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DroidFish: Made sure the stockfish executable gets installed if it has been modified.

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This commit is contained in:
Peter Osterlund 2012-01-06 21:03:50 +00:00
parent f3c99a56f4
commit e2a3215e20
2 changed files with 69 additions and 5 deletions
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1
DroidFish/src/org/petero/droidfish/DroidFish.java
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@ -110,6 +110,7 @@ public class DroidFish extends Activity implements GUIInterface {
// FIXME!!! Implement bookmark mechanism for positions in pgn files
// FIXME!!! Display chess notation in local language
// FIXME!!! Add support for "Chess Leipzig" font
// FIXME!!! Implement figurine notation
// FIXME!!! Computer clock should stop if phone turned off (computer stops thinking if unplugged)
// FIXME!!! Add support for all time controls defined by the PGN standard

73
DroidFish/src/org/petero/droidfish/engine/InternalStockFish.java
View File

@ -18,11 +18,16 @@
package org.petero.droidfish.engine;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import android.content.Context;
import android.os.Build;
@ -50,18 +55,76 @@ public class InternalStockFish extends ExternalEngine {
final String get() { return Build.CPU_ABI; }
}
private final long readCheckSum(File f) {
InputStream is = null;
try {
is = new FileInputStream(f);
DataInputStream dis = new DataInputStream(is);
return dis.readLong();
} catch (IOException e) {
return 0;
} finally {
if (is != null) try { is.close(); } catch (IOException ex) {}
}
}
private final void writeCheckSum(File f, long checkSum) {
OutputStream os = null;
try {
os = new FileOutputStream(f);
DataOutputStream dos = new DataOutputStream(os);
dos.writeLong(checkSum);
} catch (IOException e) {
} finally {
if (os != null) try { os.close(); } catch (IOException ex) {}
}
}
private final long computeAssetsCheckSum(String sfExe) {
InputStream is = null;
try {
is = context.getAssets().open(sfExe);
MessageDigest md = MessageDigest.getInstance("SHA-1");
byte[] buf = new byte[8192];
while (true) {
int len = is.read(buf);
if (len <= 0)
break;
md.update(buf, 0, len);
}
byte[] digest = md.digest(new byte[]{0});
long ret = 0;
for (int i = 0; i < 8; i++) {
ret ^= ((long)digest[i]) << (i * 8);
}
return ret;
} catch (IOException e) {
return -1;
} catch (NoSuchAlgorithmException e) {
return -1;
} finally {
if (is != null) try { is.close(); } catch (IOException ex) {}
}
}
@Override
protected void copyFile(File from, File to) throws IOException {
if (new File(intSfPath).exists())
final int sdkVersion = Integer.parseInt(Build.VERSION.SDK);
final String abi = (sdkVersion < 4) ? "armeabi" : new CpuAbi().get();
final String sfExe = "stockfish-" + abi;
// The checksum test is to avoid writing to /data unless necessary,
// on the assumption that it will reduce memory wear.
long oldCSum = readCheckSum(new File(intSfPath));
long newCSum = computeAssetsCheckSum(sfExe);
if (oldCSum == newCSum)
return;
if (to.exists())
to.delete();
to.createNewFile();
final int sdkVersion = Integer.parseInt(Build.VERSION.SDK);
String abi = (sdkVersion < 4) ? "armeabi" : new CpuAbi().get();
InputStream is = context.getAssets().open("stockfish-" + abi);
InputStream is = context.getAssets().open(sfExe);
OutputStream os = new FileOutputStream(to);
try {
@ -77,6 +140,6 @@ public class InternalStockFish extends ExternalEngine {
if (os != null) try { os.close(); } catch (IOException ex) {}
}
new File(intSfPath).createNewFile();
writeCheckSum(new File(intSfPath), newCSum);
}
}