finish linux related code writting. remove all offensive content.

- REMOVE all offensive content in README and etc. This project respect to every contributors.
- However, for commercial reason, we limit the contribution from Dassault.
- Change license.
- Finish linux platform code.

Unvirt/StringHelper.cpp

@@ -1,24 +1,30 @@
 #include "StringHelper.hpp"
 #include <stdexcept>
 
-namespace Unvirt {
-	namespace StringHelper {
-
-		void StdstringPrintf(std::string& strl, const char* format, ...) {
-			va_list argptr;
-			va_start(argptr, format);
-			StdstringVPrintf(strl, format, argptr);
-			va_end(argptr);
-		}
-
-		void StdstringVPrintf(std::string& strl, const char* format, va_list argptr) {
-			int count = _vsnprintf(NULL, 0, format, argptr);
-
-			strl.resize(count);
-			int write_result = _vsnprintf(strl.data(), count, format, argptr);
-
-			if (write_result < 0 || write_result > count) throw new std::length_error("Invalid write_result in _vsnprintf.");
-		}
+namespace Unvirt::StringHelper {
 
+	void StdstringPrintf(std::string& strl, const char* format, ...) {
+		va_list argptr;
+		va_start(argptr, format);
+		StdstringVPrintf(strl, format, argptr);
+		va_end(argptr);
 	}
+
+	void StdstringVPrintf(std::string& strl, const char* format, va_list argptr) {
+		va_list args1;
+		va_copy(args1, argptr);
+		va_list args2;
+		va_copy(args2, argptr);
+
+		int count = std::vsnprintf(nullptr, 0, format, args1);
+		if (count < 0) throw new std::length_error("Invalid length returned by vsnprintf.");
+		va_end(args1);
+
+		strl.resize(count + 1);
+		int write_result = std::vsnprintf(strl.data(), strl.size(), format, args2);
+		va_end(args2);
+		
+		if (write_result < 0 || write_result > count) throw new std::length_error("Invalid write result in vsnprintf.");
+	}
+
 }

Unvirt/StringHelper.hpp

@@ -3,11 +3,9 @@
 #include <string>
 #include <cstdarg>
 
-namespace Unvirt {
-	namespace StringHelper {
+namespace Unvirt::StringHelper {
 
-		void StdstringPrintf(std::string& strl, const char* format, ...);
-		void StdstringVPrintf(std::string& strl, const char* format, va_list argptr);
+	void StdstringPrintf(std::string& strl, const char* format, ...);
+	void StdstringVPrintf(std::string& strl, const char* format, va_list argptr);
 
-	}
 }