-static string bytes2hex(uint8_t *bytes, size_t length) {
- char space[129];
- if (length * 2 > sizeof(space) - 1) length = (sizeof(space) - 1) / 2;
- for (size_t i = 0; i < length; i++)
- snprintf(&space[i*2], 3, "%02x", bytes[i]);
- return string(space);
+static std::string bytes2hex(uint8_t *bytes, size_t length) {
+ char buf[3];
+ std::string space;
+
+ space.reserve(length*2 + 1);
+ for (size_t i = 0; i < length; i++) {
+ snprintf(buf, sizeof(buf), "%02x", bytes[i]);
+ space.append(buf);
+ }
+ return space;