X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fvalue-labels.h;h=f0f7ce01264c392552f7b96d130be6577ddb50a9;hb=7235f7f42b61c2b111174c3ee5ca72aac8815cd5;hp=253990ea5a8beec3f564abc4088aad54b407d59a;hpb=480a0746507ce73d26f528b56dc3ed80195096e0;p=pspp
diff --git a/src/data/value-labels.h b/src/data/value-labels.h
index 253990ea5a..f0f7ce0126 100644
--- a/src/data/value-labels.h
+++ b/src/data/value-labels.h
@@ -1,60 +1,118 @@
-/* PSPP - computes sample statistics.
- Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 1997-9, 2000, 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 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 . */
-#ifndef VAL_LABS_H
-#define VAL_LABS_H 1
+/* Sets of value labels.
+
+ struct val_labs represents a mapping from `union value's to
+ strings. The `union value's in the mapping all have the same
+ width. If this width is numeric or short string, the mapping
+ may contain any number of entries; long string mappings are
+ always empty. */
+
+#ifndef DATA_VALUE_LABELS_H
+#define DATA_VALUE_LABELS_H 1
#include
#include
+#include "data/value.h"
+#include "libpspp/hmap.h"
+
+/* One value label.
+
+ A value label is normally part of a struct val_labs (see
+ below). */
+struct val_lab
+ {
+ struct hmap_node node; /* Node in hash map. */
+ union value value; /* The value being labeled. */
+ const char *label; /* An interned string. */
+ const char *escaped_label; /* An interned string. */
+ };
-#include
+/* Returns the value in VL. The caller must not modify or free
+ the returned value.
-struct val_labs;
-struct variable;
+ The width of the returned value cannot be determined directly
+ from VL. It may be obtained by calling val_labs_get_width on
+ the val_labs struct that VL is in. */
+static inline const union value *val_lab_get_value (const struct val_lab *vl)
+{
+ return &vl->value;
+}
-struct val_lab
+/* Returns the label in VL as a UTF-8 encoded interned string, in a format
+ appropriate for use in output. The caller must not modify or free the
+ returned value. */
+static inline const char *
+val_lab_get_label (const struct val_lab *vl)
+{
+ return vl->label;
+}
+
+/* Returns the label in VL as a UTF-8 encoded interned string. Any new-line
+ characters in the label's usual output form are represented in the returned
+ string as the two-byte sequence "\\n". This form is used on the VALUE
+ LABELS command, in system and portable files, and passed to val_labs_add()
+ and val_labs_replace().
+
+ The caller must not modify or free the returned value. */
+static inline const char *
+val_lab_get_escaped_label (const struct val_lab *vl)
+{
+ return vl->escaped_label;
+}
+
+/* A set of value labels. */
+struct val_labs
{
- union value value;
- const char *label;
+ int width; /* 0=numeric, otherwise string width. */
+ struct hmap labels; /* Hash table of `struct val_lab's. */
};
+/* Creating and destroying sets of value labels. */
struct val_labs *val_labs_create (int width);
-struct val_labs *val_labs_copy (const struct val_labs *);
-void val_labs_destroy (struct val_labs *);
+struct val_labs *val_labs_clone (const struct val_labs *);
void val_labs_clear (struct val_labs *);
+void val_labs_destroy (struct val_labs *);
size_t val_labs_count (const struct val_labs *);
+/* Looking up value labels. */
+const char *val_labs_find (const struct val_labs *, const union value *);
+struct val_lab *val_labs_lookup (const struct val_labs *,
+ const union value *);
+
+/* Basic properties. */
+size_t val_labs_count (const struct val_labs *);
+int val_labs_get_width (const struct val_labs *);
bool val_labs_can_set_width (const struct val_labs *, int new_width);
void val_labs_set_width (struct val_labs *, int new_width);
-bool val_labs_add (struct val_labs *, union value, const char *);
-void val_labs_replace (struct val_labs *, union value, const char *);
-bool val_labs_remove (struct val_labs *, union value);
-char *val_labs_find (const struct val_labs *, union value);
+/* Adding value labels. */
+bool val_labs_add (struct val_labs *, const union value *, const char *);
+void val_labs_replace (struct val_labs *, const union value *, const char *);
+void val_labs_remove (struct val_labs *, struct val_lab *);
-struct val_labs_iterator;
+/* Iterating through value labels. */
+const struct val_lab *val_labs_first (const struct val_labs *);
+const struct val_lab *val_labs_next (const struct val_labs *,
+ const struct val_lab *);
+const struct val_lab **val_labs_sorted (const struct val_labs *);
-struct val_lab *val_labs_first (const struct val_labs *,
- struct val_labs_iterator **);
-struct val_lab *val_labs_first_sorted (const struct val_labs *,
- struct val_labs_iterator **);
-struct val_lab *val_labs_next (const struct val_labs *,
- struct val_labs_iterator **);
-void val_labs_done (struct val_labs_iterator **);
+/* Properties of entire sets. */
+unsigned int val_labs_hash (const struct val_labs *, unsigned int basis);
+bool val_labs_equal (const struct val_labs *, const struct val_labs *);
-#endif /* value-labels.h */
+#endif /* data/value-labels.h */