commit 4d64652686897d5e033de6a6bd38218cc69e64d2
Author: Kiritow <1362050620@qq.com>
Date:   Mon Jun 25 11:16:59 2018 +0800

    Initial Commit

diff --git a/FileWrapper.h b/FileWrapper.h
new file mode 100644
index 0000000..bdba309
--- /dev/null
+++ b/FileWrapper.h
@@ -0,0 +1,22 @@
+#pragma once
+#include <string>
+#include <functional>
+
+class DirWalk
+{
+public:
+    DirWalk(const std::string& DirName);
+    ~DirWalk();
+    // noncopyable, nonmovable.
+    DirWalk(const DirWalk&) = delete;
+    DirWalk& operator = (const DirWalk&) = delete;
+    DirWalk(DirWalk&&) = delete;
+    DirWalk& operator = (DirWalk&&) = delete;
+    
+    bool isReady() const;
+    int next(std::string& name, bool& is_dir);
+    std::string getroot() const;
+private:
+    struct _impl;
+    _impl* _p;
+};
diff --git a/FileWrapper_Lin.cpp b/FileWrapper_Lin.cpp
new file mode 100644
index 0000000..8781cec
--- /dev/null
+++ b/FileWrapper_Lin.cpp
@@ -0,0 +1,77 @@
+#ifndef _WIN32
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <cstdlib>
+
+struct DirWalk::_impl
+{
+    DIR* dir;
+    std::string root;
+};
+
+DirWalk::DirWalk(const std::string& DirName)
+{
+    std::string realname = DirName;
+    int sz = realname.size();
+    if (realname[sz-1] != '/')
+    {
+        realname.push_back('/');
+    }
+    if ((_p->dir = opendir(realname .c_str())) != NULL)
+    {
+        _p->root = realname;
+    }
+    else
+    {
+        _status = -1;
+    }
+}
+
+DirWalk::~DirWalk()
+{
+    closedir(_p->dir);
+    delete _p;
+}
+
+bool DirWalk::isReady() const
+{
+    return _p->dir != NULL;
+}
+
+int DirWalk::next(std:; string& name, bool& is_dir)
+{
+    dirent* file = NULL;
+    if ((file = readdir(Dir)) != NULL)
+    {
+        if (file->d_type == DT_DIR)
+        {
+            if (strcmp(file->d_name, ".") != 0 &&
+                strcmp(file->d_name, "..") != 0)
+            {
+                is_dir = true;
+                name = file->d_name;
+                return 1;
+            }
+            else return next(name, is_dir);
+        }
+        else
+        {
+            name = file->d_name;
+            is_dir = false;
+            return 1;
+        }
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+std::string DirWalk::getroot()
+{
+    return _p->root;
+}
+
+#endif // End of ifndef _WIN32
\ No newline at end of file
diff --git a/FileWrapper_Win.cpp b/FileWrapper_Win.cpp
new file mode 100644
index 0000000..6ed7dbe
--- /dev/null
+++ b/FileWrapper_Win.cpp
@@ -0,0 +1,82 @@
+#ifdef _WIN32
+#include "FileWrapper.h"
+#include <Windows.h>
+
+struct DirWalk::_impl
+{
+    HANDLE hand;
+    WIN32_FIND_DATA fnd;
+    std::string root;
+    // -1 Not Opened 0 End 1 Ready
+    int status;
+};
+
+DirWalk::DirWalk(const std::string& DirName) : _p(new _impl)
+{
+    std::string realname = DirName;
+    int sz = realname.size();
+    if (realname[sz - 1] != '\'')
+    {
+        realname.push_back('\\');
+    }
+    _p->root = realname;
+    realname.push_back('*');
+
+    _p->hand = FindFirstFile(realname.c_str(), &_p->fnd);
+    if (_p->hand != INVALID_HANDLE_VALUE)
+    {
+        _p->status = 1;
+    }
+    else
+    {
+        _p->status = -1;
+    }
+}
+
+DirWalk::~DirWalk()
+{
+    if (_p->hand != INVALID_HANDLE_VALUE)
+    {
+        FindClose(_p->hand);
+    }
+    delete _p;
+}
+
+bool DirWalk::isReady() const
+{
+    return _p->status >= 0;
+}
+
+std::string DirWalk::getroot() const
+{
+    return _p->root;
+}
+
+int DirWalk::next(std::string& name, bool& is_dir)
+{
+    if (_p->status == 1)
+    {
+        name = _p->fnd.cFileName;
+        if (_p->fnd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+        {
+            is_dir = true;
+        }
+        else
+        {
+            is_dir = false;
+        }
+
+        // Step down
+        if (!FindNextFile(_p->hand, &_p->fnd))
+        {
+            _p->status = 0;
+        }
+
+        return 1;
+    }
+    else
+    {
+        return 0;
+    }
+}
+#endif // End of _WIN32
\ No newline at end of file