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
  23 void Engine::output(const char* fmt, ...)
  24 {
  25     char buf[4096];
  26     int len;
  27     va_list va;
  28     va_start( va, fmt );
  29     len = MIN(vsnprintf( buf, 4096, fmt, va), 4096);
  30     va_end( va );
  31
  32     fwrite(buf, 1, len, stdout);
  33     fwrite(buf, 1, len, log);
  34     fflush(log);
  35 }
  36
  37 void Engine::process_input()
  38 {
  39     char str[4096];
  40     int argc = 0;
  41     char *argv[256];
  42     char *tmp;
  43     int retv = 0;
  44     Move mv;
  45
  46     if(!fgets(str,4096,stdin))
  47         exit(0);
  48
  49     fwrite("--> ", 1, 4, log);
  50     fwrite(str, 1, strlen(str), log);
  51     fflush(log);
  52
  53     for(int i=0;i<256;i++)
  54     {
  55         char *t = strtok_r( i ? NULL : str, " \t\r\n", &tmp);
  56         if(t)
  57             argv[argc++] = t;
  58         else
  59             break;
  60     }
  61
  62     if(!argc || strlen(argv[0])==0)
  63         return;
  64
  65     /* is this a move? */
  66     retv = parse_move(&mv,str);
  67
  68     /* not a move */
  69     if(retv == 0)
  70     {
  71         CmdSet::iterator it = commands.lower_bound(argv[0]);
  72         if( it != commands.end() &&
  73                 it->first.compare(0, strlen(argv[0]), argv[0]) == 0 )
  74         {
  75             Cmd& c = it->second;
  76
  77             if(it->first != argv[0])
  78                 output("%s\n", it->first.c_str());
  79
  80             if(argc-1 < c.min())
  81                 output("Error, not enough arguments for command '%s' (try 'help')\n", it->first.c_str() );
  82             else if(argc-1 > c.max())
  83                 output("Error, too many arguments for command '%s' (try 'help')\n", it->first.c_str() );
  84             else
  85                 c.run(argc-1, argv+1);
  86         }
  87         else
  88             output("Illegal command: '%s' (try 'help')\n", argv[0]);
  89     }
  90     /* a legal valid move */
  91     else if(retv == 1)
  92     {
  93         if(!io_xboard)
  94             print_moves(&mv,1);
  95
  96         move(mv);
  97
  98         if(!io_xboard)
  99             print_board();
 100     }
 101     /* a move that is illegal or ambiguous */
 102     else if(retv == 2)
 103     {
 104
 105     }
 106 }