A lot of updates

src/misc/hex.h

@@ -15,6 +15,19 @@ namespace hex {
 			output[idx++] = static_cast<char>(beg + ((elm & 0x0F) >> 0));
 		}
 
+		return std::string(output, len);
+	}
+	inline std::string hex(const std::string& input){
+		size_t len = input.length() * 2;
+		char output[len];
+		size_t idx = 0;
+		for (char elm : input) {
+			auto lower = ((uint8_t) elm >> 4U) & 0xFU;
+			auto upper = ((uint8_t) elm & 0xFU) >> 0U;
+			output[idx++] = static_cast<char>(lower > 9 ? 'a' + (lower - 9) : '0' + lower);
+			output[idx++] = static_cast<char>(upper > 9 ? 'a' + (upper - 9) : '0' + upper);
+		}
+
 		return std::string(output, len);
 	}
 }