io.cpp

   1 /***************************************************************************
   2                           main.cpp  -  description
   3                              -------------------
   4     begin                : Dom Oct 9 2005
   5     copyright            : (C) 2005 by Maurizio Monge
   6     email                : monge@linuz.sns.it
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #include <stdarg.h>
  19 #include <string.h>
  20 #include "engine.h"
  21 #include "commands.h"
  22 #include "search_gui.h"
  23
  24 void Engine::output(const char* fmt, ...)
  25 {
  26     char buf[4096];
  27     int len;
  28     va_list va;
  29     va_start( va, fmt );
  30     len = MIN(vsnprintf( buf, 4096, fmt, va), 4096);
  31     va_end( va );
  32
  33     fwrite(buf, 1, len, stdout);
  34     if(log)
  35     {
  36         fwrite(buf, 1, len, log);
  37         fflush(log);
  38     }
  39 }
  40
  41 void Engine::process_input()
  42 {
  43     int argc = 0;
  44     char **argv;
  45     Move mv;
  46
  47     if(search_gui)
  48         search_gui->wait_input();
  49     argv = get_tokenized(&argc);
  50
  51     if(!argv)
  52         exit(0);
  53
  54     if(!argc || strlen(argv[0])==0)
  55     {
  56         free(argv);
  57         return;
  58     }
  59
  60     /* is this a move? */
  61     mv = board.move_from_string(argv[0]);
  62
  63     if(mv == Move::Illegal())
  64         output("Illegal move: %s\n", argv[0]);
  65     else if(mv == Move::Ambiguous())
  66         output("Illegal move (ambiguous): %s\n", argv[0]);
  67     else if(mv == Move::None()) /* not a move */
  68     {
  69         CmdSet::iterator it = commands.lower_bound(argv[0]);
  70         if( it != commands.end() &&
  71                 it->first.compare(0, strlen(argv[0]), argv[0]) == 0 )
  72         {
  73             Cmd& c = it->second;
  74
  75             if(it->first != argv[0])
  76                 output("%s\n", it->first.c_str());
  77
  78             if(argc-1 < c.min())
  79                 output("Error, not enough arguments (%d) for command '%s' (try 'help')\n", argc-1, it->first.c_str() );
  80             else if(argc-1 > c.max())
  81                 output("Error, too many arguments (%d) for command '%s' (try 'help')\n", argc-1, it->first.c_str() );
  82             else
  83                 c.run(argc-1, argv+1);
  84         }
  85         else
  86             output("Unknown command: '%s' (try 'help')\n", argv[0]);
  87     }
  88     /* a valid move */
  89     else
  90     {
  91         if(!io_xboard)
  92             print_moves(&mv,1);
  93
  94         move(mv);
  95
  96         if(!io_xboard)
  97             print_board();
  98     }
  99
 100     free(argv);
 101 }