Initial revision

lang/cem/libcc.ansi/string/memmove.c

@@ -0,0 +1,28 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
+/* $Header$ */
+
+#include	<string.h>
+
+void *
+memmove(register void *s1, register const void *s2, register size_t n)
+{
+	void *ret = s1;
+
+	if (s2 <= s1 && s2 + (n-1) >= s1) {
+		/* overlap, copy backwards */
+		s1 += n;
+		s2 += n;
+		while (n > 0) {
+			n--;
+			*--s1 = *--s2;
+		}
+	} else
+		while (n > 0) {
+			n--;
+			*s1++ = *s2++;
+		}
+	return ret;
+}