X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fcasereader.h;h=06f7a7b13a2cf872644cc9b8fc62d23c291ad3d1;hb=5610084f0ead4b6a7d53af239f4789ba60fda024;hp=3b903bbfd52d66cdba8ffe0e960fa7f0d1ef2474;hpb=b40baf410822471fbdeeec553693619d60d7c7b6;p=pspp

diff --git a/src/data/casereader.h b/src/data/casereader.h
index 3b903bbfd5..06f7a7b13a 100644
--- a/src/data/casereader.h
+++ b/src/data/casereader.h
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 2007, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009, 2010, 2011, 2013 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
@@ -18,10 +18,10 @@
 
    A casereader abstracts interfaces through which cases may be
    read.  A casereader may be a front-end for a system file, a
-   portable file, the active file in a data set, or anything else
-   on which a casereader interface has been overlaid.  Casereader
-   layering, in which a casereader acts as a filter or translator
-   on top of another casereader, is also supported.
+   portable file, a dataset, or anything else on which a
+   casereader interface has been overlaid.  Casereader layering,
+   in which a casereader acts as a filter or translator on top of
+   another casereader, is also supported.
 
    There is no central interface for obtaining casereaders: a
    casereader for reading a system file is obtained from the
@@ -51,36 +51,39 @@
 #ifndef DATA_CASEREADER_H
 #define DATA_CASEREADER_H 1
 
-#include <libpspp/compiler.h>
-#include <data/case.h>
-#include <data/missing-values.h>
+#include "libpspp/compiler.h"
+#include "data/case.h"
+#include "data/missing-values.h"
 
 struct dictionary;
 struct casereader;
 struct casewriter;
+struct subcase;
 
 struct ccase *casereader_read (struct casereader *);
 bool casereader_destroy (struct casereader *);
 
 struct casereader *casereader_clone (const struct casereader *);
-void casereader_split (struct casereader *,
-                       struct casereader **, struct casereader **);
 struct casereader *casereader_rename (struct casereader *);
 void casereader_swap (struct casereader *, struct casereader *);
 
-struct ccase *casereader_peek (struct casereader *, casenumber);
-bool casereader_is_empty (struct casereader *);
+struct ccase *casereader_peek (const struct casereader *, casenumber);
+bool casereader_is_empty (const struct casereader *);
 
 bool casereader_error (const struct casereader *);
 void casereader_force_error (struct casereader *);
 const struct taint *casereader_get_taint (const struct casereader *);
 
-casenumber casereader_get_case_cnt (struct casereader *);
-casenumber casereader_count_cases (struct casereader *);
+casenumber casereader_get_n_cases (struct casereader *);
+casenumber casereader_count_cases (const struct casereader *);
+void casereader_truncate (struct casereader *, casenumber);
 const struct caseproto *casereader_get_proto (const struct casereader *);
 
+casenumber casereader_advance (struct casereader *, casenumber);
 void casereader_transfer (struct casereader *, struct casewriter *);
 
+struct casereader *casereader_create_empty (const struct caseproto *);
+
 struct casereader *
 casereader_create_filter_func (struct casereader *,
                                bool (*include) (const struct ccase *,
@@ -95,7 +98,7 @@ casereader_create_filter_weight (struct casereader *,
                                  struct casewriter *exclude);
 struct casereader *
 casereader_create_filter_missing (struct casereader *,
-                                  const struct variable **vars, size_t var_cnt,
+                                  const struct variable *const *vars, size_t n_vars,
                                   enum mv_class,
 				  casenumber *n_missing,
                                   struct casewriter *exclude);
@@ -104,13 +107,28 @@ struct casereader *
 casereader_create_counter (struct casereader *, casenumber *counter,
                            casenumber initial_value);
 
+struct casereader_translator_class
+  {
+    struct ccase *(*translate) (struct ccase *, void *aux);
+    bool (*destroy) (void *aux);
+  };
 struct casereader *
 casereader_create_translator (struct casereader *,
                               const struct caseproto *output_proto,
-                              struct ccase *(*translate) (struct ccase *,
-                                                          void *aux),
-                              bool (*destroy) (void *aux),
+                              const struct casereader_translator_class *,
                               void *aux);
+struct casereader *
+casereader_translate_stateless (struct casereader *,
+                                const struct caseproto *output_proto,
+                                const struct casereader_translator_class *,
+                                void *aux);
+
+struct casereader *casereader_project (struct casereader *,
+                                       const struct subcase *);
+struct casereader *casereader_project_1 (struct casereader *, int column);
+struct casereader *casereader_select (struct casereader *,
+                                      casenumber first, casenumber last,
+                                      casenumber by);
 
 /* A function which creates a numberic value from an existing case */
 typedef double new_value_func (const struct ccase *, casenumber, void *);