DroidFish: Implemented DTZ/WDL tablebase hints in the GUI when only syzygy tablebases are available.

DroidFish/jni/rtb/RtbProbe.cpp

@@ -0,0 +1,82 @@
+/*
+    DroidFish - An Android chess program.
+    Copyright (C) 2011-2012  Peter Österlund, 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/>.
+*/
+#include "RtbProbe.h"
+#include "tbprobe.hpp"
+#include <algorithm>
+
+
+static bool initOk = false;
+
+JNIEXPORT jboolean
+JNICALL Java_org_petero_droidfish_gtb_RtbProbe_init(
+        JNIEnv* env, jclass cls, jstring jTbPath)
+{
+    initOk = false;
+    const char* tbPath = (*env).GetStringUTFChars(jTbPath, NULL);
+    if (!tbPath)
+        return false;
+    std::string rtbPath(tbPath);
+    (*env).ReleaseStringUTFChars(jTbPath, tbPath);
+
+    TBProbe::initialize(rtbPath);
+    initOk = true;
+    return true;
+}
+
+JNIEXPORT void
+JNICALL Java_org_petero_droidfish_gtb_RtbProbe_probe(
+        JNIEnv* env, jobject ths, jbyteArray jSquares, jboolean wtm,
+        jint epSq, jint castleMask,
+        jint halfMoveClock, jint fullMoveCounter,
+        jintArray result)
+{
+    if ((*env).GetArrayLength(result) < 2)
+        return;
+
+    jint res[2];
+    res[0] = 1000;
+    res[1] = 1000;
+    (*env).SetIntArrayRegion(result, 0, 2, res);
+
+    if (!initOk)
+        return;
+
+    const int len = (*env).GetArrayLength(jSquares);
+    if (len != 64)
+        return;
+
+    Position pos;
+    jbyte* jbPtr = (*env).GetByteArrayElements(jSquares, NULL);
+    for (int i = 0; i < 64; i++)
+        pos.setPiece(i, jbPtr[i]);
+    (*env).ReleaseByteArrayElements(jSquares, jbPtr, 0);
+
+    pos.setWhiteMove(wtm);
+    pos.setEpSquare(epSq);
+    pos.setCastleMask(castleMask);
+    pos.setHalfMoveClock(halfMoveClock);
+    pos.setFullMoveCounter(fullMoveCounter);
+
+    int score;
+    if (TBProbe::rtbProbeWDL(pos, score))
+        res[0] = score;
+    if (TBProbe::rtbProbeDTZ(pos, score))
+        res[1] = score;
+
+    (*env).SetIntArrayRegion(result, 0, 2, res);
+}