(C++) GetFoldersInFolder

 

Technical facts

 

Operating system(s) or programming environment(s)

• Lubuntu 15.04 (vivid)

IDE(s):

• Qt Creator 3.1.1

Project type:

• Console application

C++ standard:

• C++98

Compiler(s):

• G++ 4.9.2

Libraries used:

• STL: GNU ISO C++ Library, version 4.9.2

 

 

 

 

 

Qt project file: ./CppGetFoldersInFolder/CppGetFoldersInFolder.pro

 

---

include(../../ConsoleApplication.pri) #Or use the code below # QT += core # QT += gui # greaterThan(QT_MAJOR_VERSION, 4): QT += widgets # CONFIG   += console # CONFIG   -= app_bundle # TEMPLATE = app # CONFIG(release, debug|release) { #   DEFINES += NDEBUG NTRACE_BILDERBIKKEL # } # QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++ # unix { #   QMAKE_CXXFLAGS += -Werror # } SOURCES += main.cpp

 

 

 

 

 

./CppGetFoldersInFolder/main.cpp

 

---

#include <cassert> #include <fstream> #include <iostream> #include <vector> #include <string> #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #include <QDir> #pragma GCC diagnostic pop ///Obtain all files in a folder including thos in a subfolder //From http://www.richelbilderbeek.nl/CppGetFoldersInFolder.htm const std::vector<std::string> GetFoldersInFolder(const std::string& folder) {   QDir dir(folder.c_str());   dir.setFilter(QDir::Dirs | QDir::NoDotAndDotDot   );   const QFileInfoList list = dir.entryInfoList();   //Convert QFileInfoList to std::vector<std::string> of filenames   std::vector<std::string> v;   const int size = list.size();   for (int i = 0; i != size; ++i)   {     const std::string file_name = list.at(i).fileName().toStdString();     v.push_back(file_name);   }   return v; } const std::string GetPathSeperator() noexcept {   #ifndef WIN32   return "\\";   #else   return "/";   #endif } bool IsFolder(const std::string& filename) noexcept {   return QDir(filename.c_str()).exists(); } bool IsRegularFile(const std::string& filename) noexcept {   return !QDir(filename.c_str()).exists() && QFile::exists(filename.c_str()); } int main() {   //Use the following structure:   // - local.txt   // - my_folder/in_folder.txt   // - my_folder/my_subfolder/in_subfolder.txt   const std::string local_filename { "local.txt" };   const std::string folder_name { "my_folder" };   const std::string in_folder_filename { "in_folder.txt" };   const std::string subfolder_name { "my_subfolder" };   const std::string in_subfolder_filename { "in_subfolder.txt" };   //File and folder creation   {     {       const std::string filename { local_filename };       std::ofstream f(filename.c_str());     }     assert(IsRegularFile(local_filename));     {       const std::string cmd = "mkdir " + folder_name;       const int error = std::system(cmd.c_str());       assert(!error);     }     assert(IsFolder(folder_name));     {       const std::string filename {           folder_name + GetPathSeperator()         + in_folder_filename       };       std::ofstream f(filename.c_str());     }     assert(IsRegularFile(folder_name + GetPathSeperator() + in_folder_filename));     {       const std::string cmd = "mkdir " + folder_name + GetPathSeperator() + subfolder_name;       const int error = std::system(cmd.c_str());       assert(!error);     }     assert(IsFolder(folder_name + GetPathSeperator() + subfolder_name));     {       const std::string filename {           folder_name + GetPathSeperator()         + subfolder_name + GetPathSeperator()         + in_subfolder_filename       };       std::ofstream f(filename.c_str());     }     assert(       IsRegularFile(           folder_name + GetPathSeperator()         + subfolder_name + GetPathSeperator()         + in_subfolder_filename       )     );   }   //Reading of the folder created   {     const std::vector<std::string> v {       GetFoldersInFolder(folder_name)     };     std::copy(v.begin(),v.end(),std::ostream_iterator<std::string>(std::cout,"\n"));     assert(v.size() == 1);     assert(       std::count(         v.begin(),v.end(),           subfolder_name       )       == 1     );   }   {     const std::vector<std::string> v {       GetFoldersInFolder(folder_name + GetPathSeperator() + subfolder_name)     };     std::copy(v.begin(),v.end(),std::ostream_iterator<std::string>(std::cout,"\n"));     assert(v.size() == 0);   } }