/*
 * Copyright (c) 2012 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

# include  "sys_priv.h"
# include  <assert.h>

static PLI_INT32 one_string_arg_compiletf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
      vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
      vpiHandle argv;
      vpiHandle arg;

      argv = vpi_iterate(vpiArgument, callh);
      if (argv == 0) {
	    vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
	               (int)vpi_get(vpiLineNo, callh));
	    vpi_printf("%s requires a string argument.\n", name);
	    vpi_control(vpiFinish, 1);
	    return 0;
      }

      arg =  vpi_scan(argv);
      if (arg == 0) return 0;

      arg = vpi_scan(argv);
      if (arg != 0) {
	    vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
	               (int)vpi_get(vpiLineNo, callh));
	    vpi_printf("%s has too many arguments.\n", name);
	    vpi_control(vpiFinish, 1);
	    return 0;
      }

      return 0;
}

static PLI_INT32 len_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
      vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
      vpiHandle argv;
      vpiHandle arg;

      argv = vpi_iterate(vpiArgument, callh);
      assert(argv);
      arg = vpi_scan(argv);
      assert(arg);
      vpi_free_object(argv);

      int res = vpi_get(vpiSize, arg);

      s_vpi_value value;
      value.format = vpiIntVal;
      value.value.integer = res;

      vpi_put_value(callh, &value, 0, vpiNoDelay);

      return 0;
}

void v2009_string_register(void)
{
      s_vpi_systf_data tf_data;
      vpiHandle res;

      tf_data.type      = vpiSysFunc;
      tf_data.sysfunctype = vpiIntFunc;
      tf_data.tfname    = "$ivl_string_method$len";
      tf_data.calltf    = len_calltf;
      tf_data.compiletf = one_string_arg_compiletf;
      tf_data.sizetf    = 0;
      tf_data.user_data = "$ivl_string_method$len";
      res = vpi_register_systf(&tf_data);
      vpip_make_systf_system_defined(res);
}
