Changeset b169619 in mainline for kernel/generic/src/lib/mem.c

Timestamp:

2023-10-27T17:38:32Z (15 months ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

master, topic/msim-upgrade, topic/simplify-dev-export

Children:

44e8541

Parents:

c89ae25

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-27 13:19:20)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2023-10-27 17:38:32)

Message:

Deduplicate mem functions

There are a number of functions which are copied between
kernel, libc, and potentially boot too. mem*() functions
are first such offenders. All this duplicate code will
be moved to directory 'common'.

File:

• kernel/generic/src/lib/mem.c (modified) (2 diffs)

kernel/generic/src/lib/mem.c

@@ -41 +41 @@
  */
 
-#include <mem.h>
+#include <memw.h>
 #include <typedefs.h>
 
@@ -77 +77 @@
 }
 
-/** Move memory block with possible overlapping.
- *
- * Copy cnt bytes from src address to dst address. The source
- * and destination memory areas may 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 *memmove(void *dst, const void *src, size_t cnt)
-{
-        /* Nothing to do? */
-        if (src == dst)
-                return dst;
-
-        /* Non-overlapping? */
-        if ((dst >= src + cnt) || (src >= dst + cnt))
-                return memcpy(dst, src, cnt);
-
-        uint8_t *dp;
-        const uint8_t *sp;
-
-        /* Which direction? */
-        if (src > dst) {
-                /* Forwards. */
-                dp = dst;
-                sp = src;
-
-                while (cnt-- != 0)
-                        *dp++ = *sp++;
-        } else {
-                /* Backwards. */
-                dp = dst + (cnt - 1);
-                sp = src + (cnt - 1);
-
-                while (cnt-- != 0)
-                        *dp-- = *sp--;
-        }
-
-        return dst;
-}
-
 /** @}
  */