Continue reforming procedure execution. In this phase, get rid of

[pspp-builds.git] / src / ChangeLog

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+Wed May  3 22:24:34 2006  Ben Pfaff  <blp@gnu.org>
+
+       Continue reforming procedure execution.  In this phase, get rid of
+       many global variables, consolidating procedure execution in
+       procedure.c.  Encapsulate transformations in new "struct
+       trns_chain".  Also, change implementation of N OF CASES, FILTER,
+       and PROCESS IF from special cases to transformations.
+        
+       * procedure.c: (global var vfm_source) Make static.  Changed
+       external references to use in_input_program(), proc_set_source(),
+       or proc_capture_output() instead.
+       (global var vfm_sink) Make static.  Changed external references to
+       use proc_set_sink() instead.
+       (global var default_dict) Move here from data/dictionary.c.
+       (static var permanent_trns_chain) New var.
+       (static var temp_dict) Renamed permanent_dict, updated references.
+       (static var temporary_trns_chain) New var.
+       (static var cur_trns_chain) New var.
+       (static var in_procedure) Removed.
+       (global var t_trns) Removed.
+       (global var n_trns) Removed.
+       (global var m_trns) Removed.
+       (global var f_trns) Removed.
+       (procedure) Even if there's "nothing to do" we need to clear
+       PROCESS IF, N OF CASES, vector state.  (This should be
+       abstracted.)
+       (multipass_callback) New function.
+       (multipass_procedure) New function.
+       (open_active_file) Add N OF CASES, FILTER, PROCESS IF
+       transformations.  Finalize transformations.  No need to call
+       ctl_stack_clear() anymore because finalizers will do that.
+       (write_case) Simplify and rewrite.
+       (execute_transformations) Removed.
+       (filter_case) Removed.
+       (close_active_file) Use proc_cancel_temporary_transformations().
+       No need to clear PROCESS IF, N OF CASES here anymore because
+       helpers do that.
+       (multipass_procedure_with_splits) Keep track of success.
+       (multipass_split_callback) Ditto.
+       (multipass_split_output) Ditto.
+       (discard_variables) No need to call ctl_stack_clear() anymore
+       because finalizers will do that.
+       (proc_capture_transformations) New function.
+       (add_transformation) Rewrite in terms of trns_chain_append().
+       (add_transformation_with_finalizer) New function.
+       (next_transformation) Rewrite in terms of trns_chain_next().
+       (proc_in_temporary_transformations) New function.
+       (proc_start_temporary_transformations) New function.
+       (proc_make_temporary_transformations_permanent) New function.
+       (proc_cancel_temporary_transformations) New function.
+       (cancel_transformations) Rename proc_cancel_all_transformations(),
+       rewrite in terms of trns_chain_destroy().
+       (proc_init) New function.
+       (proc_done) New function.
+       (proc_set_sink) New function.
+       (proc_set_source) New function.
+       (proc_has_source) New function.
+       (proc_capture_output) New function.
+       (add_case_limit_trns) New function.
+       (case_limit_trns_proc) New function.
+       (case_limit_trns_free) New function.
+       (add_filter_trns) New function.
+       (filter_trns_proc) New function.
+       (add_process_if_trns) New function.
+       (process_if_trns_proc) New function.
+       (process_if_trns_free) New function.
+
 Wed Apr 26 20:00:00 2006  Ben Pfaff  <blp@gnu.org>
 
        * procedure.c (create_trns_case): Fix inverted decision on whether