sync 3.0 into HEAD for the last time

(This used to be commit c17a7dc9a190156a069da3e861c18fd3f81224ad)

1 files changed, 1115 insertions, 0 deletions

diff --git a/source3/modules/getdate.y b/source3/modules/getdate.y
new file mode 100644
index 0000000000..aab37f4d23
--- /dev/null
+++ b/source3/modules/getdate.y
@@ -0,0 +1,1115 @@
+%{
+/* Parse a string into an internal time stamp.
+   Copyright (C) 1999, 2000, 2002 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 2, 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, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* Originally written by Steven M. Bellovin <smb@research.att.com> while
+   at the University of North Carolina at Chapel Hill.  Later tweaked by
+   a couple of people on Usenet.  Completely overhauled by Rich $alz
+   <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990.
+
+   Modified by Paul Eggert <eggert@twinsun.com> in August 1999 to do
+   the right thing about local DST.  Unlike previous versions, this
+   version is reentrant.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+# ifdef HAVE_ALLOCA_H
+#  include <alloca.h>
+# endif
+#endif
+
+/* Since the code of getdate.y is not included in the Emacs executable
+   itself, there is no need to #define static in this file.  Even if
+   the code were included in the Emacs executable, it probably
+   wouldn't do any harm to #undef it here; this will only cause
+   problems if we try to write to a static variable, which I don't
+   think this code needs to do.  */
+#ifdef emacs
+# undef static
+#endif
+
+#include <ctype.h>
+
+#if HAVE_STDLIB_H
+# include <stdlib.h> /* for `free'; used by Bison 1.27 */
+#endif
+
+#if STDC_HEADERS || (! defined isascii && ! HAVE_ISASCII)
+# define IN_CTYPE_DOMAIN(c) 1
+#else
+# define IN_CTYPE_DOMAIN(c) isascii (c)
+#endif
+
+#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
+#define ISALPHA(c) (IN_CTYPE_DOMAIN (c) && isalpha (c))
+#define ISLOWER(c) (IN_CTYPE_DOMAIN (c) && islower (c))
+#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
+
+/* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
+   - Its arg may be any int or unsigned int; it need not be an unsigned char.
+   - It's guaranteed to evaluate its argument exactly once.
+   - It's typically faster.
+   POSIX says that only '0' through '9' are digits.  Prefer ISDIGIT to
+   ISDIGIT_LOCALE 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) (c) - '0' <= 9)
+
+#if STDC_HEADERS || HAVE_STRING_H
+# include <string.h>
+#endif
+
+#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
+# define __attribute__(x)
+#endif
+
+#ifndef ATTRIBUTE_UNUSED
+# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#endif
+
+#define EPOCH_YEAR 1970
+#define TM_YEAR_BASE 1900
+
+#define HOUR(x) ((x) * 60)
+
+/* An integer value, and the number of digits in its textual
+   representation.  */
+typedef struct
+{
+  int value;
+  int digits;
+} textint;
+
+/* An entry in the lexical lookup table.  */
+typedef struct
+{
+  char const *name;
+  int type;
+  int value;
+} table;
+
+/* Meridian: am, pm, or 24-hour style.  */
+enum { MERam, MERpm, MER24 };
+
+/* Information passed to and from the parser.  */
+typedef struct
+{
+  /* The input string remaining to be parsed. */
+  const char *input;
+
+  /* N, if this is the Nth Tuesday.  */
+  int day_ordinal;
+
+  /* Day of week; Sunday is 0.  */
+  int day_number;
+
+  /* tm_isdst flag for the local zone.  */
+  int local_isdst;
+
+  /* Time zone, in minutes east of UTC.  */
+  int time_zone;
+
+  /* Style used for time.  */
+  int meridian;
+
+  /* Gregorian year, month, day, hour, minutes, and seconds.  */
+  textint year;
+  int month;
+  int day;
+  int hour;
+  int minutes;
+  int seconds;
+
+  /* Relative year, month, day, hour, minutes, and seconds.  */
+  int rel_year;
+  int rel_month;
+  int rel_day;
+  int rel_hour;
+  int rel_minutes;
+  int rel_seconds;
+
+  /* Counts of nonterminals of various flavors parsed so far.  */
+  int dates_seen;
+  int days_seen;
+  int local_zones_seen;
+  int rels_seen;
+  int times_seen;
+  int zones_seen;
+
+  /* Table of local time zone abbrevations, terminated by a null entry.  */
+  table local_time_zone_table[3];
+} parser_control;
+
+#define PC (* (parser_control *) parm)
+#define YYLEX_PARAM parm
+#define YYPARSE_PARAM parm
+
+static int yyerror ();
+static int yylex ();
+
+%}
+
+/* We want a reentrant parser.  */
+%pure_parser
+
+/* This grammar has 13 shift/reduce conflicts. */
+%expect 13
+
+%union
+{
+  int intval;
+  textint textintval;
+}
+
+%token tAGO tDST
+
+%token <intval> tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tLOCAL_ZONE tMERIDIAN
+%token <intval> tMINUTE_UNIT tMONTH tMONTH_UNIT tSEC_UNIT tYEAR_UNIT tZONE
+
+%token <textintval> tSNUMBER tUNUMBER
+
+%type <intval> o_merid
+
+%%
+
+spec:
+    /* empty */
+  | spec item
+  ;
+
+item:
+    time
+      { PC.times_seen++; }
+  | local_zone
+      { PC.local_zones_seen++; }
+  | zone
+      { PC.zones_seen++; }
+  | date
+      { PC.dates_seen++; }
+  | day
+      { PC.days_seen++; }
+  | rel
+      { PC.rels_seen++; }
+  | number
+  ;
+
+time:
+    tUNUMBER tMERIDIAN
+      {
+	PC.hour = $1.value;
+	PC.minutes = 0;
+	PC.seconds = 0;
+	PC.meridian = $2;
+      }
+  | tUNUMBER ':' tUNUMBER o_merid
+      {
+	PC.hour = $1.value;
+	PC.minutes = $3.value;
+	PC.seconds = 0;
+	PC.meridian = $4;
+      }
+  | tUNUMBER ':' tUNUMBER tSNUMBER
+      {
+	PC.hour = $1.value;
+	PC.minutes = $3.value;
+	PC.meridian = MER24;
+	PC.zones_seen++;
+	PC.time_zone = $4.value % 100 + ($4.value / 100) * 60;
+      }
+  | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid
+      {
+	PC.hour = $1.value;
+	PC.minutes = $3.value;
+	PC.seconds = $5.value;
+	PC.meridian = $6;
+      }
+  | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER
+      {
+	PC.hour = $1.value;
+	PC.minutes = $3.value;
+	PC.seconds = $5.value;
+	PC.meridian = MER24;
+	PC.zones_seen++;
+	PC.time_zone = $6.value % 100 + ($6.value / 100) * 60;
+      }
+  ;
+
+local_zone:
+    tLOCAL_ZONE
+      { PC.local_isdst = $1; }
+  | tLOCAL_ZONE tDST
+      { PC.local_isdst = $1 < 0 ? 1 : $1 + 1; }
+  ;
+
+zone:
+    tZONE
+      { PC.time_zone = $1; }
+  | tDAYZONE
+      { PC.time_zone = $1 + 60; }
+  | tZONE tDST
+      { PC.time_zone = $1 + 60; }
+  ;
+
+day:
+    tDAY
+      {
+	PC.day_ordinal = 1;
+	PC.day_number = $1;
+      }
+  | tDAY ','
+      {
+	PC.day_ordinal = 1;
+	PC.day_number = $1;
+      }
+  | tUNUMBER tDAY
+      {
+	PC.day_ordinal = $1.value;
+	PC.day_number = $2;
+      }
+  ;
+
+date:
+    tUNUMBER '/' tUNUMBER
+      {
+	PC.month = $1.value;
+	PC.day = $3.value;
+      }
+  | tUNUMBER '/' tUNUMBER '/' tUNUMBER
+      {
+	/* Interpret as YYYY/MM/DD if the first value has 4 or more digits,
+	   otherwise as MM/DD/YY.
+	   The goal in recognizing YYYY/MM/DD is solely to support legacy
+	   machine-generated dates like those in an RCS log listing.  If
+	   you want portability, use the ISO 8601 format.  */
+	if (4 <= $1.digits)
+	  {
+	    PC.year = $1;
+	    PC.month = $3.value;
+	    PC.day = $5.value;
+	  }
+	else
+	  {
+	    PC.month = $1.value;
+	    PC.day = $3.value;
+	    PC.year = $5;
+	  }
+      }
+  | tUNUMBER tSNUMBER tSNUMBER
+      {
+	/* ISO 8601 format.  YYYY-MM-DD.  */
+	PC.year = $1;
+	PC.month = -$2.value;
+	PC.day = -$3.value;
+      }
+  | tUNUMBER tMONTH tSNUMBER
+      {
+	/* e.g. 17-JUN-1992.  */
+	PC.day = $1.value;
+	PC.month = $2;
+	PC.year.value = -$3.value;
+	PC.year.digits = $3.digits;
+      }
+  | tMONTH tUNUMBER
+      {
+	PC.month = $1;
+	PC.day = $2.value;
+      }
+  | tMONTH tUNUMBER ',' tUNUMBER
+      {
+	PC.month = $1;
+	PC.day = $2.value;
+	PC.year = $4;
+      }
+  | tUNUMBER tMONTH
+      {
+	PC.day = $1.value;
+	PC.month = $2;
+      }
+  | tUNUMBER tMONTH tUNUMBER
+      {
+	PC.day = $1.value;
+	PC.month = $2;
+	PC.year = $3;
+      }
+  ;
+
+rel:
+    relunit tAGO
+      {
+	PC.rel_seconds = -PC.rel_seconds;
+	PC.rel_minutes = -PC.rel_minutes;
+	PC.rel_hour = -PC.rel_hour;
+	PC.rel_day = -PC.rel_day;
+	PC.rel_month = -PC.rel_month;
+	PC.rel_year = -PC.rel_year;
+      }
+  | relunit
+  ;
+
+relunit:
+    tUNUMBER tYEAR_UNIT
+      { PC.rel_year += $1.value * $2; }
+  | tSNUMBER tYEAR_UNIT
+      { PC.rel_year += $1.value * $2; }
+  | tYEAR_UNIT
+      { PC.rel_year += $1; }
+  | tUNUMBER tMONTH_UNIT
+      { PC.rel_month += $1.value * $2; }
+  | tSNUMBER tMONTH_UNIT
+      { PC.rel_month += $1.value * $2; }
+  | tMONTH_UNIT
+      { PC.rel_month += $1; }
+  | tUNUMBER tDAY_UNIT
+      { PC.rel_day += $1.value * $2; }
+  | tSNUMBER tDAY_UNIT
+      { PC.rel_day += $1.value * $2; }
+  | tDAY_UNIT
+      { PC.rel_day += $1; }
+  | tUNUMBER tHOUR_UNIT
+      { PC.rel_hour += $1.value * $2; }
+  | tSNUMBER tHOUR_UNIT
+      { PC.rel_hour += $1.value * $2; }
+  | tHOUR_UNIT
+      { PC.rel_hour += $1; }
+  | tUNUMBER tMINUTE_UNIT
+      { PC.rel_minutes += $1.value * $2; }
+  | tSNUMBER tMINUTE_UNIT
+      { PC.rel_minutes += $1.value * $2; }
+  | tMINUTE_UNIT
+      { PC.rel_minutes += $1; }
+  | tUNUMBER tSEC_UNIT
+      { PC.rel_seconds += $1.value * $2; }
+  | tSNUMBER tSEC_UNIT
+      { PC.rel_seconds += $1.value * $2; }
+  | tSEC_UNIT
+      { PC.rel_seconds += $1; }
+  ;
+
+number:
+    tUNUMBER
+      {
+	if (PC.dates_seen
+	    && ! PC.rels_seen && (PC.times_seen || 2 < $1.digits))
+	  PC.year = $1;
+	else
+	  {
+	    if (4 < $1.digits)
+	      {
+		PC.dates_seen++;
+		PC.day = $1.value % 100;
+		PC.month = ($1.value / 100) % 100;
+		PC.year.value = $1.value / 10000;
+		PC.year.digits = $1.digits - 4;
+	      }
+	    else
+	      {
+		PC.times_seen++;
+		if ($1.digits <= 2)
+		  {
+		    PC.hour = $1.value;
+		    PC.minutes = 0;
+		  }
+		else
+		  {
+		    PC.hour = $1.value / 100;
+		    PC.minutes = $1.value % 100;
+		  }
+		PC.seconds = 0;
+		PC.meridian = MER24;
+	      }
+	  }
+      }
+  ;
+
+o_merid:
+    /* empty */
+      { $$ = MER24; }
+  | tMERIDIAN
+      { $$ = $1; }
+  ;
+
+%%
+
+/* Include this file down here because bison inserts code above which
+   may define-away `const'.  We want the prototype for get_date to have
+   the same signature as the function definition.  */
+#include "modules/getdate.h"
+
+#ifndef gmtime
+struct tm *gmtime ();
+#endif
+#ifndef localtime
+struct tm *localtime ();
+#endif
+#ifndef mktime
+time_t mktime ();
+#endif
+
+static table const meridian_table[] =
+{
+  { "AM",   tMERIDIAN, MERam },
+  { "A.M.", tMERIDIAN, MERam },
+  { "PM",   tMERIDIAN, MERpm },
+  { "P.M.", tMERIDIAN, MERpm },
+  { 0, 0, 0 }
+};
+
+static table const dst_table[] =
+{
+  { "DST", tDST, 0 }
+};
+
+static table const month_and_day_table[] =
+{
+  { "JANUARY",	tMONTH,	 1 },
+  { "FEBRUARY",	tMONTH,	 2 },
+  { "MARCH",	tMONTH,	 3 },
+  { "APRIL",	tMONTH,	 4 },
+  { "MAY",	tMONTH,	 5 },
+  { "JUNE",	tMONTH,	 6 },
+  { "JULY",	tMONTH,	 7 },
+  { "AUGUST",	tMONTH,	 8 },
+  { "SEPTEMBER",tMONTH,	 9 },
+  { "SEPT",	tMONTH,	 9 },
+  { "OCTOBER",	tMONTH,	10 },
+  { "NOVEMBER",	tMONTH,	11 },
+  { "DECEMBER",	tMONTH,	12 },
+  { "SUNDAY",	tDAY,	 0 },
+  { "MONDAY",	tDAY,	 1 },
+  { "TUESDAY",	tDAY,	 2 },
+  { "TUES",	tDAY,	 2 },
+  { "WEDNESDAY",tDAY,	 3 },
+  { "WEDNES",	tDAY,	 3 },
+  { "THURSDAY",	tDAY,	 4 },
+  { "THUR",	tDAY,	 4 },
+  { "THURS",	tDAY,	 4 },
+  { "FRIDAY",	tDAY,	 5 },
+  { "SATURDAY",	tDAY,	 6 },
+  { 0, 0, 0 }
+};
+
+static table const time_units_table[] =
+{
+  { "YEAR",	tYEAR_UNIT,	 1 },
+  { "MONTH",	tMONTH_UNIT,	 1 },
+  { "FORTNIGHT",tDAY_UNIT,	14 },
+  { "WEEK",	tDAY_UNIT,	 7 },
+  { "DAY",	tDAY_UNIT,	 1 },
+  { "HOUR",	tHOUR_UNIT,	 1 },
+  { "MINUTE",	tMINUTE_UNIT,	 1 },
+  { "MIN",	tMINUTE_UNIT,	 1 },
+  { "SECOND",	tSEC_UNIT,	 1 },
+  { "SEC",	tSEC_UNIT,	 1 },
+  { 0, 0, 0 }
+};
+
+/* Assorted relative-time words. */
+static table const relative_time_table[] =
+{
+  { "TOMORROW",	tMINUTE_UNIT,	24 * 60 },
+  { "YESTERDAY",tMINUTE_UNIT,	- (24 * 60) },
+  { "TODAY",	tMINUTE_UNIT,	 0 },
+  { "NOW",	tMINUTE_UNIT,	 0 },
+  { "LAST",	tUNUMBER,	-1 },
+  { "THIS",	tUNUMBER,	 0 },
+  { "NEXT",	tUNUMBER,	 1 },
+  { "FIRST",	tUNUMBER,	 1 },
+/*{ "SECOND",	tUNUMBER,	 2 }, */
+  { "THIRD",	tUNUMBER,	 3 },
+  { "FOURTH",	tUNUMBER,	 4 },
+  { "FIFTH",	tUNUMBER,	 5 },
+  { "SIXTH",	tUNUMBER,	 6 },
+  { "SEVENTH",	tUNUMBER,	 7 },
+  { "EIGHTH",	tUNUMBER,	 8 },
+  { "NINTH",	tUNUMBER,	 9 },
+  { "TENTH",	tUNUMBER,	10 },
+  { "ELEVENTH",	tUNUMBER,	11 },
+  { "TWELFTH",	tUNUMBER,	12 },
+  { "AGO",	tAGO,		 1 },
+  { 0, 0, 0 }
+};
+
+/* The time zone table.  This table is necessarily incomplete, as time
+   zone abbreviations are ambiguous; e.g. Australians interpret "EST"
+   as Eastern time in Australia, not as US Eastern Standard Time.
+   You cannot rely on getdate to handle arbitrary time zone
+   abbreviations; use numeric abbreviations like `-0500' instead.  */
+static table const time_zone_table[] =
+{
+  { "GMT",	tZONE,     HOUR ( 0) },	/* Greenwich Mean */
+  { "UT",	tZONE,     HOUR ( 0) },	/* Universal (Coordinated) */
+  { "UTC",	tZONE,     HOUR ( 0) },
+  { "WET",	tZONE,     HOUR ( 0) },	/* Western European */
+  { "WEST",	tDAYZONE,  HOUR ( 0) },	/* Western European Summer */
+  { "BST",	tDAYZONE,  HOUR ( 0) },	/* British Summer */
+  { "ART",	tZONE,	  -HOUR ( 3) },	/* Argentina */
+  { "BRT",	tZONE,	  -HOUR ( 3) },	/* Brazil */
+  { "BRST",	tDAYZONE, -HOUR ( 3) },	/* Brazil Summer */
+  { "NST",	tZONE,	 -(HOUR ( 3) + 30) },	/* Newfoundland Standard */
+  { "NDT",	tDAYZONE,-(HOUR ( 3) + 30) },	/* Newfoundland Daylight */
+  { "AST",	tZONE,    -HOUR ( 4) },	/* Atlantic Standard */
+  { "ADT",	tDAYZONE, -HOUR ( 4) },	/* Atlantic Daylight */
+  { "CLT",	tZONE,    -HOUR ( 4) },	/* Chile */
+  { "CLST",	tDAYZONE, -HOUR ( 4) },	/* Chile Summer */
+  { "EST",	tZONE,    -HOUR ( 5) },	/* Eastern Standard */
+  { "EDT",	tDAYZONE, -HOUR ( 5) },	/* Eastern Daylight */
+  { "CST",	tZONE,    -HOUR ( 6) },	/* Central Standard */
+  { "CDT",	tDAYZONE, -HOUR ( 6) },	/* Central Daylight */
+  { "MST",	tZONE,    -HOUR ( 7) },	/* Mountain Standard */
+  { "MDT",	tDAYZONE, -HOUR ( 7) },	/* Mountain Daylight */
+  { "PST",	tZONE,    -HOUR ( 8) },	/* Pacific Standard */
+  { "PDT",	tDAYZONE, -HOUR ( 8) },	/* Pacific Daylight */
+  { "AKST",	tZONE,    -HOUR ( 9) },	/* Alaska Standard */
+  { "AKDT",	tDAYZONE, -HOUR ( 9) },	/* Alaska Daylight */
+  { "HST",	tZONE,    -HOUR (10) },	/* Hawaii Standard */
+  { "HAST",	tZONE,	  -HOUR (10) },	/* Hawaii-Aleutian Standard */
+  { "HADT",	tDAYZONE, -HOUR (10) },	/* Hawaii-Aleutian Daylight */
+  { "SST",	tZONE,    -HOUR (12) },	/* Samoa Standard */
+  { "WAT",	tZONE,     HOUR ( 1) },	/* West Africa */
+  { "CET",	tZONE,     HOUR ( 1) },	/* Central European */
+  { "CEST",	tDAYZONE,  HOUR ( 1) },	/* Central European Summer */
+  { "MET",	tZONE,     HOUR ( 1) },	/* Middle European */
+  { "MEZ",	tZONE,     HOUR ( 1) },	/* Middle European */
+  { "MEST",	tDAYZONE,  HOUR ( 1) },	/* Middle European Summer */
+  { "MESZ",	tDAYZONE,  HOUR ( 1) },	/* Middle European Summer */
+  { "EET",	tZONE,     HOUR ( 2) },	/* Eastern European */
+  { "EEST",	tDAYZONE,  HOUR ( 2) },	/* Eastern European Summer */
+  { "CAT",	tZONE,	   HOUR ( 2) },	/* Central Africa */
+  { "SAST",	tZONE,	   HOUR ( 2) },	/* South Africa Standard */
+  { "EAT",	tZONE,	   HOUR ( 3) },	/* East Africa */
+  { "MSK",	tZONE,	   HOUR ( 3) },	/* Moscow */
+  { "MSD",	tDAYZONE,  HOUR ( 3) },	/* Moscow Daylight */
+  { "IST",	tZONE,	  (HOUR ( 5) + 30) },	/* India Standard */
+  { "SGT",	tZONE,     HOUR ( 8) },	/* Singapore */
+  { "KST",	tZONE,     HOUR ( 9) },	/* Korea Standard */
+  { "JST",	tZONE,     HOUR ( 9) },	/* Japan Standard */
+  { "GST",	tZONE,     HOUR (10) },	/* Guam Standard */
+  { "NZST",	tZONE,     HOUR (12) },	/* New Zealand Standard */
+  { "NZDT",	tDAYZONE,  HOUR (12) },	/* New Zealand Daylight */
+  { 0, 0, 0  }
+};
+
+/* Military time zone table. */
+static table const military_table[] =
+{
+  { "A", tZONE,	-HOUR ( 1) },
+  { "B", tZONE,	-HOUR ( 2) },
+  { "C", tZONE,	-HOUR ( 3) },
+  { "D", tZONE,	-HOUR ( 4) },
+  { "E", tZONE,	-HOUR ( 5) },
+  { "F", tZONE,	-HOUR ( 6) },
+  { "G", tZONE,	-HOUR ( 7) },
+  { "H", tZONE,	-HOUR ( 8) },
+  { "I", tZONE,	-HOUR ( 9) },
+  { "K", tZONE,	-HOUR (10) },
+  { "L", tZONE,	-HOUR (11) },
+  { "M", tZONE,	-HOUR (12) },
+  { "N", tZONE,	 HOUR ( 1) },
+  { "O", tZONE,	 HOUR ( 2) },
+  { "P", tZONE,	 HOUR ( 3) },
+  { "Q", tZONE,	 HOUR ( 4) },
+  { "R", tZONE,	 HOUR ( 5) },
+  { "S", tZONE,	 HOUR ( 6) },
+  { "T", tZONE,	 HOUR ( 7) },
+  { "U", tZONE,	 HOUR ( 8) },
+  { "V", tZONE,	 HOUR ( 9) },
+  { "W", tZONE,	 HOUR (10) },
+  { "X", tZONE,	 HOUR (11) },
+  { "Y", tZONE,	 HOUR (12) },
+  { "Z", tZONE,	 HOUR ( 0) },
+  { 0, 0, 0 }
+};
+
+
+
+static int
+to_hour (int hours, int meridian)
+{
+  switch (meridian)
+    {
+    case MER24:
+      return 0 <= hours && hours < 24 ? hours : -1;
+    case MERam:
+      return 0 < hours && hours < 12 ? hours : hours == 12 ? 0 : -1;
+    case MERpm:
+      return 0 < hours && hours < 12 ? hours + 12 : hours == 12 ? 12 : -1;
+    default:
+      abort ();
+    }
+  /* NOTREACHED */
+    return 0;
+}
+
+static int
+to_year (textint textyear)
+{
+  int year = textyear.value;
+
+  if (year < 0)
+    year = -year;
+
+  /* XPG4 suggests that years 00-68 map to 2000-2068, and
+     years 69-99 map to 1969-1999.  */
+  if (textyear.digits == 2)
+    year += year < 69 ? 2000 : 1900;
+
+  return year;
+}
+
+static table const *
+lookup_zone (parser_control const *pc, char const *name)
+{
+  table const *tp;
+
+  /* Try local zone abbreviations first; they're more likely to be right.  */
+  for (tp = pc->local_time_zone_table; tp->name; tp++)
+    if (strcmp (name, tp->name) == 0)
+      return tp;
+
+  for (tp = time_zone_table; tp->name; tp++)
+    if (strcmp (name, tp->name) == 0)
+      return tp;
+
+  return 0;
+}
+
+#if ! HAVE_TM_GMTOFF
+/* Yield the difference between *A and *B,
+   measured in seconds, ignoring leap seconds.
+   The body of this function is taken directly from the GNU C Library;
+   see src/strftime.c.  */
+static int
+tm_diff (struct tm const *a, struct tm const *b)
+{
+  /* Compute intervening leap days correctly even if year is negative.
+     Take care to avoid int overflow in leap day calculations,
+     but it's OK to assume that A and B are close to each other.  */
+  int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3);
+  int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3);
+  int a100 = a4 / 25 - (a4 % 25 < 0);
+  int b100 = b4 / 25 - (b4 % 25 < 0);
+  int a400 = a100 >> 2;
+  int b400 = b100 >> 2;
+  int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
+  int years = a->tm_year - b->tm_year;
+  int days = (365 * years + intervening_leap_days
+	      + (a->tm_yday - b->tm_yday));
+  return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
+		+ (a->tm_min - b->tm_min))
+	  + (a->tm_sec - b->tm_sec));
+}
+#endif /* ! HAVE_TM_GMTOFF */
+
+static table const *
+lookup_word (parser_control const *pc, char *word)
+{
+  char *p;
+  char *q;
+  size_t wordlen;
+  table const *tp;
+  int i;
+  int abbrev;
+
+  /* Make it uppercase.  */
+  for (p = word; *p; p++)
+    if (ISLOWER ((unsigned char) *p))
+      *p = toupper ((unsigned char) *p);
+
+  for (tp = meridian_table; tp->name; tp++)
+    if (strcmp (word, tp->name) == 0)
+      return tp;
+
+  /* See if we have an abbreviation for a month. */
+  wordlen = strlen (word);
+  abbrev = wordlen == 3 || (wordlen == 4 && word[3] == '.');
+
+  for (tp = month_and_day_table; tp->name; tp++)
+    if ((abbrev ? strncmp (word, tp->name, 3) : strcmp (word, tp->name)) == 0)
+      return tp;
+
+  if ((tp = lookup_zone (pc, word)))
+    return tp;
+
+  if (strcmp (word, dst_table[0].name) == 0)
+    return dst_table;
+
+  for (tp = time_units_table; tp->name; tp++)
+    if (strcmp (word, tp->name) == 0)
+      return tp;
+
+  /* Strip off any plural and try the units table again. */
+  if (word[wordlen - 1] == 'S')
+    {
+      word[wordlen - 1] = '\0';
+      for (tp = time_units_table; tp->name; tp++)
+	if (strcmp (word, tp->name) == 0)
+	  return tp;
+      word[wordlen - 1] = 'S';	/* For "this" in relative_time_table.  */
+    }
+
+  for (tp = relative_time_table; tp->name; tp++)
+    if (strcmp (word, tp->name) == 0)
+      return tp;
+
+  /* Military time zones. */
+  if (wordlen == 1)
+    for (tp = military_table; tp->name; tp++)
+      if (word[0] == tp->name[0])
+	return tp;
+
+  /* Drop out any periods and try the time zone table again. */
+  for (i = 0, p = q = word; (*p = *q); q++)
+    if (*q == '.')
+      i = 1;
+    else
+      p++;
+  if (i && (tp = lookup_zone (pc, word)))
+    return tp;
+
+  return 0;
+}
+
+static int
+yylex (YYSTYPE *lvalp, parser_control *pc)
+{
+  unsigned char c;
+  int count;
+
+  for (;;)
+    {
+      while (c = *pc->input, ISSPACE (c))
+	pc->input++;
+
+      if (ISDIGIT (c) || c == '-' || c == '+')
+	{
+	  char const *p;
+	  int sign;
+	  int value;
+	  if (c == '-' || c == '+')
+	    {
+	      sign = c == '-' ? -1 : 1;
+	      c = *++pc->input;
+	      if (! ISDIGIT (c))
+		/* skip the '-' sign */
+		continue;
+	    }
+	  else
+	    sign = 0;
+	  p = pc->input;
+	  value = 0;
+	  do
+	    {
+	      value = 10 * value + c - '0';
+	      c = *++p;
+	    }
+	  while (ISDIGIT (c));
+	  lvalp->textintval.value = sign < 0 ? -value : value;
+	  lvalp->textintval.digits = p - pc->input;
+	  pc->input = p;
+	  return sign ? tSNUMBER : tUNUMBER;
+	}
+
+      if (ISALPHA (c))
+	{
+	  char buff[20];
+	  char *p = buff;
+	  table const *tp;
+
+	  do
+	    {
+	      if (p < buff + sizeof buff - 1)
+		*p++ = c;
+	      c = *++pc->input;
+	    }
+	  while (ISALPHA (c) || c == '.');
+
+	  *p = '\0';
+	  tp = lookup_word (pc, buff);
+	  if (! tp)
+	    return '?';
+	  lvalp->intval = tp->value;
+	  return tp->type;
+	}
+
+      if (c != '(')
+	return *pc->input++;
+      count = 0;
+      do
+	{
+	  c = *pc->input++;
+	  if (c == '\0')
+	    return c;
+	  if (c == '(')
+	    count++;
+	  else if (c == ')')
+	    count--;
+	}
+      while (count > 0);
+    }
+}
+
+/* Do nothing if the parser reports an error.  */
+static int
+yyerror (char *s ATTRIBUTE_UNUSED)
+{
+  return 0;
+}
+
+/* Parse a date/time string P.  Return the corresponding time_t value,
+   or (time_t) -1 if there is an error.  P can be an incomplete or
+   relative time specification; if so, use *NOW as the basis for the
+   returned time.  */
+time_t
+get_date (const char *p, const time_t *now)
+{
+  time_t Start = now ? *now : time (0);
+  struct tm *tmp = localtime (&Start);
+  struct tm tm;
+  struct tm tm0;
+  parser_control pc;
+
+  if (! tmp)
+    return -1;
+
+  pc.input = p;
+  pc.year.value = tmp->tm_year + TM_YEAR_BASE;
+  pc.year.digits = 4;
+  pc.month = tmp->tm_mon + 1;
+  pc.day = tmp->tm_mday;
+  pc.hour = tmp->tm_hour;
+  pc.minutes = tmp->tm_min;
+  pc.seconds = tmp->tm_sec;
+  tm.tm_isdst = tmp->tm_isdst;
+
+  pc.meridian = MER24;
+  pc.rel_seconds = 0;
+  pc.rel_minutes = 0;
+  pc.rel_hour = 0;
+  pc.rel_day = 0;
+  pc.rel_month = 0;
+  pc.rel_year = 0;
+  pc.dates_seen = 0;
+  pc.days_seen = 0;
+  pc.rels_seen = 0;
+  pc.times_seen = 0;
+  pc.local_zones_seen = 0;
+  pc.zones_seen = 0;
+
+#if HAVE_STRUCT_TM_TM_ZONE
+  pc.local_time_zone_table[0].name = tmp->tm_zone;
+  pc.local_time_zone_table[0].type = tLOCAL_ZONE;
+  pc.local_time_zone_table[0].value = tmp->tm_isdst;
+  pc.local_time_zone_table[1].name = 0;
+
+  /* Probe the names used in the next three calendar quarters, looking
+     for a tm_isdst different from the one we already have.  */
+  {
+    int quarter;
+    for (quarter = 1; quarter <= 3; quarter++)
+      {
+	time_t probe = Start + quarter * (90 * 24 * 60 * 60);
+	struct tm *probe_tm = localtime (&probe);
+	if (probe_tm && probe_tm->tm_zone
+	    && probe_tm->tm_isdst != pc.local_time_zone_table[0].value)
+	  {
+	      {
+		pc.local_time_zone_table[1].name = probe_tm->tm_zone;
+		pc.local_time_zone_table[1].type = tLOCAL_ZONE;
+		pc.local_time_zone_table[1].value = probe_tm->tm_isdst;
+		pc.local_time_zone_table[2].name = 0;
+	      }
+	    break;
+	  }
+      }
+  }
+#else
+#if HAVE_TZNAME
+  {
+# ifndef tzname
+    extern char *tzname[];
+# endif
+    int i;
+    for (i = 0; i < 2; i++)
+      {
+	pc.local_time_zone_table[i].name = tzname[i];
+	pc.local_time_zone_table[i].type = tLOCAL_ZONE;
+	pc.local_time_zone_table[i].value = i;
+      }
+    pc.local_time_zone_table[i].name = 0;
+  }
+#else
+  pc.local_time_zone_table[0].name = 0;
+#endif
+#endif
+
+  if (pc.local_time_zone_table[0].name && pc.local_time_zone_table[1].name
+      && ! strcmp (pc.local_time_zone_table[0].name,
+		   pc.local_time_zone_table[1].name))
+    {
+      /* This locale uses the same abbrevation for standard and
+	 daylight times.  So if we see that abbreviation, we don't
+	 know whether it's daylight time.  */
+      pc.local_time_zone_table[0].value = -1;
+      pc.local_time_zone_table[1].name = 0;
+    }
+
+  if (yyparse (&pc) != 0
+      || 1 < pc.times_seen || 1 < pc.dates_seen || 1 < pc.days_seen
+      || 1 < (pc.local_zones_seen + pc.zones_seen)
+      || (pc.local_zones_seen && 1 < pc.local_isdst))
+    return -1;
+
+  tm.tm_year = to_year (pc.year) - TM_YEAR_BASE + pc.rel_year;
+  tm.tm_mon = pc.month - 1 + pc.rel_month;
+  tm.tm_mday = pc.day + pc.rel_day;
+  if (pc.times_seen || (pc.rels_seen && ! pc.dates_seen && ! pc.days_seen))
+    {
+      tm.tm_hour = to_hour (pc.hour, pc.meridian);
+      if (tm.tm_hour < 0)
+	return -1;
+      tm.tm_min = pc.minutes;
+      tm.tm_sec = pc.seconds;
+    }
+  else
+    {
+      tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
+    }
+
+  /* Let mktime deduce tm_isdst if we have an absolute time stamp,
+     or if the relative time stamp mentions days, months, or years.  */
+  if (pc.dates_seen | pc.days_seen | pc.times_seen | pc.rel_day
+      | pc.rel_month | pc.rel_year)
+    tm.tm_isdst = -1;
+
+  /* But if the input explicitly specifies local time with or without
+     DST, give mktime that information.  */
+  if (pc.local_zones_seen)
+    tm.tm_isdst = pc.local_isdst;
+
+  tm0 = tm;
+
+  Start = mktime (&tm);
+
+  if (Start == (time_t) -1)
+    {
+
+      /* Guard against falsely reporting errors near the time_t boundaries
+         when parsing times in other time zones.  For example, if the min
+         time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead
+         of UTC, then the min localtime value is 1970-01-01 08:00:00; if
+         we apply mktime to 1970-01-01 00:00:00 we will get an error, so
+         we apply mktime to 1970-01-02 08:00:00 instead and adjust the time
+         zone by 24 hours to compensate.  This algorithm assumes that
+         there is no DST transition within a day of the time_t boundaries.  */
+      if (pc.zones_seen)
+	{
+	  tm = tm0;
+	  if (tm.tm_year <= EPOCH_YEAR - TM_YEAR_BASE)
+	    {
+	      tm.tm_mday++;
+	      pc.time_zone += 24 * 60;
+	    }
+	  else
+	    {
+	      tm.tm_mday--;
+	      pc.time_zone -= 24 * 60;
+	    }
+	  Start = mktime (&tm);
+	}
+
+      if (Start == (time_t) -1)
+	return Start;
+    }
+
+  if (pc.days_seen && ! pc.dates_seen)
+    {
+      tm.tm_mday += ((pc.day_number - tm.tm_wday + 7) % 7
+		     + 7 * (pc.day_ordinal - (0 < pc.day_ordinal)));
+      tm.tm_isdst = -1;
+      Start = mktime (&tm);
+      if (Start == (time_t) -1)
+	return Start;
+    }
+
+  if (pc.zones_seen)
+    {
+      int delta = pc.time_zone * 60;
+#ifdef HAVE_TM_GMTOFF
+      delta -= tm.tm_gmtoff;
+#else
+      struct tm *gmt = gmtime (&Start);
+      if (! gmt)
+	return -1;
+      delta -= tm_diff (&tm, gmt);
+#endif
+      if ((Start < Start - delta) != (delta < 0))
+	return -1;	/* time_t overflow */
+      Start -= delta;
+    }
+
+  /* Add relative hours, minutes, and seconds.  Ignore leap seconds;
+     i.e. "+ 10 minutes" means 600 seconds, even if one of them is a
+     leap second.  Typically this is not what the user wants, but it's
+     too hard to do it the other way, because the time zone indicator
+     must be applied before relative times, and if mktime is applied
+     again the time zone will be lost.  */
+  {
+    time_t t0 = Start;
+    long d1 = 60 * 60 * (long) pc.rel_hour;
+    time_t t1 = t0 + d1;
+    long d2 = 60 * (long) pc.rel_minutes;
+    time_t t2 = t1 + d2;
+    int d3 = pc.rel_seconds;
+    time_t t3 = t2 + d3;
+    if ((d1 / (60 * 60) ^ pc.rel_hour)
+	| (d2 / 60 ^ pc.rel_minutes)
+	| ((t0 + d1 < t0) ^ (d1 < 0))
+	| ((t1 + d2 < t1) ^ (d2 < 0))
+	| ((t2 + d3 < t2) ^ (d3 < 0)))
+      return -1;
+    Start = t3;
+  }
+
+  return Start;
+}
+
+#if TEST
+
+#include <stdio.h>
+
+int
+main (int ac, char **av)
+{
+  char buff[BUFSIZ];
+  time_t d;
+
+  printf ("Enter date, or blank line to exit.\n\t> ");
+  fflush (stdout);
+
+  buff[BUFSIZ - 1] = 0;
+  while (fgets (buff, BUFSIZ - 1, stdin) && buff[0])
+    {
+      d = get_date (buff, 0);
+      if (d == (time_t) -1)
+	printf ("Bad format - couldn't convert.\n");
+      else
+	printf ("%s", ctime (&d));
+      printf ("\t> ");
+      fflush (stdout);
+    }
+  return 0;
+}
+#endif /* defined TEST */