Function char2int

eval/CIPO_evaluation/common/gason.cpp:89–93

}

static inline int char2int(char c) {
    if (c <= '9')
        return c - '0';
    return (c & ~' ') - 'A' + 10;
}

static double string2double(char *s, char **endptr) {
    char ch = *s;