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annotate trunk/src/dil/SettingsLoader.d @ 778:78be32e3e157

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Implemented conditional compilation.
author Aziz K?ksal <aziz.koeksal@gmail.com>
date Wed, 20 Feb 2008 22:09:29 +0100
parents 9c47f377ca0b
children
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1 /++
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2 Author: Aziz Köksal
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3 License: GPL3
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4 +/
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5 module dil.SettingsLoader;
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6
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7 import dil.Settings;
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8 import dil.Messages;
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9 import dil.ast.Node, dil.ast.Declarations, dil.ast.Expressions;
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10 import dil.semantic.Module;
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11 import dil.semantic.Pass1;
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12 import dil.semantic.Symbol;
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13 import dil.semantic.Symbols;
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14 import dil.Information;
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15 import dil.Compilation;
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16 import common;
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17
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18 import tango.io.FilePath;
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19
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20 class SettingsLoader
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21 {
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22 InfoManager infoMan;
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23 Module mod; /// Current module.
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24
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25 this(InfoManager infoMan)
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26 {
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27 this.infoMan = infoMan;
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28 }
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29
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30 static SettingsLoader opCall(InfoManager infoMan)
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31 {
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32 return new SettingsLoader(infoMan);
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33 }
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34
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35 void error(Token* token, char[] formatMsg, ...)
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36 {
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37 auto location = token.getErrorLocation();
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38 auto msg = Format(_arguments, _argptr, formatMsg);
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39 infoMan ~= new SemanticError(location, msg);
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40 }
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41
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42 T getValue(T)(char[] name)
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43 {
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44 auto var = mod.lookup(name);
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45 if (!var) // Returning T.init instead of null, because dmd gives an error.
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46 return error(mod.firstToken, "variable '{}' is not defined", name), T.init;
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47 auto t = var.node.begin;
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48 if (!var.isVariable)
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49 return error(t, "'{}' is not a variable declaration", name), T.init;
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50 auto value = var.to!(Variable).value;
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51 if (!value)
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52 return error(t, "'{}' variable has no value set", name), T.init;
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53 T val = value.Is!(T); // Try casting to T.
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54 if (!val)
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55 error(value.begin, "the value of '{}' is not of type {}", name, typeof(T).stringof);
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56 return val;
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57 }
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58
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59 T castTo(T)(Node n)
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60 {
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61 char[] type;
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62 is(T == StringExpression) && (type = "char[]");
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63 if (!n.Is!(T))
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64 error(n.begin, "expression is not of type {}", type);
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65 return n.Is!(T);
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66 }
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67
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68 void load()
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69 {
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70 scope execPath = new FilePath(GetExecutableFilePath());
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71 execPath = new FilePath(execPath.folder());
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72
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73 // Load config.d
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74 auto filePath = resolvePath(execPath, "config.d");
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75 mod = new Module(filePath, infoMan);
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76 mod.parse();
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77
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78 if (mod.hasErrors)
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79 return;
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80
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81 auto context = new CompilationContext;
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82 auto pass1 = new SemanticPass1(mod, context);
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83 pass1.start();
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84
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85 if (auto array = getValue!(ArrayInitExpression)("version_ids"))
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86 foreach (value; array.values)
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87 if (auto str = castTo!(StringExpression)(value))
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88 GlobalSettings.versionIds ~= str.getString();
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89 if (auto val = getValue!(StringExpression)("langfile"))
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90 GlobalSettings.langFile = val.getString();
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91 if (auto array = getValue!(ArrayInitExpression)("import_paths"))
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92 foreach (value; array.values)
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93 if (auto str = castTo!(StringExpression)(value))
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94 GlobalSettings.importPaths ~= str.getString();
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95 if (auto array = getValue!(ArrayInitExpression)("ddoc_files"))
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96 foreach (value; array.values)
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97 if (auto str = castTo!(StringExpression)(value))
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98 GlobalSettings.ddocFilePaths ~= resolvePath(execPath, str.getString());
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99 if (auto val = getValue!(StringExpression)("xml_map"))
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100 GlobalSettings.xmlMapFile = val.getString();
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101 if (auto val = getValue!(StringExpression)("html_map"))
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102 GlobalSettings.htmlMapFile = val.getString();
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103 if (auto val = getValue!(StringExpression)("lexer_error"))
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104 GlobalSettings.lexerErrorFormat = val.getString();
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105 if (auto val = getValue!(StringExpression)("parser_error"))
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106 GlobalSettings.parserErrorFormat = val.getString();
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107 if (auto val = getValue!(StringExpression)("semantic_error"))
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108 GlobalSettings.semanticErrorFormat = val.getString();
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109
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110 // Load language file.
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111 filePath = resolvePath(execPath, GlobalSettings.langFile);
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112 mod = new Module(filePath);
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113 mod.parse();
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114
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115 if (mod.hasErrors)
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116 return;
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117
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118 pass1 = new SemanticPass1(mod, context);
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119 pass1.start();
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120
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121 if (auto array = getValue!(ArrayInitExpression)("messages"))
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122 {
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123 char[][] messages;
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124 foreach (value; array.values)
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125 if (auto str = castTo!(StringExpression)(value))
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126 messages ~= str.getString();
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127 if (messages.length != MID.max+1)
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128 error(mod.firstToken,
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129 "messages table in {} must exactly have {} entries, but not {}.",
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130 filePath, MID.max+1, messages.length);
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131 GlobalSettings.messages = messages;
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132 dil.Messages.SetMessages(messages);
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133 }
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134 if (auto val = getValue!(StringExpression)("lang_code"))
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135 GlobalSettings.langCode = val.getString();
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136 }
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137 }
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138
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139 class TagMapLoader : SettingsLoader
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140 {
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141 this(InfoManager infoMan)
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142 {
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143 super(infoMan);
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144 }
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145
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146 static TagMapLoader opCall(InfoManager infoMan)
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147 {
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148 return new TagMapLoader(infoMan);
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149 }
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150
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151 string[string] load(string filePath)
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152 {
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153 mod = new Module(filePath, infoMan);
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154 mod.parse();
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155 if (mod.hasErrors)
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156 return null;
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157
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158 auto context = new CompilationContext;
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159 auto pass1 = new SemanticPass1(mod, context);
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160 pass1.start();
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161
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162 string[string] map;
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163 if (auto array = getValue!(ArrayInitExpression)("map"))
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164 foreach (i, value; array.values)
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165 {
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166 auto key = array.keys[i];
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167 if (auto valExp = castTo!(StringExpression)(value))
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168 if (!key)
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169 error(value.begin, "expected key : value");
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170 else if (auto keyExp = castTo!(StringExpression)(key))
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171 map[keyExp.getString()] = valExp.getString();
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172 }
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173 return map;
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174 }
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175 }
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176
721
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177 string resolvePath(FilePath execPath, string filePath)
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178 {
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179 if ((new FilePath(filePath)).isAbsolute())
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180 return filePath;
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181 return execPath.dup.append(filePath).toString();
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182 }
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183
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184 version(Windows)
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185 {
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186 private extern(Windows) uint GetModuleFileNameA(void*, char*, uint);
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187 /// Get the fully qualified path to this executable.
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188 char[] GetExecutableFilePath()
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189 {
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190 alias GetModuleFileNameA GetModuleFileName;
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191 char[] buffer = new char[256];
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192 uint count;
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193
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194 while (1)
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195 {
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196 if (buffer is null)
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197 return null;
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198
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199 count = GetModuleFileName(null, buffer.ptr, buffer.length);
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200 if (count == 0)
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201 return null;
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202 if (buffer.length != count && buffer[count] == 0)
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203 break;
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204 // Increase size of buffer
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205 buffer.length = buffer.length * 2;
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206 }
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207 assert(buffer[count] == 0);
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208 // Reduce buffer to the actual length of the string (excluding '\0'.)
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209 if (count < buffer.length)
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210 buffer.length = count;
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211 return buffer;
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212 }
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213 }
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214 else version(linux)
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215 {
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216 private extern(C) size_t readlink(char* path, char* buf, size_t bufsize);
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217 /// Get the fully qualified path to this executable.
513
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218 char[] GetExecutableFilePath()
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219 {
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220 char[] buffer = new char[256];
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221 size_t count;
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222
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223 while (1)
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224 {
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225 // This won't work on very old Linux systems.
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226 count = readlink("/proc/self/exe".ptr, buffer.ptr, buffer.length);
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227 if (count == -1)
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228 return null;
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229 if (count < buffer.length)
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230 break;
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231 buffer.length = buffer.length * 2;
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232 }
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233 buffer.length = count;
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234 return buffer;
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235 }
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236 }
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237 else
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238 static assert(0, "GetExecutableFilePath() is not implemented on this platform.");