X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fgetdate.y;h=3159c6d9a0d73547dc5d557f2001092b746aedb9;hb=refs%2Ftags%2Fss-940725-22h45;hp=f856a180782250504e54364127079c6ce3fd3406;hpb=29e59276fc2d28fcbede9bad652e0e648d33fc5f;p=gnulib.git diff --git a/lib/getdate.y b/lib/getdate.y index f856a1807..3159c6d9a 100644 --- a/lib/getdate.y +++ b/lib/getdate.y @@ -1,31 +1,34 @@ %{ -/* $Revision: 1.1.1.1 $ -** +/* ** 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 10 shift/reduce conflicts. ** ** This code is in the public domain and has no copyright. */ -/* SUPPRESS 287 on yaccpar_sccsid *//* Unusd static variable */ +/* SUPPRESS 287 on yaccpar_sccsid *//* Unused static variable */ /* SUPPRESS 288 on yyerrlab *//* Label unused */ -#ifdef __GNUC__ -#define alloca __builtin_alloca -#else -#ifdef sparc -#include +#ifdef HAVE_CONFIG_H +#if defined (emacs) || defined (CONFIG_BROKETS) +#include #else -#ifdef _AIX /* for Bison */ - #pragma alloca -#else -char *alloca (); +#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 #include @@ -36,10 +39,6 @@ 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 +48,36 @@ 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) */ @@ -82,21 +85,22 @@ 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 -#if !defined(lint) && !defined(SABER) -static char RCS[] = - "$Header: /w/src/cvsroot/shellutils/lib/getdate.y,v 1.1.1.1 1992/11/01 05:44:32 meyering Exp $"; -#endif /* !defined(lint) && !defined(SABER) */ - +static int yylex (); +static int yyerror (); #define EPOCH 1970 #define HOUR(x) ((time_t)(x) * 60) @@ -271,6 +275,12 @@ date : tUNUMBER '/' tUNUMBER { yyMonth = -$2; yyDay = -$3; } + | tUNUMBER tMONTH tSNUMBER { + /* e.g. 17-JUN-1992. */ + yyDay = $1; + yyMonth = $2; + yyYear = -$3; + } | tMONTH tUNUMBER { yyMonth = $1; yyDay = $2; @@ -332,25 +342,24 @@ number : tUNUMBER { yyYear = $1; else { if($1>10000) { - time_t date_part; - - date_part= $1/10000; yyHaveDate++; - yyDay= (date_part)%100; - yyMonth= (date_part/100)%100; - yyYear = date_part/10000; - } - yyHaveTime++; - if ($1 < 100) { - yyHour = $1; - yyMinutes = 0; + yyDay= ($1)%100; + yyMonth= ($1/100)%100; + yyYear = $1/10000; } else { - yyHour = $1 / 100; - yyMinutes = $1 % 100; - } - yySeconds = 0; - yyMeridian = MER24; + yyHaveTime++; + if ($1 < 100) { + yyHour = $1; + yyMinutes = 0; + } + else { + yyHour = $1 / 100; + yyMinutes = $1 % 100; + } + yySeconds = 0; + yyMeridian = MER24; + } } } ; @@ -583,6 +592,8 @@ ToSeconds(Hours, Minutes, Seconds, Meridian) if (Hours < 1 || Hours > 12) return -1; return ((Hours + 12) * 60L + Minutes) * 60L + Seconds; + default: + abort (); } /* NOTREACHED */ } @@ -846,13 +857,36 @@ yylex() } } +#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, now) char *p; struct timeb *now; { - struct tm *tm; + struct tm *tm, gmt; struct timeb ftz; time_t Start; time_t tod; @@ -860,34 +894,18 @@ 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. */ + + if (! (tm = localtime (&ftz.time))) + return -1; + + ftz.timezone = difftm (&gmt, tm) / 60; + if(tm->tm_isdst) + ftz.timezone += 60; } tm = localtime(&now->time); @@ -941,6 +959,7 @@ get_date(p, now) #if defined(TEST) /* ARGSUSED */ +int main(ac, av) int ac; char *av[];