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- /* $Header: XQueryDv.c,v 1.10 91/02/09 17:53:04 rws Exp $ */
-
- /************************************************************
- Copyright (c) 1989 by Hewlett-Packard Company, Palo Alto, California, and the
- Massachusetts Institute of Technology, Cambridge, Massachusetts.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Hewlett-Packard or MIT not be
- used in advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- SOFTWARE.
-
- ********************************************************/
-
- /***********************************************************************
- *
- * XQueryDeviceState - Query the state of an extension input device.
- *
- */
-
- #include "XI.h"
- #include "XIproto.h"
- #include "Xlibint.h"
- #include "XInput.h"
- #include "extutil.h"
-
- XDeviceState
- *XQueryDeviceState (dpy, dev)
- register Display *dpy;
- XDevice *dev;
- {
- int i,j;
- int rlen;
- int size = 0;
- xQueryDeviceStateReq *req;
- xQueryDeviceStateReply rep;
- XDeviceState *state = NULL;
- XInputClass *any, *Any;
- char *data;
- XExtDisplayInfo *info = (XExtDisplayInfo *) XInput_find_display (dpy);
-
- LockDisplay (dpy);
- if (CheckExtInit(dpy, XInput_Initial_Release) == -1)
- return ((XDeviceState *) NoSuchExtension);
-
- GetReq(QueryDeviceState,req);
- req->reqType = info->codes->major_opcode;
- req->ReqType = X_QueryDeviceState;
- req->deviceid = dev->device_id;
-
- if (! _XReply (dpy, (xReply *) &rep, 0, xFalse))
- {
- UnlockDisplay(dpy);
- SyncHandle();
- return (XDeviceState *) NULL;
- }
-
- rlen = rep.length << 2;
- if (rlen > 0)
- {
- data = Xmalloc (rlen);
- if (!data)
- {
- _XEatData (dpy, (unsigned long) rlen);
- UnlockDisplay(dpy);
- SyncHandle();
- return ((XDeviceState *) NULL);
- }
- _XRead (dpy, data, rlen);
-
- for (i=0, any=(XInputClass *) data; i<(int)rep.num_classes; i++)
- {
- switch (any->class)
- {
- case KeyClass:
- size += sizeof (XKeyState);
- break;
- case ButtonClass:
- size += sizeof (XButtonState);
- break;
- case ValuatorClass:
- {
- xValuatorState *v = (xValuatorState *) any;
- size += (sizeof (XValuatorState) +
- (v->num_valuators * sizeof(int)));
- }
- break;
- }
- any = (XInputClass *) ((char *) any + any->length);
- }
- state = (XDeviceState *) Xmalloc (size + sizeof(XDeviceState));
- if (!state)
- {
- UnlockDisplay(dpy);
- SyncHandle();
- return ((XDeviceState *) NULL);
- }
- state->device_id = dev->device_id;
- state->num_classes = rep.num_classes;
- state->data = (XInputClass *) (state + 1);
-
- Any = state->data;
- for (i=0, any=(XInputClass *) data; i<(int)rep.num_classes; i++)
- {
- switch (any->class)
- {
- case KeyClass:
- {
- xKeyState *k = (xKeyState *) any;
- XKeyState *K = (XKeyState *) Any;
- K->class = k->class;
- K->length = sizeof (XKeyState);
- K->num_keys = k->num_keys;
- bcopy ((char *) &k->keys[0], (char *) &K->keys[0], 32);
- Any = (XInputClass *) (K+1);
- }
- break;
- case ButtonClass:
- {
- xButtonState *b = (xButtonState *) any;
- XButtonState *B = (XButtonState *) Any;
- B->class = b->class;
- B->length = sizeof (XButtonState);
- B->num_buttons = b->num_buttons;
- bcopy ((char *) &b->buttons[0], (char *) &B->buttons[0],
- 32);
- Any = (XInputClass *) (B+1);
- }
- break;
- case ValuatorClass:
- {
- xValuatorState *v = (xValuatorState *) any;
- XValuatorState *V = (XValuatorState *) Any;
- CARD32 *valuators = (CARD32 *) (v+1);
- V->class = v->class;
- V->length = sizeof (XValuatorState);
- V->num_valuators = v->num_valuators;
- V->mode = v->mode;
- Any = (XInputClass *) (V+1);
- V->valuators = (int *) Any;
- for (j=0; j<(int)V->num_valuators; j++)
- *(V->valuators + j) = *valuators++;
- Any = (XInputClass *)((char *) Any +
- V->num_valuators * sizeof (int));
- }
- break;
- }
- any = (XInputClass *) ((char *) any + any->length);
- }
- Xfree(data);
- }
-
- UnlockDisplay(dpy);
- SyncHandle();
- return (state);
- }
-
- XFreeDeviceState (list)
- XDeviceState *list;
- {
- XFree ((char *)list);
- }
-