utils: convert hex <-> bytes

src/utils/misc.cc

@@ -0,0 +1,32 @@
+#include <format>
+#include <sstream>
+#include <string>
+
+#include "misc.h"
+
+namespace mtrx {
+namespace utils {
+
+std::string hexFromBytes(const uint8_t * bytes, const uint32_t size) {
+	std::ostringstream oss;
+	for (uint32_t i = 0; i < size; i++)
+		oss << std::format("{:02x}", bytes[i]);
+	return oss.str();
+}
+
+bool hexToBytes(const std::string & hex, uint8_t * bytes, const uint32_t size) {
+	if (hex.size() != size * 2)
+		return false;
+
+	for (auto c : hex)
+		if (!std::isxdigit(c))
+			return false;
+
+	for (uint32_t i = 0; i < size; i++)
+		bytes[i] = std::stoul(hex.substr(i * 2, 2), nullptr, 16);
+
+	return true;
+}
+
+}; // namespace utils
+}; // namespace mtrx

src/utils/misc.h

@@ -0,0 +1,16 @@
+#ifndef INCLUDE_UTILS_MISC_H
+#define INCLUDE_UTILS_MISC_H
+
+#include <cstdint>
+#include <string>
+
+namespace mtrx {
+namespace utils {
+
+std::string hexFromBytes(const uint8_t * bytes, const uint32_t size);
+bool        hexToBytes(const std::string & hex, uint8_t * bytes, const uint32_t size);
+
+}; // namespace utils
+}; // namespace mtrx
+
+#endif