/*$Id: main.cc,v 26.18 2007/03/03 06:08:43 al Exp $ -*- C++ -*-
 * Copyright (C) 2001 Albert Davis
 * Author: Albert Davis <aldavis@ieee.org>
 *
 * This file is part of "Gnucap", the Gnu Circuit Analysis Package
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, 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.
 *------------------------------------------------------------------
 * top level module
 * it all starts here
 */
//testing=script 2006.07.14
#include "ap.h"
#include "patchlev.h"
#include "c_comand.h"
#include "declare.h"	/* lots */
#include "u_opt.h"
#include "l_jmpbuf.h"
/*--------------------------------------------------------------------------*/
	int	main(int,const char*[]);
static	void    sign_on(void);
static	void    read_startup_files(void);
static	void    process_cmd_line(int,const char*[]);
static	void	finish(void);
/*--------------------------------------------------------------------------*/
extern JMP_BUF env;
/*--------------------------------------------------------------------------*/
int main(int argc, const char *argv[])
{
  {
    SET_RUN_MODE xx(rBATCH);
    sign_on();
    if (!sigsetjmp(env.p, true)) {
      //try {untested();
      read_startup_files();
      setup_traps();
      process_cmd_line(argc,argv);
    }else{
      //}catch (...) {
      finish();		/* error clean up (from longjmp())	*/
      CMD::cmdproc("quit");
      exit(0);
    }
  }
  for (;;) {itested();
    SET_RUN_MODE xx(rINTERACTIVE);
    if (!sigsetjmp(env.p, true)) {itested();
      //try {
      char cmdbuf[BUFLEN];
      getcmd(I_PROMPT, cmdbuf, BUFLEN);
      CMD::cmdproc(cmdbuf);
    }else{itested();
      //}catch (...) {
      finish();		/* error clean up (from longjmp())	*/
    }
  }
  unreachable();
  return 0;
}
/*--------------------------------------------------------------------------*/
static void sign_on(void)
{
  IO::mstdout <<
    "Gnucap "  PATCHLEVEL  "\n"
    "The Gnu Circuit Analysis Package\n"
    "Never trust any version less than 1.0\n"
    "Copyright 1982-2007, Albert Davis\n"
    "Gnucap comes with ABSOLUTELY NO WARRANTY\n"
    "This is free software, and you are welcome\n"
    "to redistribute it under certain conditions\n"
    "according to the GNU General Public License.\n"
    "See the file \"COPYING\" for details.\n";
}
/*--------------------------------------------------------------------------*/
static void read_startup_files(void)
{
  std::string name = findfile(SYSTEMSTARTFILE, SYSTEMSTARTPATH, R_OK);
  if (!name.empty()) {untested();
    char cmdbuf[BUFLEN];
    sprintf(cmdbuf, "get %s", name.c_str());
    CMD::cmdproc(cmdbuf);
  }
  name = findfile(USERSTARTFILE, USERSTARTPATH, R_OK);
  if (!name.empty()) {untested();
    char cmdbuf[BUFLEN];
    sprintf(cmdbuf, "get %s", name.c_str());
    CMD::cmdproc(cmdbuf);
  }
  CMD::cmdproc("clear");
}
/*--------------------------------------------------------------------------*/
static void process_cmd_line(int argc, const char *argv[])
{
  for (int ii = 1;  ii < argc;  /*inside*/) {
    if (strcasecmp(argv[ii], "-i") == 0) {untested();
      ++ii;
      if (ii < argc) {untested();
	CMD::cmdproc(std::string("get ") + argv[ii++]);
      }else{untested();
      }
    }else if (strcasecmp(argv[ii], "-c") == 0) {itested();
      ++ii;
      if (ii < argc) {itested();
	CMD::cmdproc(argv[ii++]);
      }else{untested();
      }
    }else if (strcasecmp(argv[ii], "-b") == 0) {
      ++ii;
      if (ii < argc) {
	CMD::cmdproc(std::string("< ") + argv[ii++]);
      }else{untested();
	CMD::cmdproc(std::string("< /dev/stdin"));
      }
      if (ii >= argc) {
	CMD::cmdproc("end");
      }else{itested();
      }
    }else if (strcasecmp(argv[ii], "-a") == 0) {itested();
      ++ii;
      if (ii < argc) {itested();
	CMD::cmdproc(std::string("attach ") + argv[ii++]);
      }else{untested();
      }
    }else{untested();
      CMD::cmdproc(std::string("get ") + argv[ii++]);
    }
  }
}
/*--------------------------------------------------------------------------*/
/* finish: clean up after a command
 * deallocates space, closes plot windows, resets i/o redirection, etc.
 * This is done separately for exception handling.
 * If a command aborts, clean-up is still done, leaving a consistent state.
 */
static void finish(void)
{
  plclose();
  IO::suppresserrors = false;
  outreset();
}
/*--------------------------------------------------------------------------*/
/*--------------------------------------------------------------------------*/