FP lifetime: Setting string from array

[pfultz2]

string Mac2String(uint8_t *mac, char seperator) {
    char tempstr[MAC_STR_LEN];

    // There must be a better way to do this...
    if (seperator != '\0')
        snprintf(tempstr, MAC_STR_LEN, "%02X%c%02X%c%02X%c%02X%c%02X%c%02X",
                 mac[0], seperator, mac[1], seperator, mac[2], seperator,
                 mac[3], seperator, mac[4], seperator, mac[5]);
    else
        snprintf(tempstr, MAC_STR_LEN, "%02X%02X%02X%02X%02X%02X",
                 mac[0], mac[1], mac[2],
                 mac[3], mac[4], mac[5]);

    string temp = tempstr;
    return temp;
}