1 /* 2 * Copyright (c) 2004-2008 QOS.ch 3 * All rights reserved. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining 6 * a copy of this software and associated documentation files (the 7 * "Software"), to deal in the Software without restriction, including 8 * without limitation the rights to use, copy, modify, merge, publish, 9 * distribute, sublicense, and/or sell copies of the Software, and to 10 * permit persons to whom the Software is furnished to do so, subject to 11 * the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25 package org.slf4j.profiler; 26 27 public class SpacePadder { 28 public static final String LINE_SEP = System.getProperty("line.separator"); 29 30 final static String[] SPACES = { " ", " ", " ", " ", // 1,2,4,8 31 // spaces 32 " ", // 16 spaces 33 " " }; // 32 spaces 34 35 final static public void leftPad(StringBuffer buf, String s, int desiredLength) { 36 int actualLen = 0; 37 if (s != null) { 38 actualLen = s.length(); 39 } 40 if (actualLen < desiredLength) { 41 spacePad(buf, desiredLength - actualLen); 42 } 43 if (s != null) { 44 buf.append(s); 45 } 46 } 47 48 final static public void rightPad(StringBuffer buf, String s, int desiredLength) { 49 int actualLen = 0; 50 if (s != null) { 51 actualLen = s.length(); 52 } 53 if (s != null) { 54 buf.append(s); 55 } 56 if (actualLen < desiredLength) { 57 spacePad(buf, desiredLength - actualLen); 58 } 59 } 60 61 /** 62 * Fast space padding method. 63 */ 64 final static public void spacePad(StringBuffer sbuf, int length) { 65 while (length >= 32) { 66 sbuf.append(SPACES[5]); 67 length -= 32; 68 } 69 70 for (int i = 4; i >= 0; i--) { 71 if ((length & (1 << i)) != 0) { 72 sbuf.append(SPACES[i]); 73 } 74 } 75 } 76 }