added slice utility methods to Buffers + rudimentary test.

4 files changed, 84 insertions, 16 deletions

diff --git a/make/build.xml b/make/build.xml
index 193c353..b881597 100755
--- a/make/build.xml
+++ b/make/build.xml
@@ -647,18 +647,18 @@
     </delete>
   </target>    
 
-  <target name="test" depends="init, gluegen.cpptasks.detect.os, junit.run">
+  <target name="test" depends="init, gluegen.cpptasks.detect.os">
       <mkdir dir="${build}/test/build/classes"/>
       <mkdir dir="${build}/test/results"/>
 
       <property name="tools.jar" value="${java.home}/../lib/tools.jar"/>
 
-      <javac destdir="${build}/test/build/classes" failonerror="false" source="1.5" srcdir="${gluegen.root}/test/junit" debug="true" debuglevel="lines,vars,source"
-             includeAntRuntime="false">
+      <javac destdir="${build}/test/build/classes" srcdir="${gluegen.root}/test/junit" source="1.5" failonerror="false"
+            debug="true" debuglevel="lines,vars,source" includeAntRuntime="false">
           <classpath path="${junit.jar}:${build}/classes:${build}/test/gensrc/java:${tools.jar}:${ant.core.lib}"/>
       </javac>
 
-      <junit forkmode="once" showoutput="true" fork="true">
+      <junit forkmode="once" showoutput="true" fork="true" includeAntRuntime="true">
           <env key="${system.env.library.path}" path="${gluegen.lib.dir}${path.separator}${build}/test/build/natives"/>
           <jvmarg value="-Djava.library.path=${gluegen.lib.dir}${path.separator}${build}/test/build/natives"/>
           <jvmarg value="-Drootrel.build=${rootrel.build}"/>
@@ -667,6 +667,7 @@
           <batchtest todir="${build}/test/results">
               <fileset dir="${build}/test/build/classes">
                   <include name="com/sun/gluegen/**Test*"/>
+                  <include name="com/jogamp/common/nio/**Test*"/>
                   <include name="com/jogamp/common/util/**Test*"/>
               </fileset>
               <formatter usefile="false" type="plain"/>
diff --git a/nbproject/ide-file-targets.xml b/nbproject/ide-file-targets.xml
index d879376..7f1c61b 100644
--- a/nbproject/ide-file-targets.xml
+++ b/nbproject/ide-file-targets.xml
@@ -27,7 +27,7 @@
         <fail unless="run.class">Must set property 'run.class'</fail>
         <junit errorproperty="tests.failed" failureproperty="tests.failed" fork="true" forkmode="once" showoutput="true">
             <test name="${run.class}"/>
-            <jvmarg value="-Djava.library.path=${basedir}/build/test/build/natives"/>
+            <jvmarg value="-Djava.library.path=${basedir}/build/test/build/natives:${basedir}/build/obj"/>
             <classpath>
                 <path path="build/test/build/classes:build/test/gensrc/java:build/classes:lib/antlr-3.2.jar:make/lib/junit.jar:${jdk.home}/lib/tools.jar:${ant.core.lib}"/>
             </classpath>
@@ -45,7 +45,7 @@
         <junit errorproperty="tests.failed" failureproperty="tests.failed" fork="true" forkmode="once" showoutput="true">
             <test name="${run.class}"/>
             <classpath refid="cp"/>
-            <jvmarg value="-Djava.library.path=${basedir}/build/test/build/natives"/>
+            <jvmarg value="-Djava.library.path=${basedir}/build/test/build/natives:${basedir}/build/obj"/>
             <jvmarg value="-Xdebug"/>
             <jvmarg value="-Xrunjdwp:transport=dt_socket,address=${jpda.address}"/>
             <formatter type="brief" usefile="false"/>
diff --git a/src/java/com/jogamp/common/nio/Buffers.java b/src/java/com/jogamp/common/nio/Buffers.java
index 0c16b4d..7e5f8eb 100755
--- a/src/java/com/jogamp/common/nio/Buffers.java
+++ b/src/java/com/jogamp/common/nio/Buffers.java
@@ -206,6 +206,44 @@ public class Buffers {
     }
 
     /**
+     * Calls slice on the concrete buffer type.
+     */
+    public static Buffer slice(Buffer buffer) {
+        if (buffer instanceof ByteBuffer) {
+            return ((ByteBuffer) buffer).slice();
+        } else if (buffer instanceof IntBuffer) {
+            return ((IntBuffer) buffer).slice();
+        } else if (buffer instanceof ShortBuffer) {
+            return ((ShortBuffer) buffer).slice();
+        } else if (buffer instanceof FloatBuffer) {
+            return ((FloatBuffer) buffer).slice();
+        } else if (Platform.isJavaSE()) {
+            if (buffer instanceof DoubleBuffer) {
+                return ((DoubleBuffer) buffer).slice();
+            } else if (buffer instanceof LongBuffer) {
+                return ((LongBuffer) buffer).slice();
+            } else if (buffer instanceof CharBuffer) {
+                return ((CharBuffer) buffer).slice();
+            }
+        }
+        throw new IllegalArgumentException("unexpected buffer type: " + buffer.getClass());
+    }
+
+    /**
+     * Slices the specified buffer with offset as position and offset+size as limit.
+     */
+    public static Buffer slice(Buffer buffer, int offset, int size) {
+        int pos = buffer.position();
+        int limit = buffer.limit();
+
+        buffer.position(offset).limit(offset+size);
+        Buffer slice = slice(buffer);
+
+        buffer.position(pos).limit(limit);
+        return slice;
+    }
+
+    /**
      * Helper routine to set a ByteBuffer to the native byte order, if
      * that operation is supported by the underlying NIO
      * implementation.
@@ -277,7 +315,7 @@ public class Buffers {
                 return ((CharBuffer) buf).isDirect();
             }
         }
-        throw new RuntimeException("Unexpected buffer type " + buf.getClass().getName());
+        throw new IllegalArgumentException("Unexpected buffer type " + buf.getClass().getName());
     }
 
     /**
@@ -316,7 +354,7 @@ public class Buffers {
             return pointerBuffer.position() * PointerBuffer.elementSize();
         }
 
-        throw new RuntimeException("Disallowed array backing store type in buffer " + buf.getClass().getName());
+        throw new IllegalArgumentException("Disallowed array backing store type in buffer " + buf.getClass().getName());
     }
 
     /**
@@ -349,7 +387,7 @@ public class Buffers {
             }
         }
 
-        throw new RuntimeException("Disallowed array backing store type in buffer " + buf.getClass().getName());
+        throw new IllegalArgumentException("Disallowed array backing store type in buffer " + buf.getClass().getName());
     }
 
     /**
@@ -389,7 +427,7 @@ public class Buffers {
             return PointerBuffer.elementSize() * (pointerBuffer.arrayOffset() + pointerBuffer.position());
         }
 
-        throw new RuntimeException("Unknown buffer type " + buf.getClass().getName());
+        throw new IllegalArgumentException("Unknown buffer type " + buf.getClass().getName());
     }
 
 
@@ -543,7 +581,7 @@ public class Buffers {
                 return ((CharBuffer) dest).put((CharBuffer) src);
             }
         }
-        throw new RuntimeException("Incompatible Buffer classes: dest = " + dest.getClass().getName() + ", src = " + src.getClass().getName());
+        throw new IllegalArgumentException("Incompatible Buffer classes: dest = " + dest.getClass().getName() + ", src = " + src.getClass().getName());
     }
 
     public static Buffer putb(Buffer dest, byte v) {
@@ -554,7 +592,7 @@ public class Buffers {
         } else if (dest instanceof IntBuffer) {
             return ((IntBuffer) dest).put((int) v);
         } else {
-            throw new RuntimeException("Byte doesn't match Buffer Class: " + dest);
+            throw new IllegalArgumentException("Byte doesn't match Buffer Class: " + dest);
         }
     }
 
@@ -564,7 +602,7 @@ public class Buffers {
         } else if (dest instanceof IntBuffer) {
             return ((IntBuffer) dest).put((int) v);
         } else {
-            throw new RuntimeException("Short doesn't match Buffer Class: " + dest);
+            throw new IllegalArgumentException("Short doesn't match Buffer Class: " + dest);
         }
     }
 
@@ -572,7 +610,7 @@ public class Buffers {
         if (dest instanceof IntBuffer) {
             ((IntBuffer) dest).put(v);
         } else {
-            throw new RuntimeException("Integer doesn't match Buffer Class: " + dest);
+            throw new IllegalArgumentException("Integer doesn't match Buffer Class: " + dest);
         }
     }
 
@@ -584,14 +622,14 @@ public class Buffers {
             ((IntBuffer) dest).put(FixedPoint.toFixed(v));
 */
         } else {
-            throw new RuntimeException("Float doesn't match Buffer Class: " + dest);
+            throw new IllegalArgumentException("Float doesn't match Buffer Class: " + dest);
         }
     }
     public static void putd(Buffer dest, double v) {
         if (dest instanceof FloatBuffer) {
             ((FloatBuffer) dest).put((float) v);
         } else {
-            throw new RuntimeException("Double doesn't match Buffer Class: " + dest);
+            throw new IllegalArgumentException("Double doesn't match Buffer Class: " + dest);
         }
     }
 
diff --git a/test/junit/com/jogamp/common/nio/BuffersTest.java b/test/junit/com/jogamp/common/nio/BuffersTest.java
new file mode 100644
index 0000000..c5e5758
--- /dev/null
+++ b/test/junit/com/jogamp/common/nio/BuffersTest.java
@@ -0,0 +1,29 @@
+/*
+ * Created on Sunday, July 04 2010 20:00
+ */
+package com.jogamp.common.nio;
+
+import java.nio.IntBuffer;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * @author Michael Bien
+ */
+public class BuffersTest {
+
+    @Test
+    public void slice() {
+        IntBuffer buffer = Buffers.newDirectIntBuffer(6);
+        buffer.put(new int[]{1,2,3,4,5,6}).rewind();
+
+        IntBuffer threefour = (IntBuffer)Buffers.slice(buffer, 2, 2);
+
+        assertEquals(3, threefour.get(0));
+        assertEquals(4, threefour.get(1));
+        assertEquals(2, threefour.capacity());
+
+    }
+
+}