main.c

来自「Genetic Programing of music」· C语言 代码 · 共 814 行 · 第 1/2 页

          fset[i].terminal_count = 0;
          for ( j = 0; j < fset[i].size; ++j )
          {
               if ( fset[i].cset[j].arity == -1 )
               {
		    /* change the arity of evaluation tokens from -1
		       to the number of argument tokens in the called tree. */
                    fset[i].cset[j].arity = fset[tree_map[fset[i].cset[j].evaltree].fset].num_args;
                    if ( fset[i].cset[j].arity == 0 )
			 /* if there are no argument tokens in the tree,
			    mark this as a terminal. */
                         fset[i].cset[j].type = EVAL_TERM;
               }

	       /* update count of functions and terminals. */
               if ( fset[i].cset[j].arity )
                    ++fset[i].function_count;
               else
                    ++fset[i].terminal_count;
          }

	  /* now sort the function set so that all the functions
	     come first. */
          qsort ( fset[i].cset, fset[i].size, sizeof ( function ),
                 function_compare );
     }
          

#ifdef DEBUG
     /* dump the function sets to stdout. */
     for ( i = 0; i < fset_count; ++i )
     {
          printf ( "FUNCTION SET %d\n", i );
          printf ( "   %d functions; %d terminals; %d arguments\n",
                  fset[i].function_count, fset[i].terminal_count,
                  fset[i].num_args );

          for ( j = 0; j < fset[i].size; ++j )
               printf ( "%10s %06x %06x %06x arity: %3d evaltree: %3d index: %3d type: %3d\n",
                       fset[i].cset[j].string,
                       fset[i].cset[j].code,
                       fset[i].cset[j].ephem_gen,
                       fset[i].cset[j].ephem_str,
                       fset[i].cset[j].arity,
                       fset[i].cset[j].evaltree,
                       fset[i].cset[j].index,
                       fset[i].cset[j].type );
     }
#endif
                       
     oprintf ( OUT_SYS, 30, "    function set complete.\n" );

     return 0;
}

/* function_compare()
 *
 * comparison function for qsort() that puts all functions ahead of
 * all terminals.
 */

int function_compare ( const void *a, const void *b )
{
     int aa, ba;
     aa = !!(((function *)a)->arity);
     ba = !!(((function *)b)->arity);
     return ba-aa;
}

/* free_function_sets()
 *
 * free up internal copies of function sets and tree maps.
 */

void free_function_sets ( void )
{
     int i, j;

     for ( i = 0; i < fset_count; ++i )
     {
          for ( j = 0; j < fset[i].function_count + fset[i].terminal_count; ++j )
               FREE ( fset[i].cset[j].string );
          FREE ( fset[i].cset );
     }
     FREE ( fset );

     for ( i = 0; i < tree_count; ++i )
          FREE ( tree_map[i].name );
     FREE ( tree_map );
     
     fset = NULL;
     tree_map = NULL;
}

/* read_tree_limits()
 *
 * read limits on tree node count and/or depth from the parameter
 * database and fill in the appropriate fields of the tree_map
 * array.
 */

void read_tree_limits ( void )
{
     int i, j;
     char pnamebuf[100];
     char *param;

     for ( i = 0; i < tree_count; ++i )
     {
	  /* read the node limit for this tree. */
          sprintf ( pnamebuf, "tree[%d].max_nodes", i );
          param = get_parameter ( pnamebuf );
          if ( param == NULL )
               tree_map[i].nodelimit = -1;
          else
               tree_map[i].nodelimit = atoi ( param );

	  /* read the depth limit for this tree. */
          sprintf ( pnamebuf, "tree[%d].max_depth", i );
          param = get_parameter ( pnamebuf );
          if ( param == NULL )
               tree_map[i].depthlimit = -1;
          else
               tree_map[i].depthlimit = atoi ( param );
     }

     /* read the node limit for the whole individual. */
     param = get_parameter ( "max_nodes" );
     if ( param == NULL )
          ind_nodelimit = -1;
     else
          ind_nodelimit = atoi ( param );

     /* read the depth limit for the whole individual.  note that
	this is implemented just as a cap on the maximum depth of
	any single tree in the individual. */
     param = get_parameter ( "max_depth" );
     if ( param )
     {
          j = atoi ( param );
          if ( j >= 0 )
               for ( i = 0; i < tree_count; ++i )
                    if ( tree_map[i].depthlimit < 0 ||
                        tree_map[i].depthlimit > j )
                         tree_map[i].depthlimit = j;
     }
}

/* initialize_random()
 *
 * initialize the random number generator.
 */
                    
void initialize_random ( void )
{
     char *param;
     int seed;

     /* look for a seed parameter. */
     param = get_parameter ( "random_seed" );
     if ( param == NULL )
     {
	  /* if it's not found... */
#ifdef RANDOMSEEDTIME
	  /* ...use the current time. */
	  seed = time(NULL);
#else
	  /* ...use 1. */
	  seed = 1;
#endif
	  /* print out what we're using. */
	  oprintf ( OUT_SYS, 20,
		   "    no random number seed specfied; using %d.\n",
		   seed );
     }
     else
     {
	  /* the parameter was found; use it. */
	  seed = atoi ( param );
	  oprintf ( OUT_SYS, 20,
		   "    seeding random number generator with %d.\n",
		   seed );
     }
     random_seed ( seed );
}

/* pre_parameter_defaults()
 *
 * used to place values into the parameter database before any application
 * code is called or any command line options are processed.
 */

void pre_parameter_defaults ( void )
{
     add_parameter ( "output.basename",          "lilgp", PARAM_COPY_NONE );
     add_parameter ( "output.stt_interval",      "1", PARAM_COPY_NONE );
     add_parameter ( "output.detail",            "50", PARAM_COPY_NONE );
     add_parameter ( "output.bestn",             "1", PARAM_COPY_NONE );
     add_parameter ( "output.digits",            "4", PARAM_COPY_NONE );
     
     add_parameter ( "init.method",              "half_and_half",
                    PARAM_COPY_NONE );
     add_parameter ( "init.depth",               "2-6", PARAM_COPY_NONE );
     add_parameter ( "init.random_attempts",     "100", PARAM_COPY_NONE );
     
     add_parameter ( "checkpoint.filename",      "gp%06d.ckp",
                    PARAM_COPY_NONE );
     
     /* default problem uses a single population. */
     add_parameter ( "multiple.subpops", "1", PARAM_COPY_NONE );
}

/* post_parameter_defaults()
 *
 * add/change values in the parameter database after all command line options
 * are parsed.  can be used to set defaults based on values of other
 * parameters.
 */

void post_parameter_defaults ( void )
{
     binary_parameter ( "probabilistic_operators", 1 );
}

/* process_commandline()
 *
 * parses the command line.
 */

int process_commandline ( int argc, char **argv, int *gen,
                          multipop **mpop )
{
     int i;
     int errorflag = 0;
     int startfromcheckpoint = 0;

     *mpop = NULL;
     *gen = 0;

     /* if there are no arguments, print out a brief statement of usage
	and exit. */
     if ( argc < 2 )
     {
          fprintf ( stderr, "usage: %s options\nValid options are:\n", argv[0] );
	  fprintf ( stderr, "      [-f parameterfile]     read named parameter file\n" );
	  fprintf ( stderr, "      [-c checkpointfile]    restart from name checkpoint file\n" );
	  fprintf ( stderr, "      [-p name=value]        set parameter name to value\n" );
	  fprintf ( stderr, "      [-q]                   run in quiet mode\n" );
	  fprintf ( stderr, "      [-d symbol]            define symbol\n" );
	  fprintf ( stderr, "      [-u symbol]            undefine symbol\n" );
          exit(1);
     }
     
     /* load hardcoded defaults into database. */
     pre_parameter_defaults();

     for ( i = 1; i < argc; ++i )
     {
	  /* all options begin with '-' and have two characters,
	     except "-d" and "-u" which may have more. */
          if ( argv[i][0] != '-' || ( argv[i][1] != 'd' && argv[i][1] != 'u' && argv[i][2] != 0 ) )
          { 
               error ( E_ERROR, "unrecognized command line option: \"%s\".",
                      argv[i] );
               errorflag = 1;
               continue;
          }

          switch ( argv[i][1] )
          {
             case 'f':
	       /* load a parameter file, named in the next argument. */
               read_parameter_file ( argv[++i] );
               break;
             case 'p':
	       /* parse a single parameter, in the next argument. */
               if ( parse_one_parameter ( argv[++i] ) )
               {
                    errorflag = 1;
                    error ( E_ERROR, "malformed parameter: \"%s\".", argv[i] );
               }
               break;
             case 'c':
	       /* load a checkpoint file, named in the next argument. */
               if ( startfromcheckpoint )
               {
		    /* error if a checkpoint has already been loaded. */
                    error ( E_ERROR, "can't load multiple checkpoint files." );
                    errorflag = 1;
                    continue;
               }
               read_checkpoint ( argv[++i], gen, mpop );
               startfromcheckpoint = 1;
               break;
             case 'q':
	       /* turn on quiet mode (don't dup OUT_SYS to stdout). */
               quietmode = 1;
               break;
             case 'd':
	       /* define a symbol. */
               if ( argv[i][2] )
		    /* of the form "-dsymbol". */
                    define_directive ( argv[i]+2 );
               else
		    /* of the form "-d symbol". */
                    define_directive ( argv[++i] );
               break;
             case 'u':
	       /* undefine a symbol. */
               if ( argv[i][2] )
		    /* of the form "-usymbol". */
                    undefine_directive ( argv[i]+2 );
               else
		    /* of the form "-u symbol". */
                    undefine_directive ( argv[++i] );
               break;
             default:
               error ( E_ERROR, "unrecognized command line option: \"%s\".",
                      argv[i] );
               errorflag = 1;
               break;
          }
     }

     if ( errorflag )
          error ( E_FATAL_ERROR, "command line errors occurred.  dying." );

     if ( !startfromcheckpoint )
	  post_parameter_defaults();

     return startfromcheckpoint;
     
}

/* output_system_stats()
 *
 * print statistics about memory use, execution time, etc. to OUT_SYS
 * at conclusion of run.
 */

void output_system_stats ( event *t_total, event *t_eval, event *t_breed )
{
     int total, free, max, mallocc, reallocc, freec;
     int ercused, ercfree, ercblocks, ercalloc;
     int i;

     get_ephem_stats ( &ercused, &ercfree, &ercblocks, &ercalloc );
     
     oprintf ( OUT_SYS, 30, "\nSYSTEM STATISTICS\n" );

#ifdef TRACK_MEMORY
     /* if memory tracking available, then get and print the numbers. */
     get_memory_stats ( &total, &free, &max, &mallocc, &reallocc, &freec );
     oprintf ( OUT_SYS, 30, "\n------- memory -------\n" );
     oprintf ( OUT_SYS, 30, "           allocated:      %d\n", total );
     oprintf ( OUT_SYS, 30, "               freed:      %d\n", free );
     oprintf ( OUT_SYS, 30, "           not freed:      %d\n", total-free );
     oprintf ( OUT_SYS, 30, "       max allocated:      %d\n", max );
     oprintf ( OUT_SYS, 30, "    malloc'ed blocks:      %d\n", mallocc );
     oprintf ( OUT_SYS, 30, "   realloc'ed blocks:      %d\n", reallocc );  
     oprintf ( OUT_SYS, 30, "      free'ed blocks:      %d\n", freec );
#endif

#ifdef TIMING_AVAILABLE
     /* if timing is available, the get and print the numbers. */
     oprintf ( OUT_SYS, 30, "\n------- time -------\n" );
     oprintf ( OUT_SYS, 30, "             overall:      %s\n",
              event_string ( t_total ) );
     oprintf ( OUT_SYS, 30, "          evaluation:      %s\n",
              event_string ( t_eval ) );
     oprintf ( OUT_SYS, 30, "            breeding:      %s\n",
              event_string ( t_breed ) );
#endif     

     /* show how large the generation spaces grew. */
     oprintf ( OUT_SYS, 30, "\n------- generation spaces -------\n" );
     for ( i = 0; i < GENSPACE_COUNT; ++i )
          oprintf ( OUT_SYS, 30, "      space %3d size:      %d\n",
                   i, gensp[i].size );

     /* if any ERCs were used, then show these stats. */
     if ( ercused > 0 )
     {
          oprintf ( OUT_SYS, 30, "\n------- ephemeral random constants -------\n" );
          oprintf ( OUT_SYS, 30, "                used:      %d\n", ercused );
          oprintf ( OUT_SYS, 30, "               freed:      %d\n", ercfree );
          oprintf ( OUT_SYS, 30, "           allocated:      %d\n", ercalloc );
          oprintf ( OUT_SYS, 30, "              blocks:      %d\n", ercblocks );
     }
}   

/* initial_message()
 *
 * show startup and copyright messages.
 */

void initial_message ( void )
{
     oputs ( OUT_SYS, 0,
            "\n[ lil-gp Genetic Programming System.\n" );
     oputs ( OUT_SYS, 0,
            "[ Portions copyright (c) 1995 Michigan State University.  All rights reserved.\n" );
     oputs ( OUT_SYS, 0,
            "[ kernel version 1.0; 11 July 1995.\n\n\n" );
              
}