Function parse_options

ds4_agent.c:512–679

    if (s[0] == '\0' || *end != '\0' || v == 0) {
        fprintf(stderr, "ds4-agent: invalid value for %s: %s\n", opt, s);
        exit(2);
    }
    return (uint64_t)v;
}

static float parse_float_range(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-agent: invalid value for %s: %s\n", opt, s);
        exit(2);
    }
    return v;
}

static ds4_backend parse_backend(const char *s) {
    if (!strcmp(s, "metal")) return DS4_BACKEND_METAL;
    if (!strcmp(s, "cuda")) return DS4_BACKEND_CUDA;
    if (!strcmp(s, "cpu")) return DS4_BACKEND_CPU;
    fprintf(stderr, "ds4-agent: invalid backend: %s\n", s);
    exit(2);
}

static ds4_backend default_backend(void) {
#ifdef DS4_NO_GPU
    return DS4_BACKEND_CPU;
#elif defined(__APPLE__)
    return DS4_BACKEND_METAL;
#else
    return DS4_BACKEND_CUDA;
#endif
}

static double now_sec(void) {
    struct timespec ts;
    clock_gettime(CLOCK_MONOTONIC, &ts);
    return (double)ts.tv_sec + (double)ts.tv_nsec * 1.0e-9;
}

static void usage(FILE *fp, const char *topic) {
    ds4_help_print(fp, DS4_HELP_AGENT, topic);
}

static const char *need_arg(int *i, int argc, char **argv, const char *opt) {
    if (*i + 1 >= argc) {
        fprintf(stderr, "ds4-agent: missing value for %s\n", opt);
        exit(2);
    }
    return argv[++(*i)];
}

static agent_config parse_options(int argc, char **argv) {
    agent_config c = {
        .engine = {
            .model_path = "ds4flash.gguf",
            .backend = default_backend(),
            .mtp_draft_tokens = 1,
            .mtp_margin = 3.0f,