    001/**
    002 * Copyright (c) 2004-2011 QOS.ch
    003 * All rights reserved.
    004 *
    005 * Permission is hereby granted, free  of charge, to any person obtaining
    006 * a  copy  of this  software  and  associated  documentation files  (the
    007 * "Software"), to  deal in  the Software without  restriction, including
    008 * without limitation  the rights to  use, copy, modify,  merge, publish,
    009 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
    010 * permit persons to whom the Software  is furnished to do so, subject to
    011 * the following conditions:
    012 *
    013 * The  above  copyright  notice  and  this permission  notice  shall  be
    014 * included in all copies or substantial portions of the Software.
    015 *
    016 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
    017 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
    018 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
    019 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    020 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    021 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
    022 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    023 *
    024 */
    025package org.slf4j.profiler;
    026
    027public class SpacePadder {
    028    public static final String LINE_SEP = System.getProperty("line.separator");
    029
    030    final static String[] SPACES = { " ", "  ", "    ", "        ", // 1,2,4,8
    031            // spaces
    032            "                ", // 16 spaces
    033            "                                " }; // 32 spaces
    034
    035    @Deprecated
    036    final static public void leftPad(StringBuffer buf, String s, int desiredLength) {
    037        int actualLen = 0;
    038        if (s != null) {
    039            actualLen = s.length();
    040        }
    041        if (actualLen < desiredLength) {
    042            spacePad(buf, desiredLength - actualLen);
    043        }
    044        if (s != null) {
    045            buf.append(s);
    046        }
    047    }
    048
    049    final static public void leftPad(StringBuilder buf, String s, int desiredLength) {
    050        int actualLen = 0;
    051        if (s != null) {
    052            actualLen = s.length();
    053        }
    054        if (actualLen < desiredLength) {
    055            spacePad(buf, desiredLength - actualLen);
    056        }
    057        if (s != null) {
    058            buf.append(s);
    059        }
    060    }
    061
    062    @Deprecated
    063    final static public void rightPad(StringBuffer buf, String s, int desiredLength) {
    064        int actualLen = 0;
    065        if (s != null) {
    066            actualLen = s.length();
    067        }
    068        if (s != null) {
    069            buf.append(s);
    070        }
    071        if (actualLen < desiredLength) {
    072            spacePad(buf, desiredLength - actualLen);
    073        }
    074    }
    075
    076    final static public void rightPad(StringBuilder buf, String s, int desiredLength) {
    077        int actualLen = 0;
    078        if (s != null) {
    079            actualLen = s.length();
    080        }
    081        if (s != null) {
    082            buf.append(s);
    083        }
    084        if (actualLen < desiredLength) {
    085            spacePad(buf, desiredLength - actualLen);
    086        }
    087    }
    088
    089    /**
    090     * Fast space padding method.
    091     *
    092     * @param sbuf the buffer to pad
    093     * @param length the target size of the buffer after padding
    094     */
    095    @Deprecated
    096    final static public void spacePad(StringBuffer sbuf, int length) {
    097        while (length >= 32) {
    098            sbuf.append(SPACES[5]);
    099            length -= 32;
    100        }
    101
    102        for (int i = 4; i >= 0; i--) {
    103            if ((length & (1 << i)) != 0) {
    104                sbuf.append(SPACES[i]);
    105            }
    106        }
    107    }
    108
    109    /**
    110     * Fast space padding method.
    111     *
    112     * @param sbuf the buffer to pad
    113     * @param length the target size of the buffer after padding
    114     */
    115    final static public void spacePad(StringBuilder sbuf, int length) {
    116        while (length >= 32) {
    117            sbuf.append(SPACES[5]);
    118            length -= 32;
    119        }
    120
    121        for (int i = 4; i >= 0; i--) {
    122            if ((length & (1 << i)) != 0) {
    123                sbuf.append(SPACES[i]);
    124            }
    125        }
    126    }
    127}