src/data/val-type.h

   1 /* PSPP - computes sample statistics.
   2    Copyright (C) 2007, 2011 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU General Public License as
   6    published by the Free Software Foundation; either version 3 of the
   7    License, or (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful, but
  10    WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17    02110-1301, USA. */
  18
  19 #ifndef DATA_VAL_TYPE_H
  20 #define DATA_VAL_TYPE_H 1
  21
  22 #include <float.h>
  23 #include <stdbool.h>
  24 #include "libpspp/float-format.h"
  25
  26 /* Special numeric values. */
  27 #define SYSMIS (-DBL_MAX)               /* System-missing value. */
  28 #define LOWEST (float_get_lowest ())    /* Smallest nonmissing finite value. */
  29 #define HIGHEST DBL_MAX                 /* Largest finite value. */
  30
  31 /* Maximum length of a string variable. */
  32 #define MAX_STRING 32767
  33
  34 /* Value type. */
  35 enum val_type
  36   {
  37     VAL_NUMERIC,              /* A numeric value. */
  38     VAL_STRING                /* A string value. */
  39   };
  40
  41 /* Returns true if VAL_TYPE is a valid value type. */
  42 static inline bool
  43 val_type_is_valid (enum val_type val_type)
  44 {
  45   return val_type == VAL_NUMERIC || val_type == VAL_STRING;
  46 }
  47
  48 /* Returns the value type for the given WIDTH. */
  49 static inline enum val_type
  50 val_type_from_width (int width)
  51 {
  52   return width != 0 ? VAL_STRING : VAL_NUMERIC;
  53 }
  54
  55 #endif /* data/val-type.h */