1 files changed, 94 insertions, 0 deletions
diff --git a/Src/WAT/wa_files.cpp b/Src/WAT/wa_files.cpp
new file mode 100644
index 00000000..84e0a1fa
--- /dev/null
+++ b/Src/WAT/wa_files.cpp
@@ -0,0 +1,94 @@
+#include "WAT.h"
+
+bool wa::files::file_exists( const char *p_filename )
+{
+	if ( p_filename == NULL )
+		return false;
+
+
+	struct stat l_buffer;
+	return ( stat( p_filename, &l_buffer ) == 0 );
+}
+
+bool wa::files::file_exists( const std::string &p_filename )
+{
+	return wa::files::file_exists( p_filename.c_str() );
+}
+
+bool wa::files::file_exists( const wchar_t *p_filename )
+{
+	return wa::files::file_exists( wa::strings::convert::to_string( p_filename ) );
+}
+
+
+int wa::files::file_size( const char *p_filename )
+{
+    int l_file_size = -1;
+
+    struct stat l_file_info{};
+
+
+    if ( !stat( p_filename, &l_file_info ) )
+        l_file_size = l_file_info.st_size;
+
+
+    return l_file_size;
+}
+
+int wa::files::file_size( const wchar_t *p_filename )
+{
+    std::string l_filename = wa::strings::convert::to_string( p_filename );
+
+    return file_size( l_filename.c_str() );
+}
+
+
+bool wa::files::folder_exists( const char *p_folder )
+{
+    struct stat info;
+
+    if ( stat( p_folder, &info) != 0 )
+        return false;
+    else if ( info.st_mode & S_IFDIR )
+        return true;
+    else
+        return false;
+}
+
+
+bool wa::files::getFilenamesFromFolder( std::vector<std::string> &p_result, const std::string &p_folder_path, const std::string &p_reg_ex, const size_t p_limit )
+{
+	_finddata_t l_file_info;
+	std::string l_file_pattern = p_folder_path + "\\" + p_reg_ex;
+
+    intptr_t l_handle = _findfirst( l_file_pattern.c_str(), &l_file_info );
+    //If folder_path exsist, using l_file_pattern will find at least two files "." and "..", 
+    //of which "." means current dir and ".." means parent dir
+    if ( l_handle != -1 )
+    {
+        //iteratively check each file or sub_directory in current folder
+        do
+        {
+            std::string l_file_name = l_file_info.name; //from char array to string
+            //check whtether it is a sub direcotry or a file
+            if ( l_file_info.attrib & _A_SUBDIR )
+            {
+                if ( l_file_name != "." && l_file_name != ".." )
+                    wa::files::getFilenamesFromFolder( p_result, p_folder_path + "\\" + l_file_name, p_reg_ex );
+            }
+            else
+                p_result.push_back( p_folder_path + "\\" + l_file_name );
+                
+        } while ( _findnext( l_handle, &l_file_info ) == 0 && p_result.size() < p_limit - 1 );
+
+
+        _findclose( l_handle );
+
+        return true;
+    }
+
+    //
+    _findclose( l_handle );
+
+	return false;
+}