From 6c3ea4f47ea280811a7fe53a22f7832e4533c9ec Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 26 Jun 2024 18:18:36 +0200 Subject: Adding upstream version 1:4.15.2. Signed-off-by: Daniel Baumann --- libmisc/getdate.y | 954 ------------------------------------------------------ 1 file changed, 954 deletions(-) delete mode 100644 libmisc/getdate.y (limited to 'libmisc/getdate.y') diff --git a/libmisc/getdate.y b/libmisc/getdate.y deleted file mode 100644 index 0c07f74..0000000 --- a/libmisc/getdate.y +++ /dev/null @@ -1,954 +0,0 @@ -%{ -/* -** 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; -** -** This grammar has 13 shift/reduce conflicts. -** -** This code is in the public domain and has no copyright. -*/ - -#ifdef HAVE_CONFIG_H -# include -# ifdef FORCE_ALLOCA_H -# include -# endif -#endif - -/* Since the code of getdate.y is not included in the Emacs executable - itself, there is no need to #define static in this file. Even if - the code were included in the Emacs executable, it probably - wouldn't do any harm to #undef it here; this will only cause - problems if we try to write to a static variable, which I don't - think this code needs to do. */ -#ifdef emacs -# undef static -#endif - -#include -#include -#include - -#include "getdate.h" - -#include - -/* Some old versions of bison generate parsers that use bcopy. - That loses on systems that don't provide the function, so we have - to redefine it here. */ -#if !defined (HAVE_BCOPY) && !defined (bcopy) -# define bcopy(from, to, len) memcpy ((to), (from), (len)) -#endif - -/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), - as well as gratuitously global symbol names, so we can have multiple - yacc generated parsers in the same program. Note that these are only - the variables produced by yacc. If other parser generators (bison, - byacc, etc) produce additional global names that conflict at link time, - then those parser generators need to be fixed instead of adding those - names to this list. */ - -#define yymaxdepth gd_maxdepth -#define yyparse gd_parse -#define yylex gd_lex -#define yyerror gd_error -#define yylval gd_lval -#define yychar gd_char -#define yydebug gd_debug -#define yypact gd_pact -#define yyr1 gd_r1 -#define yyr2 gd_r2 -#define yydef gd_def -#define yychk gd_chk -#define yypgo gd_pgo -#define yyact gd_act -#define yyexca gd_exca -#define yyerrflag gd_errflag -#define yynerrs gd_nerrs -#define yyps gd_ps -#define yypv gd_pv -#define yys gd_s -#define yy_yys gd_yys -#define yystate gd_state -#define yytmp gd_tmp -#define yyv gd_v -#define yy_yyv gd_yyv -#define yyval gd_val -#define yylloc gd_lloc -#define yyreds gd_reds /* With YYDEBUG defined */ -#define yytoks gd_toks /* With YYDEBUG defined */ -#define yylhs gd_yylhs -#define yylen gd_yylen -#define yydefred gd_yydefred -#define yydgoto gd_yydgoto -#define yysindex gd_yysindex -#define yyrindex gd_yyrindex -#define yygindex gd_yygindex -#define yytable gd_yytable -#define yycheck gd_yycheck - -static int yylex (void); -static int yyerror (const char *s); - -#define EPOCH 1970 -#define HOUR(x) ((x) * 60) - -#define MAX_BUFF_LEN 128 /* size of buffer to read the date into */ - -/* -** An entry in the lexical lookup table. -*/ -typedef struct _TABLE { - const char *name; - int type; - int value; -} TABLE; - - -/* -** 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 const char *yyInput; -static int yyDayOrdinal; -static int yyDayNumber; -static int yyHaveDate; -static int yyHaveDay; -static int yyHaveRel; -static int yyHaveTime; -static int yyHaveZone; -static int yyTimezone; -static int yyDay; -static int yyHour; -static int yyMinutes; -static int yyMonth; -static int yySeconds; -static int yyYear; -static MERIDIAN yyMeridian; -static int yyRelDay; -static int yyRelHour; -static int yyRelMinutes; -static int yyRelMonth; -static int yyRelSeconds; -static int yyRelYear; - -%} - -%union { - int Number; - enum _MERIDIAN Meridian; -} - -%token tAGO tDAY tDAY_UNIT tDAYZONE tDST tHOUR_UNIT tID -%token tMERIDIAN tMINUTE_UNIT tMONTH tMONTH_UNIT -%token tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE - -%type tDAY tDAY_UNIT tDAYZONE tHOUR_UNIT tMINUTE_UNIT -%type tMONTH tMONTH_UNIT -%type tSEC_UNIT tSNUMBER tUNUMBER tYEAR_UNIT tZONE -%type 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; - yyHaveZone++; - yyTimezone = ($4 < 0 - ? -$4 % 100 + (-$4 / 100) * 60 - : - ($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; - yyHaveZone++; - yyTimezone = ($6 < 0 - ? -$6 % 100 + (-$6 / 100) * 60 - : - ($6 % 100 + ($6 / 100) * 60)); - } - ; - -zone : tZONE { - yyTimezone = $1; - } - | tDAYZONE { - yyTimezone = $1 - 60; - } - | - tZONE tDST { - yyTimezone = $1 - 60; - } - ; - -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 { - /* Interpret as YYYY/MM/DD if $1 >= 1000, otherwise as MM/DD/YY. - The goal in recognizing YYYY/MM/DD is solely to support legacy - machine-generated dates like those in an RCS log listing. If - you want portability, use the ISO 8601 format. */ - if ($1 >= 1000) - { - 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; - yyRelMinutes = -yyRelMinutes; - yyRelHour = -yyRelHour; - yyRelDay = -yyRelDay; - yyRelMonth = -yyRelMonth; - yyRelYear = -yyRelYear; - } - | relunit - ; - -relunit : tUNUMBER tYEAR_UNIT { - yyRelYear += $1 * $2; - } - | tSNUMBER tYEAR_UNIT { - yyRelYear += $1 * $2; - } - | tYEAR_UNIT { - yyRelYear++; - } - | tUNUMBER tMONTH_UNIT { - yyRelMonth += $1 * $2; - } - | tSNUMBER tMONTH_UNIT { - yyRelMonth += $1 * $2; - } - | tMONTH_UNIT { - yyRelMonth++; - } - | tUNUMBER tDAY_UNIT { - yyRelDay += $1 * $2; - } - | tSNUMBER tDAY_UNIT { - yyRelDay += $1 * $2; - } - | tDAY_UNIT { - yyRelDay++; - } - | tUNUMBER tHOUR_UNIT { - yyRelHour += $1 * $2; - } - | tSNUMBER tHOUR_UNIT { - yyRelHour += $1 * $2; - } - | tHOUR_UNIT { - yyRelHour++; - } - | tUNUMBER tMINUTE_UNIT { - yyRelMinutes += $1 * $2; - } - | tSNUMBER tMINUTE_UNIT { - yyRelMinutes += $1 * $2; - } - | tMINUTE_UNIT { - yyRelMinutes++; - } - | tUNUMBER tSEC_UNIT { - yyRelSeconds += $1 * $2; - } - | tSNUMBER tSEC_UNIT { - yyRelSeconds += $1 * $2; - } - | tSEC_UNIT { - yyRelSeconds++; - } - ; - -number : tUNUMBER - { - if ((yyHaveTime != 0) && (yyHaveDate != 0) && (yyHaveRel == 0)) - 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, 0, 0 } -}; - -/* Time units table. */ -static TABLE const UnitsTable[] = { - { "year", tYEAR_UNIT, 1 }, - { "month", tMONTH_UNIT, 1 }, - { "fortnight", tDAY_UNIT, 14 }, - { "week", tDAY_UNIT, 7 }, - { "day", tDAY_UNIT, 1 }, - { "hour", tHOUR_UNIT, 1 }, - { "minute", tMINUTE_UNIT, 1 }, - { "min", tMINUTE_UNIT, 1 }, - { "second", tSEC_UNIT, 1 }, - { "sec", tSEC_UNIT, 1 }, - { NULL, 0, 0 } -}; - -/* 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, 0, 0 } -}; - -/* The timezone table. */ -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 */ - { "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 */ - { "mesz", 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 */ - { "zp4", tZONE, -HOUR (4) }, /* USSR Zone 3 */ - { "zp5", tZONE, -HOUR (5) }, /* USSR Zone 4 */ - { "zp6", tZONE, -HOUR (6) }, /* USSR Zone 5 */ - { "wast", tZONE, -HOUR (7) }, /* West Australian Standard */ - { "wadt", tDAYZONE, -HOUR (7) }, /* West Australian Daylight */ - { "cct", tZONE, -HOUR (8) }, /* China Coast, USSR Zone 7 */ - { "jst", tZONE, -HOUR (9) }, /* Japan Standard, USSR Zone 8 */ - { "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, 0, 0 } -}; - -/* 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, 0, 0 } -}; - - - - -static int yyerror (unused const char *s) -{ - return 0; -} - -static int ToHour (int Hours, MERIDIAN Meridian) -{ - switch (Meridian) - { - case MER24: - if (Hours < 0 || Hours > 23) - return -1; - return Hours; - case MERam: - if (Hours < 1 || Hours > 12) - return -1; - if (Hours == 12) - Hours = 0; - return Hours; - case MERpm: - if (Hours < 1 || Hours > 12) - return -1; - if (Hours == 12) - Hours = 0; - return Hours + 12; - default: - abort (); - } - /* NOTREACHED */ -} - -static int ToYear (int Year) -{ - if (Year < 0) - Year = -Year; - - /* XPG4 suggests that years 00-68 map to 2000-2068, and - years 69-99 map to 1969-1999. */ - if (Year < 69) - Year += 2000; - else if (Year < 100) - Year += 1900; - - return Year; -} - -static int LookupWord (char *buff) -{ - register char *p; - register char *q; - register const TABLE *tp; - int i; - bool abbrev; - - /* Make it lowercase. */ - for (p = buff; '\0' != *p; p++) - if (isupper (*p)) - *p = tolower (*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 = true; - else if (strlen (buff) == 4 && buff[3] == '.') - { - abbrev = true; - buff[3] = '\0'; - } - else - abbrev = false; - - 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 (*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; '\0' != *q; q++) - if (*q != '.') - *p++ = *q; - else - i++; - *p = '\0'; - if (0 != i) - for (tp = TimezoneTable; NULL != tp->name; tp++) - if (strcmp (buff, tp->name) == 0) - { - yylval.Number = tp->value; - return tp->type; - } - - return tID; -} - -static int -yylex (void) -{ - register char c; - register char *p; - char buff[20]; - int Count; - int sign; - - for (;;) - { - while (isspace (*yyInput)) - yyInput++; - - if (isdigit (c = *yyInput) || c == '-' || c == '+') - { - if (c == '-' || c == '+') - { - sign = c == '-' ? -1 : 1; - if (!isdigit (*++yyInput)) - /* skip the '-' sign */ - continue; - } - else - sign = 0; - for (yylval.Number = 0; isdigit (c = *yyInput++);) - yylval.Number = 10 * yylval.Number + c - '0'; - yyInput--; - if (sign < 0) - yylval.Number = -yylval.Number; - return (0 != sign) ? tSNUMBER : tUNUMBER; - } - if (isalpha (c)) - { - for (p = buff; (c = *yyInput++, isalpha (c)) || 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 (struct tm *a, struct tm *b) -{ - int ay = a->tm_year + (TM_YEAR_ORIGIN - 1); - int by = b->tm_year + (TM_YEAR_ORIGIN - 1); - long 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 (const char *p, const time_t *now) -{ - struct tm tm, tm0, *tmp; - time_t Start; - - yyInput = p; - Start = now ? *now : time ((time_t *) NULL); - tmp = localtime (&Start); - yyYear = tmp->tm_year + TM_YEAR_ORIGIN; - yyMonth = tmp->tm_mon + 1; - yyDay = tmp->tm_mday; - yyHour = tmp->tm_hour; - yyMinutes = tmp->tm_min; - yySeconds = tmp->tm_sec; - yyMeridian = MER24; - yyRelSeconds = 0; - yyRelMinutes = 0; - yyRelHour = 0; - yyRelDay = 0; - yyRelMonth = 0; - yyRelYear = 0; - yyHaveDate = 0; - yyHaveDay = 0; - yyHaveRel = 0; - yyHaveTime = 0; - yyHaveZone = 0; - - if (yyparse () - || yyHaveTime > 1 || yyHaveZone > 1 || yyHaveDate > 1 || yyHaveDay > 1) - return -1; - - tm.tm_year = ToYear (yyYear) - TM_YEAR_ORIGIN + yyRelYear; - tm.tm_mon = yyMonth - 1 + yyRelMonth; - tm.tm_mday = yyDay + yyRelDay; - if ((yyHaveTime != 0) || - ( (yyHaveRel != 0) && (yyHaveDate == 0) && (yyHaveDay == 0) )) - { - tm.tm_hour = ToHour (yyHour, yyMeridian); - if (tm.tm_hour < 0) - return -1; - tm.tm_min = yyMinutes; - tm.tm_sec = yySeconds; - } - else - { - tm.tm_hour = tm.tm_min = tm.tm_sec = 0; - } - tm.tm_hour += yyRelHour; - tm.tm_min += yyRelMinutes; - tm.tm_sec += yyRelSeconds; - tm.tm_isdst = -1; - tm0 = tm; - - Start = mktime (&tm); - - if (Start == (time_t) -1) - { - - /* Guard against falsely reporting errors near the time_t boundaries - when parsing times in other time zones. For example, if the min - time_t value is 1970-01-01 00:00:00 UTC and we are 8 hours ahead - of UTC, then the min localtime value is 1970-01-01 08:00:00; if - we apply mktime to 1970-01-01 00:00:00 we will get an error, so - we apply mktime to 1970-01-02 08:00:00 instead and adjust the time - zone by 24 hours to compensate. This algorithm assumes that - there is no DST transition within a day of the time_t boundaries. */ - if (yyHaveZone) - { - tm = tm0; - if (tm.tm_year <= EPOCH - TM_YEAR_ORIGIN) - { - tm.tm_mday++; - yyTimezone -= 24 * 60; - } - else - { - tm.tm_mday--; - yyTimezone += 24 * 60; - } - Start = mktime (&tm); - } - - if (Start == (time_t) -1) - return Start; - } - - if (yyHaveDay && !yyHaveDate) - { - tm.tm_mday += ((yyDayNumber - tm.tm_wday + 7) % 7 - + 7 * (yyDayOrdinal - (0 < yyDayOrdinal))); - Start = mktime (&tm); - if (Start == (time_t) -1) - return Start; - } - - if (yyHaveZone) - { - long delta = yyTimezone * 60L + difftm (&tm, gmtime (&Start)); - if ((Start + delta < Start) != (delta < 0)) - return -1; /* time_t overflow */ - Start += delta; - } - - return Start; -} - -#if defined (TEST) - -/* ARGSUSED */ -int -main (ac, av) - int ac; - char *av[]; -{ - char buff[MAX_BUFF_LEN + 1]; - time_t d; - - (void) printf ("Enter date, or blank line to exit.\n\t> "); - (void) fflush (stdout); - - buff[MAX_BUFF_LEN] = 0; - while (fgets (buff, MAX_BUFF_LEN, stdin) && buff[0]) - { - d = get_date (buff, (time_t *) NULL); - 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) */ -- cgit v1.2.3