[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/string/xpg-strerror.c b/ap/libc/glibc/glibc-2.23/string/xpg-strerror.c
new file mode 100644
index 0000000..d34d503
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/string/xpg-strerror.c
@@ -0,0 +1,53 @@
+/* Copyright (C) 1991-2016 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 <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/param.h>
+
+
+/* Fill buf with a string describing the errno code in ERRNUM. */
+int
+__xpg_strerror_r (int errnum, char *buf, size_t buflen)
+{
+ const char *estr = __strerror_r (errnum, buf, buflen);
+
+ /* We know that __strerror_r returns buf (with a dynamically computed
+ string) if errnum is invalid, otherwise it returns a string whose
+ storage has indefinite extent. */
+ if (estr == buf)
+ {
+ assert (errnum < 0 || errnum >= _sys_nerr_internal
+ || _sys_errlist_internal[errnum] == NULL);
+ return EINVAL;
+ }
+ else
+ {
+ assert (errnum >= 0 && errnum < _sys_nerr_internal
+ && _sys_errlist_internal[errnum] != NULL);
+
+ size_t estrlen = strlen (estr);
+
+ /* Terminate the string in any case. */
+ if (buflen > 0)
+ *((char *) __mempcpy (buf, estr, MIN (buflen - 1, estrlen))) = '\0';
+
+ return buflen <= estrlen ? ERANGE : 0;
+ }
+}