From a764e59e1d3a8e330f0d484fdb26b35ca3f0b2e4 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Sat, 22 Mar 2008 02:15:12 +0000
Subject: bringing pdj-0.8.3 into the main branch

svn path=/trunk/externals/loaders/pdj/; revision=9621
---
 src/java/com/cycling74/msp/MSPBuffer.java | 127 ++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 src/java/com/cycling74/msp/MSPBuffer.java

(limited to 'src/java/com/cycling74/msp/MSPBuffer.java')

diff --git a/src/java/com/cycling74/msp/MSPBuffer.java b/src/java/com/cycling74/msp/MSPBuffer.java
new file mode 100644
index 0000000..70b730a
--- /dev/null
+++ b/src/java/com/cycling74/msp/MSPBuffer.java
@@ -0,0 +1,127 @@
+package com.cycling74.msp;
+
+/**
+ * Used to get or set pd array content. Please note that the channel parameter
+ * is added in the API to match Max/MSP MSPBuffer signature.
+ */
+public class MSPBuffer {
+    /**
+     * Returns the array content.
+     * @param name the array name
+     * @return the array contents
+     */
+    public static float[] peek(String name) {
+        return getArray(name, 0, -1);
+    }
+    
+    /**
+     * Returns the array content.
+     * @param name the array name
+     * @param channel <i>not used in pd</i>
+     * @return the array contents
+     */
+    public static float[] peek(String name, int channel) {
+        return getArray(name, 0, -1);
+    }
+
+    /**
+     * Returns the array content.
+     * @param name the array name
+     * @param channel <i>not used in pd</i>
+     * @param start the start index of the array
+     * @param length the size of the array to return
+     * @return the array contents
+     */
+    public static float[] peek(String name, int channel, long start, long length) {
+        return getArray(name, start, length);
+    }
+
+    /**
+     * Returns the array content value at a specific position.
+     * @param name the array name
+     * @param channel <i>not used in pd</i>
+     * @param index the start index of the array
+     * @return the value stored at index <code>start</code>
+     */
+    public static float peek(String name, int channel, long index) {
+        float ret[] = getArray(name, index, 1);
+        if ( ret == null ) 
+            return 0;
+        return ret[0];
+    }
+    
+    /**
+     * Sets array content.
+     * @param name the array name
+     * @param values the array to set
+     */
+    public static void poke(String name, float values[]) {
+        setArray(name, 0, values);
+    }
+
+    /**
+     * Sets array content.
+     * @param name the array name
+     * @param channel <i>not used in pd</i>
+     * @param values the array to set
+     */
+    public static void poke(String name, int channel, float values[]) {
+        setArray(name, 0, values);
+    }
+
+    /**
+     * Sets array content.
+     * @param name the array name
+     * @param channel <i>not used in pd</i>
+     * @param start the start index of the array
+     * @param values the array to set
+     */
+    public static void poke(String name, int channel, long start, float values[]) {
+        setArray(name, start, values);
+    }
+
+    /**
+     * Set a value in a array.
+     * @param name the array name
+     * @param channel <i>not used in pd</i>
+     * @param index the index in the array to set
+     * @param value the value to set in the array
+     */
+    public static void poke(String name, int channel, long index, float value) {
+        float content[] = new float[1];
+        content[0] = value;
+        setArray(name, index, content);
+    }
+    
+    /**
+     * Sets the array size.
+     * @param name the array name
+     * @param numchannel <i>not used in pd</i>
+     * @param size the new array size;
+     */
+    public static native void setSize(String name, int numchannel, long size);
+    
+	/** 
+	 * Returns the array size
+	 * @param name the array name
+	 * @return the array size or -1 if not found
+	 */
+    public static native long getSize(String name);
+    
+    private static native float[] getArray(String name, long from, long size);
+    private static native void setArray(String name, long from, float[]content);
+    private MSPBuffer() {}
+
+	/**
+	 * Return the number of channel for this array. Useless in PD cause there
+     * is no channels in a array.
+	 * @param name array name.
+	 * @return always returns 1 on pd; unless the name is not defined.
+	 */
+	public static int getChannel(String name) {
+		// resolv the name
+		if ( getSize(name) != -1 )
+			return 1;
+		return -1;
+	}
+}
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