+++ /dev/null
-%{
-/* Parse a string into an internal time stamp.
- Copyright (C) 1999, 2000, 2002, 2003 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>
-#endif
-
-#include <alloca.h>
-
-/* 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 "getdate.h"
-#include "unlocked-io.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 }
-};
-
-\f
-
-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 */
-}
-
-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 */
projects / chaz / tar / blobdiff