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Diffstat (limited to 'src/junit/com/jogamp/common/util/TestBitstream00.java')
-rw-r--r-- | src/junit/com/jogamp/common/util/TestBitstream00.java | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/src/junit/com/jogamp/common/util/TestBitstream00.java b/src/junit/com/jogamp/common/util/TestBitstream00.java new file mode 100644 index 0000000..ef1fd45 --- /dev/null +++ b/src/junit/com/jogamp/common/util/TestBitstream00.java @@ -0,0 +1,115 @@ +/** + * Copyright 2014 JogAmp Community. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, are + * permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this list of + * conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, this list + * of conditions and the following disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR + * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * The views and conclusions contained in the software and documentation are those of the + * authors and should not be interpreted as representing official policies, either expressed + * or implied, of JogAmp Community. + */ + +package com.jogamp.common.util; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.ByteOrder; +import java.nio.IntBuffer; +import java.nio.LongBuffer; + +import org.junit.Test; + +import com.jogamp.common.nio.Buffers; +import com.jogamp.common.os.Platform; +import static com.jogamp.common.util.BitstreamData.*; +import com.jogamp.junit.util.JunitTracer; + +import org.junit.FixMethodOrder; +import org.junit.runners.MethodSorters; + +/** + * Test basic bit operations for {@link Bitstream} + */ +@FixMethodOrder(MethodSorters.NAME_ASCENDING) +public class TestBitstream00 extends JunitTracer { + + @Test + public void test00ShowByteOrder() { + int i_ff = 0xff; + byte b_ff = (byte)i_ff; + System.err.println("i_ff "+i_ff+", "+toHexBinaryString(i_ff, 8)); + System.err.println("b_ff "+b_ff+", "+toHexBinaryString(0xff & b_ff, 8)); + + System.err.println("Platform.LITTLE_ENDIAN: "+Platform.isLittleEndian()); + showOrderImpl(null); + showOrderImpl(ByteOrder.BIG_ENDIAN); + showOrderImpl(ByteOrder.LITTLE_ENDIAN); + + dumpData("tstMSB.whole", testBytesMSB, 0, testBytesMSB.length); + dumpData("tstLSB.pbyte", testBytesLSB_revByte, 0, testBytesLSB_revByte.length); + dumpData("tstLSB.whole", testBytesLSB, 0, testBytesLSB.length); + } + void showOrderImpl(ByteOrder byteOrder) { + final ByteBuffer bb_long = ByteBuffer.allocate(Buffers.SIZEOF_LONG); + if( null != byteOrder ) { + bb_long.order(byteOrder); + } + System.err.println("Order: "+byteOrder+" -> "+bb_long.order()); + final LongBuffer lb = bb_long.asLongBuffer(); + lb.put(0, 0x0807060504030201L); + dumpData("long."+byteOrder, bb_long, 0, bb_long.capacity()); + + final ByteBuffer bb_int = ByteBuffer.allocate(Buffers.SIZEOF_INT); + if( null != byteOrder ) { + bb_int.order(byteOrder); + } + final IntBuffer ib = bb_int.asIntBuffer(); + ib.put(0, 0x04030201); + dumpData("long."+byteOrder, bb_int, 0, bb_int.capacity()); + + dumpData("tstMSB.whole", testBytesMSB, 0, testBytesMSB.length); + dumpData("tstLSB.pbyte", testBytesLSB_revByte, 0, testBytesLSB_revByte.length); + dumpData("tstLSB.whole", testBytesLSB, 0, testBytesLSB.length); + } + + @Test + public void test01ShiftSigned() { + shiftSigned(0xA0000000); // negative w/ '1010' top-nibble + shiftSigned(-1); + } + void shiftSigned(final int i0) { + System.err.printf("i0 %012d, %s%n", i0, toHexBinaryString(i0, 32)); + { + int im = i0; + for(int i=0; i<32; i++) { + final int bitA = ( 0 != ( i0 & ( 1 << i ) ) ) ? 1 : 0; + final int bitB = im & 0x01; + System.err.printf("[%02d]: bit[%d, %d], im %012d, %s%n", i, bitA, bitB, im, toHexBinaryString(im, 32)); + im = im >>> 1; + } + } + } + + public static void main(String args[]) throws IOException { + String tstname = TestBitstream00.class.getName(); + org.junit.runner.JUnitCore.main(tstname); + } + +} |