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https://git.FreeBSD.org/src.git
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662cb04c25
Quoth the man-page:
Fifologs provide a compact round-robin circular storage for recording
text and binary information to permanent storage in a bounded and pre-
dictable fashion, time and space wise.
Not yet connected to the build, but feel free to test & review.
890 lines
21 KiB
Plaintext
890 lines
21 KiB
Plaintext
%{
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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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** Picked up from CVS and slightly cleaned up by to WARNS=5 level by
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** Poul-Henning Kamp <phk@FreeBSD.org>
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**
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** $FreeBSD$
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include "libfifolog.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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static int yyparse(void);
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static int yylex(void);
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static int yyerror(const 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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/*
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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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DSToff, DSTon, DSTmaybe
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} DSTMODE;
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||
|
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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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||
*/
|
||
static char *yyInput;
|
||
static DSTMODE yyDSTmode;
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||
static time_t yyDayOrdinal;
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||
static time_t yyDayNumber;
|
||
static int yyHaveDate;
|
||
static int yyHaveDay;
|
||
static int yyHaveRel;
|
||
static int yyHaveTime;
|
||
static int yyHaveZone;
|
||
static time_t yyTimezone;
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||
static time_t yyDay;
|
||
static time_t yyHour;
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||
static time_t yyMinutes;
|
||
static time_t yyMonth;
|
||
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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%}
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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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|
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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 {
|
||
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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| cvsstamp {
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yyHaveTime++;
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yyHaveDate++;
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yyHaveZone++;
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}
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| number
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;
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||
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cvsstamp: tUNUMBER '.' tUNUMBER '.' tUNUMBER '.' tUNUMBER '.' tUNUMBER '.' tUNUMBER {
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yyYear = $1;
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if (yyYear < 100) yyYear += 1900;
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yyMonth = $3;
|
||
yyDay = $5;
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||
yyHour = $7;
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yyMinutes = $9;
|
||
yySeconds = $11;
|
||
yyDSTmode = DSToff;
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||
yyTimezone = 0;
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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;
|
||
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;
|
||
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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|
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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 >= 100) {
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yyYear = $1;
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yyMonth = $3;
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yyDay = $5;
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} else {
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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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||
}
|
||
else {
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yyHour = $1 / 100;
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||
yyMinutes = $1 % 100;
|
||
}
|
||
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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$$ = MER24;
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}
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| tMERIDIAN {
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$$ = $1;
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}
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;
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%%
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/* Month and day table. */
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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 },
|
||
{ "friday", tDAY, 5 },
|
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{ "saturday", tDAY, 6 },
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{ NULL, 0, 0 }
|
||
};
|
||
|
||
/* Time units table. */
|
||
static TABLE const UnitsTable[] = {
|
||
{ "year", tMONTH_UNIT, 12 },
|
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{ "month", tMONTH_UNIT, 1 },
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{ "fortnight", tMINUTE_UNIT, 14 * 24 * 60 },
|
||
{ "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 },
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{ NULL, 0, 0 }
|
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};
|
||
|
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/* Assorted relative-time words. */
|
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static TABLE const OtherTable[] = {
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{ "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
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{ "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
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{ "today", tMINUTE_UNIT, 0 },
|
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{ "now", tMINUTE_UNIT, 0 },
|
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{ "last", tUNUMBER, -1 },
|
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{ "this", tMINUTE_UNIT, 0 },
|
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{ "next", tUNUMBER, 2 },
|
||
{ "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 },
|
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{ "sixth", tUNUMBER, 6 },
|
||
{ "seventh", tUNUMBER, 7 },
|
||
{ "eighth", tUNUMBER, 8 },
|
||
{ "ninth", tUNUMBER, 9 },
|
||
{ "tenth", tUNUMBER, 10 },
|
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{ "eleventh", tUNUMBER, 11 },
|
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{ "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
|
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/* For completeness. BST is also British Summer, and GST is
|
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* also Guam Standard. */
|
||
{ "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
|
||
{ "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
|
||
#endif
|
||
#if 0
|
||
{ "nft", tZONE, HOUR(3.5) }, /* Newfoundland */
|
||
{ "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */
|
||
{ "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */
|
||
#endif
|
||
{ "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 */
|
||
#if 0
|
||
{ "it", tZONE, -HOUR(3.5) },/* Iran */
|
||
#endif
|
||
{ "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */
|
||
{ "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */
|
||
#if 0
|
||
{ "ist", tZONE, -HOUR(5.5) },/* Indian Standard */
|
||
#endif
|
||
{ "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 */
|
||
#if 0
|
||
{ "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */
|
||
#endif
|
||
{ "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */
|
||
{ "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */
|
||
#if 0
|
||
{ "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */
|
||
{ "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */
|
||
#endif
|
||
{ "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 1900 to 1999, 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;
|
||
struct tm *ltm;
|
||
|
||
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])
|
||
/* FIXME:
|
||
* It would be nice to set a global error string here.
|
||
* "February 30 is not a valid date" is much more informative than
|
||
* "Can't parse date/time: 100 months" when the user input was
|
||
* "100 months" and addition resolved that to February 30, for
|
||
* example. See rcs2-7 in src/sanity.sh for more. */
|
||
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;
|
||
ltm = localtime(&Julian);
|
||
fprintf(stderr, "DST %d TZ %s %d\n", DSTmode, ltm->tm_zone, ltm->tm_isdst);
|
||
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()
|
||
{
|
||
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
|
||
|
||
time_t
|
||
get_date(char *p)
|
||
{
|
||
struct tm *tm, gmt;
|
||
time_t Start;
|
||
time_t tod;
|
||
time_t nowtime;
|
||
struct tm *gmt_ptr;
|
||
|
||
yyInput = p;
|
||
|
||
(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;
|
||
|
||
tm = localtime(&nowtime);
|
||
yyYear = tm->tm_year + 1900;
|
||
yyMonth = tm->tm_mon + 1;
|
||
yyDay = tm->tm_mday;
|
||
yyTimezone = tm->tm_gmtoff;
|
||
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;
|
||
}
|