From 458120dd40db6b4df55a4e96b650e16798ef06a0 Mon Sep 17 00:00:00 2001
From: cinap_lenrek <cinap_lenrek@localhost>
Date: Tue, 3 May 2011 11:25:13 +0000
Subject: add hg and python

---
 sys/src/cmd/python/Python/memmove.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 sys/src/cmd/python/Python/memmove.c

(limited to 'sys/src/cmd/python/Python/memmove.c')

diff --git a/sys/src/cmd/python/Python/memmove.c b/sys/src/cmd/python/Python/memmove.c
new file mode 100644
index 000000000..6fb0dad93
--- /dev/null
+++ b/sys/src/cmd/python/Python/memmove.c
@@ -0,0 +1,25 @@
+
+/* A perhaps slow but I hope correct implementation of memmove */
+
+extern char *memcpy(char *, char *, int);
+
+char *
+memmove(char *dst, char *src, int n)
+{
+	char *realdst = dst;
+	if (n <= 0)
+		return dst;
+	if (src >= dst+n || dst >= src+n)
+		return memcpy(dst, src, n);
+	if (src > dst) {
+		while (--n >= 0)
+			*dst++ = *src++;
+	}
+	else if (src < dst) {
+		src += n;
+		dst += n;
+		while (--n >= 0)
+			*--dst = *--src;
+	}
+	return realdst;
+}
-- 
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