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, 89 insertions, 0 deletions

diff --git a/REORG.TODO/time/asctime.c b/REORG.TODO/time/asctime.c
new file mode 100644
index 0000000000..b57de7dc8b
--- /dev/null
+++ b/REORG.TODO/time/asctime.c
@@ -0,0 +1,89 @@
+/* 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 "../locale/localeinfo.h"
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <time.h>
+
+/* This is defined in locale/C-time.c in the GNU libc.  */
+extern const struct __locale_data _nl_C_LC_TIME attribute_hidden;
+#define ab_day_name(DAY) (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)+(DAY)].string)
+#define ab_month_name(MON) (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)+(MON)].string)
+
+static const char format[] = "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n";
+static char result[		 3+1+ 3+1+20+1+20+1+20+1+20+1+20+1 + 1];
+
+
+static char *
+asctime_internal (const struct tm *tp, char *buf, size_t buflen)
+{
+  if (tp == NULL)
+    {
+      __set_errno (EINVAL);
+      return NULL;
+    }
+
+  /* We limit the size of the year which can be printed.  Using the %d
+     format specifier used the addition of 1900 would overflow the
+     number and a negative vaue is printed.  For some architectures we
+     could in theory use %ld or an evern larger integer format but
+     this would mean the output needs more space.  This would not be a
+     problem if the 'asctime_r' interface would be defined sanely and
+     a buffer size would be passed.  */
+  if (__glibc_unlikely (tp->tm_year > INT_MAX - 1900))
+    {
+    eoverflow:
+      __set_errno (EOVERFLOW);
+      return NULL;
+    }
+
+  int n = __snprintf (buf, buflen, format,
+		      (tp->tm_wday < 0 || tp->tm_wday >= 7 ?
+		       "???" : ab_day_name (tp->tm_wday)),
+		      (tp->tm_mon < 0 || tp->tm_mon >= 12 ?
+		       "???" : ab_month_name (tp->tm_mon)),
+		      tp->tm_mday, tp->tm_hour, tp->tm_min,
+		      tp->tm_sec, 1900 + tp->tm_year);
+  if (n < 0)
+    return NULL;
+  if (n >= buflen)
+    goto eoverflow;
+
+  return buf;
+}
+
+
+/* Like asctime, but write result to the user supplied buffer.  The
+   buffer is only guaranteed to be 26 bytes in length.  */
+char *
+__asctime_r (const struct tm *tp, char *buf)
+{
+  return asctime_internal (tp, buf, 26);
+}
+weak_alias (__asctime_r, asctime_r)
+
+
+/* Returns a string of the form "Day Mon dd hh:mm:ss yyyy\n"
+   which is the representation of TP in that form.  */
+char *
+asctime (const struct tm *tp)
+{
+  return asctime_internal (tp, result, sizeof (result));
+}
+libc_hidden_def (asctime)