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814 lines
21 KiB
814 lines
21 KiB
%{
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/* $Revision: 1.16 $
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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@osf.org> and Jim Berets <jberets@bbn.com> in August, 1990.
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** Further revised (removed obsolete constructs and cleaned up timezone
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** names) in August, 1991, by Rich. Paul Eggert <eggert@twinsun.com>
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** helped in September, 1992.
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**
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** This grammar has six 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 530 *//* Empty body for statement */
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/* SUPPRESS 593 on yyerrlab *//* Label was not used */
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/* SUPPRESS 593 on yynewstate *//* Label was not used */
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/* SUPPRESS 595 on yypvt *//* Automatic variable may be used before set */
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <ctype.h>
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#include <time.h>
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#include <string.h>
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int date_lex();
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#define yyparse date_parse
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#define yylex date_lex
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#define yyerror date_error
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/* See the LeapYears table in Convert. */
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#define EPOCH 1970
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#define END_OF_TIME 2038
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/* Constants for general time calculations. */
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#define DST_OFFSET 1
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#define SECSPERDAY (24L * 60L * 60L)
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/* Readability for TABLE stuff. */
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#define HOUR(x) (x * 60)
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#define LPAREN '('
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#define RPAREN ')'
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#define IS7BIT(x) ((unsigned int)(x) < 0200)
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#define SIZEOF(array) ((int)(sizeof array / sizeof array[0]))
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#define ENDOF(array) (&array[SIZEOF(array)])
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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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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 them by using a yacc
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** union, but this is more efficient. (This routine predates the
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** yacc %union construct.)
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*/
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static char *yyInput;
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static DSTMODE yyDSTmode;
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static int yyHaveDate;
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static int yyHaveRel;
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static int yyHaveTime;
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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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extern struct tm *localtime();
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static void date_error();
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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 tDAY tDAYZONE tMERIDIAN tMONTH tMONTH_UNIT tSEC_UNIT tSNUMBER
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%token tUNUMBER tZONE
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%type <Number> tDAYZONE tMONTH tMONTH_UNIT tSEC_UNIT
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%type <Number> tSNUMBER tUNUMBER tZONE numzone zone
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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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#ifdef lint
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/* I am compulsive about lint natterings... */
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if (yyHaveTime == -1) {
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YYERROR;
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}
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#endif /* lint */
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}
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| time zone {
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yyHaveTime++;
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yyTimezone = $2;
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}
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| date {
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yyHaveDate++;
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}
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| rel {
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yyHaveRel = 1;
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}
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;
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time : tUNUMBER o_merid {
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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 = $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 numzone {
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yyHour = $1;
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yyMinutes = $3;
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yyTimezone = $4;
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yyMeridian = MER24;
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yyDSTmode = DSToff;
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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 numzone {
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yyHour = $1;
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yyMinutes = $3;
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yySeconds = $5;
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yyTimezone = $6;
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yyMeridian = MER24;
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yyDSTmode = DSToff;
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}
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;
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zone : tZONE {
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$$ = $1;
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yyDSTmode = DSToff;
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}
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| tDAYZONE {
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$$ = $1;
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yyDSTmode = DSTon;
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}
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| tZONE numzone {
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/* Only allow "GMT+300" and "GMT-0800" */
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if ($1 != 0) {
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YYABORT;
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}
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$$ = $2;
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yyDSTmode = DSToff;
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}
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| numzone {
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$$ = $1;
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yyDSTmode = DSToff;
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}
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;
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numzone : tSNUMBER {
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int i;
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/* Unix and GMT and numeric timezones -- a little confusing. */
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if ($1 < 0) {
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/* Don't work with negative modulus. */
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$1 = -$1;
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if ($1 > 9999 || (i = $1 % 100) >= 60) {
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YYABORT;
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}
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$$ = ($1 / 100) * 60 + i;
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}
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else {
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if ($1 > 9999 || (i = $1 % 100) >= 60) {
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YYABORT;
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}
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$$ = -(($1 / 100) * 60 + i);
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}
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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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}
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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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| 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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yyDay = $1;
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yyMonth = $2;
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}
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| tUNUMBER tMONTH tUNUMBER {
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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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| tDAY ',' tUNUMBER tMONTH tUNUMBER {
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yyDay = $3;
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yyMonth = $4;
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yyYear = $5;
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}
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;
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rel : tSNUMBER tSEC_UNIT {
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yyRelSeconds += $1 * $2;
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}
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| tUNUMBER tSEC_UNIT {
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yyRelSeconds += $1 * $2;
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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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;
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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 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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{ "october", tMONTH, 10 },
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{ "november", tMONTH, 11 },
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{ "december", tMONTH, 12 },
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/* The value of the day isn't used... */
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{ "sunday", tDAY, 0 },
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{ "monday", tDAY, 0 },
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{ "tuesday", tDAY, 0 },
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{ "wednesday", tDAY, 0 },
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{ "thursday", tDAY, 0 },
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{ "friday", tDAY, 0 },
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{ "saturday", tDAY, 0 },
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};
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/* Time units table. */
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static TABLE UnitsTable[] = {
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{ "year", tMONTH_UNIT, 12 },
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{ "month", tMONTH_UNIT, 1 },
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{ "week", tSEC_UNIT, 7L * 24 * 60 * 60 },
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{ "day", tSEC_UNIT, 1L * 24 * 60 * 60 },
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{ "hour", tSEC_UNIT, 60 * 60 },
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{ "minute", tSEC_UNIT, 60 },
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{ "min", tSEC_UNIT, 60 },
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{ "second", tSEC_UNIT, 1 },
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{ "sec", tSEC_UNIT, 1 },
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};
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/* Timezone table. */
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static TABLE TimezoneTable[] = {
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{ "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */
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{ "ut", tZONE, HOUR( 0) }, /* Universal */
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{ "utc", tZONE, HOUR( 0) }, /* Universal Coordinated */
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{ "cut", tZONE, HOUR( 0) }, /* Coordinated Universal */
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{ "z", tZONE, HOUR( 0) }, /* Greenwich Mean */
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{ "wet", tZONE, HOUR( 0) }, /* Western European */
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{ "bst", tDAYZONE, HOUR( 0) }, /* British Summer */
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{ "nst", tZONE, HOUR(3)+30 }, /* Newfoundland Standard */
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{ "ndt", tDAYZONE, HOUR(3)+30 }, /* Newfoundland Daylight */
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{ "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */
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{ "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */
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{ "est", tZONE, HOUR( 5) }, /* Eastern Standard */
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{ "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */
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{ "cst", tZONE, HOUR( 6) }, /* Central Standard */
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{ "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */
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{ "mst", tZONE, HOUR( 7) }, /* Mountain Standard */
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{ "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */
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{ "pst", tZONE, HOUR( 8) }, /* Pacific Standard */
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{ "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */
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{ "yst", tZONE, HOUR( 9) }, /* Yukon Standard */
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{ "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */
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{ "akst", tZONE, HOUR( 9) }, /* Alaska Standard */
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{ "akdt", tDAYZONE, HOUR( 9) }, /* Alaska Daylight */
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{ "hst", tZONE, HOUR(10) }, /* Hawaii Standard */
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{ "hast", tZONE, HOUR(10) }, /* Hawaii-Aleutian Standard */
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{ "hadt", tDAYZONE, HOUR(10) }, /* Hawaii-Aleutian Daylight */
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{ "ces", tDAYZONE, -HOUR(1) }, /* Central European Summer */
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{ "cest", tDAYZONE, -HOUR(1) }, /* Central European Summer */
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{ "mez", tZONE, -HOUR(1) }, /* Middle European */
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{ "mezt", tDAYZONE, -HOUR(1) }, /* Middle European Summer */
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{ "cet", tZONE, -HOUR(1) }, /* Central European */
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{ "met", tZONE, -HOUR(1) }, /* Middle European */
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{ "eet", tZONE, -HOUR(2) }, /* Eastern Europe */
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{ "msk", tZONE, -HOUR(3) }, /* Moscow Winter */
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{ "msd", tDAYZONE, -HOUR(3) }, /* Moscow Summer */
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{ "wast", tZONE, -HOUR(8) }, /* West Australian Standard */
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{ "wadt", tDAYZONE, -HOUR(8) }, /* West Australian Daylight */
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{ "hkt", tZONE, -HOUR(8) }, /* Hong Kong */
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{ "cct", tZONE, -HOUR(8) }, /* China Coast */
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{ "jst", tZONE, -HOUR(9) }, /* Japan Standard */
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{ "kst", tZONE, -HOUR(9) }, /* Korean Standard */
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{ "kdt", tZONE, -HOUR(9) }, /* Korean Daylight */
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{ "cast", tZONE, -(HOUR(9)+30) }, /* Central Australian Standard */
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{ "cadt", tDAYZONE, -(HOUR(9)+30) }, /* Central Australian Daylight */
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{ "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */
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{ "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */
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{ "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */
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{ "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */
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/* For completeness we include the following entries. */
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#if 0
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/* Duplicate names. Either they conflict with a zone listed above
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* (which is either more likely to be seen or just been in circulation
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* longer), or they conflict with another zone in this section and
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* we could not reasonably choose one over the other. */
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{ "fst", tZONE, HOUR( 2) }, /* Fernando De Noronha Standard */
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{ "fdt", tDAYZONE, HOUR( 2) }, /* Fernando De Noronha Daylight */
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{ "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
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{ "est", tZONE, HOUR( 3) }, /* Eastern Standard (Brazil) */
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{ "edt", tDAYZONE, HOUR( 3) }, /* Eastern Daylight (Brazil) */
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{ "wst", tZONE, HOUR( 4) }, /* Western Standard (Brazil) */
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{ "wdt", tDAYZONE, HOUR( 4) }, /* Western Daylight (Brazil) */
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{ "cst", tZONE, HOUR( 5) }, /* Chile Standard */
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{ "cdt", tDAYZONE, HOUR( 5) }, /* Chile Daylight */
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{ "ast", tZONE, HOUR( 5) }, /* Acre Standard */
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{ "adt", tDAYZONE, HOUR( 5) }, /* Acre Daylight */
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{ "cst", tZONE, HOUR( 5) }, /* Cuba Standard */
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{ "cdt", tDAYZONE, HOUR( 5) }, /* Cuba Daylight */
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{ "est", tZONE, HOUR( 6) }, /* Easter Island Standard */
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{ "edt", tDAYZONE, HOUR( 6) }, /* Easter Island Daylight */
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{ "sst", tZONE, HOUR(11) }, /* Samoa Standard */
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{ "ist", tZONE, -HOUR(2) }, /* Israel Standard */
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{ "idt", tDAYZONE, -HOUR(2) }, /* Israel Daylight */
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{ "idt", tDAYZONE, -(HOUR(3)+30) }, /* Iran Daylight */
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{ "ist", tZONE, -(HOUR(3)+30) }, /* Iran Standard */
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{ "cst", tZONE, -HOUR(8) }, /* China Standard */
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{ "cdt", tDAYZONE, -HOUR(8) }, /* China Daylight */
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{ "sst", tZONE, -HOUR(8) }, /* Singapore Standard */
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/* Dubious (e.g., not in Olson's TIMEZONE package) or obsolete. */
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{ "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
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{ "wat", tZONE, -HOUR(1) }, /* West Africa */
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{ "at", tZONE, HOUR( 2) }, /* Azores */
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{ "gst", tZONE, -HOUR(10) }, /* Guam Standard */
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{ "nft", tZONE, HOUR(3)+30 }, /* Newfoundland */
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{ "idlw", tZONE, HOUR(12) }, /* International Date Line West */
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{ "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */
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{ "mest", tDAYZONE, -HOUR(1) }, /* Middle European Summer */
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{ "swt", tZONE, -HOUR(1) }, /* Swedish Winter */
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{ "sst", tDAYZONE, -HOUR(1) }, /* Swedish Summer */
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{ "fwt", tZONE, -HOUR(1) }, /* French Winter */
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{ "fst", tDAYZONE, -HOUR(1) }, /* French Summer */
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{ "bt", tZONE, -HOUR(3) }, /* Baghdad */
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{ "it", tZONE, -(HOUR(3)+30) }, /* Iran */
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{ "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */
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{ "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */
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{ "ist", tZONE, -(HOUR(5)+30) }, /* Indian Standard */
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{ "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */
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{ "nst", tZONE, -HOUR(7) }, /* North Sumatra */
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{ "sst", tZONE, -HOUR(7) }, /* South Sumatra */
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{ "jt", tZONE, -(HOUR(7)+30) }, /* Java (3pm in Cronusland!) */
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{ "nzt", tZONE, -HOUR(12) }, /* New Zealand */
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{ "idle", tZONE, -HOUR(12) }, /* International Date Line East */
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{ "cat", tZONE, HOUR(10) }, /* -- expired 1967 */
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{ "nt", tZONE, HOUR(11) }, /* -- expired 1967 */
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{ "ahst", tZONE, HOUR(10) }, /* -- expired 1983 */
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{ "hdt", tDAYZONE, HOUR(10) }, /* -- expired 1986 */
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#endif /* 0 */
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};
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/* ARGSUSED */
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static void
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date_error(s)
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char *s;
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{
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/* NOTREACHED */
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}
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|
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static time_t
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ToSeconds(Hours, Minutes, Seconds, Meridian)
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time_t Hours;
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time_t Minutes;
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time_t Seconds;
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MERIDIAN Meridian;
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{
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if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 61)
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return -1;
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if (Meridian == MER24) {
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if (Hours < 0 || Hours > 23)
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return -1;
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}
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else {
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if (Hours < 1 || Hours > 12)
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return -1;
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if (Hours == 12)
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Hours = 0;
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|
if (Meridian == MERpm)
|
|
Hours += 12;
|
|
}
|
|
return (Hours * 60L + Minutes) * 60L + Seconds;
|
|
}
|
|
|
|
|
|
static time_t
|
|
Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, dst)
|
|
time_t Month;
|
|
time_t Day;
|
|
time_t Year;
|
|
time_t Hours;
|
|
time_t Minutes;
|
|
time_t Seconds;
|
|
MERIDIAN Meridian;
|
|
DSTMODE dst;
|
|
{
|
|
static int DaysNormal[13] = {
|
|
0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
|
|
};
|
|
static int DaysLeap[13] = {
|
|
0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
|
|
};
|
|
static int LeapYears[] = {
|
|
1972, 1976, 1980, 1984, 1988, 1992, 1996,
|
|
2000, 2004, 2008, 2012, 2016, 2020, 2024, 2028, 2032, 2036
|
|
};
|
|
register int *yp;
|
|
register int *mp;
|
|
register time_t Julian;
|
|
register int i;
|
|
time_t tod;
|
|
|
|
if (Year < 0)
|
|
Year = -Year;
|
|
if (Year < 100)
|
|
Year += 1900;
|
|
if (Year < EPOCH)
|
|
Year += 100;
|
|
for (mp = DaysNormal, yp = LeapYears; yp < ENDOF(LeapYears); yp++)
|
|
if (Year == *yp) {
|
|
mp = DaysLeap;
|
|
break;
|
|
}
|
|
if (Year < EPOCH || Year > END_OF_TIME
|
|
|| Month < 1 || Month > 12
|
|
/* NOSTRICT *//* conversion from long may lose accuracy */
|
|
|| Day < 1 || Day > mp[(int)Month])
|
|
return -1;
|
|
|
|
Julian = Day - 1 + (Year - EPOCH) * 365;
|
|
for (yp = LeapYears; yp < ENDOF(LeapYears); yp++, Julian++)
|
|
if (Year <= *yp)
|
|
break;
|
|
for (i = 1; i < Month; i++)
|
|
Julian += *++mp;
|
|
Julian *= SECSPERDAY;
|
|
Julian += yyTimezone * 60L;
|
|
if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
|
|
return -1;
|
|
Julian += tod;
|
|
tod = Julian;
|
|
if (dst == DSTon || (dst == DSTmaybe && localtime(&tod)->tm_isdst))
|
|
Julian -= DST_OFFSET * 60L * 60L;
|
|
return Julian;
|
|
}
|
|
|
|
|
|
static time_t
|
|
DSTcorrect(Start, Future)
|
|
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) * DST_OFFSET * 60L * 60L;
|
|
}
|
|
|
|
|
|
static time_t
|
|
RelativeMonth(Start, RelMonth)
|
|
time_t Start;
|
|
time_t RelMonth;
|
|
{
|
|
struct tm *tm;
|
|
time_t Month;
|
|
time_t Year;
|
|
|
|
tm = localtime(&Start);
|
|
Month = 12 * tm->tm_year + 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(buff, length)
|
|
char *buff;
|
|
register int length;
|
|
{
|
|
register char *p;
|
|
register char *q;
|
|
register TABLE *tp;
|
|
register int c;
|
|
|
|
p = buff;
|
|
c = p[0];
|
|
|
|
/* See if we have an abbreviation for a month. */
|
|
if (length == 3 || (length == 4 && p[3] == '.'))
|
|
for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++) {
|
|
q = tp->name;
|
|
if (c == q[0] && p[1] == q[1] && p[2] == q[2]) {
|
|
yylval.Number = tp->value;
|
|
return tp->type;
|
|
}
|
|
}
|
|
else
|
|
for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++)
|
|
if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
|
|
yylval.Number = tp->value;
|
|
return tp->type;
|
|
}
|
|
|
|
/* Try for a timezone. */
|
|
for (tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++)
|
|
if (c == tp->name[0] && p[1] == tp->name[1]
|
|
&& strcmp(p, tp->name) == 0) {
|
|
yylval.Number = tp->value;
|
|
return tp->type;
|
|
}
|
|
|
|
/* Try the units table. */
|
|
for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++)
|
|
if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
|
|
yylval.Number = tp->value;
|
|
return tp->type;
|
|
}
|
|
|
|
/* Strip off any plural and try the units table again. */
|
|
if (--length > 0 && p[length] == 's') {
|
|
p[length] = '\0';
|
|
for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++)
|
|
if (c == tp->name[0] && strcmp(p, tp->name) == 0) {
|
|
p[length] = 's';
|
|
yylval.Number = tp->value;
|
|
return tp->type;
|
|
}
|
|
p[length] = 's';
|
|
}
|
|
length++;
|
|
|
|
/* Drop out any periods. */
|
|
for (p = buff, q = (char*)buff; *q; q++)
|
|
if (*q != '.')
|
|
*p++ = *q;
|
|
*p = '\0';
|
|
|
|
/* Try the meridians. */
|
|
if (buff[1] == 'm' && buff[2] == '\0') {
|
|
if (buff[0] == 'a') {
|
|
yylval.Meridian = MERam;
|
|
return tMERIDIAN;
|
|
}
|
|
if (buff[0] == 'p') {
|
|
yylval.Meridian = MERpm;
|
|
return tMERIDIAN;
|
|
}
|
|
}
|
|
|
|
/* If we saw any periods, try the timezones again. */
|
|
if (p - buff != length) {
|
|
c = buff[0];
|
|
for (p = buff, tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++)
|
|
if (c == tp->name[0] && p[1] == tp->name[1]
|
|
&& strcmp(p, tp->name) == 0) {
|
|
yylval.Number = tp->value;
|
|
return tp->type;
|
|
}
|
|
}
|
|
|
|
/* Unknown word -- assume GMT timezone. */
|
|
yylval.Number = 0;
|
|
return tZONE;
|
|
}
|
|
|
|
|
|
int
|
|
date_lex()
|
|
{
|
|
register char c;
|
|
register char *p;
|
|
char buff[20];
|
|
register int sign;
|
|
register int i;
|
|
register int nesting;
|
|
|
|
for ( ; ; ) {
|
|
/* Get first character after the whitespace. */
|
|
for ( ; ; ) {
|
|
while (isspace(*yyInput))
|
|
yyInput++;
|
|
c = *yyInput;
|
|
|
|
/* Ignore RFC 822 comments, typically time zone names. */
|
|
if (c != LPAREN)
|
|
break;
|
|
for (nesting = 1; (c = *++yyInput) != RPAREN || --nesting; )
|
|
if (c == LPAREN)
|
|
nesting++;
|
|
else if (!IS7BIT(c) || c == '\0' || c == '\r'
|
|
|| (c == '\\' && ((c = *++yyInput) == '\0' || !IS7BIT(c))))
|
|
/* Lexical error: bad comment. */
|
|
return '?';
|
|
yyInput++;
|
|
}
|
|
|
|
/* A number? */
|
|
if (isdigit(c) || c == '-' || c == '+') {
|
|
if (c == '-' || c == '+') {
|
|
sign = c == '-' ? -1 : 1;
|
|
yyInput++;
|
|
if (!isdigit(*yyInput))
|
|
/* Skip the plus or minus sign. */
|
|
continue;
|
|
}
|
|
else
|
|
sign = 0;
|
|
for (i = 0; (c = *yyInput++) != '\0' && isdigit(c); )
|
|
i = 10 * i + c - '0';
|
|
yyInput--;
|
|
yylval.Number = sign < 0 ? -i : i;
|
|
return sign ? tSNUMBER : tUNUMBER;
|
|
}
|
|
|
|
/* A word? */
|
|
if (isalpha(c)) {
|
|
for (p = buff; (c = *yyInput++) == '.' || isalpha(c); )
|
|
if (p < &buff[sizeof buff - 1])
|
|
*p++ = isupper(c) ? tolower(c) : c;
|
|
*p = '\0';
|
|
yyInput--;
|
|
return LookupWord(buff, p - buff);
|
|
}
|
|
|
|
return *yyInput++;
|
|
}
|
|
}
|
|
|
|
|
|
time_t
|
|
parsedate(p)
|
|
char *p;
|
|
{
|
|
extern int date_parse();
|
|
time_t Start;
|
|
|
|
yyInput = p;
|
|
|
|
yyYear = 0;
|
|
yyMonth = 0;
|
|
yyDay = 0;
|
|
yyTimezone = 0;
|
|
yyDSTmode = DSTmaybe;
|
|
yyHour = 0;
|
|
yyMinutes = 0;
|
|
yySeconds = 0;
|
|
yyMeridian = MER24;
|
|
yyRelSeconds = 0;
|
|
yyRelMonth = 0;
|
|
yyHaveDate = 0;
|
|
yyHaveRel = 0;
|
|
yyHaveTime = 0;
|
|
|
|
if (date_parse() || yyHaveTime > 1 || yyHaveDate > 1)
|
|
return -1;
|
|
|
|
if (yyHaveDate || yyHaveTime) {
|
|
Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
|
|
yyMeridian, yyDSTmode);
|
|
if (Start < 0)
|
|
return -1;
|
|
}
|
|
else
|
|
return -1;
|
|
|
|
Start += yyRelSeconds;
|
|
if (yyRelMonth)
|
|
Start += RelativeMonth(Start, yyRelMonth);
|
|
|
|
/* 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;
|
|
}
|
|
|
|
|
|
#ifdef TEST
|
|
|
|
#if YYDEBUG
|
|
extern int yydebug;
|
|
#endif /* YYDEBUG */
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
main(ac, av)
|
|
int ac;
|
|
char *av[];
|
|
{
|
|
char buff[128];
|
|
time_t d;
|
|
|
|
#if YYDEBUG
|
|
yydebug = 1;
|
|
#endif /* YYDEBUG */
|
|
|
|
(void)printf("Enter date, or blank line to exit.\n\t> ");
|
|
for ( ; ; ) {
|
|
(void)printf("\t> ");
|
|
(void)fflush(stdout);
|
|
if (gets(buff) == NULL || buff[0] == '\n')
|
|
break;
|
|
#if YYDEBUG
|
|
if (strcmp(buff, "yydebug") == 0) {
|
|
yydebug = !yydebug;
|
|
printf("yydebug = %s\n", yydebug ? "on" : "off");
|
|
continue;
|
|
}
|
|
#endif /* YYDEBUG */
|
|
d = parsedate(buff, (TIMEINFO *)NULL);
|
|
if (d == -1)
|
|
(void)printf("Bad format - couldn't convert.\n");
|
|
else
|
|
(void)printf("%s", ctime(&d));
|
|
}
|
|
|
|
exit(0);
|
|
/* NOTREACHED */
|
|
}
|
|
#endif /* TEST */
|