--- /dev/null
+%{
+/*
+** Originally written by Steven M. Bellovin <smb@research.att.com> while
+** at the University of North Carolina at Chapel Hill. Later tweaked by
+** a couple of people on Usenet. Completely overhauled by Rich $alz
+** <rsalz@bbn.com> and Jim Berets <jberets@bbn.com> in August, 1990;
+**
+** This grammar has 10 shift/reduce conflicts.
+**
+** This code is in the public domain and has no copyright.
+*/
+/* SUPPRESS 287 on yaccpar_sccsid *//* Unused static variable */
+/* SUPPRESS 288 on yyerrlab *//* Label unused */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <stdio.h>
+#ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <stddef.h>
+#else
+# ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+# endif
+#endif /* STDC_HEADERS */
+#ifdef HAVE_STRING_H
+# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
+# include <memory.h>
+# endif
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#if TIME_WITH_SYS_TIME
+# include <time.h>
+#endif
+#include <ctype.h>
+
+#include "missing.h"
+
+
+#define EPOCH 1970
+#define HOUR(x) ((time_t)(x) * 60)
+#define SECSPERDAY (24L * 60L * 60L)
+
+
+/*
+** An entry in the lexical lookup table.
+*/
+typedef struct _TABLE {
+ char *name;
+ int type;
+ time_t value;
+} TABLE;
+
+
+/*
+** Daylight-savings mode: on, off, or not yet known.
+*/
+typedef enum _DSTMODE {
+ DSTon, DSToff, DSTmaybe
+} DSTMODE;
+
+/*
+** Meridian: am, pm, or 24-hour style.
+*/
+typedef enum _MERIDIAN {
+ MERam, MERpm, MER24
+} MERIDIAN;
+
+
+/*
+** Global variables. We could get rid of most of these by using a good
+** union as the yacc stack. (This routine was originally written before
+** yacc had the %union construct.) Maybe someday; right now we only use
+** the %union very rarely.
+*/
+static char *yyInput;
+static DSTMODE yyDSTmode;
+static time_t yyDayOrdinal;
+static time_t yyDayNumber;
+static int yyHaveDate;
+static int yyHaveDay;
+static int yyHaveRel;
+static int yyHaveTime;
+static int yyHaveZone;
+static time_t yyTimezone;
+static time_t yyDay;
+static time_t yyHour;
+static time_t yyMinutes;
+static time_t yyMonth;
+static time_t yySeconds;
+static time_t yyYear;
+static MERIDIAN yyMeridian;
+static time_t yyRelMonth;
+static time_t yyRelSeconds;
+
+static int yyerror(char *s);
+static int yylex(void);
+static int yyparse(void);
+
+%}
+
+%union {
+ time_t Number;
+ enum _MERIDIAN Meridian;
+}
+
+%token tAGO tDAY tDAYZONE tID tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT
+%token tSEC_UNIT tSNUMBER tUNUMBER tZONE tDST
+
+%type <Number> tDAY tDAYZONE tMINUTE_UNIT tMONTH tMONTH_UNIT
+%type <Number> tSEC_UNIT tSNUMBER tUNUMBER tZONE
+%type <Meridian> tMERIDIAN o_merid
+
+%%
+
+spec : /* NULL */
+ | spec item
+ ;
+
+item : time {
+ yyHaveTime++;
+ }
+ | zone {
+ yyHaveZone++;
+ }
+ | date {
+ yyHaveDate++;
+ }
+ | day {
+ yyHaveDay++;
+ }
+ | rel {
+ yyHaveRel++;
+ }
+ | number
+ ;
+
+time : tUNUMBER tMERIDIAN {
+ yyHour = $1;
+ yyMinutes = 0;
+ yySeconds = 0;
+ yyMeridian = $2;
+ }
+ | tUNUMBER ':' tUNUMBER o_merid {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = 0;
+ yyMeridian = $4;
+ }
+ | tUNUMBER ':' tUNUMBER tSNUMBER {
+ yyHour = $1;
+ yyMinutes = $3;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ yyTimezone = - ($4 % 100 + ($4 / 100) * 60);
+ }
+ | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = $5;
+ yyMeridian = $6;
+ }
+ | tUNUMBER ':' tUNUMBER ':' tUNUMBER tSNUMBER {
+ yyHour = $1;
+ yyMinutes = $3;
+ yySeconds = $5;
+ yyMeridian = MER24;
+ yyDSTmode = DSToff;
+ yyTimezone = - ($6 % 100 + ($6 / 100) * 60);
+ }
+ ;
+
+zone : tZONE {
+ yyTimezone = $1;
+ yyDSTmode = DSToff;
+ }
+ | tDAYZONE {
+ yyTimezone = $1;
+ yyDSTmode = DSTon;
+ }
+ |
+ tZONE tDST {
+ yyTimezone = $1;
+ yyDSTmode = DSTon;
+ }
+ ;
+
+day : tDAY {
+ yyDayOrdinal = 1;
+ yyDayNumber = $1;
+ }
+ | tDAY ',' {
+ yyDayOrdinal = 1;
+ yyDayNumber = $1;
+ }
+ | tUNUMBER tDAY {
+ yyDayOrdinal = $1;
+ yyDayNumber = $2;
+ }
+ ;
+
+date : tUNUMBER '/' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $3;
+ }
+ | tUNUMBER '/' tUNUMBER '/' tUNUMBER {
+ if ($1 >= 100) {
+ yyYear = $1;
+ yyMonth = $3;
+ yyDay = $5;
+ } else {
+ yyMonth = $1;
+ yyDay = $3;
+ yyYear = $5;
+ }
+ }
+ | tUNUMBER tSNUMBER tSNUMBER {
+ /* ISO 8601 format. yyyy-mm-dd. */
+ yyYear = $1;
+ yyMonth = -$2;
+ yyDay = -$3;
+ }
+ | tUNUMBER tMONTH tSNUMBER {
+ /* e.g. 17-JUN-1992. */
+ yyDay = $1;
+ yyMonth = $2;
+ yyYear = -$3;
+ }
+ | tMONTH tUNUMBER {
+ yyMonth = $1;
+ yyDay = $2;
+ }
+ | tMONTH tUNUMBER ',' tUNUMBER {
+ yyMonth = $1;
+ yyDay = $2;
+ yyYear = $4;
+ }
+ | tUNUMBER tMONTH {
+ yyMonth = $2;
+ yyDay = $1;
+ }
+ | tUNUMBER tMONTH tUNUMBER {
+ yyMonth = $2;
+ yyDay = $1;
+ yyYear = $3;
+ }
+ ;
+
+rel : relunit tAGO {
+ yyRelSeconds = -yyRelSeconds;
+ yyRelMonth = -yyRelMonth;
+ }
+ | relunit
+ ;
+
+relunit : tUNUMBER tMINUTE_UNIT {
+ yyRelSeconds += $1 * $2 * 60L;
+ }
+ | tSNUMBER tMINUTE_UNIT {
+ yyRelSeconds += $1 * $2 * 60L;
+ }
+ | tMINUTE_UNIT {
+ yyRelSeconds += $1 * 60L;
+ }
+ | tSNUMBER tSEC_UNIT {
+ yyRelSeconds += $1;
+ }
+ | tUNUMBER tSEC_UNIT {
+ yyRelSeconds += $1;
+ }
+ | tSEC_UNIT {
+ yyRelSeconds++;
+ }
+ | tSNUMBER tMONTH_UNIT {
+ yyRelMonth += $1 * $2;
+ }
+ | tUNUMBER tMONTH_UNIT {
+ yyRelMonth += $1 * $2;
+ }
+ | tMONTH_UNIT {
+ yyRelMonth += $1;
+ }
+ ;
+
+number : tUNUMBER {
+ if (yyHaveTime && yyHaveDate && !yyHaveRel)
+ yyYear = $1;
+ else {
+ if($1>10000) {
+ yyHaveDate++;
+ yyDay= ($1)%100;
+ yyMonth= ($1/100)%100;
+ yyYear = $1/10000;
+ }
+ else {
+ yyHaveTime++;
+ if ($1 < 100) {
+ yyHour = $1;
+ yyMinutes = 0;
+ }
+ else {
+ yyHour = $1 / 100;
+ yyMinutes = $1 % 100;
+ }
+ yySeconds = 0;
+ yyMeridian = MER24;
+ }
+ }
+ }
+ ;
+
+o_merid : /* NULL */ {
+ $$ = MER24;
+ }
+ | tMERIDIAN {
+ $$ = $1;
+ }
+ ;
+
+%%
+
+/* Month and day table. */
+static TABLE const MonthDayTable[] = {
+ { "january", tMONTH, 1 },
+ { "february", tMONTH, 2 },
+ { "march", tMONTH, 3 },
+ { "april", tMONTH, 4 },
+ { "may", tMONTH, 5 },
+ { "june", tMONTH, 6 },
+ { "july", tMONTH, 7 },
+ { "august", tMONTH, 8 },
+ { "september", tMONTH, 9 },
+ { "sept", tMONTH, 9 },
+ { "october", tMONTH, 10 },
+ { "november", tMONTH, 11 },
+ { "december", tMONTH, 12 },
+ { "sunday", tDAY, 0 },
+ { "monday", tDAY, 1 },
+ { "tuesday", tDAY, 2 },
+ { "tues", tDAY, 2 },
+ { "wednesday", tDAY, 3 },
+ { "wednes", tDAY, 3 },
+ { "thursday", tDAY, 4 },
+ { "thur", tDAY, 4 },
+ { "thurs", tDAY, 4 },
+ { "friday", tDAY, 5 },
+ { "saturday", tDAY, 6 },
+ { NULL }
+};
+
+/* Time units table. */
+static TABLE const UnitsTable[] = {
+ { "year", tMONTH_UNIT, 12 },
+ { "month", tMONTH_UNIT, 1 },
+ { "fortnight", tMINUTE_UNIT, 14 * 24 * 60 },
+ { "week", tMINUTE_UNIT, 7 * 24 * 60 },
+ { "day", tMINUTE_UNIT, 1 * 24 * 60 },
+ { "hour", tMINUTE_UNIT, 60 },
+ { "minute", tMINUTE_UNIT, 1 },
+ { "min", tMINUTE_UNIT, 1 },
+ { "second", tSEC_UNIT, 1 },
+ { "sec", tSEC_UNIT, 1 },
+ { NULL }
+};
+
+/* Assorted relative-time words. */
+static TABLE const OtherTable[] = {
+ { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 },
+ { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 },
+ { "today", tMINUTE_UNIT, 0 },
+ { "now", tMINUTE_UNIT, 0 },
+ { "last", tUNUMBER, -1 },
+ { "this", tMINUTE_UNIT, 0 },
+ { "next", tUNUMBER, 2 },
+ { "first", tUNUMBER, 1 },
+/* { "second", tUNUMBER, 2 }, */
+ { "third", tUNUMBER, 3 },
+ { "fourth", tUNUMBER, 4 },
+ { "fifth", tUNUMBER, 5 },
+ { "sixth", tUNUMBER, 6 },
+ { "seventh", tUNUMBER, 7 },
+ { "eighth", tUNUMBER, 8 },
+ { "ninth", tUNUMBER, 9 },
+ { "tenth", tUNUMBER, 10 },
+ { "eleventh", tUNUMBER, 11 },
+ { "twelfth", tUNUMBER, 12 },
+ { "ago", tAGO, 1 },
+ { NULL }
+};
+
+/* The timezone table. */
+/* Some of these are commented out because a time_t can't store a float. */
+static TABLE const TimezoneTable[] = {
+ { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */
+ { "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */
+ { "utc", tZONE, HOUR( 0) },
+ { "wet", tZONE, HOUR( 0) }, /* Western European */
+ { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */
+ { "wat", tZONE, HOUR( 1) }, /* West Africa */
+ { "at", tZONE, HOUR( 2) }, /* Azores */
+#if 0
+ /* For completeness. BST is also British Summer, and GST is
+ * also Guam Standard. */
+ { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */
+ { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */
+#endif
+#if 0
+ { "nft", tZONE, HOUR(3.5) }, /* Newfoundland */
+ { "nst", tZONE, HOUR(3.5) }, /* Newfoundland Standard */
+ { "ndt", tDAYZONE, HOUR(3.5) }, /* Newfoundland Daylight */
+#endif
+ { "ast", tZONE, HOUR( 4) }, /* Atlantic Standard */
+ { "adt", tDAYZONE, HOUR( 4) }, /* Atlantic Daylight */
+ { "est", tZONE, HOUR( 5) }, /* Eastern Standard */
+ { "edt", tDAYZONE, HOUR( 5) }, /* Eastern Daylight */
+ { "cst", tZONE, HOUR( 6) }, /* Central Standard */
+ { "cdt", tDAYZONE, HOUR( 6) }, /* Central Daylight */
+ { "mst", tZONE, HOUR( 7) }, /* Mountain Standard */
+ { "mdt", tDAYZONE, HOUR( 7) }, /* Mountain Daylight */
+ { "pst", tZONE, HOUR( 8) }, /* Pacific Standard */
+ { "pdt", tDAYZONE, HOUR( 8) }, /* Pacific Daylight */
+ { "yst", tZONE, HOUR( 9) }, /* Yukon Standard */
+ { "ydt", tDAYZONE, HOUR( 9) }, /* Yukon Daylight */
+ { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */
+ { "hdt", tDAYZONE, HOUR(10) }, /* Hawaii Daylight */
+ { "cat", tZONE, HOUR(10) }, /* Central Alaska */
+ { "ahst", tZONE, HOUR(10) }, /* Alaska-Hawaii Standard */
+ { "nt", tZONE, HOUR(11) }, /* Nome */
+ { "idlw", tZONE, HOUR(12) }, /* International Date Line West */
+ { "cet", tZONE, -HOUR(1) }, /* Central European */
+ { "met", tZONE, -HOUR(1) }, /* Middle European */
+ { "mewt", tZONE, -HOUR(1) }, /* Middle European Winter */
+ { "mest", tDAYZONE, -HOUR(1) }, /* Middle European Summer */
+ { "swt", tZONE, -HOUR(1) }, /* Swedish Winter */
+ { "sst", tDAYZONE, -HOUR(1) }, /* Swedish Summer */
+ { "fwt", tZONE, -HOUR(1) }, /* French Winter */
+ { "fst", tDAYZONE, -HOUR(1) }, /* French Summer */
+ { "eet", tZONE, -HOUR(2) }, /* Eastern Europe, USSR Zone 1 */
+ { "bt", tZONE, -HOUR(3) }, /* Baghdad, USSR Zone 2 */
+#if 0
+ { "it", tZONE, -HOUR(3.5) },/* Iran */
+#endif
+ { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */
+ { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */
+#if 0
+ { "ist", tZONE, -HOUR(5.5) },/* Indian Standard */
+#endif
+ { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */
+#if 0
+ /* For completeness. NST is also Newfoundland Stanard, and SST is
+ * also Swedish Summer. */
+ { "nst", tZONE, -HOUR(6.5) },/* North Sumatra */
+ { "sst", tZONE, -HOUR(7) }, /* South Sumatra, USSR Zone 6 */
+#endif /* 0 */
+ { "wast", tZONE, -HOUR(7) }, /* West Australian Standard */
+ { "wadt", tDAYZONE, -HOUR(7) }, /* West Australian Daylight */
+#if 0
+ { "jt", tZONE, -HOUR(7.5) },/* Java (3pm in Cronusland!) */
+#endif
+ { "cct", tZONE, -HOUR(8) }, /* China Coast, USSR Zone 7 */
+ { "jst", tZONE, -HOUR(9) }, /* Japan Standard, USSR Zone 8 */
+#if 0
+ { "cast", tZONE, -HOUR(9.5) },/* Central Australian Standard */
+ { "cadt", tDAYZONE, -HOUR(9.5) },/* Central Australian Daylight */
+#endif
+ { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */
+ { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */
+ { "gst", tZONE, -HOUR(10) }, /* Guam Standard, USSR Zone 9 */
+ { "nzt", tZONE, -HOUR(12) }, /* New Zealand */
+ { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */
+ { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */
+ { "idle", tZONE, -HOUR(12) }, /* International Date Line East */
+ { NULL }
+};
+
+/* Military timezone table. */
+static TABLE const MilitaryTable[] = {
+ { "a", tZONE, HOUR( 1) },
+ { "b", tZONE, HOUR( 2) },
+ { "c", tZONE, HOUR( 3) },
+ { "d", tZONE, HOUR( 4) },
+ { "e", tZONE, HOUR( 5) },
+ { "f", tZONE, HOUR( 6) },
+ { "g", tZONE, HOUR( 7) },
+ { "h", tZONE, HOUR( 8) },
+ { "i", tZONE, HOUR( 9) },
+ { "k", tZONE, HOUR( 10) },
+ { "l", tZONE, HOUR( 11) },
+ { "m", tZONE, HOUR( 12) },
+ { "n", tZONE, HOUR(- 1) },
+ { "o", tZONE, HOUR(- 2) },
+ { "p", tZONE, HOUR(- 3) },
+ { "q", tZONE, HOUR(- 4) },
+ { "r", tZONE, HOUR(- 5) },
+ { "s", tZONE, HOUR(- 6) },
+ { "t", tZONE, HOUR(- 7) },
+ { "u", tZONE, HOUR(- 8) },
+ { "v", tZONE, HOUR(- 9) },
+ { "w", tZONE, HOUR(-10) },
+ { "x", tZONE, HOUR(-11) },
+ { "y", tZONE, HOUR(-12) },
+ { "z", tZONE, HOUR( 0) },
+ { NULL }
+};
+
+\f
+
+
+/* ARGSUSED */
+static int
+yyerror(s)
+ char *s;
+{
+ return 0;
+}
+
+
+static time_t
+ToSeconds(Hours, Minutes, Seconds, Meridian)
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+{
+ if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 59)
+ return -1;
+ switch (Meridian) {
+ case MER24:
+ if (Hours < 0 || Hours > 23)
+ return -1;
+ return (Hours * 60L + Minutes) * 60L + Seconds;
+ case MERam:
+ if (Hours < 1 || Hours > 12)
+ return -1;
+ if (Hours == 12)
+ Hours = 0;
+ return (Hours * 60L + Minutes) * 60L + Seconds;
+ case MERpm:
+ if (Hours < 1 || Hours > 12)
+ return -1;
+ if (Hours == 12)
+ Hours = 0;
+ return ((Hours + 12) * 60L + Minutes) * 60L + Seconds;
+ default:
+ abort ();
+ }
+ /* NOTREACHED */
+}
+
+
+/* Year is either
+ * A negative number, which means to use its absolute value (why?)
+ * A number from 0 to 99, which means a year from 1900 to 1999, or
+ * The actual year (>=100). */
+static time_t
+Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode)
+ time_t Month;
+ time_t Day;
+ time_t Year;
+ time_t Hours;
+ time_t Minutes;
+ time_t Seconds;
+ MERIDIAN Meridian;
+ DSTMODE DSTmode;
+{
+ static int DaysInMonth[12] = {
+ 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
+ };
+ time_t tod;
+ time_t Julian;
+ int i;
+
+ if (Year < 0)
+ Year = -Year;
+ if (Year < 69)
+ Year += 2000;
+ else if (Year < 100) {
+ Year += 1900;
+ if (Year < EPOCH)
+ Year += 100;
+ }
+ DaysInMonth[1] = Year % 4 == 0 && (Year % 100 != 0 || Year % 400 == 0)
+ ? 29 : 28;
+ /* Checking for 2038 bogusly assumes that time_t is 32 bits. But
+ I'm too lazy to try to check for time_t overflow in another way. */
+ if (Year < EPOCH || Year > 2038
+ || Month < 1 || Month > 12
+ /* Lint fluff: "conversion from long may lose accuracy" */
+ || Day < 1 || Day > DaysInMonth[(int)--Month])
+ return -1;
+
+ for (Julian = Day - 1, i = 0; i < Month; i++)
+ Julian += DaysInMonth[i];
+ for (i = EPOCH; i < Year; i++)
+ Julian += 365 + (i % 4 == 0);
+ Julian *= SECSPERDAY;
+ Julian += yyTimezone * 60L;
+ if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0)
+ return -1;
+ Julian += tod;
+ if (DSTmode == DSTon
+ || (DSTmode == DSTmaybe && localtime(&Julian)->tm_isdst))
+ Julian -= 60 * 60;
+ return Julian;
+}
+
+
+static time_t
+DSTcorrect(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) * 60L * 60L;
+}
+
+
+static time_t
+RelativeDate(Start, DayOrdinal, DayNumber)
+ time_t Start;
+ time_t DayOrdinal;
+ time_t DayNumber;
+{
+ struct tm *tm;
+ time_t now;
+
+ now = Start;
+ tm = localtime(&now);
+ now += SECSPERDAY * ((DayNumber - tm->tm_wday + 7) % 7);
+ now += 7 * SECSPERDAY * (DayOrdinal <= 0 ? DayOrdinal : DayOrdinal - 1);
+ return DSTcorrect(Start, now);
+}
+
+
+static time_t
+RelativeMonth(Start, RelMonth)
+ time_t Start;
+ time_t RelMonth;
+{
+ struct tm *tm;
+ time_t Month;
+ time_t Year;
+
+ if (RelMonth == 0)
+ return 0;
+ tm = localtime(&Start);
+ Month = 12 * (tm->tm_year + 1900) + tm->tm_mon + RelMonth;
+ Year = Month / 12;
+ Month = Month % 12 + 1;
+ return DSTcorrect(Start,
+ Convert(Month, (time_t)tm->tm_mday, Year,
+ (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec,
+ MER24, DSTmaybe));
+}
+
+
+static int
+LookupWord(buff)
+ char *buff;
+{
+ char *p;
+ char *q;
+ const TABLE *tp;
+ int i;
+ int abbrev;
+
+ /* Make it lowercase. */
+ for (p = buff; *p; p++)
+ if (isupper((unsigned char)*p))
+ *p = tolower((unsigned char)*p);
+
+ if (strcmp(buff, "am") == 0 || strcmp(buff, "a.m.") == 0) {
+ yylval.Meridian = MERam;
+ return tMERIDIAN;
+ }
+ if (strcmp(buff, "pm") == 0 || strcmp(buff, "p.m.") == 0) {
+ yylval.Meridian = MERpm;
+ return tMERIDIAN;
+ }
+
+ /* See if we have an abbreviation for a month. */
+ if (strlen(buff) == 3)
+ abbrev = 1;
+ else if (strlen(buff) == 4 && buff[3] == '.') {
+ abbrev = 1;
+ buff[3] = '\0';
+ }
+ else
+ abbrev = 0;
+
+ for (tp = MonthDayTable; tp->name; tp++) {
+ if (abbrev) {
+ if (strncmp(buff, tp->name, 3) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+ else if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ for (tp = TimezoneTable; tp->name; tp++)
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ if (strcmp(buff, "dst") == 0)
+ return tDST;
+
+ for (tp = UnitsTable; tp->name; tp++)
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Strip off any plural and try the units table again. */
+ i = strlen(buff) - 1;
+ if (buff[i] == 's') {
+ buff[i] = '\0';
+ for (tp = UnitsTable; tp->name; tp++)
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ buff[i] = 's'; /* Put back for "this" in OtherTable. */
+ }
+
+ for (tp = OtherTable; tp->name; tp++)
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ /* Military timezones. */
+ if (buff[1] == '\0' && isalpha((unsigned char)*buff)) {
+ for (tp = MilitaryTable; tp->name; tp++)
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+ }
+
+ /* Drop out any periods and try the timezone table again. */
+ for (i = 0, p = q = buff; *q; q++)
+ if (*q != '.')
+ *p++ = *q;
+ else
+ i++;
+ *p = '\0';
+ if (i)
+ for (tp = TimezoneTable; tp->name; tp++)
+ if (strcmp(buff, tp->name) == 0) {
+ yylval.Number = tp->value;
+ return tp->type;
+ }
+
+ return tID;
+}
+
+
+static int
+yylex()
+{
+ char c;
+ char *p;
+ char buff[20];
+ int Count;
+ int sign;
+
+ for ( ; ; ) {
+ while (isspace((unsigned char)*yyInput))
+ yyInput++;
+
+ if (isdigit((unsigned char)(c = *yyInput)) || c == '-' || c == '+') {
+ if (c == '-' || c == '+') {
+ sign = c == '-' ? -1 : 1;
+ if (!isdigit((unsigned char)*++yyInput))
+ /* skip the '-' sign */
+ continue;
+ }
+ else
+ sign = 0;
+ for (yylval.Number = 0; isdigit((unsigned char)(c = *yyInput++)); )
+ yylval.Number = 10 * yylval.Number + c - '0';
+ yyInput--;
+ if (sign < 0)
+ yylval.Number = -yylval.Number;
+ return sign ? tSNUMBER : tUNUMBER;
+ }
+ if (isalpha((unsigned char)c)) {
+ for (p = buff; isalpha((unsigned char)(c = *yyInput++)) || c == '.'; )
+ if (p < &buff[sizeof buff - 1])
+ *p++ = c;
+ *p = '\0';
+ yyInput--;
+ return LookupWord(buff);
+ }
+ if (c != '(')
+ return *yyInput++;
+ Count = 0;
+ do {
+ c = *yyInput++;
+ if (c == '\0')
+ return c;
+ if (c == '(')
+ Count++;
+ else if (c == ')')
+ Count--;
+ } while (Count > 0);
+ }
+}
+
+#define TM_YEAR_ORIGIN 1900
+
+/* Yield A - B, measured in seconds. */
+static long
+difftm (a, b)
+ struct tm *a, *b;
+{
+ int ay = a->tm_year + (TM_YEAR_ORIGIN - 1);
+ int by = b->tm_year + (TM_YEAR_ORIGIN - 1);
+ int days = (
+ /* difference in day of year */
+ a->tm_yday - b->tm_yday
+ /* + intervening leap days */
+ + ((ay >> 2) - (by >> 2))
+ - (ay/100 - by/100)
+ + ((ay/100 >> 2) - (by/100 >> 2))
+ /* + difference in years * 365 */
+ + (long)(ay-by) * 365
+ );
+ return (60*(60*(24*days + (a->tm_hour - b->tm_hour))
+ + (a->tm_min - b->tm_min))
+ + (a->tm_sec - b->tm_sec));
+}
+
+time_t
+get_date(p)
+ char *p;
+{
+ struct tm *tm, *gmt, gmtbuf;
+ time_t Start;
+ time_t tod;
+ time_t now;
+ time_t timezone;
+
+ yyInput = p;
+ (void)time (&now);
+
+ gmt = gmtime (&now);
+ if (gmt != NULL)
+ {
+ /* Make a copy, in case localtime modifies *tm (I think
+ that comment now applies to *gmt, but I am too
+ lazy to dig into how gmtime and locatime allocate the
+ structures they return pointers to). */
+ gmtbuf = *gmt;
+ gmt = &gmtbuf;
+ }
+
+ if (! (tm = localtime (&now)))
+ return -1;
+
+ if (gmt != NULL)
+ timezone = difftm (gmt, tm) / 60;
+ else
+ /* We are on a system like VMS, where the system clock is
+ in local time and the system has no concept of timezones.
+ Hopefully we can fake this out (for the case in which the
+ user specifies no timezone) by just saying the timezone
+ is zero. */
+ timezone = 0;
+
+ if(tm->tm_isdst)
+ timezone += 60;
+
+ tm = localtime(&now);
+ yyYear = tm->tm_year + 1900;
+ yyMonth = tm->tm_mon + 1;
+ yyDay = tm->tm_mday;
+ yyTimezone = timezone;
+ yyDSTmode = DSTmaybe;
+ yyHour = 0;
+ yyMinutes = 0;
+ yySeconds = 0;
+ yyMeridian = MER24;
+ yyRelSeconds = 0;
+ yyRelMonth = 0;
+ yyHaveDate = 0;
+ yyHaveDay = 0;
+ yyHaveRel = 0;
+ yyHaveTime = 0;
+ yyHaveZone = 0;
+
+ if (yyparse()
+ || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1)
+ return -1;
+
+ if (yyHaveDate || yyHaveTime || yyHaveDay) {
+ Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds,
+ yyMeridian, yyDSTmode);
+ if (Start < 0)
+ return -1;
+ }
+ else {
+ Start = now;
+ if (!yyHaveRel)
+ Start -= ((tm->tm_hour * 60L + tm->tm_min) * 60L) + tm->tm_sec;
+ }
+
+ Start += yyRelSeconds;
+ Start += RelativeMonth(Start, yyRelMonth);
+
+ if (yyHaveDay && !yyHaveDate) {
+ tod = RelativeDate(Start, yyDayOrdinal, yyDayNumber);
+ Start += tod;
+ }
+
+ /* Have to do *something* with a legitimate -1 so it's distinguishable
+ * from the error return value. (Alternately could set errno on error.) */
+ return Start == -1 ? 0 : Start;
+}
+
+
+#if defined(TEST)
+
+/* ARGSUSED */
+int
+main(ac, av)
+ int ac;
+ char *av[];
+{
+ char buff[128];
+ time_t d;
+
+ (void)printf("Enter date, or blank line to exit.\n\t> ");
+ (void)fflush(stdout);
+ while (gets(buff) && buff[0]) {
+ d = get_date(buff);
+ if (d == -1)
+ (void)printf("Bad format - couldn't convert.\n");
+ else
+ (void)printf("%s", ctime(&d));
+ (void)printf("\t> ");
+ (void)fflush(stdout);
+ }
+ exit(0);
+ /* NOTREACHED */
+}
+#endif /* defined(TEST) */
projects / debian / sudo / blobdiff