2 files changed, 235 insertions, 0 deletions
diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/lib/posixtm.c b/gnulib/lib/posixtm.c
new file mode 100644
index 0000000..16e333f
--- /dev/null
+++ b/gnulib/lib/posixtm.c
@@ -0,0 +1,235 @@
+/* Parse dates for touch and date.
+
+   Copyright (C) 1989-1991, 1998, 2000-2011 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Yacc-based version written by Jim Kingdon and David MacKenzie.
+   Rewritten by Jim Meyering.  */
+
+#include <config.h>
+
+#include "posixtm.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <string.h>
+
+#if USE_UNLOCKED_IO
+# include "unlocked-io.h"
+#endif
+
+/* ISDIGIT differs from isdigit, as follows:
+   - Its arg may be any int or unsigned int; it need not be an unsigned char
+     or EOF.
+   - It's typically faster.
+   POSIX says that only '0' through '9' are digits.  Prefer ISDIGIT to
+   isdigit unless it's important to use the locale's definition
+   of `digit' even when the host does not conform to POSIX.  */
+#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
+
+/*
+  POSIX requires:
+
+  touch -t [[CC]YY]mmddhhmm[.ss] FILE...
+    8, 10, or 12 digits, followed by optional .ss
+    (PDS_LEADING_YEAR | PDS_CENTURY | PDS_SECONDS)
+
+  touch mmddhhmm[YY] FILE... (obsoleted by POSIX 1003.1-2001)
+    8 or 10 digits, YY (if present) must be in the range 69-99
+    (PDS_TRAILING_YEAR | PDS_PRE_2000)
+
+  date mmddhhmm[[CC]YY]
+    8, 10, or 12 digits
+    (PDS_TRAILING_YEAR | PDS_CENTURY)
+
+*/
+
+static int
+year (struct tm *tm, const int *digit_pair, size_t n, unsigned int syntax_bits)
+{
+  switch (n)
+    {
+    case 1:
+      tm->tm_year = *digit_pair;
+      /* Deduce the century based on the year.
+         POSIX requires that 00-68 be interpreted as 2000-2068,
+         and that 69-99 be interpreted as 1969-1999.  */
+      if (digit_pair[0] <= 68)
+        {
+          if (syntax_bits & PDS_PRE_2000)
+            return 1;
+          tm->tm_year += 100;
+        }
+      break;
+
+    case 2:
+      if (! (syntax_bits & PDS_CENTURY))
+        return 1;
+      tm->tm_year = digit_pair[0] * 100 + digit_pair[1] - 1900;
+      break;
+
+    case 0:
+      {
+        time_t now;
+        struct tm *tmp;
+
+        /* Use current year.  */
+        time (&now);
+        tmp = localtime (&now);
+        if (! tmp)
+          return 1;
+        tm->tm_year = tmp->tm_year;
+      }
+      break;
+
+    default:
+      abort ();
+    }
+
+  return 0;
+}
+
+static int
+posix_time_parse (struct tm *tm, const char *s, unsigned int syntax_bits)
+{
+  const char *dot = NULL;
+  int pair[6];
+  int *p;
+  size_t i;
+
+  size_t s_len = strlen (s);
+  size_t len = (((syntax_bits & PDS_SECONDS) && (dot = strchr (s, '.')))
+                ? (size_t) (dot - s)
+                : s_len);
+
+  if (len != 8 && len != 10 && len != 12)
+    return 1;
+
+  if (dot)
+    {
+      if (!(syntax_bits & PDS_SECONDS))
+        return 1;
+
+      if (s_len - len != 3)
+        return 1;
+    }
+
+  for (i = 0; i < len; i++)
+    if (!ISDIGIT (s[i]))
+      return 1;
+
+  len /= 2;
+  for (i = 0; i < len; i++)
+    pair[i] = 10 * (s[2*i] - '0') + s[2*i + 1] - '0';
+
+  p = pair;
+  if (syntax_bits & PDS_LEADING_YEAR)
+    {
+      if (year (tm, p, len - 4, syntax_bits))
+        return 1;
+      p += len - 4;
+      len = 4;
+    }
+
+  /* Handle 8 digits worth of `MMDDhhmm'.  */
+  tm->tm_mon = *p++ - 1;
+  tm->tm_mday = *p++;
+  tm->tm_hour = *p++;
+  tm->tm_min = *p++;
+  len -= 4;
+
+  /* Handle any trailing year.  */
+  if (syntax_bits & PDS_TRAILING_YEAR)
+    {
+      if (year (tm, p, len, syntax_bits))
+        return 1;
+    }
+
+  /* Handle seconds.  */
+  if (!dot)
+    {
+      tm->tm_sec = 0;
+    }
+  else
+    {
+      int seconds;
+
+      ++dot;
+      if (!ISDIGIT (dot[0]) || !ISDIGIT (dot[1]))
+        return 1;
+      seconds = 10 * (dot[0] - '0') + dot[1] - '0';
+
+      tm->tm_sec = seconds;
+    }
+
+  return 0;
+}
+
+/* Parse a POSIX-style date, returning true if successful.  */
+
+bool
+posixtime (time_t *p, const char *s, unsigned int syntax_bits)
+{
+  struct tm tm0;
+  struct tm tm1;
+  struct tm const *tm;
+  time_t t;
+
+  if (posix_time_parse (&tm0, s, syntax_bits))
+    return false;
+
+  tm1 = tm0;
+  tm1.tm_isdst = -1;
+  t = mktime (&tm1);
+
+  if (t != (time_t) -1)
+    tm = &tm1;
+  else
+    {
+      /* mktime returns -1 for errors, but -1 is also a valid time_t
+         value.  Check whether an error really occurred.  */
+      tm = localtime (&t);
+      if (! tm)
+        return false;
+    }
+
+  /* Reject dates like "September 31" and times like "25:61".
+     Do not reject times that specify "60" as the number of seconds.  */
+  if ((tm0.tm_year ^ tm->tm_year)
+      | (tm0.tm_mon ^ tm->tm_mon)
+      | (tm0.tm_mday ^ tm->tm_mday)
+      | (tm0.tm_hour ^ tm->tm_hour)
+      | (tm0.tm_min ^ tm->tm_min)
+      | (tm0.tm_sec ^ tm->tm_sec))
+    {
+      /* Any mismatch without 60 in the tm_sec field is invalid.  */
+      if (tm0.tm_sec != 60)
+        return false;
+
+      {
+        /* Allow times like 01:35:60 or 23:59:60.  */
+        time_t dummy;
+        char buf[16];
+        char *b = stpcpy (buf, s);
+        strcpy (b - 2, "59");
+        if (!posixtime (&dummy, buf, syntax_bits))
+          return false;
+      }
+    }
+
+  *p = t;
+  return true;
+}