2005-03-13 18:36:24 +00:00
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%{
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/*
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** Originally written by Steven M. Bellovin <smb@research.att.com> while
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** at the University of North Carolina at Chapel Hill. Later tweaked by
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** a couple of people on Usenet. Completely overhauled by Rich $alz
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** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
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**
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** This grammar has 10 shift/reduce conflicts.
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**
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** This code is in the public domain and has no copyright.
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*/
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/* SUPPRESS 287 on yaccpar_sccsid *//* Unused static variable */
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/* SUPPRESS 288 on yyerrlab *//* Label unused */
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#include "bsdtar_platform.h"
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2005-03-13 19:44:19 +00:00
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__FBSDID("$FreeBSD$");
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2005-03-13 18:36:24 +00:00
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#include <ctype.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#define yyparse getdate_yyparse
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#define yylex getdate_yylex
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#define yyerror getdate_yyerror
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2005-03-13 21:36:15 +00:00
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static int yyparse(void);
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2005-03-13 18:36:24 +00:00
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static int yylex(void);
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static int yyerror(const char *);
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time_t get_date(char *);
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#define EPOCH 1970
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#define HOUR(x) ((time_t)(x) * 60)
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#define SECSPERDAY (24L * 60L * 60L)
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/*
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** An entry in the lexical lookup table.
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*/
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typedef struct _TABLE {
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const char *name;
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int type;
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time_t value;
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} TABLE;
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/*
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** Daylight-savings mode: on, off, or not yet known.
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*/
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typedef enum _DSTMODE {
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DSTon, DSToff, DSTmaybe
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} DSTMODE;
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/*
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** Meridian: am, pm, or 24-hour style.
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*/
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typedef enum _MERIDIAN {
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MERam, MERpm, MER24
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} MERIDIAN;
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/*
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** Global variables. We could get rid of most of these by using a good
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** union as the yacc stack. (This routine was originally written before
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** yacc had the %union construct.) Maybe someday; right now we only use
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** the %union very rarely.
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*/
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static char *yyInput;
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static DSTMODE yyDSTmode;
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static time_t yyDayOrdinal;
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static time_t yyDayNumber;
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static int yyHaveDate;
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static int yyHaveDay;
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static int yyHaveRel;
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static int yyHaveTime;
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static int yyHaveZone;
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static time_t yyTimezone;
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static time_t yyDay;
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static time_t yyHour;
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static time_t yyMinutes;
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static time_t yyMonth;
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static time_t yySeconds;
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static time_t yyYear;
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static MERIDIAN yyMeridian;
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static time_t yyRelMonth;
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static time_t yyRelSeconds;
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%}
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%union {
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time_t Number;
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enum _MERIDIAN Meridian;
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}
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%token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
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%token tSEC_UNIT tSNUMBER tUNUMBER tZONE tDST
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%type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT
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%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE
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%type <Meridian> tMERIDIAN o_merid
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%%
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spec : /* NULL */
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| spec item
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;
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item : time {
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yyHaveTime++;
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}
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| zone {
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yyHaveZone++;
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}
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| date {
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yyHaveDate++;
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}
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| day {
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yyHaveDay++;
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}
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| rel {
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yyHaveRel++;
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}
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;
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time : tUNUMBER tMERIDIAN {
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yyHour = $1;
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yyMinutes = 0;
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yySeconds = 0;
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yyMeridian = $2;
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}
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| tUNUMBER ':' tUNUMBER o_merid {
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yyHour = $1;
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yyMinutes = $3;
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yySeconds = 0;
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yyMeridian = $4;
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}
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| tUNUMBER ':' tUNUMBER tSNUMBER {
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yyHour = $1;
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yyMinutes = $3;
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yyMeridian = MER24;
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yyDSTmode = DSToff;
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yyTimezone = - ($4 % 100 + ($4 / 100) * 60);
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}
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| tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
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yyHour = $1;
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yyMinutes = $3;
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yySeconds = $5;
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yyMeridian = $6;
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}
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| tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
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yyHour = $1;
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yyMinutes = $3;
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yySeconds = $5;
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yyMeridian = MER24;
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yyDSTmode = DSToff;
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yyTimezone = - ($6 % 100 + ($6 / 100) * 60);
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}
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;
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zone : tZONE {
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yyTimezone = $1;
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yyDSTmode = DSToff;
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}
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| tDAYZONE {
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yyTimezone = $1;
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yyDSTmode = DSTon;
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}
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tZONE tDST {
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yyTimezone = $1;
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yyDSTmode = DSTon;
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}
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;
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day : tDAY {
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yyDayOrdinal = 1;
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yyDayNumber = $1;
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}
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| tDAY ',' {
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yyDayOrdinal = 1;
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yyDayNumber = $1;
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}
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| tUNUMBER tDAY {
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yyDayOrdinal = $1;
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yyDayNumber = $2;
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}
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;
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date : tUNUMBER '/' tUNUMBER {
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yyMonth = $1;
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yyDay = $3;
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}
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| tUNUMBER '/' tUNUMBER '/' tUNUMBER {
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if ($1 >= 13) {
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/* First number is big: 2004/01/29, 99/02/17 */
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yyYear = $1;
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yyMonth = $3;
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yyDay = $5;
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} else if (($5 >= 13) || ($3 >= 13)) {
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/* Last number is big: 01/07/98 */
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/* Middle number is big: 01/29/04 */
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yyMonth = $1;
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yyDay = $3;
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yyYear = $5;
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} else {
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/* No significant clues: 02/03/04 */
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yyMonth = $1;
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yyDay = $3;
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yyYear = $5;
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}
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}
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| tUNUMBER tSNUMBER tSNUMBER {
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/* ISO 8601 format. yyyy-mm-dd. */
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yyYear = $1;
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yyMonth = -$2;
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yyDay = -$3;
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}
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| tUNUMBER tMONTH tSNUMBER {
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/* e.g. 17-JUN-1992. */
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yyDay = $1;
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yyMonth = $2;
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yyYear = -$3;
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}
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| tMONTH tUNUMBER {
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yyMonth = $1;
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yyDay = $2;
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}
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| tMONTH tUNUMBER ',' tUNUMBER {
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yyMonth = $1;
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yyDay = $2;
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yyYear = $4;
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}
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| tUNUMBER tMONTH {
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yyMonth = $2;
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yyDay = $1;
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}
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| tUNUMBER tMONTH tUNUMBER {
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yyMonth = $2;
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yyDay = $1;
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yyYear = $3;
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}
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;
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rel : relunit tAGO {
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yyRelSeconds = -yyRelSeconds;
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yyRelMonth = -yyRelMonth;
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}
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| relunit
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;
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relunit : tUNUMBER tMINUTE_UNIT {
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yyRelSeconds += $1 * $2 * 60L;
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}
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| tSNUMBER tMINUTE_UNIT {
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yyRelSeconds += $1 * $2 * 60L;
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}
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| tMINUTE_UNIT {
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yyRelSeconds += $1 * 60L;
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}
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| tSNUMBER tSEC_UNIT {
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yyRelSeconds += $1;
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}
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| tUNUMBER tSEC_UNIT {
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yyRelSeconds += $1;
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}
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| tSEC_UNIT {
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yyRelSeconds++;
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}
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| tSNUMBER tMONTH_UNIT {
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yyRelMonth += $1 * $2;
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}
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| tUNUMBER tMONTH_UNIT {
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yyRelMonth += $1 * $2;
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}
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| tMONTH_UNIT {
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yyRelMonth += $1;
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}
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;
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number : tUNUMBER {
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if (yyHaveTime && yyHaveDate && !yyHaveRel)
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yyYear = $1;
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else {
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if($1>10000) {
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yyHaveDate++;
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yyDay= ($1)%100;
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yyMonth= ($1/100)%100;
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yyYear = $1/10000;
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}
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else {
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yyHaveTime++;
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if ($1 < 100) {
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yyHour = $1;
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yyMinutes = 0;
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}
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else {
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yyHour = $1 / 100;
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yyMinutes = $1 % 100;
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}
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yySeconds = 0;
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yyMeridian = MER24;
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}
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}
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}
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;
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o_merid : /* NULL */ {
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$$ = MER24;
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}
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|
|
|
|
| tMERIDIAN {
|
|
|
|
|
|
$$ = $1;
|
|
|
|
|
|
}
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|
|
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|
|
;
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|
%%
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|
|
|
/* Month and day table. */
|
|
|
|
|
|
static TABLE const MonthDayTable[] = {
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|
|
{ "january", tMONTH, 1 },
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|
{ "february", tMONTH, 2 },
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|
|
{ "march", tMONTH, 3 },
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|
{ "april", tMONTH, 4 },
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|
{ "may", tMONTH, 5 },
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|
{ "june", tMONTH, 6 },
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|
{ "july", tMONTH, 7 },
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|
{ "august", tMONTH, 8 },
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|
{ "september", tMONTH, 9 },
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|
{ "sept", tMONTH, 9 },
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|
|
{ "october", tMONTH, 10 },
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|
{ "november", tMONTH, 11 },
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|
|
{ "december", tMONTH, 12 },
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|
|
{ "sunday", tDAY, 0 },
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|
{ "monday", tDAY, 1 },
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|
{ "tuesday", tDAY, 2 },
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|
{ "tues", tDAY, 2 },
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|
{ "wednesday", tDAY, 3 },
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|
|
{ "wednes", tDAY, 3 },
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|
{ "thursday", tDAY, 4 },
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|
|
{ "thur", tDAY, 4 },
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|
|
{ "thurs", tDAY, 4 },
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|
|
{ "friday", tDAY, 5 },
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|
{ "saturday", tDAY, 6 },
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|
|
{ NULL, 0, 0 }
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|
|
|
|
|
};
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|
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|
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|
|
/* Time units table. */
|
|
|
|
|
|
static TABLE const UnitsTable[] = {
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|
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|
|
{ "year", tMONTH_UNIT, 12 },
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|
|
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|
|
{ "month", tMONTH_UNIT, 1 },
|
|
|
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|
|
{ "fortnight", tMINUTE_UNIT, 14 * 24 * 60 },
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|
|
{ "week", tMINUTE_UNIT, 7 * 24 * 60 },
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|
|
{ "day", tMINUTE_UNIT, 1 * 24 * 60 },
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|
|
{ "hour", tMINUTE_UNIT, 60 },
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|
|
{ "minute", tMINUTE_UNIT, 1 },
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|
|
{ "min", tMINUTE_UNIT, 1 },
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|
|
{ "second", tSEC_UNIT, 1 },
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|
|
|
|
{ "sec", tSEC_UNIT, 1 },
|
|
|
|
|
|
{ NULL, 0, 0 }
|
|
|
|
|
|
};
|
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|
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|
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|
|
/* Assorted relative-time words. */
|
|
|
|
|
|
static TABLE const OtherTable[] = {
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|
|
|
|
{ "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
|
|
|
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|
|
{ "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
|
|
|
|
|
|
{ "today", tMINUTE_UNIT, 0 },
|
|
|
|
|
|
{ "now", tMINUTE_UNIT, 0 },
|
|
|
|
|
|
{ "last", tUNUMBER, -1 },
|
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|
|
{ "this", tMINUTE_UNIT, 0 },
|
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|
|
{ "next", tUNUMBER, 2 },
|
|
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|
|
{ "first", tUNUMBER, 1 },
|
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|
|
/* { "second", tUNUMBER, 2 }, */
|
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|
|
{ "third", tUNUMBER, 3 },
|
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|
|
{ "fourth", tUNUMBER, 4 },
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|
|
{ "fifth", tUNUMBER, 5 },
|
|
|
|
|
|
{ "sixth", tUNUMBER, 6 },
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|
|
{ "seventh", tUNUMBER, 7 },
|
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|
|
{ "eighth", tUNUMBER, 8 },
|
|
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|
|
{ "ninth", tUNUMBER, 9 },
|
|
|
|
|
|
{ "tenth", tUNUMBER, 10 },
|
|
|
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|
|
{ "eleventh", tUNUMBER, 11 },
|
|
|
|
|
|
{ "twelfth", tUNUMBER, 12 },
|
|
|
|
|
|
{ "ago", tAGO, 1 },
|
|
|
|
|
|
{ NULL, 0, 0 }
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* The timezone table. */
|
|
|
|
|
|
/* Some of these are commented out because a time_t can't store a float. */
|
|
|
|
|
|
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 */
|
|
|
|
|
|
#if 0
|
|
|
|
|
|
/* For completeness. BST is also British Summer, and GST is
|
|
|
|
|
|
* also Guam Standard. */
|
|
|
|
|
|
{ "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
|
|
|
|
|
|
{ "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
|
|
|
|
|
|
#endif
|
|
|
|
|
|
{ "nft", tZONE, HOUR(3)+30 }, /* Newfoundland */
|
|
|
|
|
|
{ "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 */
|
|
|
|
|
|
{ "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 */
|
|
|
|
|
|
{ "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 */
|
|
|
|
|
|
{ "it", tZONE, -HOUR(3)-30 },/* Iran */
|
|
|
|
|
|
{ "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */
|
|
|
|
|
|
{ "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */
|
|
|
|
|
|
{ "ist", tZONE, -HOUR(5)-30 },/* Indian Standard */
|
|
|
|
|
|
{ "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */
|
|
|
|
|
|
#if 0
|
|
|
|
|
|
/* For completeness. NST is also Newfoundland Stanard, and SST is
|
|
|
|
|
|
* also Swedish Summer. */
|
|
|
|
|
|
{ "nst", tZONE, -HOUR(6.5) },/* North Sumatra */
|
|
|
|
|
|
{ "sst", tZONE, -HOUR(7) }, /* South Sumatra, USSR Zone 6 */
|
|
|
|
|
|
#endif /* 0 */
|
|
|
|
|
|
{ "wast", tZONE, -HOUR(7) }, /* West Australian Standard */
|
|
|
|
|
|
{ "wadt", tDAYZONE, -HOUR(7) }, /* West Australian Daylight */
|
|
|
|
|
|
{ "jt", tZONE, -HOUR(7)-30 },/* Java (3pm in Cronusland!) */
|
|
|
|
|
|
{ "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */
|
|
|
|
|
|
{ "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */
|
|
|
|
|
|
{ "cast", tZONE, -HOUR(9)-30 },/* Central Australian Standard */
|
|
|
|
|
|
{ "cadt", tDAYZONE, -HOUR(9)-30 },/* Central Australian Daylight */
|
|
|
|
|
|
{ "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 }
|
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* ARGSUSED */
|
|
|
|
|
|
static int
|
|
|
|
|
|
yyerror(const char *s __unused)
|
|
|
|
|
|
{
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static time_t
|
|
|
|
|
|
ToSeconds(time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian)
|
|
|
|
|
|
{
|
|
|
|
|
|
if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
switch (Meridian) {
|
|
|
|
|
|
case MER24:
|
|
|
|
|
|
if (Hours < 0 || Hours > 23)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
return (Hours * 60L + Minutes) * 60L + Seconds;
|
|
|
|
|
|
case MERam:
|
|
|
|
|
|
if (Hours < 1 || Hours > 12)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
if (Hours == 12)
|
|
|
|
|
|
Hours = 0;
|
|
|
|
|
|
return (Hours * 60L + Minutes) * 60L + Seconds;
|
|
|
|
|
|
case MERpm:
|
|
|
|
|
|
if (Hours < 1 || Hours > 12)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
if (Hours == 12)
|
|
|
|
|
|
Hours = 0;
|
|
|
|
|
|
return ((Hours + 12) * 60L + Minutes) * 60L + Seconds;
|
|
|
|
|
|
default:
|
|
|
|
|
|
abort ();
|
|
|
|
|
|
}
|
|
|
|
|
|
/* NOTREACHED */
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Year is either
|
|
|
|
|
|
* A negative number, which means to use its absolute value (why?)
|
|
|
|
|
|
* A number from 0 to 99, which means a year from 1970 to 2069, or
|
|
|
|
|
|
* The actual year (>=100). */
|
|
|
|
|
|
static time_t
|
|
|
|
|
|
Convert(time_t Month, time_t Day, time_t Year,
|
|
|
|
|
|
time_t Hours, time_t Minutes, time_t Seconds,
|
|
|
|
|
|
MERIDIAN Meridian, DSTMODE DSTmode)
|
|
|
|
|
|
{
|
|
|
|
|
|
static int DaysInMonth[12] = {
|
|
|
|
|
|
31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
|
|
|
|
|
|
};
|
|
|
|
|
|
time_t tod;
|
|
|
|
|
|
time_t Julian;
|
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
|
|
if (Year < 0)
|
|
|
|
|
|
Year = -Year;
|
|
|
|
|
|
if (Year < 69)
|
|
|
|
|
|
Year += 2000;
|
|
|
|
|
|
else if (Year < 100)
|
|
|
|
|
|
Year += 1900;
|
|
|
|
|
|
DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
|
|
|
|
|
|
? 29 : 28;
|
|
|
|
|
|
/* Checking for 2038 bogusly assumes that time_t is 32 bits. But
|
|
|
|
|
|
I'm too lazy to try to check for time_t overflow in another way. */
|
|
|
|
|
|
if (Year < EPOCH || Year > 2038
|
|
|
|
|
|
|| Month < 1 || Month > 12
|
|
|
|
|
|
/* Lint fluff: "conversion from long may lose accuracy" */
|
|
|
|
|
|
|| Day < 1 || Day > DaysInMonth[(int)--Month])
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
|
|
for (Julian = Day - 1, i = 0; i < Month; i++)
|
|
|
|
|
|
Julian += DaysInMonth[i];
|
|
|
|
|
|
for (i = EPOCH; i < Year; i++)
|
|
|
|
|
|
Julian += 365 + (i % 4 == 0);
|
|
|
|
|
|
Julian *= SECSPERDAY;
|
|
|
|
|
|
Julian += yyTimezone * 60L;
|
|
|
|
|
|
if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
Julian += tod;
|
|
|
|
|
|
if (DSTmode == DSTon
|
|
|
|
|
|
|| (DSTmode == DSTmaybe && localtime(&Julian)->tm_isdst))
|
|
|
|
|
|
Julian -= 60 * 60;
|
|
|
|
|
|
return Julian;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static time_t
|
|
|
|
|
|
DSTcorrect(time_t Start, time_t Future)
|
|
|
|
|
|
{
|
|
|
|
|
|
time_t StartDay;
|
|
|
|
|
|
time_t FutureDay;
|
|
|
|
|
|
|
|
|
|
|
|
StartDay = (localtime(&Start)->tm_hour + 1) % 24;
|
|
|
|
|
|
FutureDay = (localtime(&Future)->tm_hour + 1) % 24;
|
|
|
|
|
|
return (Future - Start) + (StartDay - FutureDay) * 60L * 60L;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static time_t
|
|
|
|
|
|
RelativeDate(time_t Start, time_t DayOrdinal, time_t DayNumber)
|
|
|
|
|
|
{
|
|
|
|
|
|
struct tm *tm;
|
|
|
|
|
|
time_t now;
|
|
|
|
|
|
|
|
|
|
|
|
now = Start;
|
|
|
|
|
|
tm = localtime(&now);
|
|
|
|
|
|
now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7);
|
|
|
|
|
|
now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1);
|
|
|
|
|
|
return DSTcorrect(Start, now);
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static time_t
|
|
|
|
|
|
RelativeMonth(time_t Start, time_t RelMonth)
|
|
|
|
|
|
{
|
|
|
|
|
|
struct tm *tm;
|
|
|
|
|
|
time_t Month;
|
|
|
|
|
|
time_t Year;
|
|
|
|
|
|
|
|
|
|
|
|
if (RelMonth == 0)
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
tm = localtime(&Start);
|
|
|
|
|
|
Month = 12 * (tm->tm_year + 1900) + tm->tm_mon + RelMonth;
|
|
|
|
|
|
Year = Month / 12;
|
|
|
|
|
|
Month = Month % 12 + 1;
|
|
|
|
|
|
return DSTcorrect(Start,
|
|
|
|
|
|
Convert(Month, (time_t)tm->tm_mday, Year,
|
|
|
|
|
|
(time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec,
|
|
|
|
|
|
MER24, DSTmaybe));
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
|
LookupWord(char *buff)
|
|
|
|
|
|
{
|
|
|
|
|
|
char *p;
|
|
|
|
|
|
char *q;
|
|
|
|
|
|
const TABLE *tp;
|
|
|
|
|
|
int i;
|
|
|
|
|
|
int abbrev;
|
|
|
|
|
|
|
|
|
|
|
|
/* Make it lowercase. */
|
|
|
|
|
|
for (p = buff; *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 = 1;
|
|
|
|
|
|
else if (strlen(buff) == 4 && buff[3] == '.') {
|
|
|
|
|
|
abbrev = 1;
|
|
|
|
|
|
buff[3] = '\0';
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
abbrev = 0;
|
|
|
|
|
|
|
|
|
|
|
|
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; *q; q++)
|
|
|
|
|
|
if (*q != '.')
|
|
|
|
|
|
*p++ = *q;
|
|
|
|
|
|
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;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
return tID;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
|
yylex(void)
|
|
|
|
|
|
{
|
|
|
|
|
|
char c;
|
|
|
|
|
|
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 sign ? tSNUMBER : tUNUMBER;
|
|
|
|
|
|
}
|
|
|
|
|
|
if (isalpha(c)) {
|
|
|
|
|
|
for (p = buff; isalpha(c = *yyInput++) || 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);
|
|
|
|
|
|
int 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(char *p)
|
|
|
|
|
|
{
|
|
|
|
|
|
struct tm *tm, gmt;
|
|
|
|
|
|
time_t Start;
|
|
|
|
|
|
time_t tod;
|
|
|
|
|
|
time_t nowtime;
|
|
|
|
|
|
long tzone;
|
|
|
|
|
|
|
|
|
|
|
|
yyInput = p;
|
|
|
|
|
|
|
|
|
|
|
|
struct tm *gmt_ptr;
|
|
|
|
|
|
|
|
|
|
|
|
(void)time (&nowtime);
|
|
|
|
|
|
|
|
|
|
|
|
gmt_ptr = gmtime (&nowtime);
|
|
|
|
|
|
if (gmt_ptr != NULL)
|
|
|
|
|
|
{
|
|
|
|
|
|
/* Make a copy, in case localtime modifies *tm (I think
|
|
|
|
|
|
that comment now applies to *gmt_ptr, but I am too
|
|
|
|
|
|
lazy to dig into how gmtime and locatime allocate the
|
|
|
|
|
|
structures they return pointers to). */
|
|
|
|
|
|
gmt = *gmt_ptr;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
if (! (tm = localtime (&nowtime)))
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
|
|
if (gmt_ptr != NULL)
|
|
|
|
|
|
tzone = difftm (&gmt, tm) / 60;
|
|
|
|
|
|
else
|
|
|
|
|
|
/* We are on a system like VMS, where the system clock is
|
|
|
|
|
|
in local time and the system has no concept of timezones.
|
|
|
|
|
|
Hopefully we can fake this out (for the case in which the
|
|
|
|
|
|
user specifies no timezone) by just saying the timezone
|
|
|
|
|
|
is zero. */
|
|
|
|
|
|
tzone = 0;
|
|
|
|
|
|
|
|
|
|
|
|
if(tm->tm_isdst)
|
|
|
|
|
|
tzone += 60;
|
|
|
|
|
|
|
|
|
|
|
|
tm = localtime(&nowtime);
|
|
|
|
|
|
yyYear = tm->tm_year + 1900;
|
|
|
|
|
|
yyMonth = tm->tm_mon + 1;
|
|
|
|
|
|
yyDay = tm->tm_mday;
|
|
|
|
|
|
yyTimezone = tzone;
|
|
|
|
|
|
yyDSTmode = DSTmaybe;
|
|
|
|
|
|
yyHour = 0;
|
|
|
|
|
|
yyMinutes = 0;
|
|
|
|
|
|
yySeconds = 0;
|
|
|
|
|
|
yyMeridian = MER24;
|
|
|
|
|
|
yyRelSeconds = 0;
|
|
|
|
|
|
yyRelMonth = 0;
|
|
|
|
|
|
yyHaveDate = 0;
|
|
|
|
|
|
yyHaveDay = 0;
|
|
|
|
|
|
yyHaveRel = 0;
|
|
|
|
|
|
yyHaveTime = 0;
|
|
|
|
|
|
yyHaveZone = 0;
|
|
|
|
|
|
|
|
|
|
|
|
if (yyparse()
|
|
|
|
|
|
|| yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
|
|
|
|
if (yyHaveDate || yyHaveTime || yyHaveDay) {
|
|
|
|
|
|
Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
|
|
|
|
|
|
yyMeridian, yyDSTmode);
|
|
|
|
|
|
if (Start < 0)
|
|
|
|
|
|
return -1;
|
|
|
|
|
|
}
|
|
|
|
|
|
else {
|
|
|
|
|
|
Start = nowtime;
|
|
|
|
|
|
if (!yyHaveRel)
|
|
|
|
|
|
Start -= ((tm->tm_hour * 60L + tm->tm_min) * 60L) + tm->tm_sec;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
Start += yyRelSeconds;
|
|
|
|
|
|
Start += RelativeMonth(Start, yyRelMonth);
|
|
|
|
|
|
|
|
|
|
|
|
if (yyHaveDay && !yyHaveDate) {
|
|
|
|
|
|
tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber);
|
|
|
|
|
|
Start += tod;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Have to do *something* with a legitimate -1 so it's distinguishable
|
|
|
|
|
|
* from the error return value. (Alternately could set errno on error.) */
|
|
|
|
|
|
return Start == -1 ? 0 : Start;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#if defined(TEST)
|
|
|
|
|
|
|
|
|
|
|
|
/* ARGSUSED */
|
|
|
|
|
|
int
|
|
|
|
|
|
main(int ac, char *av[])
|
|
|
|
|
|
{
|
|
|
|
|
|
char buff[128];
|
|
|
|
|
|
time_t d;
|
|
|
|
|
|
|
|
|
|
|
|
(void)printf("Enter date, or blank line to exit.\n\t> ");
|
|
|
|
|
|
(void)fflush(stdout);
|
|
|
|
|
|
while (gets(buff) && buff[0]) {
|
|
|
|
|
|
d = get_date(buff, (struct timeb *)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) */
|
