/* PSPP - a program for statistical analysis.
Copyright (C) 1997-9, 2000, 2006, 2009, 2011 Free Software Foundation, Inc.
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 . */
#ifndef TRANSFORMATIONS_H
#define TRANSFORMATIONS_H 1
#include
#include
#include "data/case.h"
/* One transformation. */
enum trns_result
{
TRNS_CONTINUE, /* Continue to next transformation. */
TRNS_BREAK, /* Break out of LOOP. */
TRNS_DROP_CASE, /* Drop this case. */
TRNS_ERROR, /* A serious error, so stop the procedure. */
TRNS_END_CASE, /* Skip to next case. INPUT PROGRAM only. */
TRNS_END_FILE /* End of input. INPUT PROGRAM only. */
};
struct ccase;
struct trns_class
{
const char *name; /* For debugging. */
enum trns_result (*execute) (void *aux, struct ccase **, casenumber);
bool (*destroy) (void *aux);
};
struct transformation
{
const struct trns_class *class;
void *aux;
};
/* A chain of transformations. */
struct trns_chain
{
struct transformation *xforms;
size_t n;
size_t allocated;
};
#define TRNS_CHAIN_INIT { .n = 0 }
void trns_chain_init (struct trns_chain *);
bool trns_chain_uninit (struct trns_chain *);
bool trns_chain_clear (struct trns_chain *);
void trns_chain_prepend (struct trns_chain *, const struct transformation *);
void trns_chain_append (struct trns_chain *, const struct transformation *);
void trns_chain_splice (struct trns_chain *, struct trns_chain *);
enum trns_result trns_chain_execute (const struct trns_chain *,
casenumber case_num, struct ccase **);
#endif /* transformations.h */