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, 312 insertions, 0 deletions

diff --git a/REORG.TODO/time/getdate.c b/REORG.TODO/time/getdate.c
new file mode 100644
index 0000000000..28ea48287f
--- /dev/null
+++ b/REORG.TODO/time/getdate.c
@@ -0,0 +1,312 @@
+/* Convert a string representation of time to a time value.
+   Copyright (C) 1997-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
+
+   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 <limits.h>
+#include <stdio.h>
+#include <stdio_ext.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <alloca.h>
+
+#define TM_YEAR_BASE 1900
+
+
+/* Prototypes for local functions.  */
+static int first_wday (int year, int mon, int wday);
+static int check_mday (int year, int mon, int mday);
+
+
+/* Set to one of the following values to indicate an error.
+     1  the DATEMSK environment variable is null or undefined,
+     2  the template file cannot be opened for reading,
+     3  failed to get file status information,
+     4  the template file is not a regular file,
+     5  an error is encountered while reading the template file,
+     6  memory allication failed (not enough memory available),
+     7  there is no line in the template that matches the input,
+     8  invalid input specification Example: February 31 or a time is
+	specified that can not be represented in a time_t (representing
+	the time in seconds since 00:00:00 UTC, January 1, 1970) */
+int getdate_err;
+
+
+/* Returns the first weekday WDAY of month MON in the year YEAR.  */
+static int
+first_wday (int year, int mon, int wday)
+{
+  struct tm tm;
+
+  if (wday == INT_MIN)
+    return 1;
+
+  memset (&tm, 0, sizeof (struct tm));
+  tm.tm_year = year;
+  tm.tm_mon = mon;
+  tm.tm_mday = 1;
+  mktime (&tm);
+
+  return (1 + (wday - tm.tm_wday + 7) % 7);
+}
+
+
+/* Returns 1 if MDAY is a valid day of the month in month MON of year
+   YEAR, and 0 if it is not.  */
+static int
+check_mday (int year, int mon, int mday)
+{
+  switch (mon)
+    {
+    case 0:
+    case 2:
+    case 4:
+    case 6:
+    case 7:
+    case 9:
+    case 11:
+      if (mday >= 1 && mday <= 31)
+	return 1;
+      break;
+    case 3:
+    case 5:
+    case 8:
+    case 10:
+      if (mday >= 1 && mday <= 30)
+	return 1;
+      break;
+    case 1:
+      if (mday >= 1 && mday <= (__isleap (year) ? 29 : 28))
+	return 1;
+      break;
+    }
+
+  return 0;
+}
+
+
+int
+__getdate_r (const char *string, struct tm *tp)
+{
+  FILE *fp;
+  char *line;
+  size_t len;
+  char *datemsk;
+  char *result = NULL;
+  time_t timer;
+  struct tm tm;
+  struct stat64 st;
+  int mday_ok = 0;
+
+  datemsk = getenv ("DATEMSK");
+  if (datemsk == NULL || *datemsk == '\0')
+    return 1;
+
+  if (stat64 (datemsk, &st) < 0)
+    return 3;
+
+  if (!S_ISREG (st.st_mode))
+    return 4;
+
+  if (__access (datemsk, R_OK) < 0)
+    return 2;
+
+  /* Open the template file.  */
+  fp = fopen (datemsk, "rce");
+  if (fp == NULL)
+    return 2;
+
+  /* No threads reading this stream.  */
+  __fsetlocking (fp, FSETLOCKING_BYCALLER);
+
+  /* Skip leading whitespace.  */
+  while (isspace (*string))
+    string++;
+
+  size_t inlen, oldlen;
+
+  oldlen = inlen = strlen (string);
+
+  /* Skip trailing whitespace.  */
+  while (inlen > 0 && isspace (string[inlen - 1]))
+    inlen--;
+
+  char *instr = NULL;
+
+  if (inlen < oldlen)
+    {
+      bool using_malloc = false;
+
+      if (__libc_use_alloca (inlen + 1))
+	instr = alloca (inlen + 1);
+      else
+	{
+	  instr = malloc (inlen + 1);
+	  if (instr == NULL)
+	    {
+	      fclose (fp);
+	      return 6;
+	    }
+	  using_malloc = true;
+	}
+      memcpy (instr, string, inlen);
+      instr[inlen] = '\0';
+      string = instr;
+
+      if (!using_malloc)
+	instr = NULL;
+    }
+
+  line = NULL;
+  len = 0;
+  do
+    {
+      ssize_t n;
+
+      n = __getline (&line, &len, fp);
+      if (n < 0)
+	break;
+      if (line[n - 1] == '\n')
+	line[n - 1] = '\0';
+
+      /* Do the conversion.  */
+      tp->tm_year = tp->tm_mon = tp->tm_mday = tp->tm_wday = INT_MIN;
+      tp->tm_hour = tp->tm_sec = tp->tm_min = INT_MIN;
+      tp->tm_isdst = -1;
+      tp->tm_gmtoff = 0;
+      tp->tm_zone = NULL;
+      result = strptime (string, line, tp);
+      if (result && *result == '\0')
+	break;
+    }
+  while (!feof_unlocked (fp));
+
+  free (instr);
+
+  /* Free the buffer.  */
+  free (line);
+
+  /* Check for errors. */
+  if (ferror_unlocked (fp))
+    {
+      fclose (fp);
+      return 5;
+    }
+
+  /* Close template file.  */
+  fclose (fp);
+
+  if (result == NULL || *result != '\0')
+    return 7;
+
+  /* Get current time.  */
+  time (&timer);
+  __localtime_r (&timer, &tm);
+
+  /* If only the weekday is given, today is assumed if the given day
+     is equal to the current day and next week if it is less.  */
+  if (tp->tm_wday >= 0 && tp->tm_wday <= 6 && tp->tm_year == INT_MIN
+      && tp->tm_mon == INT_MIN && tp->tm_mday == INT_MIN)
+    {
+      tp->tm_year = tm.tm_year;
+      tp->tm_mon = tm.tm_mon;
+      tp->tm_mday = tm.tm_mday + (tp->tm_wday - tm.tm_wday + 7) % 7;
+      mday_ok = 1;
+    }
+
+  /* If only the month is given, the current month is assumed if the
+     given month is equal to the current month and next year if it is
+     less and no year is given (the first day of month is assumed if
+     no day is given.  */
+  if (tp->tm_mon >= 0 && tp->tm_mon <= 11 && tp->tm_mday == INT_MIN)
+    {
+      if (tp->tm_year == INT_MIN)
+	tp->tm_year = tm.tm_year + (((tp->tm_mon - tm.tm_mon) < 0) ? 1 : 0);
+      tp->tm_mday = first_wday (tp->tm_year, tp->tm_mon, tp->tm_wday);
+      mday_ok = 1;
+    }
+
+  /* If no hour, minute and second are given the current hour, minute
+     and second are assumed.  */
+  if (tp->tm_hour == INT_MIN && tp->tm_min == INT_MIN && tp->tm_sec == INT_MIN)
+    {
+      tp->tm_hour = tm.tm_hour;
+      tp->tm_min = tm.tm_min;
+      tp->tm_sec = tm.tm_sec;
+    }
+
+  /* Fill in the gaps.  */
+  if (tp->tm_hour == INT_MIN)
+    tp->tm_hour = 0;
+  if (tp->tm_min == INT_MIN)
+    tp->tm_min = 0;
+  if (tp->tm_sec == INT_MIN)
+    tp->tm_sec = 0;
+
+  /* If no date is given, today is assumed if the given hour is
+     greater than the current hour and tomorrow is assumed if
+     it is less.  */
+  if (tp->tm_hour >= 0 && tp->tm_hour <= 23
+      && tp->tm_mon == INT_MIN
+      && tp->tm_mday == INT_MIN && tp->tm_wday == INT_MIN)
+    {
+      tp->tm_mon = tm.tm_mon;
+      tp->tm_mday = tm.tm_mday + ((tp->tm_hour - tm.tm_hour) < 0 ? 1 : 0);
+      mday_ok = 1;
+    }
+
+  /* More fillers.  */
+  if (tp->tm_year == INT_MIN)
+    tp->tm_year = tm.tm_year;
+  if (tp->tm_mon == INT_MIN)
+    tp->tm_mon = tm.tm_mon;
+
+  /* Check if the day of month is within range, and if the time can be
+     represented in a time_t.  We make use of the fact that the mktime
+     call normalizes the struct tm.  */
+  if ((!mday_ok && !check_mday (TM_YEAR_BASE + tp->tm_year, tp->tm_mon,
+				tp->tm_mday))
+      || mktime (tp) == (time_t) -1)
+    return 8;
+
+  return 0;
+}
+#ifdef weak_alias
+weak_alias (__getdate_r, getdate_r)
+#endif
+
+
+struct tm *
+getdate (const char *string)
+{
+  /* Buffer returned by getdate.  */
+  static struct tm tmbuf;
+  int errval = __getdate_r (string, &tmbuf);
+
+  if (errval != 0)
+    {
+      getdate_err = errval;
+      return NULL;
+    }
+
+  return &tmbuf;
+}