Mercurial > hg > truffle
annotate graal/com.oracle.jvmci.options/src/com/oracle/jvmci/options/OptionUtils.java @ 21765:a7a1b9b65bce
Small improvement and clean up of InstanceOfNode.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sun, 07 Jun 2015 00:47:10 +0200 |
parents | 47bebae7454f |
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1 /* |
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2 * Copyright (c) 2014, 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.oracle.jvmci.options; |
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24 |
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25 import java.util.*; |
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26 |
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27 public class OptionUtils { |
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28 |
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29 public interface OptionConsumer { |
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30 void set(OptionDescriptor desc, Object value); |
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31 } |
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32 |
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33 /** |
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34 * Parses a given option value specification. |
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35 * |
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36 * @param option the specification of an option and its value |
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37 * @param setter the object to notify of the parsed option and value. |
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38 */ |
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39 public static void parseOption(String option, OptionConsumer setter) { |
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40 SortedMap<String, OptionDescriptor> options = OptionsLoader.options; |
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41 Objects.requireNonNull(setter); |
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42 if (option.length() == 0) { |
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43 return; |
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44 } |
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45 |
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46 Object value = null; |
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47 String optionName = null; |
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48 String valueString = null; |
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49 |
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50 char first = option.charAt(0); |
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51 if (first == '+' || first == '-') { |
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52 optionName = option.substring(1); |
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53 value = (first == '+'); |
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54 } else { |
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55 int index = option.indexOf('='); |
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56 if (index == -1) { |
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57 optionName = option; |
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58 valueString = null; |
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59 } else { |
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60 optionName = option.substring(0, index); |
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61 valueString = option.substring(index + 1); |
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62 } |
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63 } |
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64 |
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65 OptionDescriptor desc = options.get(optionName); |
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66 if (desc == null) { |
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67 throw new IllegalArgumentException("Option '" + optionName + "' not found"); |
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68 } |
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69 |
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70 Class<?> optionType = desc.getType(); |
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71 |
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72 if (value == null) { |
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73 if (optionType == Boolean.TYPE || optionType == Boolean.class) { |
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74 throw new IllegalArgumentException("Boolean option '" + optionName + "' must use +/- prefix"); |
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75 } |
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76 |
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77 if (valueString == null) { |
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78 throw new IllegalArgumentException("Missing value for non-boolean option '" + optionName + "' must use " + optionName + "=<value> format"); |
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79 } |
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80 |
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81 if (optionType == Float.class) { |
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82 value = Float.parseFloat(valueString); |
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83 } else if (optionType == Double.class) { |
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84 value = Double.parseDouble(valueString); |
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85 } else if (optionType == Integer.class) { |
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86 value = Integer.valueOf((int) parseLong(valueString)); |
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87 } else if (optionType == Long.class) { |
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88 value = Long.valueOf(parseLong(valueString)); |
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89 } else if (optionType == String.class) { |
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90 value = valueString; |
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91 } else { |
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92 throw new IllegalArgumentException("Wrong value for option '" + optionName + "'"); |
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93 } |
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94 } else { |
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95 if (optionType != Boolean.class) { |
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96 throw new IllegalArgumentException("Non-boolean option '" + optionName + "' can not use +/- prefix. Use " + optionName + "=<value> format"); |
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97 } |
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98 } |
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99 |
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100 setter.set(desc, value); |
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101 } |
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102 |
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103 private static long parseLong(String v) { |
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104 String valueString = v.toLowerCase(); |
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105 long scale = 1; |
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106 if (valueString.endsWith("k")) { |
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107 scale = 1024L; |
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108 } else if (valueString.endsWith("m")) { |
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109 scale = 1024L * 1024L; |
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110 } else if (valueString.endsWith("g")) { |
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111 scale = 1024L * 1024L * 1024L; |
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112 } else if (valueString.endsWith("t")) { |
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113 scale = 1024L * 1024L * 1024L * 1024L; |
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114 } |
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115 |
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116 if (scale != 1) { |
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117 /* Remove trailing scale character. */ |
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118 valueString = valueString.substring(0, valueString.length() - 1); |
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119 } |
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120 |
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121 return Long.parseLong(valueString) * scale; |
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122 } |
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123 |
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124 /** |
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125 * Wraps some given text to one or more lines of a given maximum width. |
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126 * |
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127 * @param text text to wrap |
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128 * @param width maximum width of an output line, exception for words in {@code text} longer than |
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129 * this value |
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130 * @return {@code text} broken into lines |
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131 */ |
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132 private static List<String> wrap(String text, int width) { |
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133 List<String> lines = Collections.singletonList(text); |
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134 if (text.length() > width) { |
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135 String[] chunks = text.split("\\s+"); |
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136 lines = new ArrayList<>(); |
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137 StringBuilder line = new StringBuilder(); |
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138 for (String chunk : chunks) { |
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139 if (line.length() + chunk.length() > width) { |
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140 lines.add(line.toString()); |
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141 line.setLength(0); |
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142 } |
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143 if (line.length() != 0) { |
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144 line.append(' '); |
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145 } |
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146 String[] embeddedLines = chunk.split("%n", -2); |
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147 if (embeddedLines.length == 1) { |
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148 line.append(chunk); |
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149 } else { |
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150 for (int i = 0; i < embeddedLines.length; i++) { |
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151 line.append(embeddedLines[i]); |
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152 if (i < embeddedLines.length - 1) { |
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153 lines.add(line.toString()); |
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154 line.setLength(0); |
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155 } |
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156 } |
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157 } |
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158 } |
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159 if (line.length() != 0) { |
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160 lines.add(line.toString()); |
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161 } |
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162 } |
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163 return lines; |
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164 } |
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165 |
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166 public static void printFlags(SortedMap<String, OptionDescriptor> options, String prefix) { |
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167 System.out.println("[List of " + prefix + " options]"); |
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168 SortedMap<String, OptionDescriptor> sortedOptions = options; |
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169 for (Map.Entry<String, OptionDescriptor> e : sortedOptions.entrySet()) { |
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170 e.getKey(); |
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171 OptionDescriptor desc = e.getValue(); |
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172 Object value = desc.getOptionValue().getValue(); |
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173 List<String> helpLines = wrap(desc.getHelp(), 70); |
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174 System.out.println(String.format("%9s %-40s = %-14s %s", desc.getType().getSimpleName(), e.getKey(), value, helpLines.get(0))); |
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175 for (int i = 1; i < helpLines.size(); i++) { |
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176 System.out.println(String.format("%67s %s", " ", helpLines.get(i))); |
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177 } |
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178 } |
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179 |
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180 System.exit(0); |
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181 } |
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182 } |