/* PSPP - a program for statistical analysis.
- Copyright (C) 1997-9, 2000, 2009 Free Software Foundation, Inc.
+ Copyright (C) 1997-9, 2000, 2009, 2011, 2012 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
#include <stdbool.h>
#include <stddef.h>
-#include <data/value.h>
-#include <libpspp/hmap.h>
+#include "data/value.h"
+#include "libpspp/hmap.h"
/* One value label.
{
struct hmap_node node; /* Node in hash map. */
union value value; /* The value being labeled. */
- struct atom *label; /* A ref-counted string. */
+ const char *label; /* An interned string. */
+ const char *escaped_label; /* An interned string. */
};
/* Returns the value in VL. The caller must not modify or free
return &vl->value;
}
-const char *val_lab_get_label (const 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;
+}
\f
/* A set of value labels. */
struct val_labs
{
int width; /* 0=numeric, otherwise string width. */
- struct hmap labels; /* Hash table of `struct int_val_lab's. */
+ struct hmap labels; /* Hash table of `struct val_lab's. */
};
/* Creating and destroying sets of value labels. */
/* 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 *);
+ const union value *);
+const union value *val_labs_find_value (const struct val_labs *,
+ const char *label);
/* Basic properties. */
size_t val_labs_count (const struct val_labs *);
const struct val_lab *);
const struct val_lab **val_labs_sorted (const struct val_labs *);
+/* 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 /* data/value-labels.h */