initial checkout from wrc

1 files changed, 37 insertions, 0 deletions

diff --git a/lib/memclr.c b/lib/memclr.c
new file mode 100644
index 0000000..490fc6d
--- /dev/null
+++ b/lib/memclr.c
@@ -0,0 +1,37 @@
+/**
+** @file	memclr.c
+**
+** @author	Numerous CSCI-452 classes
+**
+** @brief	C implementations of common library functions
+*/
+
+#ifndef MEMCLR_SRC_INC
+#define MEMCLR_SRC_INC
+
+#include <common.h>
+
+#include <lib.h>
+
+/**
+** memclr(buf,len)
+**
+** Initialize all bytes of a block of memory to zero
+**
+** @param buf    The buffer to initialize
+** @param len    Buffer size (in bytes)
+*/
+void memclr( void *buf, register uint32_t len ) {
+	register uint8_t *dest = buf;
+
+	/*
+	** We could speed this up by unrolling it and clearing
+	** words at a time (instead of bytes).
+	*/
+
+	while( len-- ) {
+			*dest++ = 0;
+	}
+}
+
+#endif