Moved DroidFish project to trunk/

DroidFish/jni/stockfish/uci.cpp

@@ -0,0 +1,247 @@
+/*
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
+  Copyright (C) 2008-2010 Marco Costalba, Joona Kiiski, Tord Romstad
+
+  Stockfish 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 3 of the License, or
+  (at your option) any later version.
+
+  Stockfish 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <cassert>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+#include "evaluate.h"
+#include "misc.h"
+#include "move.h"
+#include "position.h"
+#include "search.h"
+#include "ucioption.h"
+
+using namespace std;
+
+namespace {
+
+  // FEN string for the initial position
+  const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
+
+  // UCIParser is a class for parsing UCI input. The class
+  // is actually a string stream built on a given input string.
+  typedef istringstream UCIParser;
+
+  void set_option(UCIParser& up);
+  void set_position(Position& pos, UCIParser& up);
+  bool go(Position& pos, UCIParser& up);
+  void perft(Position& pos, UCIParser& up);
+}
+
+
+/// execute_uci_command() takes a string as input, uses a UCIParser
+/// object to parse this text string as a UCI command, and calls
+/// the appropriate functions. In addition to the UCI commands,
+/// the function also supports a few debug commands.
+
+bool execute_uci_command(const string& cmd) {
+
+  static Position pos(StartPositionFEN, false, 0); // The root position
+
+  UCIParser up(cmd);
+  string token;
+
+  up >> token; // operator>>() skips any whitespace
+
+  if (token == "quit")
+      return false;
+
+  if (token == "go")
+      return go(pos, up);
+
+  if (token == "ucinewgame")
+      pos.from_fen(StartPositionFEN, false);
+
+  else if (token == "isready")
+      cout << "readyok" << endl;
+
+  else if (token == "position")
+      set_position(pos, up);
+
+  else if (token == "setoption")
+      set_option(up);
+
+  else if (token == "perft")
+      perft(pos, up);
+
+  else if (token == "d")
+      pos.print();
+
+  else if (token == "flip")
+      pos.flip();
+
+  else if (token == "eval")
+  {
+      read_evaluation_uci_options(pos.side_to_move());
+      cout << trace_evaluate(pos) << endl;
+  }
+
+  else if (token == "key")
+      cout << "key: " << hex     << pos.get_key()
+           << "\nmaterial key: " << pos.get_material_key()
+           << "\npawn key: "     << pos.get_pawn_key() << endl;
+
+  else if (token == "uci")
+      cout << "id name "     << engine_name()
+           << "\nid author " << engine_authors()
+           << "\n"           << Options.print_all()
+           << "\nuciok"      << endl;
+  else
+      cout << "Unknown command: " << cmd << endl;
+
+  return true;
+}
+
+
+namespace {
+
+  // set_position() is called when engine receives the "position" UCI
+  // command. The function sets up the position described in the given
+  // fen string ("fen") or the starting position ("startpos") and then
+  // makes the moves given in the following move list ("moves").
+
+  void set_position(Position& pos, UCIParser& up) {
+
+    string token, fen;
+
+    up >> token; // operator>>() skips any whitespace
+
+    if (token == "startpos")
+    {
+        pos.from_fen(StartPositionFEN, false);
+        up >> token; // Consume "moves" token if any
+    }
+    else if (token == "fen")
+    {
+        while (up >> token && token != "moves")
+            fen += token + " ";
+
+        pos.from_fen(fen, Options["UCI_Chess960"].value<bool>());
+    }
+    else return;
+
+    // Parse move list (if any)
+    while (up >> token)
+        pos.do_setup_move(move_from_uci(pos, token));
+  }
+
+
+  // set_option() is called when engine receives the "setoption" UCI
+  // command. The function updates the corresponding UCI option ("name")
+  // to the given value ("value").
+
+  void set_option(UCIParser& up) {
+
+    string token, name;
+    string value = "true"; // UCI buttons don't have a "value" field
+
+    up >> token; // Consume "name" token
+    up >> name;  // Read option name
+
+    // Handle names with included spaces
+    while (up >> token && token != "value")
+        name += " " + token;
+
+    up >> value; // Read option value
+
+    // Handle values with included spaces
+    while (up >> token)
+        value += " " + token;
+
+    if (Options.find(name) != Options.end())
+        Options[name].set_value(value);
+    else
+        cout << "No such option: " << name << endl;
+  }
+
+
+  // go() is called when engine receives the "go" UCI command. The
+  // function sets the thinking time and other parameters from the input
+  // string, and then calls think(). Returns false if a quit command
+  // is received while thinking, true otherwise.
+
+  bool go(Position& pos, UCIParser& up) {
+
+    string token;
+    SearchLimits limits;
+    Move searchMoves[MAX_MOVES], *cur = searchMoves;
+    int time[] = { 0, 0 }, inc[] = { 0, 0 };
+
+    while (up >> token)
+    {
+        if (token == "infinite")
+            limits.infinite = true;
+        else if (token == "ponder")
+            limits.ponder = true;
+        else if (token == "wtime")
+            up >> time[WHITE];
+        else if (token == "btime")
+            up >> time[BLACK];
+        else if (token == "winc")
+            up >> inc[WHITE];
+        else if (token == "binc")
+            up >> inc[BLACK];
+        else if (token == "movestogo")
+            up >> limits.movesToGo;
+        else if (token == "depth")
+            up >> limits.maxDepth;
+        else if (token == "nodes")
+            up >> limits.maxNodes;
+        else if (token == "movetime")
+            up >> limits.maxTime;
+        else if (token == "searchmoves")
+            while (up >> token)
+                *cur++ = move_from_uci(pos, token);
+    }
+
+    *cur = MOVE_NONE;
+    limits.time = time[pos.side_to_move()];
+    limits.increment = inc[pos.side_to_move()];
+
+    assert(pos.is_ok());
+
+    return think(pos, limits, searchMoves);
+  }
+
+
+  // perft() is called when engine receives the "perft" command.
+  // The function calls perft() passing the required search depth
+  // then prints counted leaf nodes and elapsed time.
+
+  void perft(Position& pos, UCIParser& up) {
+
+    int depth, time;
+    int64_t n;
+
+    if (!(up >> depth))
+        return;
+
+    time = get_system_time();
+
+    n = perft(pos, depth * ONE_PLY);
+
+    time = get_system_time() - time;
+
+    std::cout << "\nNodes " << n
+              << "\nTime (ms) " << time
+              << "\nNodes/second " << int(n / (time / 1000.0)) << std::endl;
+  }
+}