Function need_arg

ds4_eval.c:1463–1469

    }
    return (uint64_t)v;
}

static float parse_float_arg(const char *s, const char *opt, float min, float max) {
    char *end = NULL;
    float v = strtof(s, &end);
    if (s[0] == '\0' || *end != '\0' || !isfinite(v) || v < min || v > max) {
        fprintf(stderr, "ds4-eval: invalid value for %s: %s\n", opt, s);
        exit(2);
    }
    return v;