Mercurial > hg > truffle
annotate graal/GraalCompiler/src/com/sun/c1x/debug/LogStream.java @ 2668:32e8315bb6e4
fixed slot encoding in duplicateModified
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Thu, 12 May 2011 12:13:17 +0200 |
parents | 16b9a8b5ad39 |
children |
rev | line source |
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1 /* |
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2 * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.sun.c1x.debug; |
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24 |
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25 import java.io.*; |
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26 |
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27 import com.sun.c1x.ir.*; |
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28 import com.sun.c1x.util.*; |
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29 |
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30 /** |
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31 * A utility for printing compiler debug and informational output to an output stream. |
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32 * |
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33 * A {@link LogStream} instance maintains an internal buffer that is flushed to the underlying |
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34 * output stream every time one of the {@code println} methods is invoked, or a newline character |
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35 * ({@code '\n'}) is written. |
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36 * |
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37 * All of the {@code print} and {@code println} methods return the {code LogStream} instance |
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38 * on which they were invoked. This allows chaining of these calls to mitigate use of String |
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39 * concatenation by the caller. |
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40 * |
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41 * A {@code LogStream} maintains a current {@linkplain #indentationLevel() indentation} level. |
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42 * Each line of output written to this stream has {@code n} spaces prefixed to it where |
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43 * {@code n} is the value that would be returned by {@link #indentationLevel()} when the first |
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44 * character of a new line is written. |
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45 * |
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46 * A {@code LogStream} maintains a current {@linkplain #position() position} for the current |
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47 * line being written. This position can be advanced to a specified position by |
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48 * {@linkplain #fillTo(int, char) filling} this stream with a given character. |
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49 * |
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50 * @author Doug Simon |
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51 */ |
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52 public class LogStream { |
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53 |
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54 /** |
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55 * Null output stream that simply swallows any output sent to it. |
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56 */ |
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57 public static final LogStream SINK = new LogStream(); |
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58 |
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59 private LogStream() { |
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60 this.ps = null; |
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61 this.lineBuffer = null; |
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62 } |
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63 |
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64 /** |
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65 * The output stream to which this log stream writes. |
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66 */ |
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67 private final PrintStream ps; |
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68 |
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69 private final StringBuilder lineBuffer; |
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70 private int indentationLevel; |
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71 private char indentation = ' '; |
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72 private boolean indentationDisabled; |
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73 |
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74 /** |
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75 * The system dependent line separator. |
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76 */ |
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77 public static final String LINE_SEPARATOR = System.getProperty("line.separator"); |
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78 |
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79 /** |
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80 * Creates a new log stream. |
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81 * |
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82 * @param os the underlying output stream to which prints are sent |
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83 */ |
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84 public LogStream(OutputStream os) { |
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85 ps = os instanceof PrintStream ? (PrintStream) os : new PrintStream(os); |
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86 lineBuffer = new StringBuilder(100); |
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87 } |
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88 |
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89 /** |
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90 * Creates a new log stream that shares the same {@linkplain #ps output stream} as a given {@link LogStream}. |
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91 * |
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92 * @param log a LogStream whose output stream is shared with this one |
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93 */ |
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94 public LogStream(LogStream log) { |
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95 ps = log.ps; |
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96 lineBuffer = new StringBuilder(100); |
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97 } |
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98 |
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99 /** |
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100 * Prepends {@link #indentation} to the current output line until its write position is equal to the |
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101 * current {@linkplain #indentationLevel()} level. |
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102 */ |
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103 private void indent() { |
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104 if (ps != null) { |
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105 if (!indentationDisabled && indentationLevel != 0) { |
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106 while (lineBuffer.length() < indentationLevel) { |
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107 lineBuffer.append(indentation); |
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108 } |
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109 } |
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110 } |
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111 } |
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112 |
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113 private LogStream flushLine(boolean withNewline) { |
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114 if (ps != null) { |
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115 if (withNewline) { |
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116 lineBuffer.append(LINE_SEPARATOR); |
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117 } else { |
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118 assert lineBuffer.indexOf(LINE_SEPARATOR, lineBuffer.length() - LINE_SEPARATOR.length()) != -1; |
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119 } |
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120 ps.print(lineBuffer.toString()); |
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121 ps.flush(); |
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122 lineBuffer.setLength(0); |
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123 } |
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124 return this; |
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125 } |
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126 |
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127 /** |
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128 * Flushes the stream. This is done by terminating the current line if it is not at position 0 |
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129 * and then flushing the underlying output stream. |
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130 */ |
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131 public void flush() { |
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132 if (ps != null) { |
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133 if (lineBuffer.length() != 0) { |
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134 flushLine(true); |
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135 } |
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136 ps.flush(); |
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137 } |
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138 } |
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139 |
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140 /** |
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141 * Gets the current column position of this log stream. |
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142 * |
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143 * @return the current column position of this log stream |
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144 */ |
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145 public int position() { |
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146 return lineBuffer == null ? 0 : lineBuffer.length(); |
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147 |
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148 } |
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149 |
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150 /** |
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151 * Gets the current indentation level for this log stream. |
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152 * |
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153 * @return the current indentation level for this log stream. |
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154 */ |
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155 public int indentationLevel() { |
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156 return indentationLevel; |
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157 } |
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158 |
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159 /** |
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160 * Adjusts the current indentation level of this log stream. |
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161 * |
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162 * @param delta |
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163 */ |
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164 public void adjustIndentation(int delta) { |
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165 if (delta < 0) { |
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166 indentationLevel = Math.max(0, indentationLevel + delta); |
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167 } else { |
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168 indentationLevel += delta; |
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169 } |
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170 } |
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171 |
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172 /** |
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173 * Gets the current indentation character of this log stream. |
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174 */ |
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175 public char indentation() { |
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176 return indentation; |
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177 } |
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178 |
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179 public void disableIndentation() { |
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180 indentationDisabled = true; |
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181 } |
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182 |
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183 public void enableIndentation() { |
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184 indentationDisabled = false; |
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185 } |
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186 |
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187 /** |
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188 * Sets the character used for indentation. |
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189 */ |
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190 public void setIndentation(char c) { |
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191 indentation = c; |
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192 } |
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193 |
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194 /** |
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195 * Advances this stream's {@linkplain #position() position} to a given position by |
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196 * repeatedly appending a given character as necessary. |
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197 * |
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198 * @param position the position to which this stream's position will be advanced |
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199 * @param filler the character used to pad the stream |
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200 */ |
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201 public LogStream fillTo(int position, char filler) { |
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202 if (ps != null) { |
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203 indent(); |
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204 while (lineBuffer.length() < position) { |
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205 lineBuffer.append(filler); |
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206 } |
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207 } |
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208 return this; |
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209 } |
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210 |
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211 /** |
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212 * Writes a boolean value to this stream as {@code "true"} or {@code "false"}. |
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213 * |
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214 * @param b the value to be printed |
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215 * @return this {@link LogStream} instance |
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216 */ |
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217 public LogStream print(boolean b) { |
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218 if (ps != null) { |
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219 indent(); |
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220 lineBuffer.append(b); |
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221 } |
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222 return this; |
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223 } |
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224 |
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225 /** |
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226 * Writes a boolean value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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227 * |
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228 * @param b the value to be printed |
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229 * @return this {@link LogStream} instance |
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230 */ |
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231 public LogStream println(boolean b) { |
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232 if (ps != null) { |
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233 indent(); |
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234 lineBuffer.append(b); |
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235 return flushLine(true); |
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236 } |
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237 return this; |
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238 } |
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239 |
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240 /** |
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241 * Writes a character value to this stream. |
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242 * |
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243 * @param c the value to be printed |
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244 * @return this {@link LogStream} instance |
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245 */ |
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246 public LogStream print(char c) { |
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247 if (ps != null) { |
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248 indent(); |
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249 lineBuffer.append(c); |
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250 if (c == '\n') { |
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251 if (lineBuffer.indexOf(LINE_SEPARATOR, lineBuffer.length() - LINE_SEPARATOR.length()) != -1) { |
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252 flushLine(false); |
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253 } |
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254 } |
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255 } |
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256 return this; |
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257 } |
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258 |
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259 /** |
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260 * Writes a character value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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261 * |
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262 * @param c the value to be printed |
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263 * @return this {@link LogStream} instance |
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264 */ |
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265 public LogStream println(char c) { |
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266 if (ps != null) { |
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267 indent(); |
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268 lineBuffer.append(c); |
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269 flushLine(true); |
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270 } |
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271 return this; |
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272 } |
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273 |
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274 /** |
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275 * Prints an int value. |
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276 * |
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277 * @param i the value to be printed |
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278 * @return this {@link LogStream} instance |
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279 */ |
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280 public LogStream print(int i) { |
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281 if (ps != null) { |
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282 indent(); |
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283 lineBuffer.append(i); |
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284 } |
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285 return this; |
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286 } |
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287 |
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288 /** |
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289 * Writes an int value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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290 * |
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291 * @param i the value to be printed |
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292 * @return this {@link LogStream} instance |
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293 */ |
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294 public LogStream println(int i) { |
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295 if (ps != null) { |
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296 indent(); |
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297 lineBuffer.append(i); |
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298 return flushLine(true); |
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299 } |
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300 return this; |
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301 } |
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302 |
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303 /** |
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304 * Writes a float value to this stream. |
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305 * |
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306 * @param f the value to be printed |
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307 * @return this {@link LogStream} instance |
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308 */ |
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309 public LogStream print(float f) { |
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310 if (ps != null) { |
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311 indent(); |
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312 lineBuffer.append(f); |
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313 } |
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314 return this; |
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315 } |
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316 |
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317 /** |
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318 * Writes a float value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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319 * |
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320 * @param f the value to be printed |
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321 * @return this {@link LogStream} instance |
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322 */ |
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323 public LogStream println(float f) { |
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324 if (ps != null) { |
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325 indent(); |
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326 lineBuffer.append(f); |
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327 return flushLine(true); |
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328 } |
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329 return this; |
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330 } |
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331 |
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332 /** |
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333 * Writes a long value to this stream. |
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334 * |
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335 * @param l the value to be printed |
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336 * @return this {@link LogStream} instance |
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337 */ |
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338 public LogStream print(long l) { |
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339 if (ps != null) { |
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340 indent(); |
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341 lineBuffer.append(l); |
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342 } |
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343 return this; |
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344 } |
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345 |
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346 /** |
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347 * Writes a long value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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348 * |
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349 * @param l the value to be printed |
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350 * @return this {@link LogStream} instance |
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351 */ |
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352 public LogStream println(long l) { |
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353 if (ps != null) { |
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354 indent(); |
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355 lineBuffer.append(l); |
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356 return flushLine(true); |
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357 } |
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358 return this; |
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359 } |
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360 |
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361 /** |
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362 * Writes a double value to this stream. |
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363 * |
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364 * @param d the value to be printed |
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365 * @return this {@link LogStream} instance |
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366 */ |
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367 public LogStream print(double d) { |
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368 if (ps != null) { |
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369 indent(); |
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370 lineBuffer.append(d); |
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371 } |
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372 return this; |
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373 } |
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374 |
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375 /** |
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376 * Writes a double value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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377 * |
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378 * @param d the value to be printed |
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379 * @return this {@link LogStream} instance |
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380 */ |
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381 public LogStream println(double d) { |
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382 if (ps != null) { |
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383 indent(); |
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384 lineBuffer.append(d); |
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385 return flushLine(true); |
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386 } |
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387 return this; |
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388 } |
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389 |
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390 /** |
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391 * Writes a {@code String} value to this stream. This method ensures that the {@linkplain #position() position} |
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392 * of this stream is updated correctly with respect to any {@linkplain #LINE_SEPARATOR line separators} |
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393 * present in {@code s}. |
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394 * |
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395 * @param s the value to be printed |
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396 * @return this {@link LogStream} instance |
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397 */ |
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398 public LogStream print(String s) { |
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399 if (ps != null) { |
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400 if (s == null) { |
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401 indent(); |
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402 lineBuffer.append(s); |
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403 return this; |
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404 } |
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405 |
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406 int index = 0; |
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407 int next = s.indexOf(LINE_SEPARATOR, index); |
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408 while (index < s.length()) { |
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409 indent(); |
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410 if (next > index) { |
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411 lineBuffer.append(s.substring(index, next)); |
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412 flushLine(true); |
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413 index = next + LINE_SEPARATOR.length(); |
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414 next = s.indexOf(LINE_SEPARATOR, index); |
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415 } else { |
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416 lineBuffer.append(s.substring(index)); |
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417 break; |
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418 } |
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419 } |
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420 } |
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421 return this; |
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422 } |
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423 |
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424 /** |
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425 * Writes a {@code String} value to this stream followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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426 * |
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427 * @param s the value to be printed |
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428 * @return this {@link LogStream} instance |
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429 */ |
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430 public LogStream println(String s) { |
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431 if (ps != null) { |
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432 print(s); |
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433 flushLine(true); |
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434 } |
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435 return this; |
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436 } |
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437 |
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438 /** |
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439 * Writes a formatted string to this stream. |
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440 * |
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441 * @param format a format string as described in {@link String#format(String, Object...)} |
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442 * @param args the arguments to be formatted |
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443 * @return this {@link LogStream} instance |
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444 */ |
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445 public LogStream printf(String format, Object... args) { |
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446 if (ps != null) { |
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447 print(String.format(format, args)); |
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448 } |
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449 return this; |
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450 } |
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451 |
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452 /** |
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453 * Writes an instruction formatted as a {@linkplain com.sun.c1x.util.Util#valueString(com.sun.c1x.ir.Value) value} to this stream. |
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454 * |
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455 * @param value the instruction to print |
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456 * @return this {@code LogStream} instance |
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457 */ |
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458 public LogStream print(Value value) { |
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459 if (ps != null) { |
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460 indent(); |
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461 lineBuffer.append(Util.valueString(value)); |
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462 } |
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463 return this; |
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464 } |
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465 |
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466 /** |
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467 * Writes an instruction formatted as a {@linkplain com.sun.c1x.util.Util#valueString(com.sun.c1x.ir.Value) value} to this stream |
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468 * followed by a {@linkplain #LINE_SEPARATOR line separator}. |
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469 * |
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470 * @param value the instruction to print |
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471 * @return this {@code LogStream} instance |
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472 */ |
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473 public LogStream println(Value value) { |
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474 if (ps != null) { |
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475 print(value); |
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476 flushLine(true); |
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477 } |
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478 return this; |
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479 } |
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|
480 |
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481 /** |
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482 * Writes a {@linkplain #LINE_SEPARATOR line separator} to this stream. |
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parents:
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483 * |
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484 * @return this {@code LogStream} instance |
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485 */ |
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486 public LogStream println() { |
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parents:
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487 if (ps != null) { |
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488 indent(); |
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parents:
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489 flushLine(true); |
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parents:
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490 } |
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Pull over of compiler from maxine repository.
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parents:
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491 return this; |
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Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
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|
492 } |
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Pull over of compiler from maxine repository.
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493 } |