1176998Sphk%{ 2176998Sphk/* 3176998Sphk** Originally written by Steven M. Bellovin <smb@research.att.com> while 4176998Sphk** at the University of North Carolina at Chapel Hill. Later tweaked by 5176998Sphk** a couple of people on Usenet. Completely overhauled by Rich $alz 6176998Sphk** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990; 7176998Sphk** 8176998Sphk** This grammar has 10 shift/reduce conflicts. 9176998Sphk** 10176998Sphk** This code is in the public domain and has no copyright. 11176998Sphk** 12176998Sphk** Picked up from CVS and slightly cleaned up by to WARNS=5 level by 13176998Sphk** Poul-Henning Kamp <phk@FreeBSD.org> 14176998Sphk** 15176998Sphk** $FreeBSD$ 16176998Sphk*/ 17176998Sphk 18176998Sphk#include <stdio.h> 19176998Sphk#include <stdlib.h> 20176998Sphk#include <ctype.h> 21176998Sphk#include <string.h> 22176998Sphk#include <sys/types.h> 23176998Sphk#include <sys/time.h> 24176998Sphk 25176998Sphk#include "libfifolog.h" 26176998Sphk 27176998Sphk#define yylex getdate_yylex 28176998Sphk#define yyerror getdate_yyerror 29176998Sphk 30176998Sphkstatic int yylex(void); 31176998Sphkstatic int yyerror(const char *); 32176998Sphk 33176998Sphk#define EPOCH 1970 34176998Sphk#define HOUR(x) ((time_t)(x) * 60) 35176998Sphk#define SECSPERDAY (24L * 60L * 60L) 36176998Sphk 37176998Sphk 38176998Sphk/* 39176998Sphk** An entry in the lexical lookup table. 40176998Sphk*/ 41176998Sphktypedef struct _TABLE { 42176998Sphk const char *name; 43176998Sphk int type; 44176998Sphk time_t value; 45176998Sphk} TABLE; 46176998Sphk 47176998Sphk 48176998Sphk/* 49176998Sphk** Daylight-savings mode: on, off, or not yet known. 50176998Sphk*/ 51176998Sphktypedef enum _DSTMODE { 52176998Sphk DSToff, DSTon, DSTmaybe 53176998Sphk} DSTMODE; 54176998Sphk 55176998Sphk/* 56176998Sphk** Meridian: am, pm, or 24-hour style. 57176998Sphk*/ 58176998Sphktypedef enum _MERIDIAN { 59176998Sphk MERam, MERpm, MER24 60176998Sphk} MERIDIAN; 61176998Sphk 62176998Sphk 63176998Sphk/* 64176998Sphk** Global variables. We could get rid of most of these by using a good 65176998Sphk** union as the yacc stack. (This routine was originally written before 66176998Sphk** yacc had the %union construct.) Maybe someday; right now we only use 67176998Sphk** the %union very rarely. 68176998Sphk*/ 69176998Sphkstatic char *yyInput; 70176998Sphkstatic DSTMODE yyDSTmode; 71176998Sphkstatic time_t yyDayOrdinal; 72176998Sphkstatic time_t yyDayNumber; 73176998Sphkstatic int yyHaveDate; 74176998Sphkstatic int yyHaveDay; 75176998Sphkstatic int yyHaveRel; 76176998Sphkstatic int yyHaveTime; 77176998Sphkstatic int yyHaveZone; 78176998Sphkstatic time_t yyTimezone; 79176998Sphkstatic time_t yyDay; 80176998Sphkstatic time_t yyHour; 81176998Sphkstatic time_t yyMinutes; 82176998Sphkstatic time_t yyMonth; 83176998Sphkstatic time_t yySeconds; 84176998Sphkstatic time_t yyYear; 85176998Sphkstatic MERIDIAN yyMeridian; 86176998Sphkstatic time_t yyRelMonth; 87176998Sphkstatic time_t yyRelSeconds; 88176998Sphk 89176998Sphk%} 90176998Sphk 91176998Sphk%union { 92176998Sphk time_t Number; 93176998Sphk enum _MERIDIAN Meridian; 94176998Sphk} 95176998Sphk 96176998Sphk%token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT 97176998Sphk%token tSEC_UNIT tSNUMBER tUNUMBER tZONE tDST 98176998Sphk 99176998Sphk%type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT 100176998Sphk%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE 101176998Sphk%type <Meridian> tMERIDIAN o_merid 102176998Sphk 103176998Sphk%% 104176998Sphk 105176998Sphkspec : /* NULL */ 106176998Sphk | spec item 107176998Sphk ; 108176998Sphk 109176998Sphkitem : time { 110176998Sphk yyHaveTime++; 111176998Sphk } 112176998Sphk | zone { 113176998Sphk yyHaveZone++; 114176998Sphk } 115176998Sphk | date { 116176998Sphk yyHaveDate++; 117176998Sphk } 118176998Sphk | day { 119176998Sphk yyHaveDay++; 120176998Sphk } 121176998Sphk | rel { 122176998Sphk yyHaveRel++; 123176998Sphk } 124176998Sphk | cvsstamp { 125176998Sphk yyHaveTime++; 126176998Sphk yyHaveDate++; 127176998Sphk yyHaveZone++; 128176998Sphk } 129176998Sphk | number 130176998Sphk ; 131176998Sphk 132176998Sphkcvsstamp: tUNUMBER '.' tUNUMBER '.' tUNUMBER '.' tUNUMBER '.' tUNUMBER '.' tUNUMBER { 133176998Sphk yyYear = $1; 134176998Sphk if (yyYear < 100) yyYear += 1900; 135176998Sphk yyMonth = $3; 136176998Sphk yyDay = $5; 137176998Sphk yyHour = $7; 138176998Sphk yyMinutes = $9; 139176998Sphk yySeconds = $11; 140176998Sphk yyDSTmode = DSToff; 141176998Sphk yyTimezone = 0; 142176998Sphk } 143176998Sphk ; 144176998Sphk 145176998Sphktime : tUNUMBER tMERIDIAN { 146176998Sphk yyHour = $1; 147176998Sphk yyMinutes = 0; 148176998Sphk yySeconds = 0; 149176998Sphk yyMeridian = $2; 150176998Sphk } 151176998Sphk | tUNUMBER ':' tUNUMBER o_merid { 152176998Sphk yyHour = $1; 153176998Sphk yyMinutes = $3; 154176998Sphk yySeconds = 0; 155176998Sphk yyMeridian = $4; 156176998Sphk } 157176998Sphk | tUNUMBER ':' tUNUMBER tSNUMBER { 158176998Sphk yyHour = $1; 159176998Sphk yyMinutes = $3; 160176998Sphk yyMeridian = MER24; 161176998Sphk yyDSTmode = DSToff; 162176998Sphk yyTimezone = - ($4 % 100 + ($4 / 100) * 60); 163176998Sphk } 164176998Sphk | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid { 165176998Sphk yyHour = $1; 166176998Sphk yyMinutes = $3; 167176998Sphk yySeconds = $5; 168176998Sphk yyMeridian = $6; 169176998Sphk } 170176998Sphk | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER { 171176998Sphk yyHour = $1; 172176998Sphk yyMinutes = $3; 173176998Sphk yySeconds = $5; 174176998Sphk yyMeridian = MER24; 175176998Sphk yyDSTmode = DSToff; 176176998Sphk yyTimezone = - ($6 % 100 + ($6 / 100) * 60); 177176998Sphk } 178176998Sphk ; 179176998Sphk 180176998Sphkzone : tZONE { 181176998Sphk yyTimezone = $1; 182176998Sphk yyDSTmode = DSToff; 183176998Sphk } 184176998Sphk | tDAYZONE { 185176998Sphk yyTimezone = $1; 186176998Sphk yyDSTmode = DSTon; 187176998Sphk } 188176998Sphk | 189176998Sphk tZONE tDST { 190176998Sphk yyTimezone = $1; 191176998Sphk yyDSTmode = DSTon; 192176998Sphk } 193176998Sphk ; 194176998Sphk 195176998Sphkday : tDAY { 196176998Sphk yyDayOrdinal = 1; 197176998Sphk yyDayNumber = $1; 198176998Sphk } 199176998Sphk | tDAY ',' { 200176998Sphk yyDayOrdinal = 1; 201176998Sphk yyDayNumber = $1; 202176998Sphk } 203176998Sphk | tUNUMBER tDAY { 204176998Sphk yyDayOrdinal = $1; 205176998Sphk yyDayNumber = $2; 206176998Sphk } 207176998Sphk ; 208176998Sphk 209176998Sphkdate : tUNUMBER '/' tUNUMBER { 210176998Sphk yyMonth = $1; 211176998Sphk yyDay = $3; 212176998Sphk } 213176998Sphk | tUNUMBER '/' tUNUMBER '/' tUNUMBER { 214176998Sphk if ($1 >= 100) { 215176998Sphk yyYear = $1; 216176998Sphk yyMonth = $3; 217176998Sphk yyDay = $5; 218176998Sphk } else { 219176998Sphk yyMonth = $1; 220176998Sphk yyDay = $3; 221176998Sphk yyYear = $5; 222176998Sphk } 223176998Sphk } 224176998Sphk | tUNUMBER tSNUMBER tSNUMBER { 225176998Sphk /* ISO 8601 format. yyyy-mm-dd. */ 226176998Sphk yyYear = $1; 227176998Sphk yyMonth = -$2; 228176998Sphk yyDay = -$3; 229176998Sphk } 230176998Sphk | tUNUMBER tMONTH tSNUMBER { 231176998Sphk /* e.g. 17-JUN-1992. */ 232176998Sphk yyDay = $1; 233176998Sphk yyMonth = $2; 234176998Sphk yyYear = -$3; 235176998Sphk } 236176998Sphk | tMONTH tUNUMBER { 237176998Sphk yyMonth = $1; 238176998Sphk yyDay = $2; 239176998Sphk } 240176998Sphk | tMONTH tUNUMBER ',' tUNUMBER { 241176998Sphk yyMonth = $1; 242176998Sphk yyDay = $2; 243176998Sphk yyYear = $4; 244176998Sphk } 245176998Sphk | tUNUMBER tMONTH { 246176998Sphk yyMonth = $2; 247176998Sphk yyDay = $1; 248176998Sphk } 249176998Sphk | tUNUMBER tMONTH tUNUMBER { 250176998Sphk yyMonth = $2; 251176998Sphk yyDay = $1; 252176998Sphk yyYear = $3; 253176998Sphk } 254176998Sphk ; 255176998Sphk 256176998Sphkrel : relunit tAGO { 257176998Sphk yyRelSeconds = -yyRelSeconds; 258176998Sphk yyRelMonth = -yyRelMonth; 259176998Sphk } 260176998Sphk | relunit 261176998Sphk ; 262176998Sphk 263176998Sphkrelunit : tUNUMBER tMINUTE_UNIT { 264176998Sphk yyRelSeconds += $1 * $2 * 60L; 265176998Sphk } 266176998Sphk | tSNUMBER tMINUTE_UNIT { 267176998Sphk yyRelSeconds += $1 * $2 * 60L; 268176998Sphk } 269176998Sphk | tMINUTE_UNIT { 270176998Sphk yyRelSeconds += $1 * 60L; 271176998Sphk } 272176998Sphk | tSNUMBER tSEC_UNIT { 273176998Sphk yyRelSeconds += $1; 274176998Sphk } 275176998Sphk | tUNUMBER tSEC_UNIT { 276176998Sphk yyRelSeconds += $1; 277176998Sphk } 278176998Sphk | tSEC_UNIT { 279176998Sphk yyRelSeconds++; 280176998Sphk } 281176998Sphk | tSNUMBER tMONTH_UNIT { 282176998Sphk yyRelMonth += $1 * $2; 283176998Sphk } 284176998Sphk | tUNUMBER tMONTH_UNIT { 285176998Sphk yyRelMonth += $1 * $2; 286176998Sphk } 287176998Sphk | tMONTH_UNIT { 288176998Sphk yyRelMonth += $1; 289176998Sphk } 290176998Sphk ; 291176998Sphk 292176998Sphknumber : tUNUMBER { 293176998Sphk if (yyHaveTime && yyHaveDate && !yyHaveRel) 294176998Sphk yyYear = $1; 295176998Sphk else { 296176998Sphk if($1>10000) { 297176998Sphk yyHaveDate++; 298176998Sphk yyDay= ($1)%100; 299176998Sphk yyMonth= ($1/100)%100; 300176998Sphk yyYear = $1/10000; 301176998Sphk } 302176998Sphk else { 303176998Sphk yyHaveTime++; 304176998Sphk if ($1 < 100) { 305176998Sphk yyHour = $1; 306176998Sphk yyMinutes = 0; 307176998Sphk } 308176998Sphk else { 309176998Sphk yyHour = $1 / 100; 310176998Sphk yyMinutes = $1 % 100; 311176998Sphk } 312176998Sphk yySeconds = 0; 313176998Sphk yyMeridian = MER24; 314176998Sphk } 315176998Sphk } 316176998Sphk } 317176998Sphk ; 318176998Sphk 319176998Sphko_merid : /* NULL */ { 320176998Sphk $$ = MER24; 321176998Sphk } 322176998Sphk | tMERIDIAN { 323176998Sphk $$ = $1; 324176998Sphk } 325176998Sphk ; 326176998Sphk 327176998Sphk%% 328176998Sphk 329176998Sphk/* Month and day table. */ 330176998Sphkstatic TABLE const MonthDayTable[] = { 331176998Sphk { "january", tMONTH, 1 }, 332176998Sphk { "february", tMONTH, 2 }, 333176998Sphk { "march", tMONTH, 3 }, 334176998Sphk { "april", tMONTH, 4 }, 335176998Sphk { "may", tMONTH, 5 }, 336176998Sphk { "june", tMONTH, 6 }, 337176998Sphk { "july", tMONTH, 7 }, 338176998Sphk { "august", tMONTH, 8 }, 339176998Sphk { "september", tMONTH, 9 }, 340176998Sphk { "sept", tMONTH, 9 }, 341176998Sphk { "october", tMONTH, 10 }, 342176998Sphk { "november", tMONTH, 11 }, 343176998Sphk { "december", tMONTH, 12 }, 344176998Sphk { "sunday", tDAY, 0 }, 345176998Sphk { "monday", tDAY, 1 }, 346176998Sphk { "tuesday", tDAY, 2 }, 347176998Sphk { "tues", tDAY, 2 }, 348176998Sphk { "wednesday", tDAY, 3 }, 349176998Sphk { "wednes", tDAY, 3 }, 350176998Sphk { "thursday", tDAY, 4 }, 351176998Sphk { "thur", tDAY, 4 }, 352176998Sphk { "thurs", tDAY, 4 }, 353176998Sphk { "friday", tDAY, 5 }, 354176998Sphk { "saturday", tDAY, 6 }, 355176998Sphk { NULL, 0, 0 } 356176998Sphk}; 357176998Sphk 358176998Sphk/* Time units table. */ 359176998Sphkstatic TABLE const UnitsTable[] = { 360176998Sphk { "year", tMONTH_UNIT, 12 }, 361176998Sphk { "month", tMONTH_UNIT, 1 }, 362176998Sphk { "fortnight", tMINUTE_UNIT, 14 * 24 * 60 }, 363176998Sphk { "week", tMINUTE_UNIT, 7 * 24 * 60 }, 364176998Sphk { "day", tMINUTE_UNIT, 1 * 24 * 60 }, 365176998Sphk { "hour", tMINUTE_UNIT, 60 }, 366176998Sphk { "minute", tMINUTE_UNIT, 1 }, 367176998Sphk { "min", tMINUTE_UNIT, 1 }, 368176998Sphk { "second", tSEC_UNIT, 1 }, 369176998Sphk { "sec", tSEC_UNIT, 1 }, 370176998Sphk { NULL, 0, 0 } 371176998Sphk}; 372176998Sphk 373176998Sphk/* Assorted relative-time words. */ 374176998Sphkstatic TABLE const OtherTable[] = { 375176998Sphk { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 }, 376176998Sphk { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 }, 377176998Sphk { "today", tMINUTE_UNIT, 0 }, 378176998Sphk { "now", tMINUTE_UNIT, 0 }, 379176998Sphk { "last", tUNUMBER, -1 }, 380176998Sphk { "this", tMINUTE_UNIT, 0 }, 381176998Sphk { "next", tUNUMBER, 2 }, 382176998Sphk { "first", tUNUMBER, 1 }, 383176998Sphk/* { "second", tUNUMBER, 2 }, */ 384176998Sphk { "third", tUNUMBER, 3 }, 385176998Sphk { "fourth", tUNUMBER, 4 }, 386176998Sphk { "fifth", tUNUMBER, 5 }, 387176998Sphk { "sixth", tUNUMBER, 6 }, 388176998Sphk { "seventh", tUNUMBER, 7 }, 389176998Sphk { "eighth", tUNUMBER, 8 }, 390176998Sphk { "ninth", tUNUMBER, 9 }, 391176998Sphk { "tenth", tUNUMBER, 10 }, 392176998Sphk { "eleventh", tUNUMBER, 11 }, 393176998Sphk { "twelfth", tUNUMBER, 12 }, 394176998Sphk { "ago", tAGO, 1 }, 395176998Sphk { NULL, 0, 0 } 396176998Sphk}; 397176998Sphk 398176998Sphk/* The timezone table. */ 399176998Sphk/* Some of these are commented out because a time_t can't store a float. */ 400176998Sphkstatic TABLE const TimezoneTable[] = { 401176998Sphk { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */ 402176998Sphk { "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */ 403176998Sphk { "utc", tZONE, HOUR( 0) }, 404176998Sphk { "wet", tZONE, HOUR( 0) }, /* Western European */ 405176998Sphk { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */ 406176998Sphk { "wat", tZONE, HOUR( 1) }, /* West Africa */ 407176998Sphk { "at", tZONE, HOUR( 2) }, /* Azores */ 408176998Sphk#if 0 409176998Sphk /* For completeness. BST is also British Summer, and GST is 410176998Sphk * also Guam Standard. */ 411176998Sphk { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */ 412176998Sphk { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */ 413176998Sphk#endif 414176998Sphk#if 0 415176998Sphk { "nft", tZONE, HOUR(3.5) }, /* Newfoundland */ 416176998Sphk { "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */ 417176998Sphk { "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */ 418176998Sphk#endif 419176998Sphk { "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */ 420176998Sphk { "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */ 421176998Sphk { "est", tZONE, HOUR( 5) }, /* Eastern Standard */ 422176998Sphk { "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */ 423176998Sphk { "cst", tZONE, HOUR( 6) }, /* Central Standard */ 424176998Sphk { "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */ 425176998Sphk { "mst", tZONE, HOUR( 7) }, /* Mountain Standard */ 426176998Sphk { "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */ 427176998Sphk { "pst", tZONE, HOUR( 8) }, /* Pacific Standard */ 428176998Sphk { "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */ 429176998Sphk { "yst", tZONE, HOUR( 9) }, /* Yukon Standard */ 430176998Sphk { "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */ 431176998Sphk { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */ 432176998Sphk { "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */ 433176998Sphk { "cat", tZONE, HOUR(10) }, /* Central Alaska */ 434176998Sphk { "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */ 435176998Sphk { "nt", tZONE, HOUR(11) }, /* Nome */ 436176998Sphk { "idlw", tZONE, HOUR(12) }, /* International Date Line West */ 437176998Sphk { "cet", tZONE, -HOUR(1) }, /* Central European */ 438176998Sphk { "met", tZONE, -HOUR(1) }, /* Middle European */ 439176998Sphk { "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */ 440176998Sphk { "mest", tDAYZONE, -HOUR(1) }, /* Middle European Summer */ 441176998Sphk { "swt", tZONE, -HOUR(1) }, /* Swedish Winter */ 442176998Sphk { "sst", tDAYZONE, -HOUR(1) }, /* Swedish Summer */ 443176998Sphk { "fwt", tZONE, -HOUR(1) }, /* French Winter */ 444176998Sphk { "fst", tDAYZONE, -HOUR(1) }, /* French Summer */ 445176998Sphk { "eet", tZONE, -HOUR(2) }, /* Eastern Europe, USSR Zone 1 */ 446176998Sphk { "bt", tZONE, -HOUR(3) }, /* Baghdad, USSR Zone 2 */ 447176998Sphk#if 0 448176998Sphk { "it", tZONE, -HOUR(3.5) },/* Iran */ 449176998Sphk#endif 450176998Sphk { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */ 451176998Sphk { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */ 452176998Sphk#if 0 453176998Sphk { "ist", tZONE, -HOUR(5.5) },/* Indian Standard */ 454176998Sphk#endif 455176998Sphk { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */ 456176998Sphk#if 0 457176998Sphk /* For completeness. NST is also Newfoundland Stanard, and SST is 458176998Sphk * also Swedish Summer. */ 459176998Sphk { "nst", tZONE, -HOUR(6.5) },/* North Sumatra */ 460176998Sphk { "sst", tZONE, -HOUR(7) }, /* South Sumatra, USSR Zone 6 */ 461176998Sphk#endif /* 0 */ 462176998Sphk { "wast", tZONE, -HOUR(7) }, /* West Australian Standard */ 463176998Sphk { "wadt", tDAYZONE, -HOUR(7) }, /* West Australian Daylight */ 464176998Sphk#if 0 465176998Sphk { "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */ 466176998Sphk#endif 467176998Sphk { "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */ 468176998Sphk { "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */ 469176998Sphk#if 0 470176998Sphk { "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */ 471176998Sphk { "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */ 472176998Sphk#endif 473176998Sphk { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */ 474176998Sphk { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */ 475176998Sphk { "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */ 476176998Sphk { "nzt", tZONE, -HOUR(12) }, /* New Zealand */ 477176998Sphk { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */ 478176998Sphk { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */ 479176998Sphk { "idle", tZONE, -HOUR(12) }, /* International Date Line East */ 480176998Sphk { NULL, 0, 0 } 481176998Sphk}; 482176998Sphk 483176998Sphk/* Military timezone table. */ 484176998Sphkstatic TABLE const MilitaryTable[] = { 485176998Sphk { "a", tZONE, HOUR( 1) }, 486176998Sphk { "b", tZONE, HOUR( 2) }, 487176998Sphk { "c", tZONE, HOUR( 3) }, 488176998Sphk { "d", tZONE, HOUR( 4) }, 489176998Sphk { "e", tZONE, HOUR( 5) }, 490176998Sphk { "f", tZONE, HOUR( 6) }, 491176998Sphk { "g", tZONE, HOUR( 7) }, 492176998Sphk { "h", tZONE, HOUR( 8) }, 493176998Sphk { "i", tZONE, HOUR( 9) }, 494176998Sphk { "k", tZONE, HOUR( 10) }, 495176998Sphk { "l", tZONE, HOUR( 11) }, 496176998Sphk { "m", tZONE, HOUR( 12) }, 497176998Sphk { "n", tZONE, HOUR(- 1) }, 498176998Sphk { "o", tZONE, HOUR(- 2) }, 499176998Sphk { "p", tZONE, HOUR(- 3) }, 500176998Sphk { "q", tZONE, HOUR(- 4) }, 501176998Sphk { "r", tZONE, HOUR(- 5) }, 502176998Sphk { "s", tZONE, HOUR(- 6) }, 503176998Sphk { "t", tZONE, HOUR(- 7) }, 504176998Sphk { "u", tZONE, HOUR(- 8) }, 505176998Sphk { "v", tZONE, HOUR(- 9) }, 506176998Sphk { "w", tZONE, HOUR(-10) }, 507176998Sphk { "x", tZONE, HOUR(-11) }, 508176998Sphk { "y", tZONE, HOUR(-12) }, 509176998Sphk { "z", tZONE, HOUR( 0) }, 510176998Sphk { NULL, 0, 0 } 511176998Sphk}; 512176998Sphk 513176998Sphk 514176998Sphk 515176998Sphk 516176998Sphk/* ARGSUSED */ 517176998Sphkstatic int 518176998Sphkyyerror(const char *s __unused) 519176998Sphk{ 520176998Sphk return 0; 521176998Sphk} 522176998Sphk 523176998Sphk 524176998Sphkstatic time_t 525176998SphkToSeconds(time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian) 526176998Sphk{ 527176998Sphk if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59) 528176998Sphk return -1; 529176998Sphk switch (Meridian) { 530176998Sphk case MER24: 531176998Sphk if (Hours < 0 || Hours > 23) 532176998Sphk return -1; 533176998Sphk return (Hours * 60L + Minutes) * 60L + Seconds; 534176998Sphk case MERam: 535176998Sphk if (Hours < 1 || Hours > 12) 536176998Sphk return -1; 537176998Sphk if (Hours == 12) 538176998Sphk Hours = 0; 539176998Sphk return (Hours * 60L + Minutes) * 60L + Seconds; 540176998Sphk case MERpm: 541176998Sphk if (Hours < 1 || Hours > 12) 542176998Sphk return -1; 543176998Sphk if (Hours == 12) 544176998Sphk Hours = 0; 545176998Sphk return ((Hours + 12) * 60L + Minutes) * 60L + Seconds; 546176998Sphk default: 547176998Sphk abort (); 548176998Sphk } 549176998Sphk /* NOTREACHED */ 550176998Sphk} 551176998Sphk 552176998Sphk 553176998Sphk/* Year is either 554176998Sphk * A negative number, which means to use its absolute value (why?) 555176998Sphk * A number from 0 to 99, which means a year from 1900 to 1999, or 556176998Sphk * The actual year (>=100). */ 557176998Sphkstatic time_t 558176998SphkConvert(time_t Month, time_t Day, time_t Year, 559176998Sphk time_t Hours, time_t Minutes, time_t Seconds, 560176998Sphk MERIDIAN Meridian, DSTMODE DSTmode) 561176998Sphk{ 562176998Sphk static int DaysInMonth[12] = { 563176998Sphk 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 564176998Sphk }; 565176998Sphk time_t tod; 566176998Sphk time_t Julian; 567176998Sphk int i; 568176998Sphk struct tm *ltm; 569176998Sphk 570176998Sphk if (Year < 0) 571176998Sphk Year = -Year; 572176998Sphk if (Year < 69) 573176998Sphk Year += 2000; 574176998Sphk else if (Year < 100) 575176998Sphk Year += 1900; 576176998Sphk DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0) 577176998Sphk ? 29 : 28; 578176998Sphk /* Checking for 2038 bogusly assumes that time_t is 32 bits. But 579176998Sphk I'm too lazy to try to check for time_t overflow in another way. */ 580176998Sphk if (Year < EPOCH || Year > 2038 581176998Sphk || Month < 1 || Month > 12 582176998Sphk /* Lint fluff: "conversion from long may lose accuracy" */ 583176998Sphk || Day < 1 || Day > DaysInMonth[(int)--Month]) 584176998Sphk /* FIXME: 585176998Sphk * It would be nice to set a global error string here. 586176998Sphk * "February 30 is not a valid date" is much more informative than 587176998Sphk * "Can't parse date/time: 100 months" when the user input was 588176998Sphk * "100 months" and addition resolved that to February 30, for 589176998Sphk * example. See rcs2-7 in src/sanity.sh for more. */ 590176998Sphk return -1; 591176998Sphk 592176998Sphk for (Julian = Day - 1, i = 0; i < Month; i++) 593176998Sphk Julian += DaysInMonth[i]; 594176998Sphk for (i = EPOCH; i < Year; i++) 595176998Sphk Julian += 365 + (i % 4 == 0); 596176998Sphk Julian *= SECSPERDAY; 597176998Sphk Julian += yyTimezone * 60L; 598176998Sphk if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0) 599176998Sphk return -1; 600176998Sphk Julian += tod; 601176998Sphk ltm = localtime(&Julian); 602176998Sphkfprintf(stderr, "DST %d TZ %s %d\n", DSTmode, ltm->tm_zone, ltm->tm_isdst); 603176998Sphk if (DSTmode == DSTon 604176998Sphk || (DSTmode == DSTmaybe && localtime(&Julian)->tm_isdst)) 605176998Sphk Julian -= 60 * 60; 606176998Sphk return Julian; 607176998Sphk} 608176998Sphk 609176998Sphk 610176998Sphkstatic time_t 611176998SphkDSTcorrect(time_t Start, time_t Future) 612176998Sphk{ 613176998Sphk time_t StartDay; 614176998Sphk time_t FutureDay; 615176998Sphk 616176998Sphk StartDay = (localtime(&Start)->tm_hour + 1) % 24; 617176998Sphk FutureDay = (localtime(&Future)->tm_hour + 1) % 24; 618176998Sphk return (Future - Start) + (StartDay - FutureDay) * 60L * 60L; 619176998Sphk} 620176998Sphk 621176998Sphk 622176998Sphkstatic time_t 623176998SphkRelativeDate(time_t Start, time_t DayOrdinal, time_t DayNumber) 624176998Sphk{ 625176998Sphk struct tm *tm; 626176998Sphk time_t now; 627176998Sphk 628176998Sphk now = Start; 629176998Sphk tm = localtime(&now); 630176998Sphk now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7); 631176998Sphk now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1); 632176998Sphk return DSTcorrect(Start, now); 633176998Sphk} 634176998Sphk 635176998Sphk 636176998Sphkstatic time_t 637176998SphkRelativeMonth(time_t Start, time_t RelMonth) 638176998Sphk{ 639176998Sphk struct tm *tm; 640176998Sphk time_t Month; 641176998Sphk time_t Year; 642176998Sphk 643176998Sphk if (RelMonth == 0) 644176998Sphk return 0; 645176998Sphk tm = localtime(&Start); 646176998Sphk Month = 12 * (tm->tm_year + 1900) + tm->tm_mon + RelMonth; 647176998Sphk Year = Month / 12; 648176998Sphk Month = Month % 12 + 1; 649176998Sphk return DSTcorrect(Start, 650176998Sphk Convert(Month, (time_t)tm->tm_mday, Year, 651176998Sphk (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec, 652176998Sphk MER24, DSTmaybe)); 653176998Sphk} 654176998Sphk 655176998Sphk 656176998Sphkstatic int 657176998SphkLookupWord(char *buff) 658176998Sphk{ 659176998Sphk char *p; 660176998Sphk char *q; 661176998Sphk const TABLE *tp; 662176998Sphk int i; 663176998Sphk int abbrev; 664176998Sphk 665176998Sphk /* Make it lowercase. */ 666176998Sphk for (p = buff; *p; p++) 667176998Sphk if (isupper(*p)) 668176998Sphk *p = tolower(*p); 669176998Sphk 670176998Sphk if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) { 671176998Sphk yylval.Meridian = MERam; 672176998Sphk return tMERIDIAN; 673176998Sphk } 674176998Sphk if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) { 675176998Sphk yylval.Meridian = MERpm; 676176998Sphk return tMERIDIAN; 677176998Sphk } 678176998Sphk 679176998Sphk /* See if we have an abbreviation for a month. */ 680176998Sphk if (strlen(buff) == 3) 681176998Sphk abbrev = 1; 682176998Sphk else if (strlen(buff) == 4 && buff[3] == '.') { 683176998Sphk abbrev = 1; 684176998Sphk buff[3] = '\0'; 685176998Sphk } 686176998Sphk else 687176998Sphk abbrev = 0; 688176998Sphk 689176998Sphk for (tp = MonthDayTable; tp->name; tp++) { 690176998Sphk if (abbrev) { 691176998Sphk if (strncmp(buff, tp->name, 3) == 0) { 692176998Sphk yylval.Number = tp->value; 693176998Sphk return tp->type; 694176998Sphk } 695176998Sphk } 696176998Sphk else if (strcmp(buff, tp->name) == 0) { 697176998Sphk yylval.Number = tp->value; 698176998Sphk return tp->type; 699176998Sphk } 700176998Sphk } 701176998Sphk 702176998Sphk for (tp = TimezoneTable; tp->name; tp++) 703176998Sphk if (strcmp(buff, tp->name) == 0) { 704176998Sphk yylval.Number = tp->value; 705176998Sphk return tp->type; 706176998Sphk } 707176998Sphk 708176998Sphk if (strcmp(buff, "dst") == 0) 709176998Sphk return tDST; 710176998Sphk 711176998Sphk for (tp = UnitsTable; tp->name; tp++) 712176998Sphk if (strcmp(buff, tp->name) == 0) { 713176998Sphk yylval.Number = tp->value; 714176998Sphk return tp->type; 715176998Sphk } 716176998Sphk 717176998Sphk /* Strip off any plural and try the units table again. */ 718176998Sphk i = strlen(buff) - 1; 719176998Sphk if (buff[i] == 's') { 720176998Sphk buff[i] = '\0'; 721176998Sphk for (tp = UnitsTable; tp->name; tp++) 722176998Sphk if (strcmp(buff, tp->name) == 0) { 723176998Sphk yylval.Number = tp->value; 724176998Sphk return tp->type; 725176998Sphk } 726176998Sphk buff[i] = 's'; /* Put back for "this" in OtherTable. */ 727176998Sphk } 728176998Sphk 729176998Sphk for (tp = OtherTable; tp->name; tp++) 730176998Sphk if (strcmp(buff, tp->name) == 0) { 731176998Sphk yylval.Number = tp->value; 732176998Sphk return tp->type; 733176998Sphk } 734176998Sphk 735176998Sphk /* Military timezones. */ 736176998Sphk if (buff[1] == '\0' && isalpha(*buff)) { 737176998Sphk for (tp = MilitaryTable; tp->name; tp++) 738176998Sphk if (strcmp(buff, tp->name) == 0) { 739176998Sphk yylval.Number = tp->value; 740176998Sphk return tp->type; 741176998Sphk } 742176998Sphk } 743176998Sphk 744176998Sphk /* Drop out any periods and try the timezone table again. */ 745176998Sphk for (i = 0, p = q = buff; *q; q++) 746176998Sphk if (*q != '.') 747176998Sphk *p++ = *q; 748176998Sphk else 749176998Sphk i++; 750176998Sphk *p = '\0'; 751176998Sphk if (i) 752176998Sphk for (tp = TimezoneTable; tp->name; tp++) 753176998Sphk if (strcmp(buff, tp->name) == 0) { 754176998Sphk yylval.Number = tp->value; 755176998Sphk return tp->type; 756176998Sphk } 757176998Sphk 758176998Sphk return tID; 759176998Sphk} 760176998Sphk 761176998Sphk 762176998Sphkstatic int 763201227Sedyylex(void) 764176998Sphk{ 765176998Sphk char c; 766176998Sphk char *p; 767176998Sphk char buff[20]; 768176998Sphk int Count; 769176998Sphk int sign; 770176998Sphk 771176998Sphk for ( ; ; ) { 772176998Sphk while (isspace(*yyInput)) 773176998Sphk yyInput++; 774176998Sphk 775176998Sphk if (isdigit(c = *yyInput) || c == '-' || c == '+') { 776176998Sphk if (c == '-' || c == '+') { 777176998Sphk sign = c == '-' ? -1 : 1; 778176998Sphk if (!isdigit(*++yyInput)) 779176998Sphk /* skip the '-' sign */ 780176998Sphk continue; 781176998Sphk } 782176998Sphk else 783176998Sphk sign = 0; 784176998Sphk for (yylval.Number = 0; isdigit(c = *yyInput++); ) 785176998Sphk yylval.Number = 10 * yylval.Number + c - '0'; 786176998Sphk yyInput--; 787176998Sphk if (sign < 0) 788176998Sphk yylval.Number = -yylval.Number; 789176998Sphk return sign ? tSNUMBER : tUNUMBER; 790176998Sphk } 791176998Sphk if (isalpha(c)) { 792176998Sphk for (p = buff; isalpha(c = *yyInput++) || c == '.'; ) 793176998Sphk if (p < &buff[sizeof buff - 1]) 794176998Sphk *p++ = c; 795176998Sphk *p = '\0'; 796176998Sphk yyInput--; 797176998Sphk return LookupWord(buff); 798176998Sphk } 799176998Sphk if (c != '(') 800176998Sphk return *yyInput++; 801176998Sphk Count = 0; 802176998Sphk do { 803176998Sphk c = *yyInput++; 804176998Sphk if (c == '\0') 805176998Sphk return c; 806176998Sphk if (c == '(') 807176998Sphk Count++; 808176998Sphk else if (c == ')') 809176998Sphk Count--; 810176998Sphk } while (Count > 0); 811176998Sphk } 812176998Sphk} 813176998Sphk 814176998Sphk#define TM_YEAR_ORIGIN 1900 815176998Sphk 816176998Sphktime_t 817176998Sphkget_date(char *p) 818176998Sphk{ 819176998Sphk struct tm *tm, gmt; 820176998Sphk time_t Start; 821176998Sphk time_t tod; 822176998Sphk time_t nowtime; 823176998Sphk struct tm *gmt_ptr; 824176998Sphk 825176998Sphk yyInput = p; 826176998Sphk 827176998Sphk (void)time (&nowtime); 828176998Sphk 829176998Sphk gmt_ptr = gmtime (&nowtime); 830176998Sphk if (gmt_ptr != NULL) 831176998Sphk { 832176998Sphk /* Make a copy, in case localtime modifies *tm (I think 833176998Sphk that comment now applies to *gmt_ptr, but I am too 834176998Sphk lazy to dig into how gmtime and locatime allocate the 835176998Sphk structures they return pointers to). */ 836176998Sphk gmt = *gmt_ptr; 837176998Sphk } 838176998Sphk 839176998Sphk if (! (tm = localtime (&nowtime))) 840176998Sphk return -1; 841176998Sphk 842176998Sphk tm = localtime(&nowtime); 843176998Sphk yyYear = tm->tm_year + 1900; 844176998Sphk yyMonth = tm->tm_mon + 1; 845176998Sphk yyDay = tm->tm_mday; 846176998Sphk yyTimezone = tm->tm_gmtoff; 847176998Sphk yyDSTmode = DSTmaybe; 848176998Sphk yyHour = 0; 849176998Sphk yyMinutes = 0; 850176998Sphk yySeconds = 0; 851176998Sphk yyMeridian = MER24; 852176998Sphk yyRelSeconds = 0; 853176998Sphk yyRelMonth = 0; 854176998Sphk yyHaveDate = 0; 855176998Sphk yyHaveDay = 0; 856176998Sphk yyHaveRel = 0; 857176998Sphk yyHaveTime = 0; 858176998Sphk yyHaveZone = 0; 859176998Sphk 860176998Sphk if (yyparse() 861176998Sphk || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1) 862176998Sphk return -1; 863176998Sphk 864176998Sphk if (yyHaveDate || yyHaveTime || yyHaveDay) { 865176998Sphk Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds, 866176998Sphk yyMeridian, yyDSTmode); 867176998Sphk if (Start < 0) 868176998Sphk return -1; 869176998Sphk } 870176998Sphk else { 871176998Sphk Start = nowtime; 872176998Sphk if (!yyHaveRel) 873176998Sphk Start -= ((tm->tm_hour * 60L + tm->tm_min) * 60L) + tm->tm_sec; 874176998Sphk } 875176998Sphk 876176998Sphk Start += yyRelSeconds; 877176998Sphk Start += RelativeMonth(Start, yyRelMonth); 878176998Sphk 879176998Sphk if (yyHaveDay && !yyHaveDate) { 880176998Sphk tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber); 881176998Sphk Start += tod; 882176998Sphk } 883176998Sphk 884176998Sphk /* Have to do *something* with a legitimate -1 so it's distinguishable 885176998Sphk * from the error return value. (Alternately could set errno on error.) */ 886176998Sphk return Start == -1 ? 0 : Start; 887176998Sphk} 888