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+---- Thread: [C] Recursively Display Contents In A Directory - Microsoft C++ (/showthread.php?tid=6046079)
Recursively Display Contents In A Directory - Microsoft C++ - gurlhackerclub - Feb 2, 2020
- Microsoft C++
Should I just use Boost?
Tried using std::experimental::filesystem, it seems screwed.
Code
using namespace std;
namespace fs = std::experimental::filesystem;The following code works, but does not search recursively
Code
#include <windows.h>
#include <tchar.h>
#include <shlobj.h>
#include <string.h>
#include <stdio.h>
#include <strsafe.h>
#pragma comment(lib, "User32.lib")
#include <iostream>
using namespace std;
void DisplayErrorBox(LPTSTR lpszFunction);
int _tmain(int argc, TCHAR* argv[])
{
WIN32_FIND_DATA ffd;
LARGE_INTEGER filesize;
TCHAR szDir[MAX_PATH];
HANDLE hFind = INVALID_HANDLE_VALUE;
DWORD dwError = 0;
TCHAR path[MAX_PATH];
TCHAR subpath[MAX_PATH];
// If the directory is not specified as a command-line argument,
// print usage.
if (SHGetFolderPath(NULL, CSIDL_PROFILE, NULL, 0, path) != S_OK)
{
cout << "I could not retrieve the user's home directory!\n";
}
else
{
}
// Prepare string for use with FindFile functions. First, copy the
// string to a buffer, then append '\*' to the directory name.
StringCchCopy(szDir, MAX_PATH, path);
StringCchCat(szDir, MAX_PATH, TEXT("\\*"));
// Find the first file in the directory.
hFind = FindFirstFile(szDir, &ffd);
if (INVALID_HANDLE_VALUE == hFind)
{
_tprintf(TEXT("FindFirstFile"));
return dwError;
}
// List all the files in the directory with some info about them.
do
{
if (ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
filesize.LowPart = ffd.nFileSizeLow;
filesize.HighPart = ffd.nFileSizeHigh;
_tprintf(TEXT(" %s\\%s +DIR \n"), path, ffd.cFileName);
}
else
{
filesize.LowPart = ffd.nFileSizeLow;
filesize.HighPart = ffd.nFileSizeHigh;
_tprintf(TEXT(" %s\\%s \n"),path, ffd.cFileName);
}
} while (FindNextFile(hFind, &ffd) != 0);
dwError = GetLastError();
if (dwError != ERROR_NO_MORE_FILES)
{
_tprintf(TEXT("FindFirstFile"));
}
FindClose(hFind);
return dwError;
}RE: Recursively Display Contents In A Directory - Microsoft C++ - m1n0r1tyrep0rt - Feb 2, 2020
Yeah that is not going to search recursively, because for recursion "you need to call yourself".
#include <string>
#include <functional>
#include <dirent.h>
void listFiles(const std::string &path, std::function<void(const std::string &)> cb) {
if (auto dir = opendir(path.c_str())) {
while (auto f = readdir(dir)) {
if (!f->d_name || f->d_name[0] == '.') continue;
if (f->d_type == DT_DIR)
listFiles(path + f->d_name + "/", cb);
if (f->d_type == DT_REG)
cb(path + f->d_name);
}
closedir(dir);
}
}
Call the above function from a main or _tmain with the following
listFiles("my_directory/", [](const std::string &path) {
std::cout << path << std::endl;
});
This is c++11 standard.
Hope this helps
RE: Recursively Display Contents In A Directory - Microsoft C++ - gurlhackerclub - Feb 3, 2020
(Feb 2, 2020 08:45 AM)m1n0r1tyrep0rt Wrote: Yeah that is not going to search recursively, because for recursion "you need to call yourself".
#include <string>
#include <functional>
#include <dirent.h>
void listFiles(const std::string &path, std::function<void(const std::string &)> cb) {
if (auto dir = opendir(path.c_str())) {
while (auto f = readdir(dir)) {
if (!f->d_name || f->d_name[0] == '.') continue;
if (f->d_type == DT_DIR)
listFiles(path + f->d_name + "/", cb);
if (f->d_type == DT_REG)
cb(path + f->d_name);
}
closedir(dir);
}
}
Call the above function from a main or _tmain with the following
listFiles("my_directory/", [](const std::string &path) {
std::cout << path << std::endl;
});
This is c++11 standard.
Hope this helps
Thanks. I will look more into dirent.
RE: Recursively Display Contents In A Directory - Microsoft C++ - AnonMouse - Feb 6, 2020
give me a second pal and i will see if i can fix this for you :)
RE: Recursively Display Contents In A Directory - Microsoft C++ - SIM-3991524 - Feb 7, 2020
Pretty sure you want FindFirstFileW and FindNextFileW
code (vs2019 toolset v142)
Spoiler (Click to View)
output
Spoiler (Click to View)
RE: Recursively Display Contents In A Directory - Microsoft C++ - gurlhackerclub - Feb 7, 2020
(Feb 7, 2020 05:41 PM)f411en Wrote: Pretty sure you want FindFirstFileW and FindNextFileW
code (vs2019 toolset v142)
Spoiler (Click to View)
output
Spoiler (Click to View)
This worked great, thanks!
RE: Recursively Display Contents In A Directory - Microsoft C++ - gurlhackerclub - Apr 7, 2020
Just for the record another way to do this
Code
#include <boost/filesystem.hpp>
#include <iostream>
using namespace boost::filesystem;
int main()
{
path p = "C:\\Users\\gurlh\\Desktop";
recursive_directory_iterator it{ p };
while (it != recursive_directory_iterator{})
std::cout << *it++ << '\n';
}RE: Recursively Display Contents In A Directory - Microsoft C++ - gurlhackerclub - May 2, 2020
I'm an idiot.
I finally figured out how to use the filesystem library to search recursively. Switch from my default language of C++ 14 to C++17.
So without Boost, setting my Language to C++ 17. That was a headache.
Code
#include <filesystem>
#include <iostream>
#include <string>
#include <shlobj.h>
#include <KnownFolders.h>
namespace fs = std::filesystem;
int main() {
PWSTR the_path;
SHGetKnownFolderPath(FOLDERID_Desktop, KF_FLAG_DEFAULT, NULL, &the_path);
fs::path current_dir(the_path);
// fs::path current_dir(".");
// list all files containing an mp3 extension
for (auto& file : fs::recursive_directory_iterator(current_dir)) {
if (file.path().extension() == ".txt")
std::cout << file.path().string() << file.path().filename().string() << std::endl;
}
}