/*
 * Copyright (c) 1999-2020 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 <string.h>
#include <assert.h>

static PLI_INT32 sys_finish_calltf(ICARUS_VPI_CONST PLI_BYTE8 *name)
{
      vpiHandle callh, argv;
      s_vpi_value val;
      int diag_msg = 1;
      int had_arg = 0;

      /* Get the argument list and look for the diagnostic message level. */
      callh = vpi_handle(vpiSysTfCall, 0);
      argv = vpi_iterate(vpiArgument, callh);
      if (argv) {
	    vpiHandle arg = vpi_scan(argv);
	    vpi_free_object(argv);
	    val.format = vpiIntVal;
	    vpi_get_value(arg, &val);
	    diag_msg = val.value.integer;
	    if ((diag_msg < 0) || (diag_msg > 2)) {
		  vpi_printf("WARNING: %s:%d: ", vpi_get_str(vpiFile, callh),
		             (int)vpi_get(vpiLineNo, callh));
		  vpi_printf("%s(%d) argument must be 0, 1, or 2.\n",
		             (const char*)name, (int)diag_msg);
	    }
	    had_arg = 1;
      }

      if (diag_msg != 0) {
	    s_vpi_time now;
	    int units;
	    uint64_t raw_time;
	    vpi_printf("%s:%d: %s",
	               vpi_get_str(vpiFile, callh),
	               (int)vpi_get(vpiLineNo, callh),
	               (const char*)name);
	    if (had_arg) vpi_printf("(%d)", diag_msg);
	    now.type = vpiSimTime;
	    vpi_get_time(0, &now);
	    raw_time = now.high;
	    raw_time <<= 32;
	    raw_time |= now.low;
	    vpi_printf(" called at %" PRIu64, raw_time);
	    units = vpi_get(vpiTimePrecision, 0);
	    switch (units) {
		case   2: vpi_printf(" (100s)\n");  break;
		case   1: vpi_printf(" (10s)\n");   break;
		case   0: vpi_printf(" (1s)\n");    break;
		case  -1: vpi_printf(" (100ms)\n"); break;
		case  -2: vpi_printf(" (10ms)\n");  break;
		case  -3: vpi_printf(" (1ms)\n");   break;
		case  -4: vpi_printf(" (100us)\n"); break;
		case  -5: vpi_printf(" (10us)\n");  break;
		case  -6: vpi_printf(" (1us)\n");   break;
		case  -7: vpi_printf(" (100ns)\n"); break;
		case  -8: vpi_printf(" (10ns)\n");  break;
		case  -9: vpi_printf(" (1ns)\n");   break;
		case -10: vpi_printf(" (100ps)\n"); break;
		case -11: vpi_printf(" (10ps)\n");  break;
		case -12: vpi_printf(" (1ps)\n");   break;
		case -13: vpi_printf(" (100fs)\n"); break;
		case -14: vpi_printf(" (10fs)\n");  break;
		case -15: vpi_printf(" (1fs)\n");   break;
		default:
		  vpi_printf("unknown time unit '%d'", units);
		  assert(0);
	    }
      }

      if (strcmp((const char*)name, "$stop") == 0) {
	    vpi_control(vpiStop, diag_msg);
	    return 0;
      }

      vpip_set_return_value(0);

      vpi_control(vpiFinish, diag_msg);
      return 0;
}

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

      tf_data.type      = vpiSysTask;
      tf_data.tfname    = "$finish";
      tf_data.calltf    = sys_finish_calltf;
      tf_data.compiletf = sys_one_opt_numeric_arg_compiletf;
      tf_data.sizetf    = 0;
      tf_data.user_data = "$finish";
      res = vpi_register_systf(&tf_data);
      vpip_make_systf_system_defined(res);

      tf_data.type      = vpiSysTask;
      tf_data.tfname    = "$stop";
      tf_data.calltf    = sys_finish_calltf;
      tf_data.compiletf = sys_one_opt_numeric_arg_compiletf;
      tf_data.sizetf    = 0;
      tf_data.user_data = "$stop";
      res = vpi_register_systf(&tf_data);
      vpip_make_systf_system_defined(res);
}