SpacePadder xref

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    1   /**
    2    * Copyright (c) 2004-2011 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      @Deprecated
    36      final static public void leftPad(StringBuffer buf, String s, int desiredLength) {
    37          int actualLen = 0;
    38          if (s != null) {
    39              actualLen = s.length();
    40          }
    41          if (actualLen < desiredLength) {
    42              spacePad(buf, desiredLength - actualLen);
    43          }
    44          if (s != null) {
    45              buf.append(s);
    46          }
    47      }
    48
    49      final static public void leftPad(StringBuilder buf, String s, int desiredLength) {
    50          int actualLen = 0;
    51          if (s != null) {
    52              actualLen = s.length();
    53          }
    54          if (actualLen < desiredLength) {
    55              spacePad(buf, desiredLength - actualLen);
    56          }
    57          if (s != null) {
    58              buf.append(s);
    59          }
    60      }
    61
    62      @Deprecated
    63      final static public void rightPad(StringBuffer buf, String s, int desiredLength) {
    64          int actualLen = 0;
    65          if (s != null) {
    66              actualLen = s.length();
    67          }
    68          if (s != null) {
    69              buf.append(s);
    70          }
    71          if (actualLen < desiredLength) {
    72              spacePad(buf, desiredLength - actualLen);
    73          }
    74      }
    75
    76      final static public void rightPad(StringBuilder buf, String s, int desiredLength) {
    77          int actualLen = 0;
    78          if (s != null) {
    79              actualLen = s.length();
    80          }
    81          if (s != null) {
    82              buf.append(s);
    83          }
    84          if (actualLen < desiredLength) {
    85              spacePad(buf, desiredLength - actualLen);
    86          }
    87      }
    88
    89      /**
    90       * Fast space padding method.
    91       *
    92       * @param sbuf the buffer to pad
    93       * @param length the target size of the buffer after padding
    94       */
    95      @Deprecated
    96      final static public void spacePad(StringBuffer sbuf, int length) {
    97          while (length >= 32) {
    98              sbuf.append(SPACES[5]);
    99              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 }