initial checkout from wrc

1 files changed, 41 insertions, 0 deletions

diff --git a/lib/memcpy.c b/lib/memcpy.c
new file mode 100644
index 0000000..e5add26
--- /dev/null
+++ b/lib/memcpy.c
@@ -0,0 +1,41 @@
+/**
+** @file	memcpy.c
+**
+** @author	Numerous CSCI-452 classes
+**
+** @brief	C implementations of common library functions
+*/
+
+#ifndef MEMCPY_SRC_INC
+#define MEMCPY_SRC_INC
+
+#include <common.h>
+
+#include <lib.h>
+
+/**
+** memcpy(dst,src,len)
+**
+** Copy a block from one place to another
+**
+** May not correctly deal with overlapping buffers
+**
+** @param dst   Destination buffer
+** @param src   Source buffer
+** @param len   Buffer size (in bytes)
+*/
+void memcpy( void *dst, register const void *src, register uint32_t len ) {
+	register uint8_t *dest = dst;
+	register const uint8_t *source = src;
+
+	/*
+	** We could speed this up by unrolling it and copying
+	** words at a time (instead of bytes).
+	*/
+
+	while( len-- ) {
+		*dest++ = *source++;
+	}
+}
+
+#endif