[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/string/swab.c b/ap/libc/glibc/glibc-2.23/string/swab.c
new file mode 100644
index 0000000..cbd8d57
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/string/swab.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 1992-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <unistd.h>
+
+void
+swab (const void *bfrom, void *bto, ssize_t n)
+{
+ const char *from = (const char *) bfrom;
+ char *to = (char *) bto;
+
+ n &= ~((ssize_t) 1);
+ while (n > 1)
+ {
+ const char b0 = from[--n], b1 = from[--n];
+ to[n] = b0;
+ to[n + 1] = b1;
+ }
+}