-/* PSPP - computes sample statistics.
- Copyright (C) 2007 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2007, 2009 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 2 of the
- License, or (at your option) any later version.
+ 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.
+ 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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Casereader client interface.
struct casereader;
struct casewriter;
-bool casereader_read (struct casereader *, struct ccase *);
+struct ccase *casereader_read (struct casereader *);
bool casereader_destroy (struct casereader *);
struct casereader *casereader_clone (const struct casereader *);
struct casereader *casereader_rename (struct casereader *);
void casereader_swap (struct casereader *, struct casereader *);
-bool casereader_peek (struct casereader *, casenumber, struct ccase *)
- WARN_UNUSED_RESULT;
+struct ccase *casereader_peek (struct casereader *, casenumber);
+bool casereader_is_empty (struct casereader *);
bool casereader_error (const struct casereader *);
void casereader_force_error (struct casereader *);
struct casewriter *exclude);
struct casereader *
casereader_create_filter_missing (struct casereader *,
- struct variable **vars, size_t var_cnt,
+ const struct variable **vars, size_t var_cnt,
enum mv_class,
+ casenumber *n_missing,
struct casewriter *exclude);
struct casereader *
struct casereader *
casereader_create_translator (struct casereader *, size_t output_value_cnt,
- void (*translate) (const struct ccase *input,
- struct ccase *output,
- void *aux),
+ struct ccase *(*translate) (struct ccase *,
+ void *aux),
bool (*destroy) (void *aux),
void *aux);
+/* A function which creates a numberic value from an existing case */
+typedef double new_value_func (const struct ccase *, casenumber, void *);
+
+struct casereader *
+casereader_create_append_numeric (struct casereader *subreader,
+ new_value_func func, void *aux,
+ void (*destroy) (void *aux));
+
+struct casereader *
+casereader_create_arithmetic_sequence (struct casereader *,
+ double first, double increment);
+
+enum rank_error
+ {
+ RANK_ERR_NONE = 0,
+ RANK_ERR_NEGATIVE_WEIGHT = 0x01,
+ RANK_ERR_UNSORTED = 0x02
+ };
+
+
+typedef void distinct_func (double v, casenumber n, double w, void *aux);
+
+struct casereader *
+casereader_create_append_rank (struct casereader *,
+ const struct variable *v, const struct variable *w,
+ enum rank_error *err,
+ distinct_func *distinct_callback, void *aux);
+
+
#endif /* data/casereader.h */