C++ (Cpp) CHECK_NULL_ARG3 Examples

Example #1

File: sysrepocfg.c Project: eqvinox/sysrepo

/**
 * @brief Asks user a question and returns true (non-zero value) if the answer was positive, false otherwise.
 */
static int
srcfg_prompt(const char *question, const char *positive, const char *negative)
{
    char input[PATH_MAX] = { 0, };
    int ret = 0;

    CHECK_NULL_ARG3(question, positive, negative);

    printf("%s [%s/%s]\n", question, positive, negative);

    for (;;) {
        ret = scanf("%" PATH_MAX_STR "s", input);
        if (EOF == ret) {
            SR_LOG_WRN_MSG("Scanf failed: end of the input stream.");
            return 0;
        }
        sr_str_trim(input);
        if (0 == strcasecmp(positive, input)) {
            return 1;
        }
        if (0 == strcasecmp(negative, input)) {
            return 0;
        }
        printf("Please enter [%s] or [%s].\n", positive, negative);
    }
    return 0;
}

Example #2

File: sysrepo-plugind.c Project: qmm161/sysrepo

/**
 * @brief Loads a plugin form provided filename.
 */
static int
sr_pd_load_plugin(sr_session_ctx_t *session, const char *plugin_filename, sr_pd_plugin_ctx_t *plugin_ctx)
{
    int rc = SR_ERR_OK;

    CHECK_NULL_ARG3(session, plugin_filename, plugin_ctx);

    plugin_ctx->filename = strdup(plugin_filename);
    CHECK_NULL_NOMEM_GOTO(plugin_ctx->filename, rc, cleanup);

    /* open the dynamic library with plugin */
    plugin_ctx->dl_handle = dlopen(plugin_filename, RTLD_LAZY);
    if (NULL == plugin_ctx->dl_handle) {
        SR_LOG_WRN("Unable to load the plugin: %s.", dlerror());
        rc = SR_ERR_INIT_FAILED;
        goto cleanup;
    }

    /* get init function pointer */
    *(void **) (&plugin_ctx->init_cb) = dlsym(plugin_ctx->dl_handle, SR_PLUGIN_INIT_FN_NAME);
    if (NULL == plugin_ctx->init_cb) {
        SR_LOG_WRN("Unable to find '%s' function: %s.", SR_PLUGIN_INIT_FN_NAME, dlerror());
        rc = SR_ERR_INIT_FAILED;
        goto cleanup;
    }

    /* get cleanup function pointer */
    *(void **) (&plugin_ctx->cleanup_cb) = dlsym(plugin_ctx->dl_handle, SR_PLUGIN_CLEANUP_FN_NAME);
    if (NULL == plugin_ctx->cleanup_cb) {
        SR_LOG_WRN("Unable to find '%s' function: %s.", SR_PLUGIN_CLEANUP_FN_NAME, dlerror());
        rc = SR_ERR_INIT_FAILED;
        goto cleanup;
    }

    /* get health check function pointer */
    *(void **) (&plugin_ctx->health_check_cb) = dlsym(plugin_ctx->dl_handle, SR_PLUGIN_HEALTH_CHECK_FN_NAME);
    if (NULL != plugin_ctx->health_check_cb) {
        SR_LOG_DBG("'%s' function found, health checks will be applied.", SR_PLUGIN_HEALTH_CHECK_FN_NAME);
    }

    return SR_ERR_OK;

cleanup:
    if (NULL != plugin_ctx->dl_handle) {
        dlclose(plugin_ctx->dl_handle);
    }
    free(plugin_ctx->filename);
    return rc;
}