X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Flanguage%2Fexpressions%2Fhelpers.h;h=cb59c206a7599334246402cc26265854562d8483;hb=ebd0dcdfe65da02a6e541ceea0226c9b0b8d7a47;hp=f5cfb67b65d5dae1f912b023571e3c1650a20e1a;hpb=81fff61a96bece351e381ad3fef8ab1248a952ba;p=pspp

diff --git a/src/language/expressions/helpers.h b/src/language/expressions/helpers.h
index f5cfb67b65..cb59c206a7 100644
--- a/src/language/expressions/helpers.h
+++ b/src/language/expressions/helpers.h
@@ -1,4 +1,4 @@
-#ifndef EXPRESSIONS_HELPERS_H 
+#ifndef EXPRESSIONS_HELPERS_H
 #define EXPRESSIONS_HELPERS_H
 
 #include <ctype.h>
@@ -13,12 +13,14 @@
 #include <data/calendar.h>
 #include <data/case.h>
 #include <data/data-in.h>
+#include <data/data-out.h>
 #include <data/dictionary.h>
 #include <data/procedure.h>
 #include <data/settings.h>
 #include <data/value.h>
 #include <data/variable.h>
-#include <gsl-extras/gsl-extras.h>
+#include <data/vector.h>
+#include <language/expressions/public.h>
 #include <libpspp/compiler.h>
 #include <libpspp/message.h>
 #include <libpspp/misc.h>
@@ -29,7 +31,7 @@
 #include "gettext.h"
 #define _(msgid) gettext (msgid)
 
-static inline double check_errno (double x) 
+static inline double check_errno (double x)
 {
   return errno == 0 ? x : SYSMIS;
 }
@@ -42,25 +44,30 @@ static inline double check_errno (double x)
 #define H_MIN 60.                       /* Minutes per hour. */
 #define MIN_S 60.                       /* Seconds per minute. */
 #define WEEK_DAY 7.                     /* Days per week. */
+#define WEEK_S (WEEK_DAY * DAY_S)       /* Seconds per week. */
 
-extern const struct fixed_string empty_string;
+extern const struct substring empty_string;
 
-int compare_string (const struct fixed_string *, const struct fixed_string *);
+int compare_string_3way (const struct substring *, const struct substring *);
 
 double expr_ymd_to_date (double year, double month, double day);
 double expr_ymd_to_ofs (double year, double month, double day);
 double expr_wkyr_to_date (double wk, double yr);
 double expr_yrday_to_date (double yr, double day);
 double expr_yrmoda (double year, double month, double day);
+double expr_date_difference (double date1, double date2,
+                             struct substring unit);
+double expr_date_sum (double date, double quantity, struct substring unit_name,
+                      struct substring method_name);
 
-struct fixed_string alloc_string (struct expression *, size_t length);
-struct fixed_string copy_string (struct expression *,
-                                 const char *, size_t length);
+struct substring alloc_string (struct expression *, size_t length);
+struct substring copy_string (struct expression *,
+                              const char *, size_t length);
 
 static inline bool
-is_valid (double d) 
+is_valid (double d)
 {
-  return finite (d) && d != SYSMIS;
+  return isfinite (d) && d != SYSMIS;
 }
 
 size_t count_valid (double *, size_t);