#include <time.h>
#include <stdbool.h>
+
#include <data/transformations.h>
+#include <libpspp/compiler.h>
struct ccase;
struct casefile;
struct case_sink;
struct case_source;
-/* Dictionary produced by permanent and temporary transformations
- on data from the source. */
-extern struct dictionary *default_dict;
+struct dataset;
+
\f
/* Transformations. */
-void add_transformation (trns_proc_func *, trns_free_func *, void *);
-void add_transformation_with_finalizer (trns_finalize_func *,
+void add_transformation (struct dataset *ds,
+ trns_proc_func *, trns_free_func *, void *);
+void add_transformation_with_finalizer (struct dataset *ds,
+ trns_finalize_func *,
trns_proc_func *,
trns_free_func *, void *);
-size_t next_transformation (void);
+size_t next_transformation (const struct dataset *ds);
+
+void discard_variables (struct dataset *ds);
-void discard_variables (void);
-bool proc_cancel_all_transformations (void);
-struct trns_chain *proc_capture_transformations (void);
-void proc_start_temporary_transformations (void);
-bool proc_in_temporary_transformations (void);
-bool proc_make_temporary_transformations_permanent (void);
-bool proc_cancel_temporary_transformations (void);
+bool proc_cancel_all_transformations (struct dataset *ds);
+struct trns_chain *proc_capture_transformations (struct dataset *ds);
+
+void proc_start_temporary_transformations (struct dataset *ds);
+bool proc_in_temporary_transformations (const struct dataset *ds);
+bool proc_make_temporary_transformations_permanent (struct dataset *ds);
+bool proc_cancel_temporary_transformations (struct dataset *ds);
\f
/* Procedures. */
-void proc_init (void);
-void proc_done (void);
-
-void proc_set_source (struct case_source *);
-bool proc_has_source (void);
-
-void proc_set_sink (struct case_sink *);
-struct casefile *proc_capture_output (void);
-
-bool procedure (bool (*proc_func) (struct ccase *, void *aux), void *aux);
-bool procedure_with_splits (void (*begin_func) (void *aux),
- bool (*proc_func) (struct ccase *, void *aux),
- void (*end_func) (void *aux),
- void *aux);
-bool multipass_procedure (bool (*proc_func) (const struct casefile *,
- void *aux),
- void *aux);
-bool multipass_procedure_with_splits (bool (*) (const struct casefile *,
- void *),
- void *aux);
-time_t time_of_last_procedure (void);
+
+struct dataset *create_dataset (void);
+void destroy_dataset (struct dataset *);
+
+void proc_set_source (struct dataset *ds, struct case_source *);
+bool proc_has_source (const struct dataset *ds);
+
+void proc_set_sink (struct dataset *ds, struct case_sink *);
+struct casefile *proc_capture_output (struct dataset *ds);
+
+typedef bool casefile_func (const struct casefile *, void *);
+typedef bool case_func (const struct ccase *, void *, const struct dataset *);
+typedef void begin_func (const struct ccase *, void *, const struct dataset*);
+
+typedef bool end_func (void *, const struct dataset *);
+
+typedef bool split_func (const struct ccase *, const struct casefile *,
+ void *, const struct dataset *);
+
+
+
+bool procedure (struct dataset *ds, case_func *, void *aux) WARN_UNUSED_RESULT;
+
+bool procedure_with_splits (struct dataset *ds,
+ begin_func *,
+ case_func *,
+ end_func *,
+ void *aux)
+ WARN_UNUSED_RESULT;
+bool multipass_procedure (struct dataset *ds, casefile_func *, void *aux)
+ WARN_UNUSED_RESULT;
+bool multipass_procedure_with_splits (struct dataset *ds,
+ split_func *,
+ void *aux)
+ WARN_UNUSED_RESULT;
+
+
+
+time_t time_of_last_procedure (struct dataset *ds);
\f
-/* Number of cases to lag. */
-extern int n_lag;
-struct ccase *lagged_case (int n_before);
+struct ccase *lagged_case (const struct dataset *ds, int n_before);
+
+inline struct dictionary *dataset_dict (const struct dataset *ds);
+inline void dataset_set_dict ( struct dataset *ds, struct dictionary *dict);
+
+inline int dataset_n_lag (const struct dataset *ds);
+inline void dataset_set_n_lag (struct dataset *ds, int n_lag);
+
#endif /* procedure.h */