From: Ben Pfaff <blp@gnu.org>
Date: Wed, 27 May 2009 06:04:32 +0000 (-0700)
Subject: value: New function value_swap.
X-Git-Tag: v0.7.3~69
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=388fb23b17cd58ec28964cca517fcd79dea92197;p=pspp-builds.git

value: New function value_swap.
---

diff --git a/src/data/value.h b/src/data/value.h
index a28b1855..046a9a3a 100644
--- a/src/data/value.h
+++ b/src/data/value.h
@@ -78,6 +78,8 @@ bool value_is_resizable (const union value *, int old_width, int new_width);
 bool value_needs_resize (int old_width, int new_width);
 void value_resize (union value *, int old_width, int new_width);
 
+static inline void value_swap (union value *, union value *);
+
 struct pool;
 void value_init_pool (struct pool *, union value *, int width);
 void value_resize_pool (struct pool *, union value *,
@@ -180,4 +182,13 @@ value_copy (union value *dst, const union value *src, int width)
     memcpy (dst->long_string, src->long_string, width);
 }
 
+/* Exchanges the contents of A and B. */
+static inline void
+value_swap (union value *a, union value *b)
+{
+  union value tmp = *a;
+  *a = *b;
+  *b = tmp;
+}
+
 #endif /* data/value.h */