BAN: Error can now be constructed from c_string or format string

If the resulting string would overflow, we just truncate it to fit
the error message buffer (128) bytes

BAN/include/BAN/Errors.h

@@ -21,20 +21,32 @@ namespace BAN
 	class Error
 	{
 	public:
-		static Error from_string(const char* message)
+		static Error from_c_string(const char* message)
 		{
-			static_assert(sizeof(message) < 128);
 			Error result;
-			strncpy(result.m_message, message, sizeof(m_message));
-			result.m_message[sizeof(result.m_message) - 1] = '\0';
+			strncpy(result.m_message, message, sizeof(Error::m_message));
+			result.m_message[sizeof(Error::m_message) - 1] = '\0';
 			result.m_error_code = 0xFF;
 			return result;
 		}
+		template<typename... Args>
+		static Error from_format(const char* format, Args&&... args)
+		{
+			char buffer[sizeof(Error::m_message)] {};
+			size_t index = 0;
+			auto putc = [&](char ch)
+			{
+				if (index < sizeof(buffer) - 1)
+					buffer[index++] = ch;
+			};
+			Formatter::print(putc, format, forward<Args>(args)...);
+			return from_c_string(buffer);
+		}
 		static Error from_errno(int error)
 		{
 			Error result;
-			strncpy(result.m_message, strerror(error), sizeof(m_message));
-			result.m_message[sizeof(result.m_message) - 1] = '\0';
+			strncpy(result.m_message, strerror(error), sizeof(Error::m_message));
+			result.m_message[sizeof(Error::m_message) - 1] = '\0';
 			result.m_error_code = error;
 			return result;
 		}