[network-manager-openvpn/th/export-bgo764132: 9/27] properties: refactor do_export() (add _arg_is_set())

[Thomas Haller <thaller src gnome org>]

commit 2a6cb6e20885505053b2fa3cf15d15d1b3fa56f3
Author: Thomas Haller <thaller redhat com>
Date:   Wed Mar 23 18:54:56 2016 +0100

    properties: refactor do_export() (add _arg_is_set())

 properties/import-export.c |   54 ++++++++++++++++++++++++-------------------
 1 files changed, 30 insertions(+), 24 deletions(-)
---
diff --git a/properties/import-export.c b/properties/import-export.c
index c344819..173982c 100644
--- a/properties/import-export.c
+++ b/properties/import-export.c
@@ -96,6 +96,12 @@ const char *_nmovpn_test_temp_path = NULL;
 
 /*****************************************************************************/
 
+static const char *
+_arg_is_set (const char *value)
+{
+       return (value && value[0]) ? value : NULL;
+}
+
 static void
 _auto_free_gstring_p (GString **ptr)
 {
@@ -1680,7 +1686,7 @@ do_export_create (NMConnection *connection, const char *path, GError **error)
        }
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                gateways = value;
        else {
                g_set_error_literal (error,
@@ -1691,62 +1697,62 @@ do_export_create (NMConnection *connection, const char *path, GError **error)
        }
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CONNECTION_TYPE);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                connection_type = value;
 
        if (   !strcmp (connection_type, NM_OPENVPN_CONTYPE_TLS)
            || !strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD)
            || !strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD_TLS)) {
                value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CA);
-               if (value && strlen (value))
+               if (_arg_is_set (value))
                        cacert = nmv_utils_str_utf8safe_unescape (value);
        }
 
        if (   !strcmp (connection_type, NM_OPENVPN_CONTYPE_TLS)
            || !strcmp (connection_type, NM_OPENVPN_CONTYPE_PASSWORD_TLS)) {
                value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CERT);
-               if (value && strlen (value))
+               if (_arg_is_set (value))
                        user_cert = nmv_utils_str_utf8safe_unescape (value);
 
                value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_KEY);
-               if (value && strlen (value))
+               if (_arg_is_set (value))
                        private_key = nmv_utils_str_utf8safe_unescape (value);
        }
 
        if (!strcmp (connection_type, NM_OPENVPN_CONTYPE_STATIC_KEY)) {
                value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_STATIC_KEY);
-               if (value && strlen (value))
+               if (_arg_is_set (value))
                        static_key = nmv_utils_str_utf8safe_unescape (value);
 
                value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_STATIC_KEY_DIRECTION);
-               if (value && strlen (value))
+               if (_arg_is_set (value))
                        static_key_direction = value;
        }
 
        /* Export tls-remote value now*/
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TLS_REMOTE);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                tls_remote = value;
 
        /* Advanced values start */
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PORT);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                port = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PING);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                ping = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PING_EXIT);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                ping_exit = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_PING_RESTART);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                ping_restart = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_RENEG_SECONDS);
-       if (value && strlen (value)) {
+       if (_arg_is_set (value)) {
                reneg_exists = TRUE;
                reneg = strtol (value, NULL, 10);
        }
@@ -1756,11 +1762,11 @@ do_export_create (NMConnection *connection, const char *path, GError **error)
                proto_udp = FALSE;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_DEV);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                device = nmv_utils_str_utf8safe_unescape (value);
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_DEV_TYPE);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                device_type = value;
 
        /* Read legacy 'tap-dev' property for backwards compatibility. */
@@ -1777,33 +1783,33 @@ do_export_create (NMConnection *connection, const char *path, GError **error)
                use_float = TRUE;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_CIPHER);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                cipher = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_KEYSIZE);
-       if (value && strlen (value)) {
+       if (_arg_is_set (value)) {
                keysize_exists = TRUE;
                keysize = strtol (value, NULL, 10);
        }
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_LOCAL_IP);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                local_ip = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE_IP);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                remote_ip = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TA);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                tls_auth = nmv_utils_str_utf8safe_unescape (value);
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TA_DIR);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                tls_auth_dir = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE_CERT_TLS);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                remote_cert_tls = value;
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_REMOTE_RANDOM);
@@ -1898,11 +1904,11 @@ do_export_create (NMConnection *connection, const char *path, GError **error)
                args_write_line (f, TAG_MSSFIX);
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_TUNNEL_MTU);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                args_write_line_int64_str (f, TAG_TUN_MTU, value);
 
        value = nm_setting_vpn_get_data_item (s_vpn, NM_OPENVPN_KEY_FRAGMENT_SIZE);
-       if (value && strlen (value))
+       if (_arg_is_set (value))
                args_write_line_int64_str (f, TAG_FRAGMENT, value);
 
        args_write_line (f,