Function countAPI

javascript/lib.c:263–313

}

napi_value countAPI(napi_env env, napi_callback_info info) {
    size_t argc = 3;
    napi_value args[3];
    napi_get_cb_info(env, info, &argc, args, NULL, NULL);

    void *haystack_data, *needle_data;
    size_t haystack_length, needle_length;
    napi_status status = napi_get_buffer_info(env, args[0], &haystack_data, &haystack_length);
    if (status != napi_ok) {
        napi_throw_error(env, NULL, "First argument must be a Buffer");
        return NULL;
    }
    status = napi_get_buffer_info(env, args[1], &needle_data, &needle_length);
    if (status != napi_ok) {
        napi_throw_error(env, NULL, "Second argument must be a Buffer");
        return NULL;
    }

    bool overlap = false;
    if (argc > 2) { napi_get_value_bool(env, args[2], &overlap); }

    sz_string_view_t haystack = {(sz_cptr_t)haystack_data, haystack_length};
    sz_string_view_t needle = {(sz_cptr_t)needle_data, needle_length};

    size_t count = 0;
    if (needle.length == 0 || haystack.length == 0 || haystack.length < needle.length) { count = 0; }
    else if (overlap) {
        while (haystack.length) {
            sz_cptr_t ptr = sz_find(haystack.start, haystack.length, needle.start, needle.length);
            sz_bool_t found = ptr != NULL;
            sz_size_t offset = found ? (sz_size_t)(ptr - haystack.start) : haystack.length;
            count += found;
            haystack.start += offset + found;
            haystack.length -= offset + found;
        }
    }
    else {
        while (haystack.length) {
            sz_cptr_t ptr = sz_find(haystack.start, haystack.length, needle.start, needle.length);
            sz_bool_t found = ptr != NULL;
            sz_size_t offset = found ? (sz_size_t)(ptr - haystack.start) : haystack.length;
            count += found;
            haystack.start += offset + needle.length;
            haystack.length -= offset + needle.length * found;
        }
    }

    napi_value js_count;
    napi_create_bigint_uint64(env, count, &js_count);
    return js_count;
}

napi_value hashAPI(napi_env env, napi_callback_info info) {
    size_t argc = 2;