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Caching bin path

This commit is contained in:
Daniel Wolf 2016-09-18 22:00:08 +02:00
parent 0ab009e17a
commit cf13499158
1 changed files with 25 additions and 22 deletions
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45
src/platformTools.cpp
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@ -11,29 +11,32 @@ using boost::filesystem::path;
using std::string; using std::string;
path getBinPath() { path getBinPath() {
try { static const path binPath = [] {
// Determine path length try {
int pathLength = wai_getExecutablePath(nullptr, 0, nullptr); // Determine path length
if (pathLength == -1) { int pathLength = wai_getExecutablePath(nullptr, 0, nullptr);
throw std::runtime_error("Error determining path length."); if (pathLength == -1) {
} throw std::runtime_error("Error determining path length.");
}
// Get path // Get path
// Note: According to documentation, pathLength does *not* include the trailing zero. Actually, it does. // Note: According to documentation, pathLength does *not* include the trailing zero. Actually, it does.
// In case there are situations where it doesn't, we allocate one character more. // In case there are situations where it doesn't, we allocate one character more.
std::vector<char> buffer(pathLength + 1); std::vector<char> buffer(pathLength + 1);
if (wai_getExecutablePath(buffer.data(), buffer.size(), nullptr) == -1) { if (wai_getExecutablePath(buffer.data(), buffer.size(), nullptr) == -1) {
throw std::runtime_error("Error reading path."); throw std::runtime_error("Error reading path.");
} }
buffer[pathLength] = 0; buffer[pathLength] = 0;
// Convert to boost::filesystem::path // Convert to boost::filesystem::path
string pathString(buffer.data()); string pathString(buffer.data());
static path binPath(boost::filesystem::canonical(pathString).make_preferred()); static path binPath(boost::filesystem::canonical(pathString).make_preferred());
return binPath; return binPath;
} catch (...) { } catch (...) {
std::throw_with_nested(std::runtime_error("Could not determine path of bin directory.") ); std::throw_with_nested(std::runtime_error("Could not determine path of bin directory."));
} }
}();
return binPath;
} }
path getBinDirectory() { path getBinDirectory() {