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/**
* Copyright (c) 2004-2011 QOS.ch
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
package org.slf4j.profiler;
public class SpacePadder {
public static final String LINE_SEP = System.getProperty("line.separator");
final static String[] SPACES = { " ", " ", " ", " ", // 1,2,4,8
// spaces
" ", // 16 spaces
" " }; // 32 spaces
final static public void leftPad(StringBuffer buf, String s, int desiredLength) {
int actualLen = 0;
if (s != null) {
actualLen = s.length();
}
if (actualLen < desiredLength) {
spacePad(buf, desiredLength - actualLen);
}
if (s != null) {
buf.append(s);
}
}
final static public void rightPad(StringBuffer buf, String s, int desiredLength) {
int actualLen = 0;
if (s != null) {
actualLen = s.length();
}
if (s != null) {
buf.append(s);
}
if (actualLen < desiredLength) {
spacePad(buf, desiredLength - actualLen);
}
}
/**
* Fast space padding method.
*
* @param sbuf the buffer to pad
* @param length the target size of the buffer after padding
*/
final static public void spacePad(StringBuffer sbuf, int length) {
while (length >= 32) {
sbuf.append(SPACES[5]);
length -= 32;
}
for (int i = 4; i >= 0; i--) {
if ((length & (1 << i)) != 0) {
sbuf.append(SPACES[i]);
}
}
}
}
