diff --git a/etk/os/FSNode.h b/etk/os/FSNode.h
index 9b5120b..ddb77f2 100644
--- a/etk/os/FSNode.h
+++ b/etk/os/FSNode.h
@@ -480,12 +480,27 @@ namespace etk {
 				fileRead(&value[0], sizeof(T), fileSize()/sizeof(T));
 				return value;
 			}
+			std::string fileReadAllString() {
+				std::string value;
+				value.resize(fileSize());
+				fileRead(&value[0], sizeof(char), fileSize()/sizeof(char));
+				return value;
+			}
+			std::u32string fileReadAllU32String() {
+				return utf8::convertUnicode(fileReadAllString());
+			}
 			/**
 			 * @brief Write all the vector in a file
 			 */
 			template<typename T> void fileWriteAll(const std::vector<T>& _value) {
 				fileWrite(static_cast<const void*>(&(_value[0])), sizeof(T), _value.size()/sizeof(T));
 			}
+			void fileWriteAll(const std::string& _value) {
+				fileWrite(static_cast<const void*>(&(_value[0])), sizeof(char), _value.size()/sizeof(char));
+			}
+			void fileWriteAll(const std::u32string& _value) {
+				fileWriteAll(u32char::convertToUtf8(_value));
+			}
 		private:
 			/**
 			 * @brief Order the list of subnode the folder first and the alphabetical order
diff --git a/etk/stdTools.cpp b/etk/stdTools.cpp
index 9f5134c..b78a5a6 100644
--- a/etk/stdTools.cpp
+++ b/etk/stdTools.cpp
@@ -131,6 +131,11 @@ int8_t u32char::convertUtf8(char32_t _val, char _output[5]) {
 	}
 }
 
+std::string u32char::convertToUtf8(const std::u32string& _input) {
+	TK_TODO("implement this function ...");
+	return "TODO ... std::string u32char::convertToUtf8(const std::u32string& _input)";
+}
+
 
 #undef __class__
 #define __class__ "utf8"
@@ -227,6 +232,11 @@ bool utf8::theoricFirst(const char _input) {
 	return false;
 }
 
+std::u32string utf8::convertUnicode(const std::string& _input) {
+	TK_TODO("implement this function ...");
+	return U"TODO ... std::u32string utf8::convertUnicode(const std::string& _input)";
+}
+
 
 #undef __class__
 #define __class__ "etk"
diff --git a/etk/stdTools.h b/etk/stdTools.h
index 603d505..684c1bf 100644
--- a/etk/stdTools.h
+++ b/etk/stdTools.h
@@ -41,6 +41,7 @@ namespace u32char {
 	
 	char32_t changeOrder(char32_t _val);
 	int8_t convertUtf8(char32_t _val, char _output[5]);
+	std::string convertToUtf8(const std::u32string& _input);
 };
 
 namespace utf8 {
@@ -58,6 +59,7 @@ namespace utf8 {
 	bool theoricFirst(const char _input);
 	
 	char32_t convertChar32(const char* _input);
+	std::u32string convertUnicode(const std::string& _input);
 };
 
 namespace std {
diff --git a/test/main.cpp b/test/main.cpp
index d7721cb..a5a2331 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -16,6 +16,8 @@
 #include <etk/log.h>
 #include <etk/Color.h>
 #include <etk/RegExp.h>
+#include <string>
+#include <regex>
 
 #undef __class__
 #define __class__	"etktest"
@@ -249,7 +251,7 @@ void testRegExp() {
 	//testRegExpSingle("'((\\\\[\\\\'])|.)*'", data);
 	
 	
-	
+	/*
 	data = "ddfgdfgh";
 	etk::RegExp<std::string> reg(".*");
 	reg.setMaximize(true);
@@ -287,6 +289,63 @@ void testRegExp() {
 		TK_INFO("    match [" << reg.start() << ".." << reg.stop() << "] ");
 		TK_INFO("        ==> '" << std::string(data, reg.start(), reg.stop()-reg.start()) << "'");
 	}
+	*/
+	/*
+	std::tr1::cmatch res;
+	str = "<h2>Egg prices</h2>";
+	std::tr1::regex rx("<h(.)>([^<]+)");
+	std::tr1::regex_search(str.c_str(), res, rx);
+	std::cout << res[1] << ". " << res[2] << "\n";
+	*/
+	{
+		std::string lines[] = {"Roses are #ff0000",
+		                       "violets are #0000ff",
+		                       "all of my base are belong to you"};
+		
+		std::regex myRegex("#([a-f0-9]{6})");
+		/*
+		for (const auto &line : lines) {
+			std::cout << line << ": " << std::regex_search(line, color_regex) << '\n';
+		}
+		*/
+		
+		std::smatch resultMatch;
+		for (const auto &line : lines) {
+			TK_DEBUG("in line : '" << line << "'");
+			std::regex_search(line, resultMatch, myRegex);
+			TK_DEBUG("    Find " << resultMatch.size() << " elements");
+			for (size_t iii=0; iii<resultMatch.size(); ++iii) {
+				int32_t posStart = std::distance(line.begin(), resultMatch[iii].first);
+				int32_t posStop = std::distance(line.begin(), resultMatch[iii].second);
+				TK_DEBUG("          [" << iii << "] " << *resultMatch[iii].first);
+				TK_DEBUG("          [" << iii << "] " << *resultMatch[iii].second);
+				TK_DEBUG("          [" << iii << "] " << std::string(line, posStart, posStop-posStart));
+				/*
+				std::ssub_match sub_match = color_match[i];
+				std::string sub_match_str = sub_match.str();
+				*/
+			}
+		}
+	}
+	
+	{
+		const std::string myData = "void limit(const vec2& _origin, const vec2& _size);\n plop(sf)";
+		std::regex myRegex("\\b(\\w|_)+[ \\t]*\\(");
+		
+		std::smatch resultMatch;
+		TK_DEBUG("in line : '" << myData << "'");
+		std::regex_search(myData, resultMatch, myRegex);
+		TK_DEBUG("    Find " << resultMatch.size() << " elements");
+		for (size_t iii=0; iii<resultMatch.size(); ++iii) {
+			int32_t posStart = std::distance(myData.begin(), resultMatch[iii].first);
+			int32_t posStop = std::distance(myData.begin(), resultMatch[iii].second);
+			TK_DEBUG("          [" << iii << "] " << *resultMatch[iii].first);
+			TK_DEBUG("          [" << iii << "] " << *resultMatch[iii].second);
+			TK_DEBUG("          [" << iii << "] " << std::string(myData, posStart, posStop-posStart));
+			
+		}
+		
+	}
 }
 
 int main(int argc, const char *argv[]) {