ssb: Consolidate global settings helpers.

src/ssb.db.h

@@ -455,6 +455,34 @@ bool tf_ssb_db_verify(tf_ssb_t* ssb, const char* id);
 */
 bool tf_ssb_db_user_has_permission(tf_ssb_t* ssb, sqlite3* db, const char* id, const char* permission);
 
+/**
+** Get a boolean global setting value.
+** @param db The database.
+** @param name The setting name.
+** @param out_value Populated with the value.
+** @return true if the setting was found.
+*/
+bool tf_ssb_db_get_global_setting_bool(sqlite3* db, const char* name, bool* out_value);
+
+/**
+** Get an int64_t global setting value.
+** @param db The database.
+** @param name The setting name.
+** @param out_value Populated with the value.
+** @return true if the setting was found.
+*/
+bool tf_ssb_db_get_global_setting_int64(sqlite3* db, const char* name, int64_t* out_value);
+
+/**
+** Get a string global setting value.
+** @param db The database.
+** @param name The setting name.
+** @param out_value Populated with the value.
+** @param size The size of the out_value buffer.
+** @return true if the setting was found.
+*/
+bool tf_ssb_db_get_global_setting_string(sqlite3* db, const char* name, char* out_value, size_t size);
+
 /**
 ** An SQLite authorizer callback.  See https://www.sqlite.org/c3ref/set_authorizer.html for use.
 ** @param user_data User data registered with the authorizer.