X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgetdate.y;h=1d5690423893749dc1092e8bda6f6526d0ba7afe;hb=2e296bb50d37439d208c507bc8409336822a0c28;hp=bff1a9b78235e080d55233617f86aff87f307e1e;hpb=43e78b970f396160a887c9da94531569faeda8a0;p=gnulib.git diff --git a/lib/getdate.y b/lib/getdate.y index bff1a9b78..1d5690423 100644 --- a/lib/getdate.y +++ b/lib/getdate.y @@ -1,29 +1,66 @@ %{ -/* $Revision: 2.1 $ -** +/* ** 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; ** send any email to Rich. ** -** This grammar has eight shift/reduce conflicts. +** This grammar has nine shift/reduce conflicts. ** ** This code is in the public domain and has no copyright. */ /* SUPPRESS 287 on yaccpar_sccsid *//* Unusd static variable */ /* SUPPRESS 288 on yyerrlab *//* Label unused */ +#ifdef HAVE_CONFIG_H +#if defined (emacs) || defined (CONFIG_BROKETS) +#include +#else +#include "config.h" +#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 + +/* The following block of alloca-related preprocessor directives is here + solely to allow compilation by non GNU-C compilers of the C parser + produced from this file by old versions of bison. Newer versions of + bison include a block similar to this one in bison.simple. */ + +#ifdef __GNUC__ +#define alloca __builtin_alloca +#else +#ifdef HAVE_ALLOCA_H +#include +#else +#ifdef _AIX + #pragma alloca +#else +void *alloca (); +#endif +#endif +#endif + #ifdef __GNUC__ +#undef alloca #define alloca __builtin_alloca #else -#ifdef sparc +#ifdef HAVE_ALLOCA_H #include #else #ifdef _AIX /* for Bison */ #pragma alloca #else -char *alloca (); +void *alloca (); #endif #endif #endif @@ -36,10 +73,6 @@ char *alloca (); tricks are need, but defaults to using the gettimeofday system call. Include if that will be used. */ -#if !defined (USG) && !defined (sgi) && !defined (__386BSD__) -#include -#endif - #if defined(vms) #include @@ -49,32 +82,36 @@ char *alloca (); #include -#if defined(USG) || !defined(HAVE_FTIME) +#ifdef TIME_WITH_SYS_TIME +#include +#include +#else +#ifdef HAVE_SYS_TIME_H +#include +#else +#include +#endif +#endif + +#ifdef timezone +#undef timezone /* needed for sgi */ +#endif + +#if defined(HAVE_SYS_TIMEB_H) +#include +#else /* -** If you need to do a tzset() call to set the -** timezone, and don't have ftime(). +** We use the obsolete `struct timeb' as part of our interface! +** Since the system doesn't have it, we define it here; +** our callers must do likewise. */ struct timeb { time_t time; /* Seconds since the epoch */ unsigned short millitm; /* Field not used */ - short timezone; + short timezone; /* Minutes west of GMT */ short dstflag; /* Field not used */ }; - -#else - -#include - -#endif /* defined(USG) && !defined(HAVE_FTIME) */ - -#if defined(BSD4_2) || defined(BSD4_1C) || (defined (hp9000) && !defined (hpux)) -#include -#else -#if defined(_AIX) -#include -#endif -#include -#endif /* defined(BSD4_2) */ +#endif /* defined(HAVE_SYS_TIMEB_H) */ #endif /* defined(vms) */ @@ -82,16 +119,23 @@ struct timeb { #include #endif -#if sgi -#undef timezone +/* 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 (HAVE_MEMCPY) && !defined (bcopy) +#define bcopy(from, to, len) memcpy ((to), (from), (len)) #endif +extern struct tm *gmtime(); extern struct tm *localtime(); #define yyparse getdate_yyparse #define yylex getdate_yylex #define yyerror getdate_yyerror +static int yylex (); +static int yyerror (); + #if !defined(lint) && !defined(SABER) static char RCS[] = "$Header: str2date.y,v 2.1 90/09/06 08:15:06 cronan Exp $"; @@ -366,7 +410,7 @@ o_merid : /* NULL */ { %% /* Month and day table. */ -static TABLE MonthDayTable[] = { +static TABLE const MonthDayTable[] = { { "january", tMONTH, 1 }, { "february", tMONTH, 2 }, { "march", tMONTH, 3 }, @@ -395,7 +439,7 @@ static TABLE MonthDayTable[] = { }; /* Time units table. */ -static TABLE UnitsTable[] = { +static TABLE const UnitsTable[] = { { "year", tMONTH_UNIT, 12 }, { "month", tMONTH_UNIT, 1 }, { "fortnight", tMINUTE_UNIT, 14 * 24 * 60 }, @@ -410,7 +454,7 @@ static TABLE UnitsTable[] = { }; /* Assorted relative-time words. */ -static TABLE OtherTable[] = { +static TABLE const OtherTable[] = { { "tomorrow", tMINUTE_UNIT, 1 * 24 * 60 }, { "yesterday", tMINUTE_UNIT, -1 * 24 * 60 }, { "today", tMINUTE_UNIT, 0 }, @@ -436,7 +480,7 @@ static TABLE OtherTable[] = { /* The timezone table. */ /* Some of these are commented out because a time_t can't store a float. */ -static TABLE TimezoneTable[] = { +static TABLE const TimezoneTable[] = { { "gmt", tZONE, HOUR( 0) }, /* Greenwich Mean */ { "ut", tZONE, HOUR( 0) }, /* Universal (Coordinated) */ { "utc", tZONE, HOUR( 0) }, @@ -520,7 +564,7 @@ static TABLE TimezoneTable[] = { }; /* Military timezone table. */ -static TABLE MilitaryTable[] = { +static TABLE const MilitaryTable[] = { { "a", tZONE, HOUR( 1) }, { "b", tZONE, HOUR( 2) }, { "c", tZONE, HOUR( 3) }, @@ -553,7 +597,7 @@ static TABLE MilitaryTable[] = { /* ARGSUSED */ -int +static int yyerror(s) char *s; { @@ -599,7 +643,7 @@ Convert(Month, Day, Year, Hours, Minutes, Seconds, Meridian, DSTmode) MERIDIAN Meridian; DSTMODE DSTmode; { - static int DaysInMonth[12] = { + static int DaysInMonth[12] = { 31, 0, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; time_t tod; @@ -693,7 +737,7 @@ LookupWord(buff) { register char *p; register char *q; - register TABLE *tp; + register const TABLE *tp; int i; int abbrev; @@ -794,7 +838,7 @@ LookupWord(buff) } -int +static int yylex() { register char c; @@ -847,12 +891,38 @@ yylex() } +#define TM_YEAR_ORIGIN 1900 + +/* Yield A - B, measured in seconds. */ +static time_t +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); + return + ( + ( + ( + /* 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 */ + + (time_t)(ay-by) * 365 + )*24 + (a->tm_hour - b->tm_hour) + )*60 + (a->tm_min - b->tm_min) + )*60 + (a->tm_sec - b->tm_sec); +} + time_t get_date(p, now) char *p; struct timeb *now; { - struct tm *tm; + struct tm *tm, gmt; struct timeb ftz; time_t Start; time_t tod; @@ -860,34 +930,12 @@ get_date(p, now) yyInput = p; if (now == NULL) { now = &ftz; -#if !defined(HAVE_FTIME) (void)time(&ftz.time); - /* Set the timezone global. */ - tzset(); - { -#if sgi - ftz.timezone = (int) _timezone / 60; -#else /* not sgi */ -#ifdef __386BSD__ - ftz.timezone = 0; -#else /* neither sgi nor 386BSD */ -#if defined (USG) - extern time_t timezone; - - ftz.timezone = (int) timezone / 60; -#else /* neither sgi nor 386BSD nor USG */ - struct timeval tv; - struct timezone tz; - - gettimeofday (&tv, &tz); - ftz.timezone = (int) tz.tz_minuteswest; -#endif /* neither sgi nor 386BSD nor USG */ -#endif /* neither sgi nor 386BSD */ -#endif /* not sgi */ - } -#else /* HAVE_FTIME */ - (void)ftime(&ftz); -#endif /* HAVE_FTIME */ + + if (! (tm = gmtime (&ftz.time))) + return -1; + gmt = *tm; /* Make a copy, in case localtime modifies *tm. */ + ftz.timezone = difftm (&gmt, localtime (&ftz.time)) / 60; } tm = localtime(&now->time);