Changeset e353e85 in mainline for kernel/generic/src/lib/memfnc.c

Timestamp:

2011-04-01T11:59:10Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

9b640c42

Parents:

cd1e6b62 (diff), 27bdfa5 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Development branch changes

File:

• kernel/generic/src/lib/memfnc.c (moved) (moved from kernel/arch/amd64/include/memstr.h ) (2 diffs)

kernel/generic/src/lib/memfnc.c

@@ -1 @@
-/*
- * Copyright (c) 2005 Sergey Bondari
+        /*
+ * Copyright (c) 2011 Martin Decky
  * All rights reserved.
  *
@@ -27 +27 @@
  */
 
-/** @addtogroup amd64
+/** @addtogroup generic
  * @{
  */
-/** @file
+
+/**
+ * @file
+ * @brief Memory string functions.
+ *
+ * This file provides architecture independent functions to manipulate blocks
+ * of memory. These functions are optimized as much as generic functions of
+ * this type can be.
  */
 
-#ifndef KERN_amd64_MEMSTR_H_
-#define KERN_amd64_MEMSTR_H_
+#include <lib/memfnc.h>
+#include <typedefs.h>
 
-#define memcpy(dst, src, cnt)  __builtin_memcpy((dst), (src), (cnt))
+/** Fill block of memory.
+ *
+ * Fill cnt bytes at dst address with the value val.
+ *
+ * @param dst Destination address to fill.
+ * @param val Value to fill.
+ * @param cnt Number of bytes to fill.
+ *
+ * @return Destination address.
+ *
+ */
+void *memset(void *dst, int val, size_t cnt)
+{
+        size_t i;
+        uint8_t *ptr = (uint8_t *) dst;
+        
+        for (i = 0; i < cnt; i++)
+                ptr[i] = val;
+        
+        return dst;
+}
 
-extern void memsetw(void *, size_t, uint16_t);
-extern void memsetb(void *, size_t, uint8_t);
-
-#endif
+/** Move memory block without overlapping.
+ *
+ * Copy cnt bytes from src address to dst address. The source
+ * and destination memory areas cannot overlap.
+ *
+ * @param dst Destination address to copy to.
+ * @param src Source address to copy from.
+ * @param cnt Number of bytes to copy.
+ *
+ * @return Destination address.
+ *
+ */
+void *memcpy(void *dst, const void *src, size_t cnt)
+{
+        uint8_t *dp = (uint8_t *) dst;
+        const uint8_t *sp = (uint8_t *) src;
+        
+        while (cnt-- != 0)
+                        *dp++ = *sp++;
+        
+        return dst;
+}
 
 /** @}