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-%{
-/*
-** 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 grammar has 13 shift/reduce conflicts.
-**
-** This code is in the public domain and has no copyright.
-*/
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-# ifdef FORCE_ALLOCA_H
-# include <alloca.h>
-# endif
-#endif
-
-/* Since the code of getdate.y is not included in the Emacs executable
- itself, there is no need to #define static in this file. Even if
- the code were included in the Emacs executable, it probably
- wouldn't do any harm to #undef it here; this will only cause
- problems if we try to write to a static variable, which I don't
- think this code needs to do. */
-#ifdef emacs
-# undef static
-#endif
-
-#include <stdio.h>
-#include <ctype.h>
-#include <time.h>
-
-#include "getdate.h"
-
-#include <string.h>
-
-/* 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 (bcopy)
-# define bcopy(from, to, len) memcpy ((to), (from), (len))
-#endif
-
-/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
- as well as gratuitously 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
-
-static int yylex (void);
-static int yyerror (const char *s);
-
-#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;
-
-%}
-
-%union {
- int Number;
- enum _MERIDIAN Meridian;
-}
-
-%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
-
-%%
-
-spec : /* NULL */
- | spec item
- ;
-
-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));
- }
- ;
-
-zone : tZONE {
- yyTimezone = $1;
- }
- | tDAYZONE {
- yyTimezone = $1 - 60;
- }
- |
- tZONE tDST {
- yyTimezone = $1 - 60;
- }
- ;
-
-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
- ;
-
-relunit : tUNUMBER tYEAR_UNIT {
- yyRelYear += $1 * $2;
- }
- | tSNUMBER tYEAR_UNIT {
- yyRelYear += $1 * $2;
- }
- | tYEAR_UNIT {
- yyRelYear++;
- }
- | tUNUMBER tMONTH_UNIT {
- yyRelMonth += $1 * $2;
- }
- | tSNUMBER tMONTH_UNIT {
- yyRelMonth += $1 * $2;
- }
- | tMONTH_UNIT {
- yyRelMonth++;
- }
- | tUNUMBER tDAY_UNIT {
- yyRelDay += $1 * $2;
- }
- | tSNUMBER tDAY_UNIT {
- yyRelDay += $1 * $2;
- }
- | tDAY_UNIT {
- yyRelDay++;
- }
- | tUNUMBER tHOUR_UNIT {
- yyRelHour += $1 * $2;
- }
- | tSNUMBER tHOUR_UNIT {
- yyRelHour += $1 * $2;
- }
- | tHOUR_UNIT {
- yyRelHour++;
- }
- | tUNUMBER tMINUTE_UNIT {
- yyRelMinutes += $1 * $2;
- }
- | tSNUMBER tMINUTE_UNIT {
- yyRelMinutes += $1 * $2;
- }
- | tMINUTE_UNIT {
- yyRelMinutes++;
- }
- | tUNUMBER tSEC_UNIT {
- yyRelSeconds += $1 * $2;
- }
- | tSNUMBER tSEC_UNIT {
- yyRelSeconds += $1 * $2;
- }
- | tSEC_UNIT {
- yyRelSeconds++;
- }
- ;
-
-number : tUNUMBER
- {
- if ((yyHaveTime != 0) && (yyHaveDate != 0) && (yyHaveRel == 0))
- yyYear = $1;
- else
- {
- if ($1>10000)
- {
- yyHaveDate++;
- yyDay= ($1)%100;
- yyMonth= ($1/100)%100;
- yyYear = $1/10000;
- }
- else
- {
- yyHaveTime++;
- if ($1 < 100)
- {
- yyHour = $1;
- yyMinutes = 0;
- }
- else
- {
- yyHour = $1 / 100;
- yyMinutes = $1 % 100;
- }
- yySeconds = 0;
- yyMeridian = MER24;
- }
- }
- }
- ;
-
-o_merid : /* NULL */
- {
- $$ = MER24;
- }
- | tMERIDIAN
- {
- $$ = $1;
- }
- ;
-
-%%
-
-/* 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 }
-};
-
-/* 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 }
-};
-
-/* 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, 2 },
- { "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 }
-};
-
-/* The timezone table. */
-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 */
- { "bst", tDAYZONE, HOUR ( 0) }, /* British Summer */
- { "wat", tZONE, HOUR ( 1) }, /* West Africa */
- { "at", tZONE, HOUR ( 2) }, /* Azores */
- { "ast", tZONE, HOUR ( 4) }, /* Atlantic Standard */
- { "adt", tDAYZONE, HOUR ( 4) }, /* Atlantic Daylight */
- { "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 */
- { "yst", tZONE, HOUR ( 9) }, /* Yukon Standard */
- { "ydt", tDAYZONE, HOUR ( 9) }, /* Yukon Daylight */
- { "hst", tZONE, HOUR (10) }, /* Hawaii Standard */
- { "hdt", tDAYZONE, HOUR (10) }, /* Hawaii Daylight */
- { "cat", tZONE, HOUR (10) }, /* Central Alaska */
- { "ahst", tZONE, HOUR (10) }, /* Alaska-Hawaii Standard */
- { "nt", tZONE, HOUR (11) }, /* Nome */
- { "idlw", tZONE, HOUR (12) }, /* International Date Line West */
- { "cet", tZONE, -HOUR (1) }, /* Central European */
- { "met", tZONE, -HOUR (1) }, /* Middle European */
- { "mewt", tZONE, -HOUR (1) }, /* Middle European Winter */
- { "mest", tDAYZONE, -HOUR (1) }, /* Middle European Summer */
- { "mesz", tDAYZONE, -HOUR (1) }, /* Middle European Summer */
- { "swt", tZONE, -HOUR (1) }, /* Swedish Winter */
- { "sst", tDAYZONE, -HOUR (1) }, /* Swedish Summer */
- { "fwt", tZONE, -HOUR (1) }, /* French Winter */
- { "fst", tDAYZONE, -HOUR (1) }, /* French Summer */
- { "eet", tZONE, -HOUR (2) }, /* Eastern Europe, USSR Zone 1 */
- { "bt", tZONE, -HOUR (3) }, /* Baghdad, USSR Zone 2 */
- { "zp4", tZONE, -HOUR (4) }, /* USSR Zone 3 */
- { "zp5", tZONE, -HOUR (5) }, /* USSR Zone 4 */
- { "zp6", tZONE, -HOUR (6) }, /* USSR Zone 5 */
- { "wast", tZONE, -HOUR (7) }, /* West Australian Standard */
- { "wadt", tDAYZONE, -HOUR (7) }, /* West Australian Daylight */
- { "cct", tZONE, -HOUR (8) }, /* China Coast, USSR Zone 7 */
- { "jst", tZONE, -HOUR (9) }, /* Japan Standard, USSR Zone 8 */
- { "east", tZONE, -HOUR (10) }, /* Eastern Australian Standard */
- { "eadt", tDAYZONE, -HOUR (10) }, /* Eastern Australian Daylight */
- { "gst", tZONE, -HOUR (10) }, /* Guam Standard, USSR Zone 9 */
- { "nzt", tZONE, -HOUR (12) }, /* New Zealand */
- { "nzst", tZONE, -HOUR (12) }, /* New Zealand Standard */
- { "nzdt", tDAYZONE, -HOUR (12) }, /* New Zealand Daylight */
- { "idle", tZONE, -HOUR (12) }, /* International Date Line East */
- { NULL, 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 }
-};
-
-
-
-
-static int yyerror (unused const char *s)
-{
- return 0;
-}
-
-static int ToHour (int Hours, MERIDIAN Meridian)
-{
- switch (Meridian)
- {
- case MER24:
- if (Hours < 0 || Hours > 23)
- return -1;
- return Hours;
- case MERam:
- if (Hours < 1 || Hours > 12)
- return -1;
- if (Hours == 12)
- Hours = 0;
- return Hours;
- case MERpm:
- if (Hours < 1 || Hours > 12)
- return -1;
- if (Hours == 12)
- Hours = 0;
- return Hours + 12;
- default:
- abort ();
- }
- /* NOTREACHED */
-}
-
-static int ToYear (int Year)
-{
- 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;
-
- return Year;
-}
-
-static int LookupWord (char *buff)
-{
- register char *p;
- register char *q;
- register const TABLE *tp;
- int i;
- bool abbrev;
-
- /* Make it lowercase. */
- for (p = buff; '\0' != *p; p++)
- if (isupper (*p))
- *p = tolower (*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;
- }
-
- /* See if we have an abbreviation for a month. */
- if (strlen (buff) == 3)
- abbrev = true;
- else if (strlen (buff) == 4 && buff[3] == '.')
- {
- abbrev = true;
- buff[3] = '\0';
- }
- else
- abbrev = false;
-
- 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 = TimezoneTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
-
- if (strcmp (buff, "dst") == 0)
- return tDST;
-
- for (tp = UnitsTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
-
- /* Strip off any plural and try the units table again. */
- i = strlen (buff) - 1;
- if (buff[i] == '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. */
- }
-
- for (tp = OtherTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
-
- /* Military timezones. */
- if (buff[1] == '\0' && isalpha (*buff))
- {
- for (tp = MilitaryTable; tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
- }
-
- /* Drop out any periods and try the timezone table again. */
- for (i = 0, p = q = buff; '\0' != *q; q++)
- if (*q != '.')
- *p++ = *q;
- else
- i++;
- *p = '\0';
- if (0 != i)
- for (tp = TimezoneTable; NULL != tp->name; tp++)
- if (strcmp (buff, tp->name) == 0)
- {
- yylval.Number = tp->value;
- return tp->type;
- }
-
- return tID;
-}
-
-static int
-yylex (void)
-{
- register char c;
- register char *p;
- char buff[20];
- int Count;
- int sign;
-
- for (;;)
- {
- while (isspace (*yyInput))
- yyInput++;
-
- if (isdigit (c = *yyInput) || c == '-' || c == '+')
- {
- if (c == '-' || c == '+')
- {
- sign = c == '-' ? -1 : 1;
- if (!isdigit (*++yyInput))
- /* 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;
- return (0 != sign) ? tSNUMBER : tUNUMBER;
- }
- if (isalpha (c))
- {
- for (p = buff; (c = *yyInput++, isalpha (c)) || c == '.';)
- if (p < &buff[sizeof buff - 1])
- *p++ = c;
- *p = '\0';
- yyInput--;
- return LookupWord (buff);
- }
- if (c != '(')
- return *yyInput++;
- Count = 0;
- do
- {
- c = *yyInput++;
- if (c == '\0')
- return c;
- if (c == '(')
- Count++;
- else if (c == ')')
- Count--;
- }
- while (Count > 0);
- }
-}
-
-#define TM_YEAR_ORIGIN 1900
-
-/* Yield A - B, measured in seconds. */
-static long difftm (struct tm *a, struct tm *b)
-{
- 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));
-}
-
-time_t get_date (const char *p, const time_t *now)
-{
- struct tm tm, tm0, *tmp;
- time_t Start;
-
- yyInput = p;
- Start = now ? *now : time ((time_t *) NULL);
- tmp = localtime (&Start);
- 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;
- 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)
- return -1;
-
- tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear;
- tm.tm_mon = yyMonth - 1 + yyRelMonth;
- tm.tm_mday = yyDay + yyRelDay;
- if ((yyHaveTime != 0) ||
- ( (yyHaveRel != 0) && (yyHaveDate == 0) && (yyHaveDay == 0) ))
- {
- tm.tm_hour = ToHour (yyHour, yyMeridian);
- if (tm.tm_hour < 0)
- return -1;
- tm.tm_min = yyMinutes;
- tm.tm_sec = yySeconds;
- }
- else
- {
- tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
- }
- tm.tm_hour += yyRelHour;
- tm.tm_min += yyRelMinutes;
- tm.tm_sec += yyRelSeconds;
- tm.tm_isdst = -1;
- 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 (yyHaveZone)
- {
- tm = tm0;
- if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN)
- {
- tm.tm_mday++;
- yyTimezone -= 24 * 60;
- }
- else
- {
- tm.tm_mday--;
- yyTimezone += 24 * 60;
- }
- Start = mktime (&tm);
- }
-
- if (Start == (time_t) -1)
- return Start;
- }
-
- if (yyHaveDay && !yyHaveDate)
- {
- tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7
- + 7 * (yyDayOrdinal - (0 < yyDayOrdinal)));
- Start = mktime (&tm);
- if (Start == (time_t) -1)
- return Start;
- }
-
- if (yyHaveZone)
- {
- long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start));
- if ((Start + delta < Start) != (delta < 0))
- return -1; /* time_t overflow */
- Start += delta;
- }
-
- return Start;
-}
-
-#if defined (TEST)
-
-/* ARGSUSED */
-int
-main (ac, av)
- int ac;
- char *av[];
-{
- char buff[MAX_BUFF_LEN + 1];
- time_t d;
-
- (void) printf ("Enter date, or blank line to exit.\n\t> ");
- (void) fflush (stdout);
-
- buff[MAX_BUFF_LEN] = 0;
- while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0])
- {
- d = get_date (buff, (time_t *) NULL);
- if (d == -1)
- (void) printf ("Bad format - couldn't convert.\n");
- else
- (void) printf ("%s", ctime (&d));
- (void) printf ("\t> ");
- (void) fflush (stdout);
- }
- exit (0);
- /* NOTREACHED */
-}
-#endif /* defined (TEST) */
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 07:45:36 +0000