[Jnode-svn-commits] SF.net SVN: jnode: [3440] trunk/core/src/core/org/jnode/util

[<ls...@us...>]

Revision: 3440
          http://jnode.svn.sourceforge.net/jnode/?rev=3440&view=rev
Author:   lsantha
Date:     2007-08-31 13:11:03 -0700 (Fri, 31 Aug 2007)

Log Message:
-----------
Added support for standard decimal (metric or SI) and binary prefixes.

Added Paths:
-----------
    trunk/core/src/core/org/jnode/util/BinaryPrefix.java
    trunk/core/src/core/org/jnode/util/DecimalPrefix.java

Added: trunk/core/src/core/org/jnode/util/BinaryPrefix.java
===================================================================
--- trunk/core/src/core/org/jnode/util/BinaryPrefix.java	                        (rev 0)
+++ trunk/core/src/core/org/jnode/util/BinaryPrefix.java	2007-08-31 20:11:03 UTC (rev 3440)
@@ -0,0 +1,62 @@
+/*
+ * $Id$
+ */
+package org.jnode.util;
+
+import org.jnode.vm.annotation.SharedStatics;
+
+@SharedStatics
+public enum BinaryPrefix {
+	B(1l, ""),
+	K(1024l, "K"),
+	M(1024l*1024l, "M"),
+	G(1024l*1024l*1024l, "G"),
+	T(1024l*1024l*1024l*1024l, "T"),
+	P(1024l*1024l*1024l*1024l*1024l, "P"),
+	E(1024l*1024l*1024l*1024l*1024l*1024l, "E");
+	//these units have too big multipliers to fit in a long
+	// (aka they are greater than 2^64) :
+	//Z(1024l*1024l*1024l*1024l*1024l*1024l*1024l, "Z"),
+	//Y(1024l*1024l*1024l*1024l*1024l*1024l*1024l*1024l, "Y");
+
+	public static final BinaryPrefix MIN = B;
+	public static final BinaryPrefix MAX = E;
+
+	final private long multiplier;
+	final private String unit;
+
+	private BinaryPrefix(long multiplier, String unit)
+	{
+		this.multiplier = multiplier;
+		this.unit = unit;
+	}
+
+	public long getMultiplier() {
+		return multiplier;
+	}
+
+	public String getUnit() {
+		return unit;
+	}
+
+	public String toString()
+	{
+		return multiplier + ", " + unit;
+	}
+
+    /**
+	 * Convert the given value to a size string like 64K
+	 * @param v the size to convert
+	 * @return the text for of the size
+	 */
+    public static String apply(long v) {
+        for (BinaryPrefix unit : values()) {
+            if ((v < 1024) && (v > 0)) {
+                return String.valueOf(v) + unit.getUnit();
+            }
+
+            v = v >>> 10;
+        }
+        return String.valueOf(v >>> 10) + MAX.getUnit();
+    }
+}

Added: trunk/core/src/core/org/jnode/util/DecimalPrefix.java
===================================================================
--- trunk/core/src/core/org/jnode/util/DecimalPrefix.java	                        (rev 0)
+++ trunk/core/src/core/org/jnode/util/DecimalPrefix.java	2007-08-31 20:11:03 UTC (rev 3440)
@@ -0,0 +1,62 @@
+/*
+ * $Id$
+ */
+package org.jnode.util;
+
+import org.jnode.vm.annotation.SharedStatics;
+
+@SharedStatics
+public enum DecimalPrefix {
+	B(1l, ""),
+	K(1000l, "k"),
+	M(1000l*1000l, "M"),
+	G(1000l*1000l*1000l, "G"),
+	T(1000l*1000l*1000l*1000l, "T"),
+	P(1000l*1000l*1000l*1000l*1000l, "P"),
+	E(1000l*1000l*1000l*1000l*1000l*1000l, "E");
+	//these units have too big multipliers to fit in a long
+	// (aka they are greater than 2^64) :
+	//Z(1024l*1024l*1024l*1024l*1024l*1024l*1024l, "Z"),
+	//Y(1024l*1024l*1024l*1024l*1024l*1024l*1024l*1024l, "Y");
+
+	public static final DecimalPrefix MIN = B;
+	public static final DecimalPrefix MAX = E;
+
+	final private long multiplier;
+	final private String unit;
+
+	private DecimalPrefix(long multiplier, String unit)
+	{
+		this.multiplier = multiplier;
+		this.unit = unit;
+	}
+
+	public long getMultiplier() {
+		return multiplier;
+	}
+
+	public String getUnit() {
+		return unit;
+	}
+
+	public String toString()
+	{
+		return multiplier + ", " + unit;
+	}
+
+    /**
+	 * Convert the given value to a size string like 64K
+	 * @param v the size to convert
+	 * @return the text for of the size
+	 */
+    public static String apply(long v) {
+        for (DecimalPrefix unit : values()) {
+            if ((v < 1000l) && (v > 0l)) {
+                return String.valueOf(v) + unit.getUnit();
+            }
+
+            v = v / 1000l;
+        }
+        return String.valueOf(v / 1000l) + MAX.getUnit();
+    }
+}


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