move load/unload stuff to private functions

* PKG_ADD, PKG_DEL: remove script body and call provate function

* private/sqlite_pkg_add.m, private/sqlite_pkg_del.m: new file

inst/PKG_ADD

@@ -1,14 +1,3 @@
-# on package load, attempt to load docs
-try
-  pkg_dir = fileparts (fullfile (mfilename ("fullpath")));
-  doc_file = fullfile (pkg_dir, "doc", "octave-aqlite.qch");
-  if exist(doc_file, "file")
-    if exist("__event_manager_register_documentation__")
-      __event_manager_register_documentation__ (doc_file);
-    elseif exist("__event_manager_register_doc__")
-      __event_manager_register_doc__ (doc_file);
-    endif
-  endif
-catch
-  # do nothing
-end_try_catch
+# on package load, call private add
+
+sqlite_pkg_add();

inst/PKG_DEL

@@ -1,14 +1,2 @@
-# on package unload, attempt to unload docs
-try
-  pkg_dir = fileparts (fullfile (mfilename ("fullpath")));
-  doc_file = fullfile (pkg_dir, "doc", "octave-sqlite.qch");
-  if exist(doc_file, "file")
-    if exist("__event_manager_unregister_documentation__")
-      __event_manager_unregister_documentation__ (doc_file);
-    elseif exist("__event_manager_unregister_doc__")
-      __event_manager_unregister_doc__ (doc_file);
-    endif
-  endif
-catch
-  # do nothing
-end_try_catch
+# on unload, call private del
+sqlite_pkg_del ();

inst/private/sqlite_pkg_add.m

@@ -0,0 +1,42 @@
+## Copyright (C) 2022 John Donoghue <john.donoghue@ieee.org>
+##
+## This program is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see
+## <https://www.gnu.org/licenses/>.
+
+## -*- texinfo -*- 
+## @deftypefn {} {} sqlite_pkg_add()
+## private function
+## @end deftypefn
+function sqlite_pkg_add ()
+  # on package load, attempt to load docs
+  try
+    pkg_dir = fileparts (fullfile (mfilename ("fullpath")));
+    doc_file = fullfile (pkg_dir, "..", "doc", "octave-aqlite.qch");
+    if exist(doc_file, "file")
+      if exist("__event_manager_register_documentation__")
+        __event_manager_register_documentation__ (doc_file);
+      elseif exist("__event_manager_register_doc__")
+        __event_manager_register_doc__ (doc_file);
+      endif
+    endif
+  catch
+    # do nothing
+  end_try_catch
+
+  # if table type exists, use it, otherwise use dbtable
+  if exist ("table") == 0
+    assignin("base", "table", @dbtable);
+  endif
+
+endfunction

inst/private/sqlite_pkg_del.m

@@ -0,0 +1,45 @@
+## Copyright (C) 2022 John Donoghue <john.donoghue@ieee.org>
+##
+## This program is free software: you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see
+## <https://www.gnu.org/licenses/>.
+
+## -*- texinfo -*- 
+## @deftypefn {} {} sqlite_pkg_del()
+## private function
+## @end deftypefn
+function sqlite_pkg_del ()
+
+  # on package unload, attempt to unload docs
+  try
+    pkg_dir = fileparts (fullfile (mfilename ("fullpath")));
+    doc_file = fullfile (pkg_dir, "..", "doc", "octave-sqlite.qch");
+    if exist(doc_file, "file")
+      if exist("__event_manager_unregister_documentation__")
+        __event_manager_unregister_documentation__ (doc_file);
+      elseif exist("__event_manager_unregister_doc__")
+        __event_manager_unregister_doc__ (doc_file);
+      endif
+    endif
+  catch
+    # do nothing
+  end_try_catch
+
+  try
+    if exist ("table") == 1 && (table == @dbtable)
+      evalin("base", "clear table");
+    endif
+  catch
+    # do nothing
+  end_try_catch
+endfunction