Mercurial > hg > truffle
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultSourceSection.java @ 15064:f675818d9ad0
new getStackTrace and getCurrentFrame functionality in TruffleRuntime
author | Lukas Stadler <lukas.stadler@oracle.com> |
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date | Fri, 11 Apr 2014 11:53:11 +0200 |
parents | 5f532ea846fb |
children | c54f5fa05fd5 |
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1 /* |
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2 * Copyright (c) 2013, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 package com.oracle.truffle.api.impl; |
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26 |
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27 import com.oracle.truffle.api.*; |
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28 |
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29 /** |
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30 * Represents a contiguous text section within the source code of a guest language program. |
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31 */ |
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32 public class DefaultSourceSection implements SourceSection { |
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33 |
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34 private final Source source; |
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35 private final String identifier; |
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36 private final int startLine; |
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37 private final int startColumn; |
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38 private final int charIndex; |
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39 private final int charLength; |
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40 |
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41 /** |
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42 * Creates a new object representing a contiguous text section within the source code of a guest |
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43 * language program's text. |
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44 * <p> |
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45 * The starting location of the section is specified using two different coordinate: |
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46 * <ul> |
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47 * <li><b>(row, column)</b>: rows and columns are 1-based, so the first character in a source |
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48 * file is at position {@code (1,1)}.</li> |
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49 * <li><b>character index</b>: 0-based offset of the character from the beginning of the source, |
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50 * so the first character in a file is at index {@code 0}.</li> |
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51 * </ul> |
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52 * The <b>newline</b> that terminates each line counts as a single character for the purpose of |
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53 * a character index. The (row,column) coordinates of a newline character should never appear in |
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54 * a text section. |
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55 * <p> |
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56 * |
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57 * @param source object representing the complete source program that contains this section |
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58 * @param identifier an identifier used when printing the section |
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59 * @param startLine the 1-based number of the start line of the section |
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60 * @param startColumn the 1-based number of the start column of the section |
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61 * @param charIndex the 0-based index of the first character of the section |
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62 * @param charLength the length of the section in number of characters |
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63 */ |
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64 public DefaultSourceSection(Source source, String identifier, int startLine, int startColumn, int charIndex, int charLength) { |
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65 this.source = source; |
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66 this.identifier = identifier; |
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67 this.startLine = startLine; |
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68 this.startColumn = startColumn; |
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69 this.charIndex = charIndex; |
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70 this.charLength = charLength; |
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71 } |
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72 |
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73 public final Source getSource() { |
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74 return source; |
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75 } |
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76 |
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77 public final int getStartLine() { |
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78 return startLine; |
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79 } |
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80 |
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81 public final int getStartColumn() { |
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82 return startColumn; |
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83 } |
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84 |
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85 public final int getCharIndex() { |
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86 return charIndex; |
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87 } |
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88 |
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89 public final int getCharLength() { |
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90 return charLength; |
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91 } |
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92 |
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93 public final int getCharEndIndex() { |
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94 return charIndex + charLength; |
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95 } |
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96 |
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97 public final String getIdentifier() { |
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98 return identifier; |
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99 } |
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100 |
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101 public final String getCode() { |
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102 return getSource().getCode().substring(charIndex, charIndex + charLength); |
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103 } |
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104 |
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105 @Override |
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106 public String toString() { |
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107 return String.format("%s:%d", source.getName(), startLine); |
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108 } |
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109 |
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110 @Override |
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111 public int hashCode() { |
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112 final int prime = 31; |
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113 int result = 1; |
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114 result = prime * result + charIndex; |
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115 result = prime * result + charLength; |
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116 result = prime * result + ((identifier == null) ? 0 : identifier.hashCode()); |
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117 result = prime * result + ((source == null) ? 0 : source.hashCode()); |
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118 result = prime * result + startColumn; |
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119 result = prime * result + startLine; |
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120 return result; |
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121 } |
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122 |
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123 @Override |
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124 public boolean equals(Object obj) { |
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125 if (this == obj) { |
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126 return true; |
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127 } |
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128 if (obj == null) { |
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129 return false; |
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130 } |
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131 if (!(obj instanceof DefaultSourceSection)) { |
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132 return false; |
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133 } |
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134 DefaultSourceSection other = (DefaultSourceSection) obj; |
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135 if (charIndex != other.charIndex) { |
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136 return false; |
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137 } |
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138 if (charLength != other.charLength) { |
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139 return false; |
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140 } |
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141 if (identifier == null) { |
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142 if (other.identifier != null) { |
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143 return false; |
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144 } |
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145 } else if (!identifier.equals(other.identifier)) { |
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146 return false; |
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147 } |
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148 if (source == null) { |
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149 if (other.source != null) { |
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150 return false; |
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151 } |
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152 } else if (!source.equals(other.source)) { |
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153 return false; |
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154 } |
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155 if (startColumn != other.startColumn) { |
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156 return false; |
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157 } |
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158 if (startLine != other.startLine) { |
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159 return false; |
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160 } |
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161 return true; |
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162 } |
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163 |
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164 } |