shared: embed scheme_type in NMSetting8021xSchemeVtable

Since we can easily lookup the vtable for a NMSetting8021xSchemeType,
it is convenient to also easily get the scheme_type for a given
NMSetting8021xSchemeVtable.

On my x86_64, this change is basically for free as it does not increase
the size of NMSetting8021xSchemeVtable, because the scheme_type fits in a
previously unused part of the NMSetting8021xSchemeVtable struct.

shared/nm-meta-setting.c

@@ -73,7 +73,16 @@
 /*****************************************************************************/
 
 const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
-	[NM_SETTING_802_1X_SCHEME_TYPE_CA_CERT] = {
+
+#define _D(_scheme_type, ...) \
+	[(_scheme_type)] = { \
+		.scheme_type = (_scheme_type), \
+		__VA_ARGS__ \
+	}
+
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_UNKNOWN),
+
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_CA_CERT,
 		.setting_key          = NM_SETTING_802_1X_CA_CERT,
 		.scheme_func          = nm_setting_802_1x_get_ca_cert_scheme,
 		.format_func          = NULL,
@@ -84,9 +93,9 @@ const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
 		.pwflag_func          = nm_setting_802_1x_get_ca_cert_password_flags,
 		.set_cert_func        = nm_setting_802_1x_set_ca_cert,
 		.file_suffix          = "ca-cert",
-	},
+	),
 
-	[NM_SETTING_802_1X_SCHEME_TYPE_PHASE2_CA_CERT] = {
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_PHASE2_CA_CERT,
 		.setting_key          = NM_SETTING_802_1X_PHASE2_CA_CERT,
 		.scheme_func          = nm_setting_802_1x_get_phase2_ca_cert_scheme,
 		.format_func          = NULL,
@@ -97,9 +106,9 @@ const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
 		.pwflag_func          = nm_setting_802_1x_get_phase2_ca_cert_password_flags,
 		.set_cert_func        = nm_setting_802_1x_set_phase2_ca_cert,
 		.file_suffix          = "inner-ca-cert",
-	},
+	),
 
-	[NM_SETTING_802_1X_SCHEME_TYPE_CLIENT_CERT] = {
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_CLIENT_CERT,
 		.setting_key          = NM_SETTING_802_1X_CLIENT_CERT,
 		.scheme_func          = nm_setting_802_1x_get_client_cert_scheme,
 		.format_func          = NULL,
@@ -110,9 +119,9 @@ const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
 		.pwflag_func          = nm_setting_802_1x_get_client_cert_password_flags,
 		.set_cert_func        = nm_setting_802_1x_set_client_cert,
 		.file_suffix          = "client-cert",
-	},
+	),
 
-	[NM_SETTING_802_1X_SCHEME_TYPE_PHASE2_CLIENT_CERT] = {
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_PHASE2_CLIENT_CERT,
 		.setting_key          = NM_SETTING_802_1X_PHASE2_CLIENT_CERT,
 		.scheme_func          = nm_setting_802_1x_get_phase2_client_cert_scheme,
 		.format_func          = NULL,
@@ -123,9 +132,9 @@ const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
 		.pwflag_func          = nm_setting_802_1x_get_phase2_client_cert_password_flags,
 		.set_cert_func        = nm_setting_802_1x_set_phase2_client_cert,
 		.file_suffix          = "inner-client-cert",
-	},
+	),
 
-	[NM_SETTING_802_1X_SCHEME_TYPE_PRIVATE_KEY] = {
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_PRIVATE_KEY,
 		.setting_key          = NM_SETTING_802_1X_PRIVATE_KEY,
 		.scheme_func          = nm_setting_802_1x_get_private_key_scheme,
 		.format_func          = nm_setting_802_1x_get_private_key_format,
@@ -137,9 +146,9 @@ const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
 		.set_private_key_func = nm_setting_802_1x_set_private_key,
 		.file_suffix          = "private-key",
 		.is_secret            = TRUE,
-	},
+	),
 
-	[NM_SETTING_802_1X_SCHEME_TYPE_PHASE2_PRIVATE_KEY] = {
+	_D (NM_SETTING_802_1X_SCHEME_TYPE_PHASE2_PRIVATE_KEY,
 		.setting_key          = NM_SETTING_802_1X_PHASE2_PRIVATE_KEY,
 		.scheme_func          = nm_setting_802_1x_get_phase2_private_key_scheme,
 		.format_func          = nm_setting_802_1x_get_phase2_private_key_format,
@@ -151,9 +160,9 @@ const NMSetting8021xSchemeVtable nm_setting_8021x_scheme_vtable[] = {
 		.set_private_key_func = nm_setting_802_1x_set_phase2_private_key,
 		.file_suffix          = "inner-private-key",
 		.is_secret            = TRUE,
-	},
+	),
 
-	[NM_SETTING_802_1X_SCHEME_TYPE_UNKNOWN] = { NULL },
+#undef _D
 };
 
 /*****************************************************************************/

shared/nm-meta-setting.h

@@ -101,6 +101,7 @@ typedef struct {
 	                                  NMSetting8021xCKFormat *out_format,
 	                                  GError **error);
 	const char *file_suffix;
+	NMSetting8021xSchemeType scheme_type;
 	bool is_secret:1;
 } NMSetting8021xSchemeVtable;