Patch #6262. New developers guide and resulting fixes and cleanups.

[pspp-builds.git] / src / data / val-type.h

diff --git a/src/data/val-type.h b/src/data/val-type.h
new file mode 100644 (file)
index 0000000..27139af
--- /dev/null
+++ b/src/data/val-type.h
@@ -0,0 +1,55 @@
+/* PSPP - computes sample statistics.
+   Copyright (C) 2007 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, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA. */
+
+#ifndef DATA_VAL_TYPE_H
+#define DATA_VAL_TYPE_H 1
+
+#include <float.h>
+#include <stdbool.h>
+#include <libpspp/float-format.h>
+
+/* Special numeric values. */
+#define SYSMIS (-DBL_MAX)               /* System-missing value. */
+#define LOWEST (float_get_lowest ())    /* Smallest nonmissing finite value. */
+#define HIGHEST DBL_MAX                 /* Largest finite value. */
+
+/* Maximum length of a string variable. */
+#define MAX_STRING 32767
+
+/* Value type. */
+enum val_type
+  {
+    VAL_NUMERIC,              /* A numeric value. */
+    VAL_STRING                /* A string value. */
+  };
+
+/* Returns true if VAL_TYPE is a valid value type. */
+static inline bool
+val_type_is_valid (enum val_type val_type)
+{
+  return val_type == VAL_NUMERIC || val_type == VAL_STRING;
+}
+
+/* Returns the value type for the given WIDTH. */
+static inline enum val_type
+val_type_from_width (int width)
+{
+  return width != 0 ? VAL_STRING : VAL_NUMERIC;
+}
+
+#endif /* data/val-type.h */