Imported Upstream version 4.1cupstream/4.1cupstream

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/memmove.c b/lib/memmove.c
new file mode 100644
index 0000000..c5ff8b5
--- /dev/null
+++ b/lib/memmove.c
@@ -0,0 +1,26 @@
+/* memmove.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>.  */
+
+#include <config.h>
+
+#include <stddef.h>
+
+void *
+memmove (void *dest0, void const *source0, size_t length)
+{
+  char *dest = dest0;
+  char const *source = source0;
+  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++;
+    }
+  return dest0;
+}