%{ /* $Id: parsedate.y,v 1.9.2.1 2000/12/26 08:39:49 kondou Exp $ ** $FreeBSD$ ** ** Originally written by Steven M. Bellovin while ** at the University of North Carolina at Chapel Hill. Later tweaked by ** a couple of people on Usenet. Completely overhauled by Rich $alz ** and Jim Berets in August, 1990. ** Further revised (removed obsolete constructs and cleaned up timezone ** names) in August, 1991, by Rich. Paul Eggert ** helped in September, 1992. ** ** This grammar has six shift/reduce conflicts. ** ** This code is in the public domain and has no copyright. */ /* SUPPRESS 530 *//* Empty body for statement */ /* SUPPRESS 593 on yyerrlab *//* Label was not used */ /* SUPPRESS 593 on yynewstate *//* Label was not used */ /* SUPPRESS 595 on yypvt *//* Automatic variable may be used before set */ #include #include #include #include #include #include #include #include "find.h" #define CTYPE(isXXXXX, c) (isXXXXX((c))) #define SIZEOF(array) (sizeof array / sizeof array[0]) #define ENDOF(array) (&array[SIZEOF(array)]) typedef const char *STRING; typedef struct timeb TIMEINFO; #define yylhs date_yylhs #define yylen date_yylen #define yydefred date_yydefred #define yydgoto date_yydgoto #define yysindex date_yysindex #define yyrindex date_yyrindex #define yygindex date_yygindex #define yytable date_yytable #define yycheck date_yycheck #define yyparse date_parse #define yylex date_lex #define yyerror date_error static int date_lex(void); int yyparse(void); /* See the LeapYears table in Convert. */ #define EPOCH 1970 #define END_OF_TIME 2038 /* Constants for general time calculations. */ #define DST_OFFSET 1 #define SECSPERDAY (24L * 60L * 60L) /* Readability for TABLE stuff. */ #define HOUR(x) (x * 60) #define LPAREN '(' #define RPAREN ')' #define IS7BIT(x) ((unsigned int)(x) < 0200) /* ** An entry in the lexical lookup table. */ typedef struct _TABLE { STRING 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 them by using a yacc ** union, but this is more efficient. (This routine predates the ** yacc %union construct.) */ static char *yyInput; static DSTMODE yyDSTmode; static int yyHaveDate; static int yyHaveRel; static int yyHaveTime; 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 void date_error(const char *); %} %union { time_t Number; enum _MERIDIAN Meridian; } %token tDAY tDAYZONE tMERIDIAN tMONTH tMONTH_UNIT tSEC_UNIT tSNUMBER %token tUNUMBER tZONE %type tDAYZONE tMONTH tMONTH_UNIT tSEC_UNIT %type tSNUMBER tUNUMBER tZONE numzone zone %type tMERIDIAN o_merid %% spec : /* NULL */ | spec item ; item : time { yyHaveTime++; #if defined(lint) /* I am compulsive about lint natterings... */ if (yyHaveTime == -1) { YYERROR; } #endif /* defined(lint) */ } | time zone { yyHaveTime++; yyTimezone = $2; } | date { yyHaveDate++; } | rel { yyHaveRel = 1; } ; time : tUNUMBER o_merid { if ($1 < 100) { yyHour = $1; yyMinutes = 0; } else { yyHour = $1 / 100; yyMinutes = $1 % 100; } yySeconds = 0; yyMeridian = $2; } | tUNUMBER ':' tUNUMBER o_merid { yyHour = $1; yyMinutes = $3; yySeconds = 0; yyMeridian = $4; } | tUNUMBER ':' tUNUMBER numzone { yyHour = $1; yyMinutes = $3; yyTimezone = $4; yyMeridian = MER24; yyDSTmode = DSToff; } | tUNUMBER ':' tUNUMBER ':' tUNUMBER o_merid { yyHour = $1; yyMinutes = $3; yySeconds = $5; yyMeridian = $6; } | tUNUMBER ':' tUNUMBER ':' tUNUMBER numzone { yyHour = $1; yyMinutes = $3; yySeconds = $5; yyTimezone = $6; yyMeridian = MER24; yyDSTmode = DSToff; } ; zone : tZONE { $$ = $1; yyDSTmode = DSToff; } | tDAYZONE { $$ = $1; yyDSTmode = DSTon; } | tZONE numzone { /* Only allow "GMT+300" and "GMT-0800" */ if ($1 != 0) { YYABORT; } $$ = $2; yyDSTmode = DSToff; } | numzone { $$ = $1; yyDSTmode = DSToff; } ; numzone : tSNUMBER { int i; /* Unix and GMT and numeric timezones -- a little confusing. */ if ($1 < 0) { /* Don't work with negative modulus. */ $1 = -$1; if ($1 > 9999 || (i = $1 % 100) >= 60) { YYABORT; } $$ = ($1 / 100) * 60 + i; } else { if ($1 > 9999 || (i = $1 % 100) >= 60) { YYABORT; } $$ = -(($1 / 100) * 60 + i); } } ; date : tUNUMBER '/' tUNUMBER { yyMonth = $1; yyDay = $3; } | tUNUMBER '/' tUNUMBER '/' tUNUMBER { if ($1 > 100) { /* assume YYYY/MM/DD format, so need not to add 1900 */ if ($1 > 999) { yyYear = $1; } else { yyYear = 1900 + $1; } yyMonth = $3; yyDay = $5; } else { /* assume MM/DD/YY* format */ yyMonth = $1; yyDay = $3; if ($5 > 999) { /* assume year is YYYY format, so need not to add 1900 */ yyYear = $5; } else if ($5 < 100) { /* assume year is YY format, so need to add 1900 */ yyYear = $5 + (yyYear / 100 + (yyYear % 100 - $5) / 50) * 100; } else { yyYear = 1900 + $5; } } } | tMONTH tUNUMBER { yyMonth = $1; yyDay = $2; } | tMONTH tUNUMBER ',' tUNUMBER { yyMonth = $1; yyDay = $2; if ($4 > 999) { /* assume year is YYYY format, so need not to add 1900 */ yyYear = $4; } else if ($4 < 100) { /* assume year is YY format, so need to add 1900 */ yyYear = $4 + (yyYear / 100 + (yyYear % 100 - $4) / 50) * 100; } else { yyYear = 1900 + $4; } } | tUNUMBER tMONTH { yyDay = $1; yyMonth = $2; } | tUNUMBER tMONTH tUNUMBER { yyDay = $1; yyMonth = $2; if ($3 > 999) { /* assume year is YYYY format, so need not to add 1900 */ yyYear = $3; } else if ($3 < 100) { /* assume year is YY format, so need to add 1900 */ yyYear = $3 + (yyYear / 100 + (yyYear % 100 - $3) / 50) * 100; } else { yyYear = 1900 + $3; } } | tDAY ',' tUNUMBER tMONTH tUNUMBER { yyDay = $3; yyMonth = $4; if ($5 > 999) { /* assume year is YYYY format, so need not to add 1900 */ yyYear = $5; } else if ($5 < 100) { /* assume year is YY format, so need to add 1900 */ yyYear = $5 + (yyYear / 100 + (yyYear % 100 - $5) / 50) * 100; } else { yyYear = 1900 + $5; } } ; rel : tSNUMBER tSEC_UNIT { yyRelSeconds += $1 * $2; } | tUNUMBER tSEC_UNIT { yyRelSeconds += $1 * $2; } | tSNUMBER tMONTH_UNIT { yyRelMonth += $1 * $2; } | tUNUMBER tMONTH_UNIT { yyRelMonth += $1 * $2; } ; o_merid : /* NULL */ { $$ = MER24; } | tMERIDIAN { $$ = $1; } ; %% /* Month and day table. */ static TABLE 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 }, { "october", tMONTH, 10 }, { "november", tMONTH, 11 }, { "december", tMONTH, 12 }, /* The value of the day isn't used... */ { "sunday", tDAY, 0 }, { "monday", tDAY, 0 }, { "tuesday", tDAY, 0 }, { "wednesday", tDAY, 0 }, { "thursday", tDAY, 0 }, { "friday", tDAY, 0 }, { "saturday", tDAY, 0 }, }; /* Time units table. */ static TABLE UnitsTable[] = { { "year", tMONTH_UNIT, 12 }, { "month", tMONTH_UNIT, 1 }, { "week", tSEC_UNIT, 7 * 24 * 60 * 60 }, { "day", tSEC_UNIT, 1 * 24 * 60 * 60 }, { "hour", tSEC_UNIT, 60 * 60 }, { "minute", tSEC_UNIT, 60 }, { "min", tSEC_UNIT, 60 }, { "second", tSEC_UNIT, 1 }, { "sec", tSEC_UNIT, 1 }, }; /* Timezone table. */ static TABLE TimezoneTable[] = { { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */ { "ut", tZONE, HOUR( 0) }, /* Universal */ { "utc", tZONE, HOUR( 0) }, /* Universal Coordinated */ { "cut", tZONE, HOUR( 0) }, /* Coordinated Universal */ { "z", tZONE, HOUR( 0) }, /* Greenwich Mean */ { "wet", tZONE, HOUR( 0) }, /* Western European */ { "bst", tDAYZONE, HOUR( 0) }, /* British Summer */ { "nst", tZONE, HOUR(3)+30 }, /* Newfoundland Standard */ { "ndt", tDAYZONE, HOUR(3)+30 }, /* Newfoundland Daylight */ { "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 */ { "akst", tZONE, HOUR( 9) }, /* Alaska Standard */ { "akdt", tDAYZONE, HOUR( 9) }, /* Alaska Daylight */ { "hst", tZONE, HOUR(10) }, /* Hawaii Standard */ { "hast", tZONE, HOUR(10) }, /* Hawaii-Aleutian Standard */ { "hadt", tDAYZONE, HOUR(10) }, /* Hawaii-Aleutian Daylight */ { "ces", tDAYZONE, -HOUR(1) }, /* Central European Summer */ { "cest", tDAYZONE, -HOUR(1) }, /* Central European Summer */ { "mez", tZONE, -HOUR(1) }, /* Middle European */ { "mezt", tDAYZONE, -HOUR(1) }, /* Middle European Summer */ { "cet", tZONE, -HOUR(1) }, /* Central European */ { "met", tZONE, -HOUR(1) }, /* Middle European */ { "eet", tZONE, -HOUR(2) }, /* Eastern Europe */ { "msk", tZONE, -HOUR(3) }, /* Moscow Winter */ { "msd", tDAYZONE, -HOUR(3) }, /* Moscow Summer */ { "wast", tZONE, -HOUR(8) }, /* West Australian Standard */ { "wadt", tDAYZONE, -HOUR(8) }, /* West Australian Daylight */ { "hkt", tZONE, -HOUR(8) }, /* Hong Kong */ { "cct", tZONE, -HOUR(8) }, /* China Coast */ { "jst", tZONE, -HOUR(9) }, /* Japan Standard */ { "kst", tZONE, -HOUR(9) }, /* Korean Standard */ { "kdt", tZONE, -HOUR(9) }, /* Korean Daylight */ { "cast", tZONE, -(HOUR(9)+30) }, /* Central Australian Standard */ { "cadt", tDAYZONE, -(HOUR(9)+30) }, /* Central Australian Daylight */ { "east", tZONE, -HOUR(10) }, /* Eastern Australian Standard */ { "eadt", tDAYZONE, -HOUR(10) }, /* Eastern Australian Daylight */ { "nzst", tZONE, -HOUR(12) }, /* New Zealand Standard */ { "nzdt", tDAYZONE, -HOUR(12) }, /* New Zealand Daylight */ /* For completeness we include the following entries. */ #if 0 /* Duplicate names. Either they conflict with a zone listed above * (which is either more likely to be seen or just been in circulation * longer), or they conflict with another zone in this section and * we could not reasonably choose one over the other. */ { "fst", tZONE, HOUR( 2) }, /* Fernando De Noronha Standard */ { "fdt", tDAYZONE, HOUR( 2) }, /* Fernando De Noronha Daylight */ { "bst", tZONE, HOUR( 3) }, /* Brazil Standard */ { "est", tZONE, HOUR( 3) }, /* Eastern Standard (Brazil) */ { "edt", tDAYZONE, HOUR( 3) }, /* Eastern Daylight (Brazil) */ { "wst", tZONE, HOUR( 4) }, /* Western Standard (Brazil) */ { "wdt", tDAYZONE, HOUR( 4) }, /* Western Daylight (Brazil) */ { "cst", tZONE, HOUR( 5) }, /* Chile Standard */ { "cdt", tDAYZONE, HOUR( 5) }, /* Chile Daylight */ { "ast", tZONE, HOUR( 5) }, /* Acre Standard */ { "adt", tDAYZONE, HOUR( 5) }, /* Acre Daylight */ { "cst", tZONE, HOUR( 5) }, /* Cuba Standard */ { "cdt", tDAYZONE, HOUR( 5) }, /* Cuba Daylight */ { "est", tZONE, HOUR( 6) }, /* Easter Island Standard */ { "edt", tDAYZONE, HOUR( 6) }, /* Easter Island Daylight */ { "sst", tZONE, HOUR(11) }, /* Samoa Standard */ { "ist", tZONE, -HOUR(2) }, /* Israel Standard */ { "idt", tDAYZONE, -HOUR(2) }, /* Israel Daylight */ { "idt", tDAYZONE, -(HOUR(3)+30) }, /* Iran Daylight */ { "ist", tZONE, -(HOUR(3)+30) }, /* Iran Standard */ { "cst", tZONE, -HOUR(8) }, /* China Standard */ { "cdt", tDAYZONE, -HOUR(8) }, /* China Daylight */ { "sst", tZONE, -HOUR(8) }, /* Singapore Standard */ /* Dubious (e.g., not in Olson's TIMEZONE package) or obsolete. */ { "gst", tZONE, HOUR( 3) }, /* Greenland Standard */ { "wat", tZONE, -HOUR(1) }, /* West Africa */ { "at", tZONE, HOUR( 2) }, /* Azores */ { "gst", tZONE, -HOUR(10) }, /* Guam Standard */ { "nft", tZONE, HOUR(3)+30 }, /* Newfoundland */ { "idlw", tZONE, HOUR(12) }, /* International Date Line West */ { "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 */ { "bt", tZONE, -HOUR(3) }, /* Baghdad */ { "it", tZONE, -(HOUR(3)+30) }, /* Iran */ { "zp4", tZONE, -HOUR(4) }, /* USSR Zone 3 */ { "zp5", tZONE, -HOUR(5) }, /* USSR Zone 4 */ { "ist", tZONE, -(HOUR(5)+30) }, /* Indian Standard */ { "zp6", tZONE, -HOUR(6) }, /* USSR Zone 5 */ { "nst", tZONE, -HOUR(7) }, /* North Sumatra */ { "sst", tZONE, -HOUR(7) }, /* South Sumatra */ { "jt", tZONE, -(HOUR(7)+30) }, /* Java (3pm in Cronusland!) */ { "nzt", tZONE, -HOUR(12) }, /* New Zealand */ { "idle", tZONE, -HOUR(12) }, /* International Date Line East */ { "cat", tZONE, HOUR(10) }, /* -- expired 1967 */ { "nt", tZONE, HOUR(11) }, /* -- expired 1967 */ { "ahst", tZONE, HOUR(10) }, /* -- expired 1983 */ { "hdt", tDAYZONE, HOUR(10) }, /* -- expired 1986 */ #endif /* 0 */ }; static int GetTimeInfo(TIMEINFO *Now) { static time_t NextHour; static long LastTzone; struct tm *tm; int secondsUntilNextHour; struct timeval tv; /* Get the basic time. */ if (gettimeofday(&tv, (struct timezone *) 0) == -1) return -1; Now->time = tv.tv_sec; Now->millitm = tv.tv_usec; /* Now get the timezone if the last time < HH:00:00 <= now for some HH. */ if (NextHour <= Now->time) { tm = localtime(&Now->time); if (tm == NULL) return -1; secondsUntilNextHour = 60 * (60 - tm->tm_min) - tm->tm_sec; LastTzone = (0 - tm->tm_gmtoff) / 60; NextHour = Now->time + secondsUntilNextHour; } Now->timezone = LastTzone; return 0; } /* ARGSUSED */ static void date_error(const char *s __unused) { /* NOTREACHED */ } static time_t ToSeconds(time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian) { if (Minutes < 0 || Minutes > 59 || Seconds < 0 || Seconds > 61) return -1; if (Meridian == MER24) { if (Hours < 0 || Hours > 23) return -1; } else { if (Hours < 1 || Hours > 12) return -1; if (Hours == 12) Hours = 0; if (Meridian == MERpm) Hours += 12; } return (Hours * 60L + Minutes) * 60L + Seconds; } static time_t Convert(time_t Month, time_t Day, time_t Year, time_t Hours, time_t Minutes, time_t Seconds, MERIDIAN Meridian, DSTMODE dst) { static int DaysNormal[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; static int DaysLeap[13] = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; static int LeapYears[] = { 1972, 1976, 1980, 1984, 1988, 1992, 1996, 2000, 2004, 2008, 2012, 2016, 2020, 2024, 2028, 2032, 2036 }; int *yp; int *mp; time_t Julian; int i; time_t tod; /* Year should not be passed as a relative value, but absolute one. so this should not happen, but just ensure it */ if (Year < 0) Year = -Year; if (Year < 100) { Year += 1900; if (Year < EPOCH) Year += 100; } for (mp = DaysNormal, yp = LeapYears; yp < ENDOF(LeapYears); yp++) if (Year == *yp) { mp = DaysLeap; break; } if (Year < EPOCH || Year > END_OF_TIME || Month < 1 || Month > 12 /* NOSTRICT *//* conversion from long may lose accuracy */ || Day < 1 || Day > mp[(int)Month]) return -1; Julian = Day - 1 + (Year - EPOCH) * 365; for (yp = LeapYears; yp < ENDOF(LeapYears); yp++, Julian++) if (Year <= *yp) break; for (i = 1; i < Month; i++) Julian += *++mp; Julian *= SECSPERDAY; Julian += yyTimezone * 60L; if ((tod = ToSeconds(Hours, Minutes, Seconds, Meridian)) < 0) return -1; Julian += tod; tod = Julian; if (dst == DSTon || (dst == DSTmaybe && localtime(&tod)->tm_isdst)) Julian -= DST_OFFSET * 60 * 60; return Julian; } static time_t DSTcorrect(time_t Start, time_t Future) { time_t StartDay; time_t FutureDay; StartDay = (localtime(&Start)->tm_hour + 1) % 24; FutureDay = (localtime(&Future)->tm_hour + 1) % 24; return (Future - Start) + (StartDay - FutureDay) * DST_OFFSET * 60 * 60; } static time_t RelativeMonth(time_t Start, time_t RelMonth) { struct tm *tm; time_t Month; time_t Year; tm = localtime(&Start); Month = 12 * tm->tm_year + tm->tm_mon + RelMonth; Year = Month / 12; Year += 1900; Month = Month % 12 + 1; return DSTcorrect(Start, Convert(Month, (time_t)tm->tm_mday, Year, (time_t)tm->tm_hour, (time_t)tm->tm_min, (time_t)tm->tm_sec, MER24, DSTmaybe)); } static int LookupWord(char *buff, int length) { char *p; STRING q; TABLE *tp; int c; p = buff; c = p[0]; /* See if we have an abbreviation for a month. */ if (length == 3 || (length == 4 && p[3] == '.')) for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++) { q = tp->name; if (c == q[0] && p[1] == q[1] && p[2] == q[2]) { yylval.Number = tp->value; return tp->type; } } else for (tp = MonthDayTable; tp < ENDOF(MonthDayTable); tp++) if (c == tp->name[0] && strcmp(p, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } /* Try for a timezone. */ for (tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++) if (c == tp->name[0] && p[1] == tp->name[1] && strcmp(p, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } /* Try the units table. */ for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++) if (c == tp->name[0] && strcmp(p, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } /* Strip off any plural and try the units table again. */ if (--length > 0 && p[length] == 's') { p[length] = '\0'; for (tp = UnitsTable; tp < ENDOF(UnitsTable); tp++) if (c == tp->name[0] && strcmp(p, tp->name) == 0) { p[length] = 's'; yylval.Number = tp->value; return tp->type; } p[length] = 's'; } length++; /* Drop out any periods. */ for (p = buff, q = (STRING)buff; *q; q++) if (*q != '.') *p++ = *q; *p = '\0'; /* Try the meridians. */ if (buff[1] == 'm' && buff[2] == '\0') { if (buff[0] == 'a') { yylval.Meridian = MERam; return tMERIDIAN; } if (buff[0] == 'p') { yylval.Meridian = MERpm; return tMERIDIAN; } } /* If we saw any periods, try the timezones again. */ if (p - buff != length) { c = buff[0]; for (p = buff, tp = TimezoneTable; tp < ENDOF(TimezoneTable); tp++) if (c == tp->name[0] && p[1] == tp->name[1] && strcmp(p, tp->name) == 0) { yylval.Number = tp->value; return tp->type; } } /* Unknown word -- assume GMT timezone. */ yylval.Number = 0; return tZONE; } static int date_lex(void) { char c; char *p; char buff[20]; int sign; int i; int nesting; for ( ; ; ) { /* Get first character after the whitespace. */ for ( ; ; ) { while (CTYPE(isspace, (int)*yyInput)) yyInput++; c = *yyInput; /* Ignore RFC 822 comments, typically time zone names. */ if (c != LPAREN) break; for (nesting = 1; (c = *++yyInput) != RPAREN || --nesting; ) if (c == LPAREN) nesting++; else if (!IS7BIT(c) || c == '\0' || c == '\r' || (c == '\\' && ((c = *++yyInput) == '\0' || !IS7BIT(c)))) /* Lexical error: bad comment. */ return '?'; yyInput++; } /* A number? */ if (CTYPE(isdigit, (int)c) || c == '-' || c == '+') { if (c == '-' || c == '+') { sign = c == '-' ? -1 : 1; yyInput++; if (!CTYPE(isdigit, (int)*yyInput)) /* Skip the plus or minus sign. */ continue; } else sign = 0; for (i = 0; (c = *yyInput++) != '\0' && CTYPE(isdigit, (int)c); ) i = 10 * i + c - '0'; yyInput--; yylval.Number = sign < 0 ? -i : i; return sign ? tSNUMBER : tUNUMBER; } /* A word? */ if (CTYPE(isalpha, (int)c)) { for (p = buff; (c = *yyInput++) == '.' || CTYPE(isalpha, (int)c); ) if (p < &buff[sizeof buff - 1]) *p++ = CTYPE(isupper, (int)c) ? tolower(c) : c; *p = '\0'; yyInput--; return LookupWord(buff, p - buff); } return *yyInput++; } } time_t parsedate(char *p, TIMEINFO *now) { struct tm *tm; TIMEINFO ti; time_t Start; yyInput = p; if (now == NULL) { now = &ti; (void)GetTimeInfo(&ti); } tm = localtime(&now->time); yyYear = tm->tm_year + 1900; yyMonth = tm->tm_mon + 1; yyDay = tm->tm_mday; yyTimezone = now->timezone; yyDSTmode = DSTmaybe; yyHour = 0; yyMinutes = 0; yySeconds = 0; yyMeridian = MER24; yyRelSeconds = 0; yyRelMonth = 0; yyHaveDate = 0; yyHaveRel = 0; yyHaveTime = 0; if (date_parse() || yyHaveTime > 1 || yyHaveDate > 1) return -1; if (yyHaveDate || yyHaveTime) { Start = Convert(yyMonth, yyDay, yyYear, yyHour, yyMinutes, yySeconds, yyMeridian, yyDSTmode); if (Start < 0) return -1; } else { Start = now->time; if (!yyHaveRel) Start -= (tm->tm_hour * 60L + tm->tm_min) * 60L + tm->tm_sec; } Start += yyRelSeconds; if (yyRelMonth) Start += RelativeMonth(Start, yyRelMonth); /* Have to do *something* with a legitimate -1 so it's distinguishable * from the error return value. (Alternately could set errno on error.) */ return Start == -1 ? 0 : Start; } #if defined(TEST) #if YYDEBUG extern int yydebug; #endif /* YYDEBUG */ /* ARGSUSED */ int main(ac, av) int ac; char *av[]; { char buff[128]; time_t d; #if YYDEBUG yydebug = 1; #endif /* YYDEBUG */ (void)printf("Enter date, or blank line to exit.\n\t> "); for ( ; ; ) { (void)printf("\t> "); (void)fflush(stdout); if (gets(buff) == NULL || buff[0] == '\n') break; #if YYDEBUG if (strcmp(buff, "yydebug") == 0) { yydebug = !yydebug; printf("yydebug = %s\n", yydebug ? "on" : "off"); continue; } #endif /* YYDEBUG */ d = parsedate(buff, (TIMEINFO *)NULL); if (d == -1) (void)printf("Bad format - couldn't convert.\n"); else (void)printf("%s", ctime(&d)); } exit(0); /* NOTREACHED */ } #endif /* defined(TEST) */