mirror of
git://projects.qi-hardware.com/gmenu2x.git
synced 2024-11-05 04:51:53 +02:00
Move instead of copy strings at the end of FileLister::browse
This takes a little trickery, which I wrapped and documented.
This commit is contained in:
parent
f1e92425ac
commit
46c64ea984
@ -60,6 +60,18 @@ void FileLister::setShowFiles(bool showFiles)
|
||||
this->showFiles = showFiles;
|
||||
}
|
||||
|
||||
static void moveNames(set<string, case_less>&& from, vector<string>& to)
|
||||
{
|
||||
to.reserve(from.size());
|
||||
for (string const& name : from) {
|
||||
// Casting away the const is necessary to make the move work.
|
||||
// It will leave the set in an invalid state where it contains multiple
|
||||
// empty strings, but since the set is an rvalue we don't care.
|
||||
to.emplace_back(move(const_cast<string&>(name)));
|
||||
}
|
||||
to.shrink_to_fit();
|
||||
}
|
||||
|
||||
void FileLister::browse(const string& path, bool clean)
|
||||
{
|
||||
set<string, case_less> directorySet;
|
||||
@ -68,6 +80,8 @@ void FileLister::browse(const string& path, bool clean)
|
||||
directorySet.insert(directories.begin(), directories.end());
|
||||
fileSet.insert(files.begin(), files.end());
|
||||
}
|
||||
directories.clear();
|
||||
files.clear();
|
||||
|
||||
if (showDirectories || showFiles) {
|
||||
DIR *dirp;
|
||||
@ -146,8 +160,8 @@ void FileLister::browse(const string& path, bool clean)
|
||||
closedir(dirp);
|
||||
}
|
||||
|
||||
directories = vector<string>(directorySet.begin(), directorySet.end());
|
||||
files = vector<string>(fileSet.begin(), fileSet.end());
|
||||
moveNames(move(directorySet), directories);
|
||||
moveNames(move(fileSet), files);
|
||||
}
|
||||
|
||||
unsigned int FileLister::size()
|
||||
|
Loading…
Reference in New Issue
Block a user