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[fceu.git] / drivers / common / args.c

/* FCE Ultra - NES/Famicom Emulator
 *
 * Copyright notice for this file:
 *  Copyright (C) 2002 Ben Parnell
 *
 * 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 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
 */

/****************************************************************/
/*			FCE Ultra				*/
/*								*/
/*	This file contains code for parsing command-line    	*/
/*	options.						*/
/*								*/
/****************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "../../types.h"
#include "args.h"

static int ParseEA(int x, int argc, char *argv[], ARGPSTRUCT *argsps)
{
  int y=0,ret=0;

  do
  {
   if(!argsps[y].name)
   {
    ret = ParseEA(x,argc,argv,(void *)argsps[y].var);
    y++;
    continue;
   }
   if(!strcmp(argv[x],argsps[y].name))	// A match.
   {
    if(argsps[y].subs)
    {
     if((x+1)>=argc)
      return 0;
     if(argsps[y].substype&0x8000)
     {
      *(int *)argsps[y].subs&=~(argsps[y].substype&(~0x8000));
      *(int *)argsps[y].subs|=atoi(argv[x+1])?(argsps[y].substype&(~0x8000)):0;
     }
     else
      switch(argsps[y].substype&(~0x4000))
      {
       case 0:		// Integer
 	      *(int *)argsps[y].subs=atoi(argv[x+1]);
	      break;
       case 1:		// String
	      if(argsps[y].substype&0x4000)
	      {
               if(*(char **)argsps[y].subs)
		free(*(char **)argsps[y].subs);
	       if(!( *(char **)argsps[y].subs=malloc(strlen(argv[x+1])+1) ))
		break;
	      }
	      strcpy(*(char **)argsps[y].subs,argv[x+1]);
	      break;
      }
     ret=2;
    }
    else if(argsps[y].var)
    {
     *argsps[y].var=1;
     ret=1;
    }
   }
   y++;
  } while(argsps[y].var || argsps[y].subs);
  return ret;
}

/* returns 1 if last arg was usccessfully parsed */
int ParseArguments(int argc, char *argv[], ARGPSTRUCT *argsps)
{
 int x, ret=0;

 for(x=0;x<argc;x++)
 {
  ret = ParseEA(x,argc,argv,argsps);
  if (ret == 2) x++;
 }

 return ret;
}