Initial revision

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/bcopy.c b/lib/bcopy.c
new file mode 100644
index 0000000000..a8991c570d
--- /dev/null
+++ b/lib/bcopy.c
@@ -0,0 +1,19 @@
+/* bcopy.c -- copy memory.
+   Copy LENGTH bytes from SOURCE to DEST.  Does not null-terminate.
+   In the public domain.
+   By David MacKenzie <djm@gnu.ai.mit.edu>.  */
+
+void
+bcopy (source, dest, length)
+     char *source, *dest;
+     unsigned length;
+{
+  if (source < dest)
+    /* Moving from low mem to hi mem; start at end.  */
+    for (source += length, dest += length; length; --length)
+      *--dest = *--source;
+  else if (source != dest)
+    /* Moving from hi mem to low mem; start at beginning.  */
+    for (; length; --length)
+      *dest++ = *source++;
+}