8:
  	    nbytes = rep.nItems;
  	    rbytes = rep.nItems + 1;
  	    if (rbytes > 0 &&
  		(*prop = (unsigned char *) Xmalloc ((unsigned)rbytes)))
  		_XReadPad (dpy, (char *) *prop, nbytes);
  	    break;
  
  	case 16:
  	    nbytes = rep.nItems << 1;
  	    rbytes = rep.nItems * sizeof (short) + 1;
  	    if (rbytes > 0 &&
  		(*prop = (unsigned char *) Xmalloc ((unsigned)rbytes)))
  		_XRead16Pad (dpy, (short *) *prop, nbytes);
  	    break;
  
  	case 32:
  	    nbytes = rep.nItems << 2;
  	    rbytes = rep.nItems * sizeof (long) + 1;
  	    if (rbytes > 0 &&
  		(*prop = (unsigned char *) Xmalloc ((unsigned)rbytes)))
  		_XRead32 (dpy, (long *) *prop, nbytes);
  	    break;
  
  	default:
  	    /*
  	     * This part of the code should never be reached.  If it is,
  	     * the server sent back a property with an invalid format.
  	     */
  	    nbytes = rep.length << 2;
  	    _XEatData(dpy, (unsigned long) nbytes);
  	    UnlockDisplay(dpy);
  	    SyncHandle();
  	    return(BadImplementation);
  	}
  	if (! *prop) {
  	    _XEatData(dpy, (unsigned long) nbytes);
  	    UnlockDisplay(dpy);
  	    SyncHandle();
  	    return(BadAlloc);
  	}
  	(*prop)[rbytes - 1] = '\0';
      }
  
      *actual_type = rep.propertyType;
      *actual_format = rep.format;
      *nitems = rep.nItems;
      *bytes_after = rep.bytesAfter;
      UnlockDisplay (dpy);
      SyncHandle ();
  
      return Success;
  }