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%{ |
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/* $OpenBSD: date.y,v 1.14 2016/08/26 09:02:54 guenther Exp $ */ |
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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 <ctype.h> |
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#include <err.h> |
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#include <string.h> |
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#include <time.h> |
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#include "rcsprog.h" |
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#define YEAR_EPOCH 1970 |
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#define YEAR_TMORIGIN 1900 |
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#define HOUR(x) ((time_t)(x) * 60) |
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#define SECSPERDAY (24L * 60L * 60L) |
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/* An entry in the lexical lookup table */ |
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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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/* Daylight-savings mode: on, off, or not yet known. */ |
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typedef enum _DSTMODE { |
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DSTon, DSToff, DSTmaybe |
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} DSTMODE; |
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/* Meridian: am, pm, or 24-hour style. */ |
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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 const 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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static int yyerror(const char *); |
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static int yylex(void); |
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static int yyparse(void); |
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static int lookup(char *); |
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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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| number |
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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 >= 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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} 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; |
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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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$$ = MER24; |
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} |
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| tMERIDIAN { |
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$$ = $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 }, |
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{ "friday", tDAY, 5 }, |
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{ "saturday", tDAY, 6 }, |
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{ NULL } |
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}; |
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/* Time units table. */ |
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static TABLE const UnitsTable[] = { |
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{ "year", tMONTH_UNIT, 12 }, |
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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 }, |
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{ NULL } |
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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 }, |
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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 }, |
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{ "sixth", tUNUMBER, 6 }, |
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{ "seventh", tUNUMBER, 7 }, |
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{ "eighth", tUNUMBER, 8 }, |
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{ "ninth", tUNUMBER, 9 }, |
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{ "tenth", tUNUMBER, 10 }, |
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{ "eleventh", tUNUMBER, 11 }, |
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{ "twelfth", tUNUMBER, 12 }, |
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{ "ago", tAGO, 1 }, |
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{ NULL } |
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}; |
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369 |
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/* The timezone table. */ |
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/* Some of these are commented out because a time_t can't store a float. */ |
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static TABLE const TimezoneTable[] = { |
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{ "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */ |
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{ "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */ |
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{ "utc", tZONE, HOUR( 0) }, |
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{ "wet", tZONE, HOUR( 0) }, /* Western European */ |
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{ "bst", tDAYZONE, HOUR( 0) }, /* British Summer */ |
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{ "wat", tZONE, HOUR( 1) }, /* West Africa */ |
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{ "at", tZONE, HOUR( 2) }, /* Azores */ |
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#if 0 |
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/* For completeness. BST is also British Summer, and GST is |
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* also Guam Standard. */ |
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{ "bst", tZONE, HOUR( 3) }, /* Brazil Standard */ |
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{ "gst", tZONE, HOUR( 3) }, /* Greenland Standard */ |
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#endif |
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#if 0 |
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{ "nft", tZONE, HOUR(3.5) }, /* Newfoundland */ |
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{ "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */ |
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{ "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */ |
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#endif |
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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 */ |
397 |
|
|
{ "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */ |
398 |
|
|
{ "pst", tZONE, HOUR( 8) }, /* Pacific Standard */ |
399 |
|
|
{ "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */ |
400 |
|
|
{ "yst", tZONE, HOUR( 9) }, /* Yukon Standard */ |
401 |
|
|
{ "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */ |
402 |
|
|
{ "hst", tZONE, HOUR(10) }, /* Hawaii Standard */ |
403 |
|
|
{ "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */ |
404 |
|
|
{ "cat", tZONE, HOUR(10) }, /* Central Alaska */ |
405 |
|
|
{ "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */ |
406 |
|
|
{ "nt", tZONE, HOUR(11) }, /* Nome */ |
407 |
|
|
{ "idlw", tZONE, HOUR(12) }, /* International Date Line West */ |
408 |
|
|
{ "cet", tZONE, -HOUR(1) }, /* Central European */ |
409 |
|
|
{ "met", tZONE, -HOUR(1) }, /* Middle European */ |
410 |
|
|
{ "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */ |
411 |
|
|
{ "mest", tDAYZONE, -HOUR(1) }, /* Middle European Summer */ |
412 |
|
|
{ "swt", tZONE, -HOUR(1) }, /* Swedish Winter */ |
413 |
|
|
{ "sst", tDAYZONE, -HOUR(1) }, /* Swedish Summer */ |
414 |
|
|
{ "fwt", tZONE, -HOUR(1) }, /* French Winter */ |
415 |
|
|
{ "fst", tDAYZONE, -HOUR(1) }, /* French Summer */ |
416 |
|
|
{ "eet", tZONE, -HOUR(2) }, /* Eastern Europe, USSR Zone 1 */ |
417 |
|
|
{ "bt", tZONE, -HOUR(3) }, /* Baghdad, USSR Zone 2 */ |
418 |
|
|
#if 0 |
419 |
|
|
{ "it", tZONE, -HOUR(3.5) },/* Iran */ |
420 |
|
|
#endif |
421 |
|
|
{ "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */ |
422 |
|
|
{ "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */ |
423 |
|
|
#if 0 |
424 |
|
|
{ "ist", tZONE, -HOUR(5.5) },/* Indian Standard */ |
425 |
|
|
#endif |
426 |
|
|
{ "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */ |
427 |
|
|
#if 0 |
428 |
|
|
/* For completeness. NST is also Newfoundland Stanard, and SST is |
429 |
|
|
* also Swedish Summer. */ |
430 |
|
|
{ "nst", tZONE, -HOUR(6.5) },/* North Sumatra */ |
431 |
|
|
{ "sst", tZONE, -HOUR(7) }, /* South Sumatra, USSR Zone 6 */ |
432 |
|
|
#endif /* 0 */ |
433 |
|
|
{ "wast", tZONE, -HOUR(7) }, /* West Australian Standard */ |
434 |
|
|
{ "wadt", tDAYZONE, -HOUR(7) }, /* West Australian Daylight */ |
435 |
|
|
#if 0 |
436 |
|
|
{ "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */ |
437 |
|
|
#endif |
438 |
|
|
{ "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */ |
439 |
|
|
{ "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */ |
440 |
|
|
#if 0 |
441 |
|
|
{ "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */ |
442 |
|
|
{ "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */ |
443 |
|
|
#endif |
444 |
|
|
{ "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */ |
445 |
|
|
{ "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */ |
446 |
|
|
{ "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */ |
447 |
|
|
{ "nzt", tZONE, -HOUR(12) }, /* New Zealand */ |
448 |
|
|
{ "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */ |
449 |
|
|
{ "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */ |
450 |
|
|
{ "idle", tZONE, -HOUR(12) }, /* International Date Line East */ |
451 |
|
|
{ NULL } |
452 |
|
|
}; |
453 |
|
|
|
454 |
|
|
/* Military timezone table. */ |
455 |
|
|
static TABLE const MilitaryTable[] = { |
456 |
|
|
{ "a", tZONE, HOUR( 1) }, |
457 |
|
|
{ "b", tZONE, HOUR( 2) }, |
458 |
|
|
{ "c", tZONE, HOUR( 3) }, |
459 |
|
|
{ "d", tZONE, HOUR( 4) }, |
460 |
|
|
{ "e", tZONE, HOUR( 5) }, |
461 |
|
|
{ "f", tZONE, HOUR( 6) }, |
462 |
|
|
{ "g", tZONE, HOUR( 7) }, |
463 |
|
|
{ "h", tZONE, HOUR( 8) }, |
464 |
|
|
{ "i", tZONE, HOUR( 9) }, |
465 |
|
|
{ "k", tZONE, HOUR( 10) }, |
466 |
|
|
{ "l", tZONE, HOUR( 11) }, |
467 |
|
|
{ "m", tZONE, HOUR( 12) }, |
468 |
|
|
{ "n", tZONE, HOUR(- 1) }, |
469 |
|
|
{ "o", tZONE, HOUR(- 2) }, |
470 |
|
|
{ "p", tZONE, HOUR(- 3) }, |
471 |
|
|
{ "q", tZONE, HOUR(- 4) }, |
472 |
|
|
{ "r", tZONE, HOUR(- 5) }, |
473 |
|
|
{ "s", tZONE, HOUR(- 6) }, |
474 |
|
|
{ "t", tZONE, HOUR(- 7) }, |
475 |
|
|
{ "u", tZONE, HOUR(- 8) }, |
476 |
|
|
{ "v", tZONE, HOUR(- 9) }, |
477 |
|
|
{ "w", tZONE, HOUR(-10) }, |
478 |
|
|
{ "x", tZONE, HOUR(-11) }, |
479 |
|
|
{ "y", tZONE, HOUR(-12) }, |
480 |
|
|
{ "z", tZONE, HOUR( 0) }, |
481 |
|
|
{ NULL } |
482 |
|
|
}; |
483 |
|
|
|
484 |
|
|
|
485 |
|
|
static int |
486 |
|
|
yyerror(const char *s) |
487 |
|
|
{ |
488 |
|
|
char *str; |
489 |
|
|
|
490 |
|
|
if (isspace(yyInput[0]) || !isprint(yyInput[0])) |
491 |
|
|
(void)xasprintf(&str, |
492 |
|
|
"%s: unexpected char 0x%02x in date string", s, yyInput[0]); |
493 |
|
|
else |
494 |
|
|
(void)xasprintf(&str, "%s: unexpected %s in date string", |
495 |
|
|
s, yyInput); |
496 |
|
|
|
497 |
|
|
warnx("%s", str); |
498 |
|
|
free(str); |
499 |
|
|
return (0); |
500 |
|
|
} |
501 |
|
|
|
502 |
|
|
|
503 |
|
|
static time_t |
504 |
|
|
ToSeconds(time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian) |
505 |
|
|
{ |
506 |
✗✓ |
8 |
if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) |
507 |
|
|
return (-1); |
508 |
|
|
|
509 |
✓✗✗✗
|
4 |
switch (Meridian) { |
510 |
|
|
case MER24: |
511 |
✗✓ |
4 |
if (Hours < 0 || Hours > 23) |
512 |
|
|
return (-1); |
513 |
|
4 |
return (Hours * 60L + Minutes) * 60L + Seconds; |
514 |
|
|
case MERam: |
515 |
|
|
if (Hours < 1 || Hours > 12) |
516 |
|
|
return (-1); |
517 |
|
|
if (Hours == 12) |
518 |
|
|
Hours = 0; |
519 |
|
|
return (Hours * 60L + Minutes) * 60L + Seconds; |
520 |
|
|
case MERpm: |
521 |
|
|
if (Hours < 1 || Hours > 12) |
522 |
|
|
return (-1); |
523 |
|
|
if (Hours == 12) |
524 |
|
|
Hours = 0; |
525 |
|
|
return ((Hours + 12) * 60L + Minutes) * 60L + Seconds; |
526 |
|
|
default: |
527 |
|
|
return (-1); |
528 |
|
|
} |
529 |
|
|
/* NOTREACHED */ |
530 |
|
4 |
} |
531 |
|
|
|
532 |
|
|
|
533 |
|
|
/* Year is either |
534 |
|
|
* A negative number, which means to use its absolute value (why?) |
535 |
|
|
* A number from 0 to 99, which means a year from 1900 to 1999, or |
536 |
|
|
* The actual year (>=100). |
537 |
|
|
*/ |
538 |
|
|
static time_t |
539 |
|
|
Convert(time_t Month, time_t Day, time_t Year, time_t Hours, time_t Minutes, |
540 |
|
|
time_t Seconds, MERIDIAN Meridian, DSTMODE DSTmode) |
541 |
|
|
{ |
542 |
|
|
static int DaysInMonth[12] = { |
543 |
|
|
31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 |
544 |
|
|
}; |
545 |
|
|
time_t tod; |
546 |
|
8 |
time_t julian; |
547 |
|
|
int i; |
548 |
|
|
|
549 |
✗✓ |
4 |
if (Year < 0) |
550 |
|
|
Year = -Year; |
551 |
✗✓ |
4 |
if (Year < 69) |
552 |
|
|
Year += 2000; |
553 |
✗✓ |
4 |
else if (Year < 100) { |
554 |
|
|
Year += 1900; |
555 |
|
|
if (Year < YEAR_EPOCH) |
556 |
|
|
Year += 100; |
557 |
|
|
} |
558 |
✗✓✗✗
|
8 |
DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) |
559 |
|
|
? 29 : 28; |
560 |
|
|
/* XXX Sloppily check for 2038 if time_t is 32 bits */ |
561 |
✗✓ |
8 |
if (Year < YEAR_EPOCH || |
562 |
✓✗ |
12 |
(sizeof(time_t) == sizeof(int) && Year > 2038) || |
563 |
|
8 |
Month < 1 || Month > 12 || |
564 |
|
|
/* Lint fluff: "conversion from long may lose accuracy" */ |
565 |
|
8 |
Day < 1 || Day > DaysInMonth[(int)--Month]) |
566 |
|
|
return (-1); |
567 |
|
|
|
568 |
✗✓ |
8 |
for (julian = Day - 1, i = 0; i < Month; i++) |
569 |
|
|
julian += DaysInMonth[i]; |
570 |
|
|
|
571 |
✓✓ |
326 |
for (i = YEAR_EPOCH; i < Year; i++) |
572 |
|
159 |
julian += 365 + (i % 4 == 0); |
573 |
|
4 |
julian *= SECSPERDAY; |
574 |
|
4 |
julian += yyTimezone * 60L; |
575 |
|
|
|
576 |
✗✓ |
4 |
if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0) |
577 |
|
|
return (-1); |
578 |
|
4 |
julian += tod; |
579 |
✓✗✗✗
|
4 |
if ((DSTmode == DSTon) || |
580 |
✗✓ |
4 |
(DSTmode == DSTmaybe && localtime(&julian)->tm_isdst)) |
581 |
|
|
julian -= 60 * 60; |
582 |
|
4 |
return (julian); |
583 |
|
4 |
} |
584 |
|
|
|
585 |
|
|
|
586 |
|
|
static time_t |
587 |
|
|
DSTcorrect(time_t Start, time_t Future) |
588 |
|
|
{ |
589 |
|
|
time_t StartDay; |
590 |
|
|
time_t FutureDay; |
591 |
|
|
|
592 |
|
|
StartDay = (localtime(&Start)->tm_hour + 1) % 24; |
593 |
|
|
FutureDay = (localtime(&Future)->tm_hour + 1) % 24; |
594 |
|
|
return (Future - Start) + (StartDay - FutureDay) * 60L * 60L; |
595 |
|
|
} |
596 |
|
|
|
597 |
|
|
|
598 |
|
|
static time_t |
599 |
|
|
RelativeDate(time_t Start, time_t DayOrdinal, time_t DayNumber) |
600 |
|
|
{ |
601 |
|
|
struct tm *tm; |
602 |
|
|
time_t now; |
603 |
|
|
|
604 |
|
|
now = Start; |
605 |
|
|
tm = localtime(&now); |
606 |
|
|
now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7); |
607 |
|
|
now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1); |
608 |
|
|
return DSTcorrect(Start, now); |
609 |
|
|
} |
610 |
|
|
|
611 |
|
|
|
612 |
|
|
static time_t |
613 |
|
|
RelativeMonth(time_t Start, time_t RelMonth) |
614 |
|
|
{ |
615 |
|
|
struct tm *tm; |
616 |
|
|
time_t Month; |
617 |
|
|
time_t Year; |
618 |
|
|
|
619 |
✓✗ |
4 |
if (RelMonth == 0) |
620 |
|
4 |
return (0); |
621 |
|
|
tm = localtime(&Start); |
622 |
|
|
Month = 12 * (tm->tm_year + 1900) + tm->tm_mon + RelMonth; |
623 |
|
|
Year = Month / 12; |
624 |
|
|
Month = Month % 12 + 1; |
625 |
|
|
return DSTcorrect(Start, |
626 |
|
|
Convert(Month, (time_t)tm->tm_mday, Year, |
627 |
|
|
(time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec, |
628 |
|
|
MER24, DSTmaybe)); |
629 |
|
4 |
} |
630 |
|
|
|
631 |
|
|
|
632 |
|
|
static int |
633 |
|
|
lookup(char *buff) |
634 |
|
|
{ |
635 |
|
|
size_t len; |
636 |
|
|
char *p, *q; |
637 |
|
|
int i, abbrev; |
638 |
|
|
const TABLE *tp; |
639 |
|
|
|
640 |
|
|
/* Make it lowercase. */ |
641 |
|
|
for (p = buff; *p; p++) |
642 |
|
|
if (isupper(*p)) |
643 |
|
|
*p = tolower(*p); |
644 |
|
|
|
645 |
|
|
if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) { |
646 |
|
|
yylval.Meridian = MERam; |
647 |
|
|
return (tMERIDIAN); |
648 |
|
|
} |
649 |
|
|
if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) { |
650 |
|
|
yylval.Meridian = MERpm; |
651 |
|
|
return (tMERIDIAN); |
652 |
|
|
} |
653 |
|
|
|
654 |
|
|
len = strlen(buff); |
655 |
|
|
/* See if we have an abbreviation for a month. */ |
656 |
|
|
if (len == 3) |
657 |
|
|
abbrev = 1; |
658 |
|
|
else if (len == 4 && buff[3] == '.') { |
659 |
|
|
abbrev = 1; |
660 |
|
|
buff[3] = '\0'; |
661 |
|
|
--len; |
662 |
|
|
} else |
663 |
|
|
abbrev = 0; |
664 |
|
|
|
665 |
|
|
for (tp = MonthDayTable; tp->name; tp++) { |
666 |
|
|
if (abbrev) { |
667 |
|
|
if (strncmp(buff, tp->name, 3) == 0) { |
668 |
|
|
yylval.Number = tp->value; |
669 |
|
|
return (tp->type); |
670 |
|
|
} |
671 |
|
|
} else if (strcmp(buff, tp->name) == 0) { |
672 |
|
|
yylval.Number = tp->value; |
673 |
|
|
return (tp->type); |
674 |
|
|
} |
675 |
|
|
} |
676 |
|
|
|
677 |
|
|
for (tp = TimezoneTable; tp->name; tp++) |
678 |
|
|
if (strcmp(buff, tp->name) == 0) { |
679 |
|
|
yylval.Number = tp->value; |
680 |
|
|
return (tp->type); |
681 |
|
|
} |
682 |
|
|
|
683 |
|
|
if (strcmp(buff, "dst") == 0) |
684 |
|
|
return (tDST); |
685 |
|
|
|
686 |
|
|
for (tp = UnitsTable; tp->name; tp++) |
687 |
|
|
if (strcmp(buff, tp->name) == 0) { |
688 |
|
|
yylval.Number = tp->value; |
689 |
|
|
return (tp->type); |
690 |
|
|
} |
691 |
|
|
|
692 |
|
|
/* Strip off any plural and try the units table again. */ |
693 |
|
|
if (len != 0 && buff[len - 1] == 's') { |
694 |
|
|
buff[len - 1] = '\0'; |
695 |
|
|
for (tp = UnitsTable; tp->name; tp++) |
696 |
|
|
if (strcmp(buff, tp->name) == 0) { |
697 |
|
|
yylval.Number = tp->value; |
698 |
|
|
return (tp->type); |
699 |
|
|
} |
700 |
|
|
buff[len - 1] = 's'; /* Put back for "this" in OtherTable. */ |
701 |
|
|
} |
702 |
|
|
|
703 |
|
|
for (tp = OtherTable; tp->name; tp++) |
704 |
|
|
if (strcmp(buff, tp->name) == 0) { |
705 |
|
|
yylval.Number = tp->value; |
706 |
|
|
return (tp->type); |
707 |
|
|
} |
708 |
|
|
|
709 |
|
|
/* Military timezones. */ |
710 |
|
|
if (len == 1 && isalpha(*buff)) { |
711 |
|
|
for (tp = MilitaryTable; tp->name; tp++) |
712 |
|
|
if (strcmp(buff, tp->name) == 0) { |
713 |
|
|
yylval.Number = tp->value; |
714 |
|
|
return (tp->type); |
715 |
|
|
} |
716 |
|
|
} |
717 |
|
|
|
718 |
|
|
/* Drop out any periods and try the timezone table again. */ |
719 |
|
|
for (i = 0, p = q = buff; *q; q++) |
720 |
|
|
if (*q != '.') |
721 |
|
|
*p++ = *q; |
722 |
|
|
else |
723 |
|
|
i++; |
724 |
|
|
*p = '\0'; |
725 |
|
|
if (i) |
726 |
|
|
for (tp = TimezoneTable; tp->name; tp++) |
727 |
|
|
if (strcmp(buff, tp->name) == 0) { |
728 |
|
|
yylval.Number = tp->value; |
729 |
|
|
return (tp->type); |
730 |
|
|
} |
731 |
|
|
|
732 |
|
|
return (tID); |
733 |
|
|
} |
734 |
|
|
|
735 |
|
|
|
736 |
|
|
static int |
737 |
|
|
yylex(void) |
738 |
|
|
{ |
739 |
|
80 |
char c, *p, buff[20]; |
740 |
|
|
int count, sign; |
741 |
|
|
|
742 |
|
40 |
for (;;) { |
743 |
✓✓ |
88 |
while (isspace(*yyInput)) |
744 |
|
4 |
yyInput++; |
745 |
|
|
|
746 |
✓✓✓✓
✓✓ |
80 |
if (isdigit(c = *yyInput) || c == '-' || c == '+') { |
747 |
✓✓✓✓
|
48 |
if (c == '-' || c == '+') { |
748 |
|
12 |
sign = c == '-' ? -1 : 1; |
749 |
✗✓ |
12 |
if (!isdigit(*++yyInput)) |
750 |
|
|
/* skip the '-' sign */ |
751 |
|
|
continue; |
752 |
|
|
} |
753 |
|
|
else |
754 |
|
|
sign = 0; |
755 |
|
|
|
756 |
✓✓ |
156 |
for (yylval.Number = 0; isdigit(c = *yyInput++); ) |
757 |
|
64 |
yylval.Number = 10 * yylval.Number + c - '0'; |
758 |
|
28 |
yyInput--; |
759 |
✓✓ |
28 |
if (sign < 0) |
760 |
|
8 |
yylval.Number = -yylval.Number; |
761 |
|
28 |
return sign ? tSNUMBER : tUNUMBER; |
762 |
|
|
} |
763 |
|
|
|
764 |
✗✓ |
12 |
if (isalpha(c)) { |
765 |
|
|
for (p = buff; isalpha(c = *yyInput++) || c == '.'; ) |
766 |
|
|
if (p < &buff[sizeof buff - 1]) |
767 |
|
|
*p++ = c; |
768 |
|
|
*p = '\0'; |
769 |
|
|
yyInput--; |
770 |
|
|
return lookup(buff); |
771 |
|
|
} |
772 |
✓✗ |
12 |
if (c != '(') |
773 |
|
12 |
return *yyInput++; |
774 |
|
|
|
775 |
|
|
count = 0; |
776 |
|
|
do { |
777 |
|
|
c = *yyInput++; |
778 |
|
|
if (c == '\0') |
779 |
|
|
return (c); |
780 |
|
|
if (c == '(') |
781 |
|
|
count++; |
782 |
|
|
else if (c == ')') |
783 |
|
|
count--; |
784 |
|
|
} while (count > 0); |
785 |
|
|
} |
786 |
|
40 |
} |
787 |
|
|
|
788 |
|
|
/* Yield A - B, measured in seconds. */ |
789 |
|
|
static long |
790 |
|
|
difftm(struct tm *a, struct tm *b) |
791 |
|
|
{ |
792 |
|
8 |
int ay = a->tm_year + (YEAR_TMORIGIN - 1); |
793 |
|
4 |
int by = b->tm_year + (YEAR_TMORIGIN - 1); |
794 |
|
4 |
int days = ( |
795 |
|
|
/* difference in day of year */ |
796 |
|
8 |
a->tm_yday - b->tm_yday |
797 |
|
|
/* + intervening leap days */ |
798 |
|
4 |
+ ((ay >> 2) - (by >> 2)) |
799 |
|
4 |
- (ay/100 - by/100) |
800 |
|
4 |
+ ((ay/100 >> 2) - (by/100 >> 2)) |
801 |
|
|
/* + difference in years * 365 */ |
802 |
|
4 |
+ (long)(ay-by) * 365); |
803 |
|
12 |
return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) |
804 |
|
8 |
+ (a->tm_min - b->tm_min)) + (a->tm_sec - b->tm_sec)); |
805 |
|
|
} |
806 |
|
|
|
807 |
|
|
/* |
808 |
|
|
* date_parse() |
809 |
|
|
* |
810 |
|
|
* Returns the number of seconds since the Epoch corresponding to the date. |
811 |
|
|
*/ |
812 |
|
|
time_t |
813 |
|
|
date_parse(const char *p) |
814 |
|
|
{ |
815 |
|
8 |
struct tm gmt, tm; |
816 |
|
4 |
time_t Start, tod, nowtime, tz; |
817 |
|
|
|
818 |
|
4 |
yyInput = p; |
819 |
|
|
|
820 |
✓✗✓✗
✗✓ |
12 |
if (time(&nowtime) == -1 || !gmtime_r(&nowtime, &gmt) || |
821 |
|
4 |
!localtime_r(&nowtime, &tm)) |
822 |
|
|
return -1; |
823 |
|
|
|
824 |
|
4 |
tz = difftm(&gmt, &tm) / 60; |
825 |
|
|
|
826 |
✗✓ |
4 |
if (tm.tm_isdst) |
827 |
|
|
tz += 60; |
828 |
|
|
|
829 |
|
4 |
yyYear = tm.tm_year + 1900; |
830 |
|
4 |
yyMonth = tm.tm_mon + 1; |
831 |
|
4 |
yyDay = tm.tm_mday; |
832 |
|
4 |
yyTimezone = tz; |
833 |
|
4 |
yyDSTmode = DSTmaybe; |
834 |
|
4 |
yyHour = 0; |
835 |
|
4 |
yyMinutes = 0; |
836 |
|
4 |
yySeconds = 0; |
837 |
|
4 |
yyMeridian = MER24; |
838 |
|
4 |
yyRelSeconds = 0; |
839 |
|
4 |
yyRelMonth = 0; |
840 |
|
4 |
yyHaveDate = 0; |
841 |
|
4 |
yyHaveDay = 0; |
842 |
|
4 |
yyHaveRel = 0; |
843 |
|
4 |
yyHaveTime = 0; |
844 |
|
4 |
yyHaveZone = 0; |
845 |
|
|
|
846 |
✗✓ |
12 |
if (yyparse() || yyHaveTime > 1 || yyHaveZone > 1 || |
847 |
|
8 |
yyHaveDate > 1 || yyHaveDay > 1) |
848 |
|
|
return (-1); |
849 |
|
|
|
850 |
✓✗ |
4 |
if (yyHaveDate || yyHaveTime || yyHaveDay) { |
851 |
|
8 |
Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, |
852 |
|
4 |
yySeconds, yyMeridian, yyDSTmode); |
853 |
✗✓ |
4 |
if (Start < 0) |
854 |
|
|
return (-1); |
855 |
|
|
} else { |
856 |
|
|
Start = nowtime; |
857 |
|
|
if (!yyHaveRel) |
858 |
|
|
Start -= ((tm.tm_hour * 60L + tm.tm_min) * 60L) + |
859 |
|
|
tm.tm_sec; |
860 |
|
|
} |
861 |
|
|
|
862 |
|
4 |
Start += yyRelSeconds; |
863 |
|
4 |
Start += RelativeMonth(Start, yyRelMonth); |
864 |
|
|
|
865 |
✗✓ |
4 |
if (yyHaveDay && !yyHaveDate) { |
866 |
|
|
tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber); |
867 |
|
|
Start += tod; |
868 |
|
|
} |
869 |
|
|
|
870 |
|
4 |
return Start; |
871 |
|
4 |
} |
872 |
|
|
|
873 |
|
|
#if defined(TEST) |
874 |
|
|
/* ARGSUSED */ |
875 |
|
|
int |
876 |
|
|
main(int argc, char **argv) |
877 |
|
|
{ |
878 |
|
|
char buff[128]; |
879 |
|
|
time_t d; |
880 |
|
|
|
881 |
|
|
(void)printf("Enter date, or blank line to exit.\n\t> "); |
882 |
|
|
(void)fflush(stdout); |
883 |
|
|
while (fgets(buff, sizeof(buff), stdin) && buff[0]) { |
884 |
|
|
d = date_parse(buff); |
885 |
|
|
if (d == -1) |
886 |
|
|
(void)printf("Bad format - couldn't convert.\n"); |
887 |
|
|
else |
888 |
|
|
(void)printf("%s", ctime(&d)); |
889 |
|
|
(void)printf("\t> "); |
890 |
|
|
(void)fflush(stdout); |
891 |
|
|
} |
892 |
|
|
|
893 |
|
|
return (0); |
894 |
|
|
} |
895 |
|
|
#endif /* defined(TEST) */ |