[caffeine-hx] r661 committed - Added leftPad method

[caffe...@googlecode.com]

Revision: 661
Author: damon...@gmail.com
Date: Sun Feb 26 11:56:02 2012
Log: Added leftPad method

http://code.google.com/p/caffeine-hx/source/detail?r=661

Modified:
/trunk/ext3/BytesUtil.hx

=======================================
--- /trunk/ext3/BytesUtil.hx Sun Jan 8 16:17:30 2012
+++ /trunk/ext3/BytesUtil.hx Sun Feb 26 11:56:02 2012
@@ -211,7 +211,7 @@
}

/**
- * Pad with NULLs to the specified chunk length. Note
+ * Right pad with NULLs to the specified chunk length. Note
* that 0 length buffer passed to this will not be padded. See also
* nullBytes()
*
@@ -227,6 +227,25 @@
sb.addByte(0);
return sb.getBytes();
}
+
+ /**
+ * Left pad with 'b' to the specified chunk length.
+ *
+ * @param s Bytes to pad
+ * @param chunkLen number of bytes to pad to
+ * @param b Byte to add on left
+ * @return Original buffer if no padding required, or new buffer padded.
+ **/
+ public static function leftPad(s : Bytes, chunkLen: Int, b:Null<Int>=0) :
Bytes {
+ var r = chunkLen - (s.length % chunkLen);
+ if(s.length != 0 && r == chunkLen)
+ return s;
+ var sb = new BytesBuffer();
+ for(x in 0...r)
+ sb.addByte(b);
+ sb.add(s);
+ return sb.getBytes();
+ }

public static function ofIntArray(a : Array<Int>) : Bytes {
var b = new BytesBuffer();