X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=src%2Fdata%2Fvalue.c;h=5e94b68c2ed81b5abf656e29edca9c4df9d26e2f;hb=f49ed94900625697d344071290cf2360293c27e3;hp=20d2a33ec3ef9eae3afa12969ba3927faa9436d5;hpb=480a0746507ce73d26f528b56dc3ed80195096e0;p=pspp

diff --git a/src/data/value.c b/src/data/value.c
index 20d2a33ec3..5e94b68c2e 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); 
+}