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annotate gen/configfile.cpp @ 1137:45d73f0a9b43

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Automated merge with http://hg.dsource.org/projects/ldc
author Christian Kamm <kamm incasoftware de>
date Tue, 24 Mar 2009 14:34:16 +0100
parents 454f0c8acc4b
children b6e819244062
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rev   line source
1103
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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
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5 #include "llvm/System/Path.h"
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6
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7 #include "libconfig.h++"
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8
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9 #include "gen/configfile.h"
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10
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11 #include "mars.h"
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12
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13 namespace sys = llvm::sys;
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14
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15 ConfigFile::ConfigFile()
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16 {
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17 cfg = new libconfig::Config;
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18 }
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19
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20 ConfigFile::~ConfigFile()
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21 {
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22 delete cfg;
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23 }
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24
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25 bool ConfigFile::read(const char* argv0, void* mainAddr, const char* filename)
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26 {
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27
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28 // try to find the config file
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29
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30 // 1) try the current working dir
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31 sys::Path p = sys::Path::GetCurrentDirectory();
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32 p.appendComponent(filename);
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33
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34 if (!p.exists())
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35 {
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36 // 2) try the user home dir
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37 p = sys::Path::GetUserHomeDirectory();
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38 p.appendComponent(filename);
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39
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40 if (!p.exists())
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41 {
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42 // 3) try the install-prefix/etc
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43 p = sys::Path(LDC_INSTALL_PREFIX);
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44 #if !_WIN32
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45 // Does Window need something similar?
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46 p.appendComponent("etc");
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47 #endif
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48 p.appendComponent(filename);
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49
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50 if (!p.exists())
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51 {
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52 // 4) try next to the executable
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53 p = sys::Path::GetMainExecutable(argv0, mainAddr);
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54 p.eraseComponent();
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55 p.appendComponent(filename);
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56 if (!p.exists())
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57 {
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58 // 5) fail load cfg, users still have the DFLAGS environment var
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59 std::cerr << "Error failed to locate the configuration file: " << filename << std::endl;
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60 return false;
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61 }
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62 }
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63 }
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64 }
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65
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66 try
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67 {
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68 // read the cfg
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69 cfg->readFile(p.c_str());
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70
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71 // make sure there's a default group
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72 if (!cfg->exists("default"))
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73 {
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74 std::cerr << "no default settings in configuration file" << std::endl;
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75 return false;
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76 }
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77 libconfig::Setting& root = cfg->lookup("default");
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78 if (!root.isGroup())
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79 {
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80 std::cerr << "default is not a group" << std::endl;
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81 return false;
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82 }
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83
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84 // handle switches
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85 if (root.exists("switches"))
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86 {
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87 libconfig::Setting& arr = cfg->lookup("default.switches");
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88 int len = arr.getLength();
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89 for (int i=0; i<len; i++)
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90 {
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91 const char* v = arr[i];
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92 switches.push_back(v);
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93 }
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94 }
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95
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96 }
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97 catch(libconfig::FileIOException& fioe)
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98 {
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99 std::cerr << "Error reading configuration file: " << filename << std::endl;
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100 return false;
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101 }
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102 catch(libconfig::ParseException& pe)
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103 {
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104 std::cerr << "Error parsing configuration file: " << filename
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105 << "(" << pe.getLine() << "): " << pe.getError() << std::endl;
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106 return false;
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107 }
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108 catch(...)
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109 {
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110 std::cerr << "Unknown exception caught!" << std::endl;
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111 return false;
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112 }
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113
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114 return true;
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115 }
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116