iverilog/vvp/vpi_real.cc

/*
 * Copyright (c) 2003 Stephen Williams (steve@icarus.com)
 *
 *    This source code is free software; you can redistribute it
 *    and/or modify it in source code form under the terms of the GNU
 *    General Public License as published by the Free Software
 *    Foundation; either version 2 of the License, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */
#ifdef HAVE_CVS_IDENT
#ident "$Id: vpi_real.cc,v 1.10 2005/07/06 04:29:25 steve Exp $"
#endif

# include  "vpi_priv.h"
# include  "schedule.h"
# include  <stdio.h>
# include  <stdlib.h>
# include  <string.h>
#ifdef HAVE_MALLOC_H
# include  <malloc.h>
#endif
# include  <assert.h>


static char* real_var_get_str(int code, vpiHandle ref)
{
      assert(ref->vpi_type->type_code == vpiRealVar);

      struct __vpiRealVar*rfp = (struct __vpiRealVar*)ref;
      char *rbuf = need_result_buf(strlen(rfp->name) + 1, RBUF_STR);

      switch (code) {

	  case vpiName:
	    strcpy(rbuf, rfp->name);
	    return rbuf;

	  default:
	    return 0;
      }

      return 0;
}

static void real_var_get_value(vpiHandle ref, s_vpi_value*vp)
{
      assert(ref->vpi_type->type_code == vpiRealVar);

      struct __vpiRealVar*rfp
	    = (struct __vpiRealVar*)ref;
      vvp_fun_signal_real*fun
	    = dynamic_cast<vvp_fun_signal_real*>(rfp->net->fun);

      fun->get_value(vp);
}

static vpiHandle real_var_put_value(vpiHandle ref, p_vpi_value vp)
{
      assert(ref->vpi_type->type_code == vpiRealVar);

      struct __vpiRealVar*rfp
	    = (struct __vpiRealVar*)ref;
      vvp_fun_signal_real*fun
	    = dynamic_cast<vvp_fun_signal_real*>(rfp->net->fun);

      vvp_net_ptr_t destination (rfp->net, 0);

      assert(vp->format == vpiRealVal);
      vvp_send_real(destination, vp->value.real);

      return 0;
}

static const struct __vpirt vpip_real_var_rt = {
      vpiRealVar,

      0,
      &real_var_get_str,
      &real_var_get_value,
      &real_var_put_value,

      0,
      0,
      0,

      0
};

void vpip_real_value_change(struct __vpiCallback*cbh,
			     vpiHandle ref)
{
      struct __vpiRealVar*rfp
	    = (struct __vpiRealVar*)ref;
      vvp_fun_signal_real*fun
	    = dynamic_cast<vvp_fun_signal_real*>(rfp->net->fun);

      fun->add_vpi_callback(cbh);
}

vpiHandle vpip_make_real_var(const char*name, vvp_net_t*net)
{
      struct __vpiRealVar*obj = (struct __vpiRealVar*)
	    malloc(sizeof(struct __vpiRealVar));

      obj->base.vpi_type = &vpip_real_var_rt;
      obj->name = vpip_name_string(name);
      obj->net = net;

      return &obj->base;
}

/*
 * $Log: vpi_real.cc,v $
 * Revision 1.10  2005/07/06 04:29:25  steve
 *  Implement real valued signals and arith nodes.
 *
 * Revision 1.9  2004/05/19 03:26:25  steve
 *  Support delayed/non-blocking assignment to reals and others.
 *
 * Revision 1.8  2003/03/13 04:59:21  steve
 *  Use rbufs instead of static buffers.
 *
 * Revision 1.7  2003/03/06 04:32:00  steve
 *  Use hashed name strings for identifiers.
 *
 * Revision 1.6  2003/02/28 21:20:34  steve
 *  Allow read of realvar as int.
 *
 * Revision 1.5  2003/02/10 05:20:10  steve
 *  Add value change callbacks to real variables.
 *
 * Revision 1.4  2003/02/04 04:03:40  steve
 *  Add hex and binary formatting of real values.
 *
 * Revision 1.3  2003/02/02 01:40:24  steve
 *  Five vpi_free_object a default behavior.
 *
 * Revision 1.2  2003/01/27 00:14:37  steve
 *  Support in various contexts the $realtime
 *  system task.
 *
 * Revision 1.1  2003/01/25 23:48:06  steve
 *  Add thread word array, and add the instructions,
 *  %add/wr, %cmp/wr, %load/wr, %mul/wr and %set/wr.
 *
 */