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comparison 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
parents
children 454f0c8acc4b
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1102:ae950bd712d3 1103:b30fe7e1dbb9
1 #include <iostream>
2 #include <string>
3 #include <cassert>
4
5 #include "llvm/System/Path.h"
6
7 #include "libconfig.h++"
8
9 #include "gen/configfile.h"
10
11 #include "mars.h"
12
13 namespace sys = llvm::sys;
14
15 ConfigFile::ConfigFile()
16 {
17 cfg = new libconfig::Config;
18 }
19
20 ConfigFile::~ConfigFile()
21 {
22 delete cfg;
23 }
24
25 bool ConfigFile::read(const char* argv0, void* mainAddr, const char* filename)
26 {
27
28 // try to find the config file
29
30 // 1) try the current working dir
31 sys::Path p = sys::Path::GetCurrentDirectory();
32 p.appendComponent(filename);
33
34 if (!p.exists())
35 {
36 // 2) try the user home dir
37 p = sys::Path::GetUserHomeDirectory();
38 p.appendComponent(filename);
39
40 if (!p.exists())
41 {
42 // 3) try the install-prefix/etc
43 p = sys::Path(LDC_INSTALL_PREFIX);
44 p.appendComponent(filename);
45
46 if (!p.exists())
47 {
48 // 4) try next to the executable
49 p = sys::Path::GetMainExecutable(argv0, mainAddr);
50 p.eraseComponent();
51 p.appendComponent(filename);
52 if (!p.exists())
53 {
54 // 5) fail load cfg, users still have the DFLAGS environment var
55 std::cerr << "Error failed to locate the configuration file: " << filename << std::endl;
56 return false;
57 }
58 }
59 }
60 }
61
62 try
63 {
64 // read the cfg
65 cfg->readFile(p.c_str());
66
67 // make sure there's a default group
68 if (!cfg->exists("default"))
69 {
70 std::cerr << "no default settings in configuration file" << std::endl;
71 return false;
72 }
73 libconfig::Setting& root = cfg->lookup("default");
74 if (!root.isGroup())
75 {
76 std::cerr << "default is not a group" << std::endl;
77 return false;
78 }
79
80 // handle switches
81 if (root.exists("switches"))
82 {
83 libconfig::Setting& arr = cfg->lookup("default.switches");
84 int len = arr.getLength();
85 for (int i=0; i<len; i++)
86 {
87 const char* v = arr[i];
88 switches.push_back(v);
89 }
90 }
91
92 }
93 catch(libconfig::FileIOException& fioe)
94 {
95 std::cerr << "Error reading configuration file: " << filename << std::endl;
96 return false;
97 }
98 catch(libconfig::ParseException& pe)
99 {
100 std::cerr << "Error parsing configuration file: " << filename
101 << "(" << pe.getLine() << "): " << pe.getError() << std::endl;
102 return false;
103 }
104 catch(...)
105 {
106 std::cerr << "Unknown exception caught!" << std::endl;
107 return false;
108 }
109
110 return true;
111 }
112