Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

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)