+++ /dev/null
-%{
-/* Parse a string into an internal time stamp.
-
- Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
- 2010 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/>. */
-
-/* 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. Also modified by Paul Eggert
- <eggert@cs.ucla.edu> in February 2004 to support
- nanosecond-resolution time stamps, and in October 2004 to support
- TZ strings in dates. */
-
-/* FIXME: Check for arithmetic overflow in all cases, not just
- some of them. */
-
-#include <config.h>
-
-#include "getdate.h"
-
-#include "intprops.h"
-#include "timespec.h"
-#include "verify.h"
-
-/* There's no need to extend the stack, so there's no need to involve
- alloca. */
-#define YYSTACK_USE_ALLOCA 0
-
-/* Tell Bison how much stack space is needed. 20 should be plenty for
- this grammar, which is not right recursive. Beware setting it too
- high, since that might cause problems on machines whose
- implementations have lame stack-overflow checking. */
-#define YYMAXDEPTH 20
-#define YYINITDEPTH YYMAXDEPTH
-
-/* 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 <c-ctype.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "xalloc.h"
-
-
-/* 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)
-
-/* Shift A right by B bits portably, by dividing A by 2**B and
- truncating towards minus infinity. A and B should be free of side
- effects, and B should be in the range 0 <= B <= INT_BITS - 2, where
- INT_BITS is the number of useful bits in an int. GNU code can
- assume that INT_BITS is at least 32.
-
- ISO C99 says that A >> B is implementation-defined if A < 0. Some
- implementations (e.g., UNICOS 9.0 on a Cray Y-MP EL) don't shift
- right in the usual way when A < 0, so SHR falls back on division if
- ordinary A >> B doesn't seem to be the usual signed shift. */
-#define SHR(a, b) \
- (-1 >> 1 == -1 \
- ? (a) >> (b) \
- : (a) / (1 << (b)) - ((a) % (1 << (b)) < 0))
-
-#define EPOCH_YEAR 1970
-#define TM_YEAR_BASE 1900
-
-#define HOUR(x) ((x) * 60)
-
-/* long_time_t is a signed integer type that contains all time_t values. */
-verify (TYPE_IS_INTEGER (time_t));
-#if TIME_T_FITS_IN_LONG_INT
-typedef long int long_time_t;
-#else
-typedef time_t long_time_t;
-#endif
-
-/* Lots of this code assumes time_t and time_t-like values fit into
- long_time_t. */
-verify (TYPE_MINIMUM (long_time_t) <= TYPE_MINIMUM (time_t)
- && TYPE_MAXIMUM (time_t) <= TYPE_MAXIMUM (long_time_t));
-
-/* FIXME: It also assumes that signed integer overflow silently wraps around,
- but this is not true any more with recent versions of GCC 4. */
-
-/* An integer value, and the number of digits in its textual
- representation. */
-typedef struct
-{
- bool negative;
- long int value;
- size_t 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 };
-
-enum { BILLION = 1000000000, LOG10_BILLION = 9 };
-
-/* Relative times. */
-typedef struct
-{
- /* Relative year, month, day, hour, minutes, seconds, and nanoseconds. */
- long int year;
- long int month;
- long int day;
- long int hour;
- long int minutes;
- long_time_t seconds;
- long int ns;
-} relative_time;
-
-#if HAVE_COMPOUND_LITERALS
-# define RELATIVE_TIME_0 ((relative_time) { 0, 0, 0, 0, 0, 0, 0 })
-#else
-static relative_time const RELATIVE_TIME_0;
-#endif
-
-/* 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. */
- long 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. */
- long int time_zone;
-
- /* Style used for time. */
- int meridian;
-
- /* Gregorian year, month, day, hour, minutes, seconds, and nanoseconds. */
- textint year;
- long int month;
- long int day;
- long int hour;
- long int minutes;
- struct timespec seconds; /* includes nanoseconds */
-
- /* Relative year, month, day, hour, minutes, seconds, and nanoseconds. */
- relative_time rel;
-
- /* Presence or counts of nonterminals of various flavors parsed so far. */
- bool timespec_seen;
- bool rels_seen;
- size_t dates_seen;
- size_t days_seen;
- size_t local_zones_seen;
- size_t dsts_seen;
- size_t times_seen;
- size_t zones_seen;
-
- /* Table of local time zone abbrevations, terminated by a null entry. */
- table local_time_zone_table[3];
-} parser_control;
-
-union YYSTYPE;
-static int yylex (union YYSTYPE *, parser_control *);
-static int yyerror (parser_control const *, char const *);
-static long int time_zone_hhmm (parser_control *, textint, long int);
-
-/* Extract into *PC any date and time info from a string of digits
- of the form e.g., YYYYMMDD, YYMMDD, HHMM, HH (and sometimes YYY,
- YYYY, ...). */
-static void
-digits_to_date_time (parser_control *pc, textint text_int)
-{
- if (pc->dates_seen && ! pc->year.digits
- && ! pc->rels_seen && (pc->times_seen || 2 < text_int.digits))
- pc->year = text_int;
- else
- {
- if (4 < text_int.digits)
- {
- pc->dates_seen++;
- pc->day = text_int.value % 100;
- pc->month = (text_int.value / 100) % 100;
- pc->year.value = text_int.value / 10000;
- pc->year.digits = text_int.digits - 4;
- }
- else
- {
- pc->times_seen++;
- if (text_int.digits <= 2)
- {
- pc->hour = text_int.value;
- pc->minutes = 0;
- }
- else
- {
- pc->hour = text_int.value / 100;
- pc->minutes = text_int.value % 100;
- }
- pc->seconds.tv_sec = 0;
- pc->seconds.tv_nsec = 0;
- pc->meridian = MER24;
- }
- }
-}
-
-/* Increment PC->rel by FACTOR * REL (FACTOR is 1 or -1). */
-static void
-apply_relative_time (parser_control *pc, relative_time rel, int factor)
-{
- pc->rel.ns += factor * rel.ns;
- pc->rel.seconds += factor * rel.seconds;
- pc->rel.minutes += factor * rel.minutes;
- pc->rel.hour += factor * rel.hour;
- pc->rel.day += factor * rel.day;
- pc->rel.month += factor * rel.month;
- pc->rel.year += factor * rel.year;
- pc->rels_seen = true;
-}
-
-/* Set PC-> hour, minutes, seconds and nanoseconds members from arguments. */
-static void
-set_hhmmss (parser_control *pc, long int hour, long int minutes,
- time_t sec, long int nsec)
-{
- pc->hour = hour;
- pc->minutes = minutes;
- pc->seconds.tv_sec = sec;
- pc->seconds.tv_nsec = nsec;
-}
-
-%}
-
-/* We want a reentrant parser, even if the TZ manipulation and the calls to
- localtime and gmtime are not reentrant. */
-%pure-parser
-%parse-param { parser_control *pc }
-%lex-param { parser_control *pc }
-
-/* This grammar has 20 shift/reduce conflicts. */
-%expect 20
-
-%union
-{
- long int intval;
- textint textintval;
- struct timespec timespec;
- relative_time rel;
-}
-
-%token tAGO tDST
-
-%token tYEAR_UNIT tMONTH_UNIT tHOUR_UNIT tMINUTE_UNIT tSEC_UNIT
-%token <intval> tDAY_UNIT tDAY_SHIFT
-
-%token <intval> tDAY tDAYZONE tLOCAL_ZONE tMERIDIAN
-%token <intval> tMONTH tORDINAL tZONE
-
-%token <textintval> tSNUMBER tUNUMBER
-%token <timespec> tSDECIMAL_NUMBER tUDECIMAL_NUMBER
-
-%type <intval> o_colon_minutes o_merid
-%type <timespec> seconds signed_seconds unsigned_seconds
-
-%type <rel> relunit relunit_snumber dayshift
-
-%%
-
-spec:
- timespec
- | items
- ;
-
-timespec:
- '@' seconds
- {
- pc->seconds = $2;
- pc->timespec_seen = true;
- }
- ;
-
-items:
- /* empty */
- | items 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
- | number
- | hybrid
- ;
-
-time:
- tUNUMBER tMERIDIAN
- {
- set_hhmmss (pc, $1.value, 0, 0, 0);
- pc->meridian = $2;
- }
- | tUNUMBER ':' tUNUMBER o_merid
- {
- set_hhmmss (pc, $1.value, $3.value, 0, 0);
- pc->meridian = $4;
- }
- | tUNUMBER ':' tUNUMBER tSNUMBER o_colon_minutes
- {
- set_hhmmss (pc, $1.value, $3.value, 0, 0);
- pc->meridian = MER24;
- pc->zones_seen++;
- pc->time_zone = time_zone_hhmm (pc, $4, $5);
- }
- | tUNUMBER ':' tUNUMBER ':' unsigned_seconds o_merid
- {
- set_hhmmss (pc, $1.value, $3.value, $5.tv_sec, $5.tv_nsec);
- pc->meridian = $6;
- }
- | tUNUMBER ':' tUNUMBER ':' unsigned_seconds tSNUMBER o_colon_minutes
- {
- set_hhmmss (pc, $1.value, $3.value, $5.tv_sec, $5.tv_nsec);
- pc->meridian = MER24;
- pc->zones_seen++;
- pc->time_zone = time_zone_hhmm (pc, $6, $7);
- }
- ;
-
-local_zone:
- tLOCAL_ZONE
- {
- pc->local_isdst = $1;
- pc->dsts_seen += (0 < $1);
- }
- | tLOCAL_ZONE tDST
- {
- pc->local_isdst = 1;
- pc->dsts_seen += (0 < $1) + 1;
- }
- ;
-
-zone:
- tZONE
- { pc->time_zone = $1; }
- | tZONE relunit_snumber
- { pc->time_zone = $1;
- apply_relative_time (pc, $2, 1); }
- | tZONE tSNUMBER o_colon_minutes
- { pc->time_zone = $1 + time_zone_hhmm (pc, $2, $3); }
- | tDAYZONE
- { pc->time_zone = $1 + 60; }
- | tZONE tDST
- { pc->time_zone = $1 + 60; }
- ;
-
-day:
- tDAY
- {
- pc->day_ordinal = 0;
- pc->day_number = $1;
- }
- | tDAY ','
- {
- pc->day_ordinal = 0;
- pc->day_number = $1;
- }
- | tORDINAL tDAY
- {
- pc->day_ordinal = $1;
- pc->day_number = $2;
- }
- | 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 tSNUMBER tSNUMBER
- {
- /* e.g. JUN-17-1992. */
- pc->month = $1;
- pc->day = -$2.value;
- 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
- { apply_relative_time (pc, $1, -1); }
- | relunit
- { apply_relative_time (pc, $1, 1); }
- | dayshift
- { apply_relative_time (pc, $1, 1); }
- ;
-
-relunit:
- tORDINAL tYEAR_UNIT
- { $$ = RELATIVE_TIME_0; $$.year = $1; }
- | tUNUMBER tYEAR_UNIT
- { $$ = RELATIVE_TIME_0; $$.year = $1.value; }
- | tYEAR_UNIT
- { $$ = RELATIVE_TIME_0; $$.year = 1; }
- | tORDINAL tMONTH_UNIT
- { $$ = RELATIVE_TIME_0; $$.month = $1; }
- | tUNUMBER tMONTH_UNIT
- { $$ = RELATIVE_TIME_0; $$.month = $1.value; }
- | tMONTH_UNIT
- { $$ = RELATIVE_TIME_0; $$.month = 1; }
- | tORDINAL tDAY_UNIT
- { $$ = RELATIVE_TIME_0; $$.day = $1 * $2; }
- | tUNUMBER tDAY_UNIT
- { $$ = RELATIVE_TIME_0; $$.day = $1.value * $2; }
- | tDAY_UNIT
- { $$ = RELATIVE_TIME_0; $$.day = $1; }
- | tORDINAL tHOUR_UNIT
- { $$ = RELATIVE_TIME_0; $$.hour = $1; }
- | tUNUMBER tHOUR_UNIT
- { $$ = RELATIVE_TIME_0; $$.hour = $1.value; }
- | tHOUR_UNIT
- { $$ = RELATIVE_TIME_0; $$.hour = 1; }
- | tORDINAL tMINUTE_UNIT
- { $$ = RELATIVE_TIME_0; $$.minutes = $1; }
- | tUNUMBER tMINUTE_UNIT
- { $$ = RELATIVE_TIME_0; $$.minutes = $1.value; }
- | tMINUTE_UNIT
- { $$ = RELATIVE_TIME_0; $$.minutes = 1; }
- | tORDINAL tSEC_UNIT
- { $$ = RELATIVE_TIME_0; $$.seconds = $1; }
- | tUNUMBER tSEC_UNIT
- { $$ = RELATIVE_TIME_0; $$.seconds = $1.value; }
- | tSDECIMAL_NUMBER tSEC_UNIT
- { $$ = RELATIVE_TIME_0; $$.seconds = $1.tv_sec; $$.ns = $1.tv_nsec; }
- | tUDECIMAL_NUMBER tSEC_UNIT
- { $$ = RELATIVE_TIME_0; $$.seconds = $1.tv_sec; $$.ns = $1.tv_nsec; }
- | tSEC_UNIT
- { $$ = RELATIVE_TIME_0; $$.seconds = 1; }
- | relunit_snumber
- ;
-
-relunit_snumber:
- tSNUMBER tYEAR_UNIT
- { $$ = RELATIVE_TIME_0; $$.year = $1.value; }
- | tSNUMBER tMONTH_UNIT
- { $$ = RELATIVE_TIME_0; $$.month = $1.value; }
- | tSNUMBER tDAY_UNIT
- { $$ = RELATIVE_TIME_0; $$.day = $1.value * $2; }
- | tSNUMBER tHOUR_UNIT
- { $$ = RELATIVE_TIME_0; $$.hour = $1.value; }
- | tSNUMBER tMINUTE_UNIT
- { $$ = RELATIVE_TIME_0; $$.minutes = $1.value; }
- | tSNUMBER tSEC_UNIT
- { $$ = RELATIVE_TIME_0; $$.seconds = $1.value; }
- ;
-
-dayshift:
- tDAY_SHIFT
- { $$ = RELATIVE_TIME_0; $$.day = $1; }
- ;
-
-seconds: signed_seconds | unsigned_seconds;
-
-signed_seconds:
- tSDECIMAL_NUMBER
- | tSNUMBER
- { $$.tv_sec = $1.value; $$.tv_nsec = 0; }
- ;
-
-unsigned_seconds:
- tUDECIMAL_NUMBER
- | tUNUMBER
- { $$.tv_sec = $1.value; $$.tv_nsec = 0; }
- ;
-
-number:
- tUNUMBER
- { digits_to_date_time (pc, $1); }
- ;
-
-hybrid:
- tUNUMBER relunit_snumber
- {
- /* Hybrid all-digit and relative offset, so that we accept e.g.,
- "YYYYMMDD +N days" as well as "YYYYMMDD N days". */
- digits_to_date_time (pc, $1);
- apply_relative_time (pc, $2, 1);
- }
- ;
-
-o_colon_minutes:
- /* empty */
- { $$ = -1; }
- | ':' tUNUMBER
- { $$ = $2.value; }
- ;
-
-o_merid:
- /* empty */
- { $$ = MER24; }
- | tMERIDIAN
- { $$ = $1; }
- ;
-
-%%
-
-static table const meridian_table[] =
-{
- { "AM", tMERIDIAN, MERam },
- { "A.M.", tMERIDIAN, MERam },
- { "PM", tMERIDIAN, MERpm },
- { "P.M.", tMERIDIAN, MERpm },
- { NULL, 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 },
- { NULL, 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 },
- { NULL, 0, 0 }
-};
-
-/* Assorted relative-time words. */
-static table const relative_time_table[] =
-{
- { "TOMORROW", tDAY_SHIFT, 1 },
- { "YESTERDAY",tDAY_SHIFT, -1 },
- { "TODAY", tDAY_SHIFT, 0 },
- { "NOW", tDAY_SHIFT, 0 },
- { "LAST", tORDINAL, -1 },
- { "THIS", tORDINAL, 0 },
- { "NEXT", tORDINAL, 1 },
- { "FIRST", tORDINAL, 1 },
-/*{ "SECOND", tORDINAL, 2 }, */
- { "THIRD", tORDINAL, 3 },
- { "FOURTH", tORDINAL, 4 },
- { "FIFTH", tORDINAL, 5 },
- { "SIXTH", tORDINAL, 6 },
- { "SEVENTH", tORDINAL, 7 },
- { "EIGHTH", tORDINAL, 8 },
- { "NINTH", tORDINAL, 9 },
- { "TENTH", tORDINAL, 10 },
- { "ELEVENTH", tORDINAL, 11 },
- { "TWELFTH", tORDINAL, 12 },
- { "AGO", tAGO, 1 },
- { NULL, 0, 0 }
-};
-
-/* The universal time zone table. These labels can be used even for
- time stamps that would not otherwise be valid, e.g., GMT time
- stamps in London during summer. */
-static table const universal_time_zone_table[] =
-{
- { "GMT", tZONE, HOUR ( 0) }, /* Greenwich Mean */
- { "UT", tZONE, HOUR ( 0) }, /* Universal (Coordinated) */
- { "UTC", tZONE, HOUR ( 0) },
- { NULL, 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[] =
-{
- { "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 */
- { NULL, 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) },
- { NULL, 0, 0 }
-};
-
-\f
-
-/* Convert a time zone expressed as HH:MM into an integer count of
- minutes. If MM is negative, then S is of the form HHMM and needs
- to be picked apart; otherwise, S is of the form HH. As specified in
- http://www.opengroup.org/susv3xbd/xbd_chap08.html#tag_08_03, allow
- only valid TZ range, and consider first two digits as hours, if no
- minutes specified. */
-
-static long int
-time_zone_hhmm (parser_control *pc, textint s, long int mm)
-{
- long int n_minutes;
-
- /* If the length of S is 1 or 2 and no minutes are specified,
- interpret it as a number of hours. */
- if (s.digits <= 2 && mm < 0)
- s.value *= 100;
-
- if (mm < 0)
- n_minutes = (s.value / 100) * 60 + s.value % 100;
- else
- n_minutes = s.value * 60 + (s.negative ? -mm : mm);
-
- /* If the absolute number of minutes is larger than 24 hours,
- arrange to reject it by incrementing pc->zones_seen. Thus,
- we allow only values in the range UTC-24:00 to UTC+24:00. */
- if (24 * 60 < abs (n_minutes))
- pc->zones_seen++;
-
- return n_minutes;
-}
-
-static int
-to_hour (long int hours, int meridian)
-{
- switch (meridian)
- {
- default: /* Pacify GCC. */
- 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;
- }
-}
-
-static long int
-to_year (textint textyear)
-{
- long 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. */
- else 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;
-
- for (tp = universal_time_zone_table; tp->name; tp++)
- if (strcmp (name, tp->name) == 0)
- return tp;
-
- /* Try local zone abbreviations before those in time_zone_table, as
- the local ones are 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 NULL;
-}
-
-#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 long 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. */
- int a4 = SHR (a->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (a->tm_year & 3);
- int b4 = SHR (b->tm_year, 2) + SHR (TM_YEAR_BASE, 2) - ! (b->tm_year & 3);
- int a100 = a4 / 25 - (a4 % 25 < 0);
- int b100 = b4 / 25 - (b4 % 25 < 0);
- int a400 = SHR (a100, 2);
- int b400 = SHR (b100, 2);
- int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400);
- long int ayear = a->tm_year;
- long int years = ayear - b->tm_year;
- long 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;
- bool period_found;
- bool abbrev;
-
- /* Make it uppercase. */
- for (p = word; *p; p++)
- {
- unsigned char ch = *p;
- *p = c_toupper (ch);
- }
-
- 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 (period_found = false, p = q = word; (*p = *q); q++)
- if (*q == '.')
- period_found = true;
- else
- p++;
- if (period_found && (tp = lookup_zone (pc, word)))
- return tp;
-
- return NULL;
-}
-
-static int
-yylex (YYSTYPE *lvalp, parser_control *pc)
-{
- unsigned char c;
- size_t count;
-
- for (;;)
- {
- while (c = *pc->input, c_isspace (c))
- pc->input++;
-
- if (ISDIGIT (c) || c == '-' || c == '+')
- {
- char const *p;
- int sign;
- unsigned long int value;
- if (c == '-' || c == '+')
- {
- sign = c == '-' ? -1 : 1;
- while (c = *++pc->input, c_isspace (c))
- continue;
- if (! ISDIGIT (c))
- /* skip the '-' sign */
- continue;
- }
- else
- sign = 0;
- p = pc->input;
- for (value = 0; ; value *= 10)
- {
- unsigned long int value1 = value + (c - '0');
- if (value1 < value)
- return '?';
- value = value1;
- c = *++p;
- if (! ISDIGIT (c))
- break;
- if (ULONG_MAX / 10 < value)
- return '?';
- }
- if ((c == '.' || c == ',') && ISDIGIT (p[1]))
- {
- time_t s;
- int ns;
- int digits;
- unsigned long int value1;
-
- /* Check for overflow when converting value to time_t. */
- if (sign < 0)
- {
- s = - value;
- if (0 < s)
- return '?';
- value1 = -s;
- }
- else
- {
- s = value;
- if (s < 0)
- return '?';
- value1 = s;
- }
- if (value != value1)
- return '?';
-
- /* Accumulate fraction, to ns precision. */
- p++;
- ns = *p++ - '0';
- for (digits = 2; digits <= LOG10_BILLION; digits++)
- {
- ns *= 10;
- if (ISDIGIT (*p))
- ns += *p++ - '0';
- }
-
- /* Skip excess digits, truncating toward -Infinity. */
- if (sign < 0)
- for (; ISDIGIT (*p); p++)
- if (*p != '0')
- {
- ns++;
- break;
- }
- while (ISDIGIT (*p))
- p++;
-
- /* Adjust to the timespec convention, which is that
- tv_nsec is always a positive offset even if tv_sec is
- negative. */
- if (sign < 0 && ns)
- {
- s--;
- if (! (s < 0))
- return '?';
- ns = BILLION - ns;
- }
-
- lvalp->timespec.tv_sec = s;
- lvalp->timespec.tv_nsec = ns;
- pc->input = p;
- return sign ? tSDECIMAL_NUMBER : tUDECIMAL_NUMBER;
- }
- else
- {
- lvalp->textintval.negative = sign < 0;
- if (sign < 0)
- {
- lvalp->textintval.value = - value;
- if (0 < lvalp->textintval.value)
- return '?';
- }
- else
- {
- lvalp->textintval.value = value;
- if (lvalp->textintval.value < 0)
- return '?';
- }
- lvalp->textintval.digits = p - pc->input;
- pc->input = p;
- return sign ? tSNUMBER : tUNUMBER;
- }
- }
-
- if (c_isalpha (c))
- {
- char buff[20];
- char *p = buff;
- table const *tp;
-
- do
- {
- if (p < buff + sizeof buff - 1)
- *p++ = c;
- c = *++pc->input;
- }
- while (c_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 (parser_control const *pc _GL_UNUSED,
- char const *s _GL_UNUSED)
-{
- return 0;
-}
-
-/* If *TM0 is the old and *TM1 is the new value of a struct tm after
- passing it to mktime, return true if it's OK that mktime returned T.
- It's not OK if *TM0 has out-of-range members. */
-
-static bool
-mktime_ok (struct tm const *tm0, struct tm const *tm1, time_t t)
-{
- if (t == (time_t) -1)
- {
- /* Guard against falsely reporting an error when parsing a time
- stamp that happens to equal (time_t) -1, on a host that
- supports such a time stamp. */
- tm1 = localtime (&t);
- if (!tm1)
- return false;
- }
-
- return ! ((tm0->tm_sec ^ tm1->tm_sec)
- | (tm0->tm_min ^ tm1->tm_min)
- | (tm0->tm_hour ^ tm1->tm_hour)
- | (tm0->tm_mday ^ tm1->tm_mday)
- | (tm0->tm_mon ^ tm1->tm_mon)
- | (tm0->tm_year ^ tm1->tm_year));
-}
-
-/* A reasonable upper bound for the size of ordinary TZ strings.
- Use heap allocation if TZ's length exceeds this. */
-enum { TZBUFSIZE = 100 };
-
-/* Return a copy of TZ, stored in TZBUF if it fits, and heap-allocated
- otherwise. */
-static char *
-get_tz (char tzbuf[TZBUFSIZE])
-{
- char *tz = getenv ("TZ");
- if (tz)
- {
- size_t tzsize = strlen (tz) + 1;
- tz = (tzsize <= TZBUFSIZE
- ? memcpy (tzbuf, tz, tzsize)
- : xmemdup (tz, tzsize));
- }
- return tz;
-}
-
-/* Parse a date/time string, storing the resulting time value into *RESULT.
- The string itself is pointed to by P. Return true if successful.
- P can be an incomplete or relative time specification; if so, use
- *NOW as the basis for the returned time. */
-bool
-get_date (struct timespec *result, char const *p, struct timespec const *now)
-{
- time_t Start;
- long int Start_ns;
- struct tm const *tmp;
- struct tm tm;
- struct tm tm0;
- parser_control pc;
- struct timespec gettime_buffer;
- unsigned char c;
- bool tz_was_altered = false;
- char *tz0 = NULL;
- char tz0buf[TZBUFSIZE];
- bool ok = true;
-
- if (! now)
- {
- gettime (&gettime_buffer);
- now = &gettime_buffer;
- }
-
- Start = now->tv_sec;
- Start_ns = now->tv_nsec;
-
- tmp = localtime (&now->tv_sec);
- if (! tmp)
- return false;
-
- while (c = *p, c_isspace (c))
- p++;
-
- if (strncmp (p, "TZ=\"", 4) == 0)
- {
- char const *tzbase = p + 4;
- size_t tzsize = 1;
- char const *s;
-
- for (s = tzbase; *s; s++, tzsize++)
- if (*s == '\\')
- {
- s++;
- if (! (*s == '\\' || *s == '"'))
- break;
- }
- else if (*s == '"')
- {
- char *z;
- char *tz1;
- char tz1buf[TZBUFSIZE];
- bool large_tz = TZBUFSIZE < tzsize;
- bool setenv_ok;
- /* Free tz0, in case this is the 2nd or subsequent time through. */
- free (tz0);
- tz0 = get_tz (tz0buf);
- z = tz1 = large_tz ? xmalloc (tzsize) : tz1buf;
- for (s = tzbase; *s != '"'; s++)
- *z++ = *(s += *s == '\\');
- *z = '\0';
- setenv_ok = setenv ("TZ", tz1, 1) == 0;
- if (large_tz)
- free (tz1);
- if (!setenv_ok)
- goto fail;
- tz_was_altered = true;
- p = s + 1;
- }
- }
-
- /* As documented, be careful to treat the empty string just like
- a date string of "0". Without this, an empty string would be
- declared invalid when parsed during a DST transition. */
- if (*p == '\0')
- p = "0";
-
- pc.input = p;
- pc.year.value = tmp->tm_year;
- pc.year.value += TM_YEAR_BASE;
- pc.year.digits = 0;
- pc.month = tmp->tm_mon + 1;
- pc.day = tmp->tm_mday;
- pc.hour = tmp->tm_hour;
- pc.minutes = tmp->tm_min;
- pc.seconds.tv_sec = tmp->tm_sec;
- pc.seconds.tv_nsec = Start_ns;
- tm.tm_isdst = tmp->tm_isdst;
-
- pc.meridian = MER24;
- pc.rel = RELATIVE_TIME_0;
- pc.timespec_seen = false;
- pc.rels_seen = false;
- pc.dates_seen = 0;
- pc.days_seen = 0;
- pc.times_seen = 0;
- pc.local_zones_seen = 0;
- pc.dsts_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 = NULL;
-
- /* 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 const *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 = NULL;
- }
- break;
- }
- }
- }
-#else
-#if HAVE_TZNAME
- {
-# if !HAVE_DECL_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 = NULL;
- }
-#else
- pc.local_time_zone_table[0].name = NULL;
-#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 = NULL;
- }
-
- if (yyparse (&pc) != 0)
- goto fail;
-
- if (pc.timespec_seen)
- *result = pc.seconds;
- else
- {
- if (1 < (pc.times_seen | pc.dates_seen | pc.days_seen | pc.dsts_seen
- | (pc.local_zones_seen + pc.zones_seen)))
- goto fail;
-
- tm.tm_year = to_year (pc.year) - TM_YEAR_BASE;
- tm.tm_mon = pc.month - 1;
- tm.tm_mday = pc.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)
- goto fail;
- tm.tm_min = pc.minutes;
- tm.tm_sec = pc.seconds.tv_sec;
- }
- else
- {
- tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
- pc.seconds.tv_nsec = 0;
- }
-
- /* Let mktime deduce tm_isdst if we have an absolute time stamp. */
- if (pc.dates_seen | pc.days_seen | pc.times_seen)
- 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 (! mktime_ok (&tm0, &tm, Start))
- {
- if (! pc.zones_seen)
- goto fail;
- else
- {
- /* Guard against falsely reporting errors near the time_t
- boundaries when parsing times in other time zones. For
- example, suppose the input string "1969-12-31 23:00:00 -0100",
- the current time zone is 8 hours ahead of UTC, and the min
- time_t value is 1970-01-01 00:00:00 UTC. Then the min
- localtime value is 1970-01-01 08:00:00, and mktime will
- therefore fail on 1969-12-31 23:00:00. To work around the
- problem, set the time zone to 1 hour behind UTC temporarily
- by setting TZ="XXX1:00" and try mktime again. */
-
- long int time_zone = pc.time_zone;
- long int abs_time_zone = time_zone < 0 ? - time_zone : time_zone;
- long int abs_time_zone_hour = abs_time_zone / 60;
- int abs_time_zone_min = abs_time_zone % 60;
- char tz1buf[sizeof "XXX+0:00"
- + sizeof pc.time_zone * CHAR_BIT / 3];
- if (!tz_was_altered)
- tz0 = get_tz (tz0buf);
- sprintf (tz1buf, "XXX%s%ld:%02d", "-" + (time_zone < 0),
- abs_time_zone_hour, abs_time_zone_min);
- if (setenv ("TZ", tz1buf, 1) != 0)
- goto fail;
- tz_was_altered = true;
- tm = tm0;
- Start = mktime (&tm);
- if (! mktime_ok (&tm0, &tm, Start))
- goto fail;
- }
- }
-
- 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_wday != pc.day_number)));
- tm.tm_isdst = -1;
- Start = mktime (&tm);
- if (Start == (time_t) -1)
- goto fail;
- }
-
- /* Add relative date. */
- if (pc.rel.year | pc.rel.month | pc.rel.day)
- {
- int year = tm.tm_year + pc.rel.year;
- int month = tm.tm_mon + pc.rel.month;
- int day = tm.tm_mday + pc.rel.day;
- if (((year < tm.tm_year) ^ (pc.rel.year < 0))
- | ((month < tm.tm_mon) ^ (pc.rel.month < 0))
- | ((day < tm.tm_mday) ^ (pc.rel.day < 0)))
- goto fail;
- tm.tm_year = year;
- tm.tm_mon = month;
- tm.tm_mday = day;
- tm.tm_hour = tm0.tm_hour;
- tm.tm_min = tm0.tm_min;
- tm.tm_sec = tm0.tm_sec;
- tm.tm_isdst = tm0.tm_isdst;
- Start = mktime (&tm);
- if (Start == (time_t) -1)
- goto fail;
- }
-
- /* The only "output" of this if-block is an updated Start value,
- so this block must follow others that clobber Start. */
- if (pc.zones_seen)
- {
- long int delta = pc.time_zone * 60;
- time_t t1;
-#ifdef HAVE_TM_GMTOFF
- delta -= tm.tm_gmtoff;
-#else
- time_t t = Start;
- struct tm const *gmt = gmtime (&t);
- if (! gmt)
- goto fail;
- delta -= tm_diff (&tm, gmt);
-#endif
- t1 = Start - delta;
- if ((Start < t1) != (delta < 0))
- goto fail; /* time_t overflow */
- Start = t1;
- }
-
- /* Add relative hours, minutes, and seconds. On hosts that support
- leap seconds, ignore the possibility of leap seconds; e.g.,
- "+ 10 minutes" adds 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. */
- {
- long int sum_ns = pc.seconds.tv_nsec + pc.rel.ns;
- long int normalized_ns = (sum_ns % BILLION + BILLION) % BILLION;
- time_t t0 = Start;
- long int d1 = 60 * 60 * pc.rel.hour;
- time_t t1 = t0 + d1;
- long int d2 = 60 * pc.rel.minutes;
- time_t t2 = t1 + d2;
- long_time_t d3 = pc.rel.seconds;
- long_time_t t3 = t2 + d3;
- long int d4 = (sum_ns - normalized_ns) / BILLION;
- long_time_t t4 = t3 + d4;
- time_t t5 = t4;
-
- if ((d1 / (60 * 60) ^ pc.rel.hour)
- | (d2 / 60 ^ pc.rel.minutes)
- | ((t1 < t0) ^ (d1 < 0))
- | ((t2 < t1) ^ (d2 < 0))
- | ((t3 < t2) ^ (d3 < 0))
- | ((t4 < t3) ^ (d4 < 0))
- | (t5 != t4))
- goto fail;
-
- result->tv_sec = t5;
- result->tv_nsec = normalized_ns;
- }
- }
-
- goto done;
-
- fail:
- ok = false;
- done:
- if (tz_was_altered)
- ok &= (tz0 ? setenv ("TZ", tz0, 1) : unsetenv ("TZ")) == 0;
- if (tz0 != tz0buf)
- free (tz0);
- return ok;
-}
-
-#if TEST
-
-int
-main (int ac, char **av)
-{
- char buff[BUFSIZ];
-
- printf ("Enter date, or blank line to exit.\n\t> ");
- fflush (stdout);
-
- buff[BUFSIZ - 1] = '\0';
- while (fgets (buff, BUFSIZ - 1, stdin) && buff[0])
- {
- struct timespec d;
- struct tm const *tm;
- if (! get_date (&d, buff, NULL))
- printf ("Bad format - couldn't convert.\n");
- else if (! (tm = localtime (&d.tv_sec)))
- {
- long int sec = d.tv_sec;
- printf ("localtime (%ld) failed\n", sec);
- }
- else
- {
- int ns = d.tv_nsec;
- printf ("%04ld-%02d-%02d %02d:%02d:%02d.%09d\n",
- tm->tm_year + 1900L, tm->tm_mon + 1, tm->tm_mday,
- tm->tm_hour, tm->tm_min, tm->tm_sec, ns);
- }
- printf ("\t> ");
- fflush (stdout);
- }
- return 0;
-}
-#endif /* TEST */
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