Maximum aspiration delta of 64

[stockfish] / src / misc.cpp

diff --git a/src/misc.cpp b/src/misc.cpp
index 72f93c5e0677cd1f854d29795ebb042a25e88eab..74b6385a45217d18c833b658a013b5f58c29a904 100644 (file)
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -154,6 +154,8 @@ const string engine_name() {
   return s.str();
 }
 
+const string engine_author() { return "Tord Romstad, Marco Costalba and Joona Kiiski"; }
+
 
 /// get_system_time() returns the current system time, measured in
 /// milliseconds.
@@ -205,11 +207,11 @@ int cpu_count() {
 #endif
 
 
-/// Check for console input. Original code from Beowulf and Olithink
+/// Check for console input. Original code from Beowulf, Olithink and Greko
 
 #ifndef _WIN32
 
-int data_available()
+int input_available()
 {
   fd_set readfds;
   struct timeval  timeout;
@@ -225,35 +227,46 @@ int data_available()
 
 #else
 
-int data_available()
+int input_available()
 {
     static HANDLE inh = NULL;
-    static bool usePipe;
+    static bool usePipe = false;
     INPUT_RECORD rec[256];
-    DWORD dw, recCnt;
+    DWORD nchars, recCnt;
 
     if (!inh)
     {
         inh = GetStdHandle(STD_INPUT_HANDLE);
-        usePipe = !GetConsoleMode(inh, &dw);
-        if (!usePipe)
+        if (GetConsoleMode(inh, &nchars))
         {
-            SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
+            SetConsoleMode(inh, nchars & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
             FlushConsoleInputBuffer(inh);
-        }
+        } else
+            usePipe = true;
     }
 
-    // If we're running under XBoard then we can't use PeekConsoleInput() as
-    // the input commands are sent to us directly over the internal pipe.
+    // When using Standard C input functions, also check if there
+    // is anything in the buffer. After a call to such functions,
+    // the input waiting in the pipe will be copied to the buffer,
+    // and the call to PeekNamedPipe can indicate no input available.
+    // Setting stdin to unbuffered was not enough. [from Greko]
+    if (stdin->_cnt > 0)
+        return 1;
+
+    // When running under a GUI the input commands are sent to us
+    // directly over the internal pipe. If PeekNamedPipe() returns 0
+    // then something went wrong. Probably the parent program exited.
+    // Returning 1 will make the next call to the input function
+    // return EOF, where this should be catched then.
     if (usePipe)
-        return PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL) ? dw : 1;
+        return PeekNamedPipe(inh, NULL, 0, NULL, &nchars, NULL) ? nchars : 1;
 
     // Count the number of unread input records, including keyboard,
     // mouse, and window-resizing input records.
-    GetNumberOfConsoleInputEvents(inh, &dw);
+    GetNumberOfConsoleInputEvents(inh, &nchars);
 
     // Read data from console without removing it from the buffer
-    if (dw <= 0 || !PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt))
+    if (nchars <= 0 || !PeekConsoleInput(inh, rec, Min(nchars, 256), &recCnt))
         return 0;
 
     // Search for at least one keyboard event