From: Ben Pfaff <blp@gnu.org>
Date: Mon, 23 Apr 2007 01:30:22 +0000 (+0000)
Subject: Patch #5886.
X-Git-Tag: v0.6.0~482
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b5f633cb2139ad17ce66cb4433b3a96276ccb1a9;p=pspp-builds.git

Patch #5886.

(value_copy): New function.
(value_set_missing): Ditto.
---

diff --git a/src/data/ChangeLog b/src/data/ChangeLog
index 73aba2ff..73177f5b 100644
--- a/src/data/ChangeLog
+++ b/src/data/ChangeLog
@@ -1,3 +1,8 @@
+2007-04-22  Ben Pfaff  <blp@gnu.org>
+
+	* value.c (value_copy): New function.
+	(value_set_missing): Ditto.
+
 2007-04-22 John Darrington <john@darrington.wattle.id.au>
 
 	* Deleted existing category.h and moved cat-routines.h into 
diff --git a/src/data/value.c b/src/data/value.c
index 20d2a33e..5e94b68c 100644
--- a/src/data/value.c
+++ b/src/data/value.c
@@ -53,3 +53,25 @@ hash_value (const union value *v, int width)
           ? hsh_hash_double (v->f)
           : hsh_hash_bytes (v->s, MIN (MAX_SHORT_STRING, width)));
 }
+
+/* Copies SRC to DST, given that they both contain data of the
+   given WIDTH. */
+void
+value_copy (union value *dst, const union value *src, int width) 
+{
+  if (width == 0)
+    dst->f = src->f;
+  else
+    memcpy (dst->s, src->s, width);
+}
+
+/* Sets V to the system-missing value for data of the given
+   WIDTH. */
+void
+value_set_missing (union value *v, int width) 
+{
+  if (width == 0)
+    v->f = SYSMIS;
+  else
+    memset (v->s, ' ', width); 
+}
diff --git a/src/data/value.h b/src/data/value.h
index 97d07b46..e3e3f0de 100644
--- a/src/data/value.h
+++ b/src/data/value.h
@@ -50,4 +50,7 @@ union value *value_dup (const union value *, int width);
 int compare_values (const union value *, const union value *, int width);
 unsigned hash_value (const union value  *, int width);
 
+void value_copy (union value *, const union value *, int width);
+void value_set_missing (union value *, int width);
+
 #endif /* !value.h */