voron

commit 73395a92ba65e1bffb4589714336a59b8a544573
parent 95d4017b221dc21551848fffb460f277eb4a5fe8
Author: sin <sin@2f30.org>
Date:   Sun, 21 Jul 2013 20:54:19 +0100

Add memmove()

Diffstat:
M
include/string.h
 | 
1
+
M
kernel/string.c
 | 
22
++++++++++++++++++++++

2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/include/string.h b/include/string.h
@@ -5,6 +5,7 @@
 
 void *memset(void *s, int c, size_t n);
 void *memcpy(void *s1, const void *s2, size_t n);
+void *memmove(void *dest, const void *src, size_t count);
 int memcmp(const void *s1, const void *s2, size_t n);
 
 #endif	/* __STRING_H */
diff --git a/kernel/string.c b/kernel/string.c
@@ -31,6 +31,28 @@ memcpy(void *s1, const void *s2, size_t n)
 	return s1;
 }
 
+void *
+memmove(void *dest, const void *src, size_t count)
+{
+	char *tmp;
+	const char *s;
+
+	if (dest <= src) {
+		tmp = dest;
+		s = src;
+		while (count--)
+			*tmp++ = *s++;
+	} else {
+		tmp = dest;
+		tmp += count;
+		s = src;
+		s += count;
+		while (count--)
+			*--tmp = *--s;
+	}
+	return dest;
+}
+
 int
 memcmp(const void *s1, const void *s2, size_t n)
 {