// Copyright status: this file is in the public domain.

#include "lx.h"

#include "proto.h"
#include "internal.h"

#define ID(v) lx__identity_s32((v))

void lx_ChangePointerControl(LX_CONN *xc, const LX_POINTERCONTROL *pc)
{
 unsigned char req[12];

 if ( (xc->flags & XCF_FAIL) ||
      ( (pc->flags & LX_POINTERCONTROL_ACCEL) &&
	( (ID(pc->numerator) < -32768) || (ID(pc->numerator) > 32767) ||
	  (ID(pc->denominator) < -32768) || (ID(pc->denominator) > 32767) ) ) ||
      ( (pc->flags & LX_POINTERCONTROL_THRESH) &&
	((ID(pc->threshold) < -32768) || (ID(pc->threshold) > 32767)) ) )
  { lx__bad_call(xc,"lx_ChangePointerControl");
    return;
  }
 lx__nochain(xc);
 req[0] = LX_CORE_ChangePointerControl;
 req[1] = 0; // unused
 w_card16(&req[2],3);
 w_int16(&req[4],(pc->flags&LX_POINTERCONTROL_ACCEL)?pc->numerator:0);
 w_int16(&req[6],(pc->flags&LX_POINTERCONTROL_ACCEL)?pc->denominator:0);
 w_int16(&req[8],(pc->flags&LX_POINTERCONTROL_THRESH)?pc->threshold:0);
 req[10] = (pc->flags & LX_POINTERCONTROL_ACCEL) ? 1 : 0;
 req[11] = (pc->flags & LX_POINTERCONTROL_THRESH) ? 1 : 0;
 lx__send_req(xc,&req[0],-1);
}