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     if(log)
  34     {
  35         fwrite(buf, 1, len, log);
  36         fflush(log);
  37     }
  38 }
  39
  40 void Engine::process_input()
  41 {
  42     char str[4096];
  43     int argc = 0;
  44     char *argv[256];
  45     int retv = 0;
  46     Move mv;
  47
  48     if(!fgets(str,4096,stdin))
  49         exit(0);
  50
  51     if(log)
  52     {
  53         fwrite("--> ", 1, 4, log);
  54         fwrite(str, 1, strlen(str), log);
  55         fflush(log);
  56     }
  57
  58     char *ptr = str;
  59     ptr += strspn(ptr, " \t\r\n");
  60
  61     for(int i=0;i<256;i++)
  62     {
  63         if(!*ptr)
  64             break;
  65         char *t = ptr;
  66         char *tmp = (ptr += strcspn(ptr, " \t\r\n"));
  67         ptr += strspn(ptr, ". \t\r\n");
  68         *tmp = 0;
  69
  70         printf("got \"%s\"\n", t);
  71         argv[argc++] = t;
  72     }
  73
  74     if(!argc || strlen(argv[0])==0)
  75         return;
  76
  77     /* is this a move? */
  78     retv = parse_move(&mv,str);
  79
  80     /* not a move */
  81     if(retv == 0)
  82     {
  83         CmdSet::iterator it = commands.lower_bound(argv[0]);
  84         if( it != commands.end() &&
  85                 it->first.compare(0, strlen(argv[0]), argv[0]) == 0 )
  86         {
  87             Cmd& c = it->second;
  88
  89             if(it->first != argv[0])
  90                 output("%s\n", it->first.c_str());
  91
  92             if(argc-1 < c.min())
  93                 output("Error, not enough arguments (%d) for command '%s' (try 'help')\n", argc-1, it->first.c_str() );
  94             else if(argc-1 > c.max())
  95                 output("Error, too many arguments (%d) for command '%s' (try 'help')\n", argc-1, it->first.c_str() );
  96             else
  97                 c.run(argc-1, argv+1);
  98         }
  99         else
 100             output("Illegal command: '%s' (try 'help')\n", argv[0]);
 101     }
 102     /* a legal valid move */
 103     else if(retv == 1)
 104     {
 105         if(!io_xboard)
 106             print_moves(&mv,1);
 107
 108         move(mv);
 109
 110         if(!io_xboard)
 111             print_board();
 112     }
 113     /* a move that is illegal or ambiguous */
 114     else if(retv == 2)
 115     {
 116
 117     }
 118 }