2 Stockfish, a UCI chess playing engine derived from Glaurung 2.1
3 Copyright (C) 2004-2008 Tord Romstad (Glaurung author)
4 Copyright (C) 2008 Marco Costalba
6 Stockfish is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 Stockfish is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #if !defined(_MSC_VER)
27 # include <sys/time.h>
28 # include <sys/types.h>
36 int gettimeofday(struct timeval * tp, struct timezone * tzp);
55 bool dbg_show_mean = false;
56 bool dbg_show_hit_rate = false;
63 void dbg_print_hit_rate() {
65 std::cout << "Total " << dbg_cnt0 << " Hit " << dbg_cnt1
66 << " hit rate (%) " << (dbg_cnt1*100)/(dbg_cnt0 ? dbg_cnt0 : 1)
70 void dbg_print_mean() {
72 std::cout << "Total " << dbg_cnt0 << " Mean "
73 << (float)dbg_cnt1 / (dbg_cnt0 ? dbg_cnt0 : 1) << std::endl;
76 /// engine_name() returns the full name of the current Stockfish version.
77 /// This will be either "Stockfish YYMMDD" (where YYMMDD is the date when the
78 /// program was compiled) or "Stockfish <version number>", depending on whether
79 /// the constant EngineVersion (defined in misc.h) is empty.
81 const std::string engine_name() {
83 if (EngineVersion.empty())
85 std::string date(__DATE__); // From compiler, format is "Sep 21 2008"
86 std::string months("Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec");
88 size_t mon = 1 + months.find(date.substr(0, 3)) / 4;
91 std::string day = (date[4] == ' ' ? date.substr(5, 1) : date.substr(4, 2));
93 s << "Stockfish " << date.substr(date.length() - 2) << std::setfill('0')
94 << std::setw(2) << mon << std::setw(2) << day;
98 return "Stockfish " + EngineVersion;
102 /// get_system_time() returns the current system time, measured in
105 int get_system_time() {
107 gettimeofday(&t, NULL);
108 return t.tv_sec*1000 + t.tv_usec/1000;
112 /// cpu_count() tries to detect the number of CPU cores.
114 #if !defined(_MSC_VER)
116 # if defined(_SC_NPROCESSORS_ONLN)
118 return Min(sysconf(_SC_NPROCESSORS_ONLN), 8);
131 return Min(s.dwNumberOfProcessors, 8);
138 From Beowulf, from Olithink
141 /* Non-windows version */
145 struct timeval timeout;
148 FD_SET(fileno(stdin), &readfds);
149 /* Set to timeout immediately */
152 select(16, &readfds, 0, 0, &timeout);
154 return (FD_ISSET(fileno(stdin), &readfds));
158 /* Windows-version */
167 /* If we're running under XBoard then we can't use _kbhit() as the input
168 * commands are sent to us directly over the internal pipe */
170 #if defined(FILE_CNT)
176 inh = GetStdHandle(STD_INPUT_HANDLE);
177 pipe = !GetConsoleMode(inh, &dw);
179 SetConsoleMode(inh, dw & ~(ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT));
180 FlushConsoleInputBuffer(inh);
184 if (!PeekNamedPipe(inh, NULL, 0, NULL, &dw, NULL))
188 // Count the number of unread input records, including keyboard,
189 // mouse, and window-resizing input records.
190 GetNumberOfConsoleInputEvents(inh, &dw);
194 // Read data from console without removing it from the buffer
195 INPUT_RECORD rec[256];
197 if (!PeekConsoleInput(inh, rec, Min(dw, 256), &recCnt))
200 // Search for at least one keyboard event
201 for (DWORD i = 0; i < recCnt; i++)
202 if (rec[i].EventType == KEY_EVENT)