X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;ds=sidebyside;f=src%2Fuci.cpp;h=4d68c86a04f3263216bfd764f6c4e3e535280e55;hb=fc290dc30b1f6a50fd5fd6732c276ff76305f2aa;hp=39270c6ff93697b1ff3206f4022637be613fecad;hpb=1d0159075e916c738760b788d605b71b3736cb7c;p=stockfish

diff --git a/src/uci.cpp b/src/uci.cpp
index 39270c6f..4d68c86a 100644
--- a/src/uci.cpp
+++ b/src/uci.cpp
@@ -21,6 +21,7 @@
 #include <iostream>
 #include <sstream>
 #include <string>
+#include <vector>
 
 #include "evaluate.h"
 #include "misc.h"
@@ -36,6 +37,11 @@ namespace {
   // FEN string for the initial position
   const string StartPositionFEN = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
 
+  // Keep track of position keys along the setup moves (from start position to the
+  // position just before to start searching). This is needed by draw detection
+  // where, due to 50 moves rule, we need to check at most 100 plies back.
+  StateInfo StateRingBuf[102], *SetupState = StateRingBuf;
+
   // UCIParser is a class for parsing UCI input. The class
   // is actually a string stream built on a given input string.
   typedef istringstream UCIParser;
@@ -59,7 +65,7 @@ bool execute_uci_command(const string& cmd) {
   UCIParser up(cmd);
   string token;
 
-  up >> token; // operator>>() skips any whitespace
+  up >> skipws >> token;
 
   if (token == "quit")
       return false;
@@ -120,9 +126,10 @@ namespace {
 
   void set_position(Position& pos, UCIParser& up) {
 
+    Move m;
     string token, fen;
 
-    up >> token; // operator>>() skips any whitespace
+    up >> token;
 
     if (token == "startpos")
     {
@@ -139,8 +146,14 @@ namespace {
     else return;
 
     // Parse move list (if any)
-    while (up >> token)
-        pos.do_setup_move(move_from_uci(pos, token));
+    while (up >> token && (m = move_from_uci(pos, token)) != MOVE_NONE)
+    {
+        pos.do_move(m, *SetupState);
+
+        // Increment pointer to StateRingBuf circular buffer
+        if (++SetupState - StateRingBuf >= 102)
+            SetupState = StateRingBuf;
+    }
   }
 
 
@@ -150,24 +163,20 @@ namespace {
 
   void set_option(UCIParser& up) {
 
-    string token, name;
-    string value = "true"; // UCI buttons don't have a "value" field
+    string token, name, value;
 
     up >> token; // Consume "name" token
-    up >> name;  // Read option name
 
-    // Handle names with included spaces
+    // Read option name (can contain spaces)
     while (up >> token && token != "value")
-        name += " " + token;
-
-    up >> value; // Read option value
+        name += string(" ", !name.empty()) + token;
 
-    // Handle values with included spaces
+    // Read option value (can contain spaces)
     while (up >> token)
-        value += " " + token;
+        value += string(" ", !value.empty()) + token;
 
     if (Options.find(name) != Options.end())
-        Options[name].set_value(value);
+        Options[name].set_value(value.empty() ? "true" : value); // UCI buttons don't have "value"
     else
         cout << "No such option: " << name << endl;
   }
@@ -182,7 +191,7 @@ namespace {
 
     string token;
     SearchLimits limits;
-    Move searchMoves[MAX_MOVES], *cur = searchMoves;
+    std::vector<Move> searchMoves;
     int time[] = { 0, 0 }, inc[] = { 0, 0 };
 
     while (up >> token)
@@ -209,22 +218,20 @@ namespace {
             up >> limits.maxTime;
         else if (token == "searchmoves")
             while (up >> token)
-                *cur++ = move_from_uci(pos, token);
+                searchMoves.push_back(move_from_uci(pos, token));
     }
 
-    *cur = MOVE_NONE;
+    searchMoves.push_back(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);
+    return think(pos, limits, &searchMoves[0]);
   }
 
 
   // perft() is called when engine receives the "perft" command.
   // The function calls perft() passing the required search depth
-  // then prints counted nodes and elapsed time.
+  // then prints counted leaf nodes and elapsed time.
 
   void perft(Position& pos, UCIParser& up) {