1 files changed, 30 insertions, 0 deletions
diff --git a/sys/libc/cvfnbrk.c b/sys/libc/cvfnbrk.c
new file mode 100644
index 00000000..346b07fb
--- /dev/null
+++ b/sys/libc/cvfnbrk.c
@@ -0,0 +1,30 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+*/
+
+#define	import_spp
+#define	import_libc
+#define import_knames
+#include <iraf.h>
+
+
+/* C_VFNBRK -- Break a virtual filename (or host filename) into its component
+** parts, i.e., logical directory (ldir), root, and extension.  No characters
+** are actually moved, rather, the offsets to the root and extn fields are
+** returned as output arguments.
+*/
+void
+c_vfnbrk (
+  char	*vfn,			/* virtual filename (or osfn)	*/
+  int	*root,			/* offset of root field.	*/
+  int	*extn			/* offset of extn field.	*/
+)
+{
+	XCHAR	sppvfn[SZ_PATHNAME];
+	XINT    x_root = *root, x_extn = extn;
+
+	ZFNBRK (c_strupk(vfn,sppvfn,SZ_PATHNAME), &x_root, &x_extn);
+
+	/* Make offsets zero-indexed. */
+	*root -= 1;
+	*extn -= 1;
+}