1 files changed, 74 insertions, 0 deletions
diff --git a/REORG.TODO/string/_strerror.c b/REORG.TODO/string/_strerror.c
new file mode 100644
index 0000000000..4d3a52d906
--- /dev/null
+++ b/REORG.TODO/string/_strerror.c
@@ -0,0 +1,74 @@
+/* Copyright (C) 1991-2017 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 <libintl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+#include <_itoa.h>
+
+/* It is critical here that we always use the `dcgettext' function for
+   the message translation.  Since <libintl.h> only defines the macro
+   `dgettext' to use `dcgettext' for optimizing programs this is not
+   always guaranteed.  */
+#ifndef dgettext
+# include <locale.h>		/* We need LC_MESSAGES.  */
+# define dgettext(domainname, msgid) dcgettext (domainname, msgid, LC_MESSAGES)
+#endif
+
+/* Return a string describing the errno code in ERRNUM.  */
+char *
+__strerror_r (int errnum, char *buf, size_t buflen)
+{
+  if (__builtin_expect (errnum < 0 || errnum >= _sys_nerr_internal
+			|| _sys_errlist_internal[errnum] == NULL, 0))
+    {
+      /* Buffer we use to print the number in.  For a maximum size for
+	 `int' of 8 bytes we never need more than 20 digits.  */
+      char numbuf[21];
+      const char *unk = _("Unknown error ");
+      size_t unklen = strlen (unk);
+      char *p, *q;
+      bool negative = errnum < 0;
+
+      numbuf[20] = '\0';
+      p = _itoa_word (abs (errnum), &numbuf[20], 10, 0);
+
+      /* Now construct the result while taking care for the destination
+	 buffer size.  */
+      q = __mempcpy (buf, unk, MIN (unklen, buflen));
+      if (negative && unklen < buflen)
+	{
+	  *q++ = '-';
+	  ++unklen;
+	}
+      if (unklen < buflen)
+	memcpy (q, p, MIN ((size_t) (&numbuf[21] - p), buflen - unklen));
+
+      /* Terminate the string in any case.  */
+      if (buflen > 0)
+	buf[buflen - 1] = '\0';
+
+      return buf;
+    }
+
+  return (char *) _(_sys_errlist_internal[errnum]);
+}
+weak_alias (__strerror_r, strerror_r)
+libc_hidden_def (__strerror_r)