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annotate gen/configfile.cpp @ 1531:7120a74e9ae2

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Remove duplicated code This was implemented for windows in llvm r73379
author Benjamin Kramer <benny.kra@gmail.com>
date Sat, 11 Jul 2009 13:58:23 +0200
parents cd4478b47b10
children 49ae9728bea4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include <iostream>
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2 #include <string>
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3 #include <cassert>
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4 #include <cstring>
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5
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6 #include "llvm/System/Path.h"
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7
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8 #include "libconfig.h++"
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9
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10 #include "gen/configfile.h"
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11
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12 #include "mars.h"
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13
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14 namespace sys = llvm::sys;
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15
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16 ConfigFile::ConfigFile()
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17 {
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18 cfg = new libconfig::Config;
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19 }
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20
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21 ConfigFile::~ConfigFile()
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22 {
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23 delete cfg;
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24 }
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25
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26
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27 bool ConfigFile::locate(sys::Path& p, const char* argv0, void* mainAddr, const char* filename)
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28 {
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29 // 1) try the current working dir
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30 p = sys::Path::GetCurrentDirectory();
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31 p.appendComponent(filename);
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32 if (p.exists())
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33 return true;
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34
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35 // 2) try the user home dir
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36 p = sys::Path::GetUserHomeDirectory();
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37 p.appendComponent(filename);
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38 if (p.exists())
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39 return true;
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40
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41 // 3) try the install-prefix/etc
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42 p = sys::Path(LDC_INSTALL_PREFIX);
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43 #if !_WIN32
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44 // Does Windows need something similar?
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45 p.appendComponent("etc");
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46 #endif
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47 p.appendComponent(filename);
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48 if (p.exists())
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49 return true;
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50
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51 #if !_WIN32
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52 // Does Windows need something similar to these?
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54 // 4) try the install-prefix/etc/ldc
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55 p = sys::Path(LDC_INSTALL_PREFIX);
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56 p.appendComponent("etc");
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57 p.appendComponent("ldc");
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58 p.appendComponent(filename);
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59 if (p.exists())
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60 return true;
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61
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62 // 5) try /etc (absolute path)
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63 p = sys::Path("/etc");
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64 p.appendComponent(filename);
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65 if (p.exists())
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66 return true;
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67
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68 // 6) try /etc/ldc (absolute path)
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69 p = sys::Path("/etc/ldc");
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70 p.appendComponent(filename);
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71 if (p.exists())
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72 return true;
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73 #endif
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74
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75 // 7) try next to the executable
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76 p = sys::Path::GetMainExecutable(argv0, mainAddr);
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77 p.eraseComponent();
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78 p.appendComponent(filename);
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79 if (p.exists())
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80 return true;
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81
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82 return false;
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83 }
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84
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85 bool ConfigFile::read(const char* argv0, void* mainAddr, const char* filename)
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86 {
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87 sys::Path p;
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88 if (!locate(p, argv0, mainAddr, filename))
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89 {
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90 // failed to find cfg, users still have the DFLAGS environment var
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91 std::cerr << "Error failed to locate the configuration file: " << filename << std::endl;
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92 return false;
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93 }
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94
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95 // save config file path for -v output
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96 pathstr = p.toString();
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97
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98 try
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99 {
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100 // read the cfg
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101 cfg->readFile(p.c_str());
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102
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103 // make sure there's a default group
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104 if (!cfg->exists("default"))
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105 {
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106 std::cerr << "no default settings in configuration file" << std::endl;
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107 return false;
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108 }
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109 libconfig::Setting& root = cfg->lookup("default");
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110 if (!root.isGroup())
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111 {
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112 std::cerr << "default is not a group" << std::endl;
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113 return false;
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114 }
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115
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116 // handle switches
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117 if (root.exists("switches"))
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118 {
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119 std::string binpathkey = "%%ldcbinarypath%%";
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120
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121 std::string binpath = sys::Path::GetMainExecutable(argv0, mainAddr).getDirname();
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122
1103
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123 libconfig::Setting& arr = cfg->lookup("default.switches");
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124 int len = arr.getLength();
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125 for (int i=0; i<len; i++)
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126 {
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127 std::string v = arr[i];
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128
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129 // replace binpathkey with binpath
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130 size_t p;
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131 while (std::string::npos != (p = v.find(binpathkey)))
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132 v.replace(p, binpathkey.size(), binpath);
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133
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134 switches.push_back(strdup(v.c_str()));
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135 }
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136 }
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137
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138 }
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139 catch(libconfig::FileIOException& fioe)
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140 {
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141 std::cerr << "Error reading configuration file: " << filename << std::endl;
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142 return false;
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143 }
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144 catch(libconfig::ParseException& pe)
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145 {
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146 std::cerr << "Error parsing configuration file: " << filename
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147 << "(" << pe.getLine() << "): " << pe.getError() << std::endl;
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148 return false;
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149 }
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150 catch(...)
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151 {
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152 std::cerr << "Unknown exception caught!" << std::endl;
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153 return false;
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154 }
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155
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156 return true;
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157 }
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158