%{
-/*
-** 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.
-**
-** This code is in the public domain and has no copyright.
-*/
+/* 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>
-# ifdef HAVE_ALLOCA_H
-# include <alloca.h>
-# endif
#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
# undef static
#endif
-#include <stdio.h>
#include <ctype.h>
#if HAVE_STDLIB_H
# include <stdlib.h> /* for `free'; used by Bison 1.27 */
#endif
-#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
+#if STDC_HEADERS || (! defined isascii && ! HAVE_ISASCII)
# define IN_CTYPE_DOMAIN(c) 1
#else
-# define IN_CTYPE_DOMAIN(c) isascii(c)
+# 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 ISUPPER(c) (IN_CTYPE_DOMAIN (c) && isupper (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 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 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. */
+ 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 defined (STDC_HEADERS) || defined (USG)
+#if STDC_HEADERS || HAVE_STRING_H
# include <string.h>
#endif
-#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
+#if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
# define __attribute__(x)
#endif
# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
-/* Some old versions of bison generate parsers that use bcopy.
- That loses on systems that don't provide the function, so we have
- to redefine it here. */
-#if !defined (HAVE_BCOPY) && defined (HAVE_MEMCPY) && !defined (bcopy)
-# define bcopy(from, to, len) memcpy ((to), (from), (len))
-#endif
+#define EPOCH_YEAR 1970
+#define TM_YEAR_BASE 1900
-/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
- as well as gratuitiously global symbol names, so we can have multiple
- yacc generated parsers in the same program. Note that these are only
- the variables produced by yacc. If other parser generators (bison,
- byacc, etc) produce additional global names that conflict at link time,
- then those parser generators need to be fixed instead of adding those
- names to this list. */
-
-#define yymaxdepth gd_maxdepth
-#define yyparse gd_parse
-#define yylex gd_lex
-#define yyerror gd_error
-#define yylval gd_lval
-#define yychar gd_char
-#define yydebug gd_debug
-#define yypact gd_pact
-#define yyr1 gd_r1
-#define yyr2 gd_r2
-#define yydef gd_def
-#define yychk gd_chk
-#define yypgo gd_pgo
-#define yyact gd_act
-#define yyexca gd_exca
-#define yyerrflag gd_errflag
-#define yynerrs gd_nerrs
-#define yyps gd_ps
-#define yypv gd_pv
-#define yys gd_s
-#define yy_yys gd_yys
-#define yystate gd_state
-#define yytmp gd_tmp
-#define yyv gd_v
-#define yy_yyv gd_yyv
-#define yyval gd_val
-#define yylloc gd_lloc
-#define yyreds gd_reds /* With YYDEBUG defined */
-#define yytoks gd_toks /* With YYDEBUG defined */
-#define yylhs gd_yylhs
-#define yylen gd_yylen
-#define yydefred gd_yydefred
-#define yydgoto gd_yydgoto
-#define yysindex gd_yysindex
-#define yyrindex gd_yyrindex
-#define yygindex gd_yygindex
-#define yytable gd_yytable
-#define yycheck gd_yycheck
+#define HOUR(x) ((x) * 60)
-static int yylex ();
-static int yyerror ();
+/* An integer value, and the number of digits in its textual
+ representation. */
+typedef struct
+{
+ int value;
+ int digits;
+} textint;
-#define EPOCH 1970
-#define HOUR(x) ((x) * 60)
-
-#define MAX_BUFF_LEN 128 /* size of buffer to read the date into */
-
-/*
-** An entry in the lexical lookup table.
-*/
-typedef struct _TABLE {
- const char *name;
- int type;
- int value;
-} TABLE;
-
-
-/*
-** Meridian: am, pm, or 24-hour style.
-*/
-typedef enum _MERIDIAN {
- MERam, MERpm, MER24
-} MERIDIAN;
-
-
-/*
-** Global variables. We could get rid of most of these by using a good
-** union as the yacc stack. (This routine was originally written before
-** yacc had the %union construct.) Maybe someday; right now we only use
-** the %union very rarely.
-*/
-static const char *yyInput;
-static int yyDayOrdinal;
-static int yyDayNumber;
-static int yyHaveDate;
-static int yyHaveDay;
-static int yyHaveRel;
-static int yyHaveTime;
-static int yyHaveZone;
-static int yyTimezone;
-static int yyDay;
-static int yyHour;
-static int yyMinutes;
-static int yyMonth;
-static int yySeconds;
-static int yyYear;
-static MERIDIAN yyMeridian;
-static int yyRelDay;
-static int yyRelHour;
-static int yyRelMinutes;
-static int yyRelMonth;
-static int yyRelSeconds;
-static int yyRelYear;
+/* 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 Number;
- enum _MERIDIAN Meridian;
+%union
+{
+ int intval;
+ textint textintval;
}
-%token tAGO tDAY tDAY_UNIT tDAYZONE tDST tHOUR_UNIT tID
-%token tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
-%token tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE
-
-%type <Number> tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tMINUTE_UNIT
-%type <Number> tMONTH tMONTH_UNIT
-%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE
-%type <Meridian> tMERIDIAN o_merid
+%token tAGO tDST
-%%
-
-spec : /* NULL */
- | spec item
- ;
+%token <intval> tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tLOCAL_ZONE tMERIDIAN
+%token <intval> tMINUTE_UNIT tMONTH tMONTH_UNIT tSEC_UNIT tYEAR_UNIT tZONE
-item : time {
- yyHaveTime++;
- }
- | zone {
- yyHaveZone++;
- }
- | date {
- yyHaveDate++;
- }
- | day {
- yyHaveDay++;
- }
- | rel {
- yyHaveRel++;
- }
- | number
- ;
-
-time : tUNUMBER tMERIDIAN {
- yyHour = $1;
- yyMinutes = 0;
- yySeconds = 0;
- yyMeridian = $2;
- }
- | tUNUMBER ':' tUNUMBER o_merid {
- yyHour = $1;
- yyMinutes = $3;
- yySeconds = 0;
- yyMeridian = $4;
- }
- | tUNUMBER ':' tUNUMBER tSNUMBER {
- yyHour = $1;
- yyMinutes = $3;
- yyMeridian = MER24;
- yyHaveZone++;
- yyTimezone = ($4 < 0
- ? -$4 % 100 + (-$4 / 100) * 60
- : - ($4 % 100 + ($4 / 100) * 60));
- }
- | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
- yyHour = $1;
- yyMinutes = $3;
- yySeconds = $5;
- yyMeridian = $6;
- }
- | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
- yyHour = $1;
- yyMinutes = $3;
- yySeconds = $5;
- yyMeridian = MER24;
- yyHaveZone++;
- yyTimezone = ($6 < 0
- ? -$6 % 100 + (-$6 / 100) * 60
- : - ($6 % 100 + ($6 / 100) * 60));
- }
- ;
+%token <textintval> tSNUMBER tUNUMBER
-zone : tZONE {
- yyTimezone = $1;
- }
- | tDAYZONE {
- yyTimezone = $1 - 60;
- }
- |
- tZONE tDST {
- yyTimezone = $1 - 60;
- }
- ;
+%type <intval> o_merid
-day : tDAY {
- yyDayOrdinal = 1;
- yyDayNumber = $1;
- }
- | tDAY ',' {
- yyDayOrdinal = 1;
- yyDayNumber = $1;
- }
- | tUNUMBER tDAY {
- yyDayOrdinal = $1;
- yyDayNumber = $2;
- }
- ;
+%%
-date : tUNUMBER '/' tUNUMBER {
- yyMonth = $1;
- yyDay = $3;
- }
- | tUNUMBER '/' tUNUMBER '/' tUNUMBER {
- /* Interpret as YYYY/MM/DD if $1 >= 1000, 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 ($1 >= 1000)
- {
- yyYear = $1;
- yyMonth = $3;
- yyDay = $5;
- }
- else
- {
- yyMonth = $1;
- yyDay = $3;
- yyYear = $5;
- }
- }
- | tUNUMBER tSNUMBER tSNUMBER {
- /* ISO 8601 format. yyyy-mm-dd. */
- yyYear = $1;
- yyMonth = -$2;
- yyDay = -$3;
- }
- | tUNUMBER tMONTH tSNUMBER {
- /* e.g. 17-JUN-1992. */
- yyDay = $1;
- yyMonth = $2;
- yyYear = -$3;
- }
- | tMONTH tUNUMBER {
- yyMonth = $1;
- yyDay = $2;
- }
- | tMONTH tUNUMBER ',' tUNUMBER {
- yyMonth = $1;
- yyDay = $2;
- yyYear = $4;
- }
- | tUNUMBER tMONTH {
- yyMonth = $2;
- yyDay = $1;
- }
- | tUNUMBER tMONTH tUNUMBER {
- yyMonth = $2;
- yyDay = $1;
- yyYear = $3;
- }
- ;
-
-rel : relunit tAGO {
- yyRelSeconds = -yyRelSeconds;
- yyRelMinutes = -yyRelMinutes;
- yyRelHour = -yyRelHour;
- yyRelDay = -yyRelDay;
- yyRelMonth = -yyRelMonth;
- yyRelYear = -yyRelYear;
- }
- | relunit
- ;
+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;
+ }
+ ;
-relunit : tUNUMBER tYEAR_UNIT {
- yyRelYear += $1 * $2;
- }
- | tSNUMBER tYEAR_UNIT {
- yyRelYear += $1 * $2;
- }
- | tYEAR_UNIT {
- yyRelYear += $1;
- }
- | tUNUMBER tMONTH_UNIT {
- yyRelMonth += $1 * $2;
- }
- | tSNUMBER tMONTH_UNIT {
- yyRelMonth += $1 * $2;
- }
- | tMONTH_UNIT {
- yyRelMonth += $1;
- }
- | tUNUMBER tDAY_UNIT {
- yyRelDay += $1 * $2;
- }
- | tSNUMBER tDAY_UNIT {
- yyRelDay += $1 * $2;
- }
- | tDAY_UNIT {
- yyRelDay += $1;
- }
- | tUNUMBER tHOUR_UNIT {
- yyRelHour += $1 * $2;
- }
- | tSNUMBER tHOUR_UNIT {
- yyRelHour += $1 * $2;
- }
- | tHOUR_UNIT {
- yyRelHour += $1;
- }
- | tUNUMBER tMINUTE_UNIT {
- yyRelMinutes += $1 * $2;
- }
- | tSNUMBER tMINUTE_UNIT {
- yyRelMinutes += $1 * $2;
- }
- | tMINUTE_UNIT {
- yyRelMinutes += $1;
- }
- | tUNUMBER tSEC_UNIT {
- yyRelSeconds += $1 * $2;
- }
- | tSNUMBER tSEC_UNIT {
- yyRelSeconds += $1 * $2;
- }
- | tSEC_UNIT {
- yyRelSeconds += $1;
- }
- ;
+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;
+ }
+ ;
-number : tUNUMBER
- {
- if (yyHaveTime && yyHaveDate && !yyHaveRel)
- yyYear = $1;
+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
{
- if ($1>10000)
+ PC.times_seen++;
+ if ($1.digits <= 2)
{
- yyHaveDate++;
- yyDay= ($1)%100;
- yyMonth= ($1/100)%100;
- yyYear = $1/10000;
+ PC.hour = $1.value;
+ PC.minutes = 0;
}
else
{
- yyHaveTime++;
- if ($1 < 100)
- {
- yyHour = $1;
- yyMinutes = 0;
- }
- else
- {
- yyHour = $1 / 100;
- yyMinutes = $1 % 100;
- }
- yySeconds = 0;
- yyMeridian = MER24;
+ PC.hour = $1.value / 100;
+ PC.minutes = $1.value % 100;
}
+ PC.seconds = 0;
+ PC.meridian = MER24;
}
}
- ;
+ }
+ ;
-o_merid : /* NULL */
- {
- $$ = MER24;
- }
- | tMERIDIAN
- {
- $$ = $1;
- }
- ;
+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 does. */
+ 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
-extern struct tm *gmtime ();
-extern struct tm *localtime ();
-extern time_t mktime ();
-
-/* Month and day table. */
-static TABLE const MonthDayTable[] = {
- { "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 meridian_table[] =
+{
+ { "AM", tMERIDIAN, MERam },
+ { "A.M.", tMERIDIAN, MERam },
+ { "PM", tMERIDIAN, MERpm },
+ { "P.M.", tMERIDIAN, MERpm },
+ { 0, 0, 0 }
};
-/* Time units table. */
-static TABLE const UnitsTable[] = {
- { "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 }
+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 OtherTable[] = {
- { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
- { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
- { "today", tMINUTE_UNIT, 0 },
- { "now", tMINUTE_UNIT, 0 },
- { "last", tUNUMBER, -1 },
- { "this", tMINUTE_UNIT, 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 },
- { NULL, 0, 0 }
+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 timezone table. This table is necessarily incomplete, as time
+/* 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 TimezoneTable[] = {
- { "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 */
- { NULL, 0, 0 }
+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 timezone table. */
-static TABLE const MilitaryTable[] = {
- { "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 }
+/* 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
-
-/* ARGSUSED */
-static int
-yyerror (s)
- char *s ATTRIBUTE_UNUSED;
-{
- return 0;
-}
-
static int
-ToHour (Hours, Meridian)
- int Hours;
- MERIDIAN Meridian;
+to_hour (int hours, int meridian)
{
- switch (Meridian)
+ switch (meridian)
{
case MER24:
- if (Hours < 0 || Hours > 23)
- return -1;
- return Hours;
+ return 0 <= hours && hours < 24 ? hours : -1;
case MERam:
- if (Hours < 1 || Hours > 12)
- return -1;
- if (Hours == 12)
- Hours = 0;
- return Hours;
+ return 0 < hours && hours < 12 ? hours : hours == 12 ? 0 : -1;
case MERpm:
- if (Hours < 1 || Hours > 12)
- return -1;
- if (Hours == 12)
- Hours = 0;
- return Hours + 12;
+ return 0 < hours && hours < 12 ? hours + 12 : hours == 12 ? 12 : -1;
default:
abort ();
}
}
static int
-ToYear (Year)
- int Year;
+to_year (textint textyear)
{
- if (Year < 0)
- Year = -Year;
+ 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 (Year < 69)
- Year += 2000;
- else if (Year < 100)
- Year += 1900;
+ if (textyear.digits == 2)
+ year += year < 69 ? 2000 : 1900;
- return Year;
+ 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
-LookupWord (buff)
- char *buff;
+tm_diff (struct tm const *a, struct tm const *b)
{
- register char *p;
- register char *q;
- register const TABLE *tp;
+ /* 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 lowercase. */
- for (p = buff; *p; p++)
- if (ISUPPER ((unsigned char) *p))
- *p = tolower (*p);
+ /* Make it uppercase. */
+ for (p = word; *p; p++)
+ if (ISLOWER ((unsigned char) *p))
+ *p = toupper ((unsigned char) *p);
- if (strcmp (buff, "am") == 0 || strcmp (buff, "a.m.") == 0)
- {
- yylval.Meridian = MERam;
- return tMERIDIAN;
- }
- if (strcmp (buff, "pm") == 0 || strcmp (buff, "p.m.") == 0)
- {
- yylval.Meridian = MERpm;
- return tMERIDIAN;
- }
+ for (tp = meridian_table; tp->name; tp++)
+ if (strcmp (word, tp->name) == 0)
+ return tp;
/* See if we have an abbreviation for a month. */
- if (strlen (buff) == 3)
- abbrev = 1;
- else if (strlen (buff) == 4 && buff[3] == '.')
- {
- abbrev = 1;
- buff[3] = '\0';
- }
- else
- abbrev = 0;
+ wordlen = strlen (word);
+ abbrev = wordlen == 3 || (wordlen == 4 && word[3] == '.');
- for (tp = MonthDayTable; tp->name; tp++)
- {
- if (abbrev)
- {
- if (strncmp (buff, tp->name, 3) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
- }
- else if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
- }
+ for (tp = month_and_day_table; tp->name; tp++)
+ if ((abbrev ? strncmp (word, tp->name, 3) : strcmp (word, tp->name)) == 0)
+ return tp;
- for (tp = TimezoneTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
+ if ((tp = lookup_zone (pc, word)))
+ return tp;
- if (strcmp (buff, "dst") == 0)
- return tDST;
+ if (strcmp (word, dst_table[0].name) == 0)
+ return dst_table;
- for (tp = UnitsTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
+ 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. */
- i = strlen (buff) - 1;
- if (buff[i] == 's')
+ if (word[wordlen - 1] == 'S')
{
- buff[i] = '\0';
- for (tp = UnitsTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
- buff[i] = 's'; /* Put back for "this" in OtherTable. */
+ 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 = OtherTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
+ for (tp = relative_time_table; tp->name; tp++)
+ if (strcmp (word, tp->name) == 0)
+ return tp;
- /* Military timezones. */
- if (buff[1] == '\0' && ISALPHA ((unsigned char) *buff))
- {
- for (tp = MilitaryTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
- }
+ /* 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 timezone table again. */
- for (i = 0, p = q = buff; *q; q++)
- if (*q != '.')
- *p++ = *q;
+ /* 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
- i++;
- *p = '\0';
- if (i)
- for (tp = TimezoneTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
+ p++;
+ if (i && (tp = lookup_zone (pc, word)))
+ return tp;
- return tID;
+ return 0;
}
static int
-yylex ()
+yylex (YYSTYPE *lvalp, parser_control *pc)
{
- register unsigned char c;
- register char *p;
- char buff[20];
- int Count;
- int sign;
+ unsigned char c;
+ int count;
for (;;)
{
- while (ISSPACE ((unsigned char) *yyInput))
- yyInput++;
+ while (c = *pc->input, ISSPACE (c))
+ pc->input++;
- if (ISDIGIT (c = *yyInput) || c == '-' || c == '+')
+ if (ISDIGIT (c) || c == '-' || c == '+')
{
+ char const *p;
+ int sign;
+ int value;
if (c == '-' || c == '+')
{
sign = c == '-' ? -1 : 1;
- if (!ISDIGIT (*++yyInput))
+ c = *++pc->input;
+ if (! ISDIGIT (c))
/* skip the '-' sign */
continue;
}
else
sign = 0;
- for (yylval.Number = 0; ISDIGIT (c = *yyInput++);)
- yylval.Number = 10 * yylval.Number + c - '0';
- yyInput--;
- if (sign < 0)
- yylval.Number = -yylval.Number;
+ 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))
{
- for (p = buff; (c = *yyInput++, ISALPHA (c)) || c == '.';)
- if (p < &buff[sizeof buff - 1])
- *p++ = 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';
- yyInput--;
- return LookupWord (buff);
+ tp = lookup_word (pc, buff);
+ if (! tp)
+ return '?';
+ lvalp->intval = tp->value;
+ return tp->type;
}
+
if (c != '(')
- return *yyInput++;
- Count = 0;
+ return *pc->input++;
+ count = 0;
do
{
- c = *yyInput++;
+ c = *pc->input++;
if (c == '\0')
return c;
if (c == '(')
- Count++;
+ count++;
else if (c == ')')
- Count--;
+ count--;
}
- while (Count > 0);
+ while (count > 0);
}
}
-#define TM_YEAR_ORIGIN 1900
-
-/* Yield A - B, measured in seconds. */
-static long
-difftm (struct tm *a, struct tm *b)
+/* Do nothing if the parser reports an error. */
+static int
+yyerror (char *s ATTRIBUTE_UNUSED)
{
- int ay = a->tm_year + (TM_YEAR_ORIGIN - 1);
- int by = b->tm_year + (TM_YEAR_ORIGIN - 1);
- long days = (
- /* difference in day of year */
- a->tm_yday - b->tm_yday
- /* + intervening leap days */
- + ((ay >> 2) - (by >> 2))
- - (ay / 100 - by / 100)
- + ((ay / 100 >> 2) - (by / 100 >> 2))
- /* + difference in years * 365 */
- + (long) (ay - by) * 365
- );
- return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour))
- + (a->tm_min - b->tm_min))
- + (a->tm_sec - b->tm_sec));
+ 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)
{
- struct tm tm, tm0, *tmp;
- time_t Start;
+ time_t Start = now ? *now : time (0);
+ struct tm *tmp = localtime (&Start);
+ struct tm tm;
+ struct tm tm0;
+ parser_control pc;
- yyInput = p;
- Start = now ? *now : time ((time_t *) NULL);
- tmp = localtime (&Start);
- if (!tmp)
+ if (! tmp)
return -1;
- yyYear = tmp->tm_year + TM_YEAR_ORIGIN;
- yyMonth = tmp->tm_mon + 1;
- yyDay = tmp->tm_mday;
- yyHour = tmp->tm_hour;
- yyMinutes = tmp->tm_min;
- yySeconds = tmp->tm_sec;
+
+ 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;
- yyMeridian = MER24;
- yyRelSeconds = 0;
- yyRelMinutes = 0;
- yyRelHour = 0;
- yyRelDay = 0;
- yyRelMonth = 0;
- yyRelYear = 0;
- yyHaveDate = 0;
- yyHaveDay = 0;
- yyHaveRel = 0;
- yyHaveTime = 0;
- yyHaveZone = 0;
-
- if (yyparse ()
- || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
+
+ 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 = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear;
- tm.tm_mon = yyMonth - 1 + yyRelMonth;
- tm.tm_mday = yyDay + yyRelDay;
- if (yyHaveTime || (yyHaveRel && !yyHaveDate && !yyHaveDay))
+ 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 = ToHour (yyHour, yyMeridian);
+ tm.tm_hour = to_hour (pc.hour, pc.meridian);
if (tm.tm_hour < 0)
return -1;
- tm.tm_min = yyMinutes;
- tm.tm_sec = yySeconds;
+ tm.tm_min = pc.minutes;
+ tm.tm_sec = pc.seconds;
}
else
{
tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
}
- tm.tm_hour += yyRelHour;
- tm.tm_min += yyRelMinutes;
- tm.tm_sec += yyRelSeconds;
- /* Let mktime deduce tm_isdst if we have an absolute timestamp,
- or if the relative timestamp mentions days, months, or years. */
- if (yyHaveDate | yyHaveDay | yyHaveTime | yyRelDay | yyRelMonth | yyRelYear)
+ /* 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);
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 (yyHaveZone)
+ if (pc.zones_seen)
{
tm = tm0;
- if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN)
+ if (tm.tm_year <= EPOCH_YEAR - TM_YEAR_BASE)
{
tm.tm_mday++;
- yyTimezone -= 24 * 60;
+ pc.time_zone += 24 * 60;
}
else
{
tm.tm_mday--;
- yyTimezone += 24 * 60;
+ pc.time_zone -= 24 * 60;
}
Start = mktime (&tm);
}
return Start;
}
- if (yyHaveDay && !yyHaveDate)
+ if (pc.days_seen && ! pc.dates_seen)
{
- tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7
- + 7 * (yyDayOrdinal - (0 < yyDayOrdinal)));
+ 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 (yyHaveZone)
+ if (pc.zones_seen)
{
- long delta;
+ int delta = pc.time_zone * 60;
+#ifdef HAVE_TM_GMTOFF
+ delta -= tm.tm_gmtoff;
+#else
struct tm *gmt = gmtime (&Start);
- if (!gmt)
+ if (! gmt)
return -1;
- delta = yyTimezone * 60L + difftm (&tm, gmt);
- if ((Start + delta < Start) != (delta < 0))
- return -1; /* time_t overflow */
- Start += delta;
+ 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 defined (TEST)
+#if TEST
+
+#include <stdio.h>
-/* ARGSUSED */
int
-main (ac, av)
- int ac;
- char *av[];
+main (int ac, char **av)
{
- char buff[MAX_BUFF_LEN + 1];
+ char buff[BUFSIZ];
time_t d;
- (void) printf ("Enter date, or blank line to exit.\n\t> ");
- (void) fflush (stdout);
+ printf ("Enter date, or blank line to exit.\n\t> ");
+ fflush (stdout);
- buff[MAX_BUFF_LEN] = 0;
- while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
+ buff[BUFSIZ - 1] = 0;
+ while (fgets (buff, BUFSIZ - 1, stdin) && buff[0])
{
- d = get_date (buff, (time_t *) NULL);
- if (d == -1)
- (void) printf ("Bad format - couldn't convert.\n");
+ d = get_date (buff, 0);
+ if (d == (time_t) -1)
+ printf ("Bad format - couldn't convert.\n");
else
- (void) printf ("%s", ctime (&d));
- (void) printf ("\t> ");
- (void) fflush (stdout);
+ printf ("%s", ctime (&d));
+ printf ("\t> ");
+ fflush (stdout);
}
- exit (0);
- /* NOTREACHED */
+ return 0;
}
-#endif /* defined (TEST) */
+#endif /* defined TEST */
projects / chaz / tar / blobdiff