Mercurial > projects > ldc
view gen/configfile.cpp @ 1168:ab186e535e72
A different fix to #218 and DMD2682 that does not lead to constant folding regressions.
Fixes run/const_15, run/c/const_16_B.
The price is removing the lvalueness of struct literals. If it turns out too
much code depends on this behavior or we don't want to break with DMD, we
could keep struct literals as lvalues and instead convert struct literals used
as expression initializers into struct initializers.
author | Christian Kamm <kamm incasoftware de> |
---|---|
date | Sun, 29 Mar 2009 11:43:45 +0200 |
parents | 454f0c8acc4b |
children | b6e819244062 |
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#include <iostream> #include <string> #include <cassert> #include "llvm/System/Path.h" #include "libconfig.h++" #include "gen/configfile.h" #include "mars.h" namespace sys = llvm::sys; ConfigFile::ConfigFile() { cfg = new libconfig::Config; } ConfigFile::~ConfigFile() { delete cfg; } bool ConfigFile::read(const char* argv0, void* mainAddr, const char* filename) { // try to find the config file // 1) try the current working dir sys::Path p = sys::Path::GetCurrentDirectory(); p.appendComponent(filename); if (!p.exists()) { // 2) try the user home dir p = sys::Path::GetUserHomeDirectory(); p.appendComponent(filename); if (!p.exists()) { // 3) try the install-prefix/etc p = sys::Path(LDC_INSTALL_PREFIX); #if !_WIN32 // Does Window need something similar? p.appendComponent("etc"); #endif p.appendComponent(filename); if (!p.exists()) { // 4) try next to the executable p = sys::Path::GetMainExecutable(argv0, mainAddr); p.eraseComponent(); p.appendComponent(filename); if (!p.exists()) { // 5) fail load cfg, users still have the DFLAGS environment var std::cerr << "Error failed to locate the configuration file: " << filename << std::endl; return false; } } } } try { // read the cfg cfg->readFile(p.c_str()); // make sure there's a default group if (!cfg->exists("default")) { std::cerr << "no default settings in configuration file" << std::endl; return false; } libconfig::Setting& root = cfg->lookup("default"); if (!root.isGroup()) { std::cerr << "default is not a group" << std::endl; return false; } // handle switches if (root.exists("switches")) { libconfig::Setting& arr = cfg->lookup("default.switches"); int len = arr.getLength(); for (int i=0; i<len; i++) { const char* v = arr[i]; switches.push_back(v); } } } catch(libconfig::FileIOException& fioe) { std::cerr << "Error reading configuration file: " << filename << std::endl; return false; } catch(libconfig::ParseException& pe) { std::cerr << "Error parsing configuration file: " << filename << "(" << pe.getLine() << "): " << pe.getError() << std::endl; return false; } catch(...) { std::cerr << "Unknown exception caught!" << std::endl; return false; } return true; }