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annotate gen/configfile.cpp @ 1103:b30fe7e1dbb9

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- Updated to DMD frontend 1.041. - Removed dmd/inifile.c , it's not under a free license, replaced with libconfig based config file.
author Tomas Lindquist Olsen <tomas.l.olsen gmail.com>
date Thu, 12 Mar 2009 20:37:27 +0100
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children 454f0c8acc4b
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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 p.appendComponent(filename);
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45
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46 if (!p.exists())
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47 {
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48 // 4) try next to the executable
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49 p = sys::Path::GetMainExecutable(argv0, mainAddr);
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50 p.eraseComponent();
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51 p.appendComponent(filename);
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52 if (!p.exists())
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53 {
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54 // 5) fail load cfg, users still have the DFLAGS environment var
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55 std::cerr << "Error failed to locate the configuration file: " << filename << std::endl;
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56 return false;
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57 }
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58 }
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59 }
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60 }
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61
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62 try
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63 {
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64 // read the cfg
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65 cfg->readFile(p.c_str());
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66
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67 // make sure there's a default group
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68 if (!cfg->exists("default"))
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69 {
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70 std::cerr << "no default settings in configuration file" << std::endl;
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71 return false;
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72 }
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73 libconfig::Setting& root = cfg->lookup("default");
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74 if (!root.isGroup())
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75 {
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76 std::cerr << "default is not a group" << std::endl;
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77 return false;
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78 }
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79
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80 // handle switches
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81 if (root.exists("switches"))
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82 {
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83 libconfig::Setting& arr = cfg->lookup("default.switches");
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84 int len = arr.getLength();
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85 for (int i=0; i<len; i++)
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86 {
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87 const char* v = arr[i];
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88 switches.push_back(v);
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89 }
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90 }
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91
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92 }
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93 catch(libconfig::FileIOException& fioe)
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94 {
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95 std::cerr << "Error reading configuration file: " << filename << std::endl;
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96 return false;
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97 }
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98 catch(libconfig::ParseException& pe)
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99 {
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100 std::cerr << "Error parsing configuration file: " << filename
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101 << "(" << pe.getLine() << "): " << pe.getError() << std::endl;
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102 return false;
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103 }
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104 catch(...)
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105 {
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106 std::cerr << "Unknown exception caught!" << std::endl;
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107 return false;
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108 }
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109
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110 return true;
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111 }
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112