@ -17,8 +17,8 @@ std::vector<std::string> split(const std::string& s, char delimiter)
return tokens;
}
char hex_char_to_int( char c ) {
char hex_char_to_int(const char &c) {
unsigned result = -1;
unsigned char result = 0;
if( ('0' <= c) && (c <= '9') ) {
result = c - '0';