20060303a

1 files changed, 43 insertions, 0 deletions

diff --git a/libkern/memmove.c b/libkern/memmove.c
new file mode 100644
index 00000000..a1455f51
--- /dev/null
+++ b/libkern/memmove.c
@@ -0,0 +1,43 @@
+#include	<lib9.h>
+
+/* for testing only */
+void*
+memcpy(void *a1, void *a2, ulong n)
+{
+	return memmove(a1, a2, n);
+}
+
+void*
+memmove(void *a1, void *a2, ulong n)
+{
+	int m = (int)n;
+	uchar *s, *d;
+	
+	d = a1;
+	s = a2;
+	if(d > s){
+		s += m;
+		d += m;
+		while(--m >= 0)
+			*--d = *--s;
+	}
+	else{
+		while(--m >= 0)
+			*d++ = *s++;
+	}
+	return a1;
+}
+
+/*
+void
+memset(void *a1, int c, ulong n)
+{
+	int m = (int)n;
+	uchar *d;
+
+	d = a1;
+	while(--m >= 0)
+		*d++ = c;
+}
+*/
+