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, 193 insertions, 0 deletions

diff --git a/REORG.TODO/time/alt_digit.c b/REORG.TODO/time/alt_digit.c
new file mode 100644
index 0000000000..e3bcea4414
--- /dev/null
+++ b/REORG.TODO/time/alt_digit.c
@@ -0,0 +1,193 @@
+/* Helper functions used by strftime/strptime to handle alternate digits.
+   Copyright (C) 1995-2017 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 <libc-lock.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include <string.h>
+#include <stdint.h>
+
+/* Some of the functions here must not be used while setlocale is called.  */
+__libc_rwlock_define (extern, __libc_setlocale_lock attribute_hidden)
+
+#define CURRENT(item) (current->values[_NL_ITEM_INDEX (item)].string)
+#define CURRENT_WSTR(item) \
+  ((wchar_t *) current->values[_NL_ITEM_INDEX (item)].wstr)
+
+static void
+_nl_init_alt_digit (struct __locale_data *current)
+{
+  struct lc_time_data *data;
+
+  if (current->private.time == NULL)
+    {
+      current->private.time = malloc (sizeof *current->private.time);
+      if (current->private.time == NULL)
+	return;
+      memset (current->private.time, 0, sizeof *current->private.time);
+      current->private.cleanup = &_nl_cleanup_time;
+    }
+  data = current->private.time;
+
+  if (! data->alt_digits_initialized)
+    {
+      const char *ptr = CURRENT (ALT_DIGITS);
+      size_t cnt;
+
+      data->alt_digits_initialized = 1;
+
+      if (ptr != NULL)
+	{
+	  data->alt_digits = malloc (100 * sizeof (const char *));
+	  if (data->alt_digits != NULL)
+	    for (cnt = 0; cnt < 100; ++cnt)
+	      {
+		data->alt_digits[cnt] = ptr;
+
+		/* Skip digit format. */
+		ptr = strchr (ptr, '\0') + 1;
+	      }
+	}
+    }
+
+}
+
+const char *
+internal_function
+_nl_get_alt_digit (unsigned int number, struct __locale_data *current)
+{
+  const char *result;
+
+  if (number >= 100 || CURRENT (ALT_DIGITS)[0] == '\0')
+    return NULL;
+
+  __libc_rwlock_wrlock (__libc_setlocale_lock);
+
+  if (current->private.time == NULL
+      || ! current->private.time->alt_digits_initialized)
+    _nl_init_alt_digit (current);
+
+  result = ((current->private.time != NULL
+	     && current->private.time->alt_digits != NULL)
+	    ? current->private.time->alt_digits[number]
+	    : NULL);
+
+  __libc_rwlock_unlock (__libc_setlocale_lock);
+
+  return result;
+}
+
+
+const wchar_t *
+internal_function
+_nl_get_walt_digit (unsigned int number, struct __locale_data *current)
+{
+  const wchar_t *result = NULL;
+  struct lc_time_data *data;
+
+  if (number >= 100 || CURRENT_WSTR (_NL_WALT_DIGITS)[0] == L'\0')
+    return NULL;
+
+  __libc_rwlock_wrlock (__libc_setlocale_lock);
+
+  if (current->private.time == NULL)
+    {
+      current->private.time = malloc (sizeof *current->private.time);
+      if (current->private.time == NULL)
+	goto out;
+      memset (current->private.time, 0, sizeof *current->private.time);
+      current->private.cleanup = &_nl_cleanup_time;
+    }
+  data = current->private.time;
+
+  if (! data->walt_digits_initialized)
+    {
+      const wchar_t *ptr = CURRENT_WSTR (_NL_WALT_DIGITS);
+      size_t cnt;
+
+      data->walt_digits_initialized = 1;
+
+      if (ptr != NULL)
+	{
+	  data->walt_digits = malloc (100 * sizeof (const uint32_t *));
+	  if (data->walt_digits != NULL)
+	    for (cnt = 0; cnt < 100; ++cnt)
+	      {
+		data->walt_digits[cnt] = ptr;
+
+		/* Skip digit format. */
+		ptr = __wcschr (ptr, L'\0') + 1;
+	      }
+	}
+    }
+
+  if (data->walt_digits != NULL)
+    result = data->walt_digits[number];
+
+ out:
+  __libc_rwlock_unlock (__libc_setlocale_lock);
+
+  return (wchar_t *) result;
+}
+
+
+int
+internal_function
+_nl_parse_alt_digit (const char **strp, struct __locale_data *current)
+{
+  const char *str = *strp;
+  int result = -1;
+  size_t cnt;
+  size_t maxlen = 0;
+
+  if (CURRENT_WSTR (_NL_WALT_DIGITS)[0] == L'\0')
+    return result;
+
+  __libc_rwlock_wrlock (__libc_setlocale_lock);
+
+  if (current->private.time == NULL
+      || ! current->private.time->alt_digits_initialized)
+    _nl_init_alt_digit (current);
+
+  if (current->private.time != NULL &&
+      current->private.time->alt_digits != NULL)
+    /* Matching is not unambiguous.  The alternative digits could be like
+       I, II, III, ... and the first one is a substring of the second
+       and third.  Therefore we must keep on searching until we found
+       the longest possible match.  Note that this is not specified in
+       the standard.  */
+    for (cnt = 0; cnt < 100; ++cnt)
+      {
+	const char *const dig = current->private.time->alt_digits[cnt];
+	size_t len = strlen (dig);
+
+	if (len > maxlen && strncmp (dig, str, len) == 0)
+	  {
+	    maxlen = len;
+	    result = (int) cnt;
+	  }
+      }
+
+  __libc_rwlock_unlock (__libc_setlocale_lock);
+
+  if (result != -1)
+    *strp += maxlen;
+
+  return result;
+}