/*
DroidFish - An Android chess program.
Copyright (C) 2011-2012 Peter Ă–sterlund, peterosterlund2@gmail.com
This program 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.
This program 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/>.
*/
package org.petero.droidfish.engine;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import com.kalab.chess.enginesupport.ChessEngine;
import android.os.Build;
public class EngineUtil {
static {
System.loadLibrary("nativeutil");
}
/** Return number of physical processors, i.e. hyper-threading ignored. */
final static native int getNPhysicalProcessors();
/** Return file name of the internal stockfish executable. */
public static String internalStockFishName() {
String abi = Build.CPU_ABI;
boolean noPIE = Build.VERSION.SDK_INT < 21;
if (abi.equals("x86")) {
} else if (abi.equals("x86_64")) {
noPIE = false;
} else if (abi.equals("armeabi-v7a")) {
} else if (abi.equals("arm64-v8a")) {
noPIE = false;
} else if (abi.equals("mips")) {
} else if (abi.equals("mips64")) {
noPIE = false;
} else {
abi = "armeabi"; // Unknown ABI, assume original ARM
}
return "stockfish-" + abi + (noPIE ? "-nopie" : "");
}
/** Return true if file "engine" is a network engine. */
public static boolean isNetEngine(String engine) {
boolean netEngine = false;
try {
InputStream inStream = new FileInputStream(engine);
InputStreamReader inFile = new InputStreamReader(inStream);
char[] buf = new char[4];
if ((inFile.read(buf) == 4) && "NETE".equals(new String(buf)))
netEngine = true;
inFile.close();
} catch (IOException e) {
}
return netEngine;
}
public static final String openExchangeDir = "oex";
/** Return true if file "engine" is an open exchange engine. */
public static boolean isOpenExchangeEngine(String engine) {
File parent = new File(engine).getParentFile();
if (parent == null)
return false;
String parentDir = parent.getName();
return openExchangeDir.equals(parentDir);
}
/** Return a filename (without path) representing an open exchange engine. */
public static String openExchangeFileName(ChessEngine engine) {
String ret = "";
if (engine.getPackageName() != null)
ret += sanitizeString(engine.getPackageName());
ret += "-";
if (engine.getFileName() != null)
ret += sanitizeString(engine.getFileName());
return ret;
}
/** Remove characters from s that are not safe to use in a filename. */
private static String sanitizeString(String s) {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
char ch = s.charAt(i);
if (((ch >= 'A') && (ch <= 'Z')) ||
((ch >= 'a') && (ch <= 'z')) ||
((ch >= '0') && (ch <= '9')))
sb.append(ch);
else
sb.append('_');
}
return sb.toString();
}
/** Executes chmod 744 exePath. */
final static native boolean chmod(String exePath);
/** For synchronizing non thread safe native calls. */
public static Object nativeLock = new Object();
}