Re: time_t timezone

I have done the same cleanup for _tzname for clarity and because some
files were using tzname as local variable names (pgtz.c).

---------------------------------------------------------------------------

Bruce Momjian wrote:
>
> OK, I have applied the following patch to fix the Cygwin _timezone
> issue.  I moved the TIMEZONE_GLOBAL up into port.h and change pgtz.c to
> use that instead.  I also changed the configure test for INT_TIMEZONE to
> test for _timezone on Cygwin.  This should fix all those problems.
>
> You found a few problems in dirmod.c but have run out of time and will
> deal with them in a few days.
>
> ---------------------------------------------------------------------------
>
> Reini Urban wrote:
> > Bruce Momjian schrieb:
> >
> > > Reini Urban wrote:
> > >
> > >>>    # PGAC_VAR_INT_TIMEZONE
> > >>>    # ---------------------
> > >>>    # Check if the global variable `timezone' exists. If so, define
> > >>>    # HAVE_INT_TIMEZONE.
> > >>>    AC_DEFUN([PGAC_VAR_INT_TIMEZONE],
> > >>>    [AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
> > >>>    [AC_TRY_LINK([#include <time.h>
> > >>>    int res;],
> > >>>      [res = timezone / 60;],
> > >>>      [pgac_cv_var_int_timezone=yes],
> > >>>      [pgac_cv_var_int_timezone=no])])
> > >>>    if test x"$pgac_cv_var_int_timezone" = xyes ; then
> > >>>      AC_DEFINE(HAVE_INT_TIMEZONE,, [Define to 1 if you have the global
> > >>>    variable 'int timezone'.])
> > >>>    fi])# PGAC_VAR_INT_TIMEZONE
> > >>>
> > >>>You can look in include/pg_config.h to see how it is defined.
> > >>
> > >>This test fails, because you cannot do arithmetic with time_t.
> > >>cygwin has/had a special workaround in pg_config_manual.h
> > >>See Tom above.
> >
> > sorry, my mistake. you can do arithmetic with time_t.
> >
> > >>All other platforms with time_t timezone should manually enable their
> > >>HAVE_INT_TIMEZONE and manually add the (int) timezone in
> > >>src/timezone/pgtz.c.
> > >
> > > OK, let's get some facts.  How is your timezone variable defined in your
> > > headers?  Is it _timezone?  How is time_t defined?  If you take the
> > > program above and compile it alone, how does it fail?
> >
> > yes, it's only _timezone.
> >
> > already sent to this list. here it is:
> >
> > /usr/include/time.h from newlib.
> > ...
> > /* defines for the opengroup specifications Derived from Issue 1 of the
> > SVID.  */
> > extern __IMPORT time_t _timezone;
> > extern __IMPORT int _daylight;
> > extern __IMPORT char *_tzname[2];
> >
> > which resolves to (gcc -E):
> > # 98 "/usr/include/time.h" 3 4
> > extern __attribute__((dllimport)) time_t _timezone;
> > extern __attribute__((dllimport)) int _daylight;
> > extern __attribute__((dllimport)) char *_tzname[2];
> >
> > time_t is a typedef from sys/types.h:
> > #ifndef __time_t_defined
> > typedef _TIME_T_ time_t;
> > #define __time_t_defined
> >
> > _TIME_T_ is a macro from machine/types.h:
> > define _TIME_T_        long
> >
> > > Also, look at your config.log output to see why it fails or email it to
> > > my privately.
> > ...
> > configure:12843: checking for int timezone
> > configure:12865: gcc -o conftest.exe -O2 -fno-strict-aliasing -Wall
> > -Wmissing-prototypes -Wmissing-declarations -fno-strict-aliasing
> > -L/usr/local/lib conftest.c -lssl -lcrypto -lz -lreadline -lcrypt
> > -lresolv -lm  >&5
> > conftest.c: In function `main':
> > conftest.c:67: error: invalid operands to binary /
> > configure:12871: $? = 1
> > configure: failed program was:
> > ...
> >
> > #include <time.h>
> > int res;
> > int
> > main ()
> > {
> > res = timezone / 60;
> >    ;
> >    return 0;
> > }
> >
> > so my patch and my whole point is wrong.
> > just the underscore is needed for cygwin in pg_config_manual.h
> > --
> > Reini Urban
> > http://xarch.tu-graz.ac.at/home/rurban/
> >
> > ---------------------------(end of broadcast)---------------------------
> > TIP 7: don't forget to increase your free space map settings
> >
>
> --
>   Bruce Momjian                        |  http://candle.pha.pa.us
>   pgman@candle.pha.pa.us               |  (610) 359-1001
>   +  If your life is a hard drive,     |  13 Roberts Road
>   +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

> Index: configure
> ===================================================================
> RCS file: /cvsroot/pgsql-server/configure,v
> retrieving revision 1.389
> diff -c -c -r1.389 configure
> *** configure    2 Sep 2004 20:39:57 -0000    1.389
> --- configure    8 Sep 2004 19:36:18 -0000
> ***************
> *** 10725,10731 ****
> --- 10725,10735 ----
>   int
>   main ()
>   {
> + #ifndef __CYGWIN__
>   res = timezone / 60;
> + #else
> + res = _timezone / 60;
> + #endif
>     ;
>     return 0;
>   }
> Index: config/c-library.m4
> ===================================================================
> RCS file: /cvsroot/pgsql-server/config/c-library.m4,v
> retrieving revision 1.26
> diff -c -c -r1.26 c-library.m4
> *** config/c-library.m4    7 Jun 2004 22:39:44 -0000    1.26
> --- config/c-library.m4    8 Sep 2004 19:36:19 -0000
> ***************
> *** 10,16 ****
>   [AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
>   [AC_TRY_LINK([#include <time.h>
>   int res;],
> !   [res = timezone / 60;],
>     [pgac_cv_var_int_timezone=yes],
>     [pgac_cv_var_int_timezone=no])])
>   if test x"$pgac_cv_var_int_timezone" = xyes ; then
> --- 10,20 ----
>   [AC_CACHE_CHECK(for int timezone, pgac_cv_var_int_timezone,
>   [AC_TRY_LINK([#include <time.h>
>   int res;],
> !   [#ifndef __CYGWIN__
> ! res = timezone / 60;
> ! #else
> ! res = _timezone / 60;
> ! #endif],
>     [pgac_cv_var_int_timezone=yes],
>     [pgac_cv_var_int_timezone=no])])
>   if test x"$pgac_cv_var_int_timezone" = xyes ; then
> Index: src/include/port.h
> ===================================================================
> RCS file: /cvsroot/pgsql-server/src/include/port.h,v
> retrieving revision 1.57
> diff -c -c -r1.57 port.h
> *** src/include/port.h    29 Aug 2004 21:08:48 -0000    1.57
> --- src/include/port.h    8 Sep 2004 19:36:26 -0000
> ***************
> *** 180,185 ****
> --- 180,193 ----
>   #define pclose(a) _pclose(a)
>   #endif
>
> + /* Global variable holding time zone information. */
> + #if !defined(__CYGWIN__)
> + #define TIMEZONE_GLOBAL timezone
> + #else
> + #define TIMEZONE_GLOBAL _timezone
> + #define tzname _tzname            /* should be in time.h? */
> + #endif
> +
>   extern int    copydir(char *fromdir, char *todir);
>
>   /* Missing rand functions */
> Index: src/interfaces/ecpg/pgtypeslib/dt.h
> ===================================================================
> RCS file: /cvsroot/pgsql-server/src/interfaces/ecpg/pgtypeslib/dt.h,v
> retrieving revision 1.19
> diff -c -c -r1.19 dt.h
> *** src/interfaces/ecpg/pgtypeslib/dt.h    1 Sep 2004 18:59:35 -0000    1.19
> --- src/interfaces/ecpg/pgtypeslib/dt.h    8 Sep 2004 19:36:28 -0000
> ***************
> *** 216,229 ****
>   } while(0)
>   #endif
>
> - /* Global variable holding time zone information. */
> - #if !defined(__CYGWIN__) && !defined(WIN32)
> - #define TIMEZONE_GLOBAL timezone
> - #else
> - #define TIMEZONE_GLOBAL _timezone
> - #define tzname _tzname            /* should be in time.h? */
> - #endif
> -
>   /*
>    * Date/time validation
>    * Include check for leap year.
> --- 216,221 ----
> Index: src/timezone/pgtz.c
> ===================================================================
> RCS file: /cvsroot/pgsql-server/src/timezone/pgtz.c,v
> retrieving revision 1.27
> diff -c -c -r1.27 pgtz.c
> *** src/timezone/pgtz.c    2 Sep 2004 01:15:06 -0000    1.27
> --- src/timezone/pgtz.c    8 Sep 2004 19:36:33 -0000
> ***************
> *** 96,106 ****
>   #if defined(HAVE_STRUCT_TM_TM_ZONE)
>       return tm->tm_gmtoff;
>   #elif defined(HAVE_INT_TIMEZONE)
> ! #ifdef HAVE_UNDERSCORE_TIMEZONE
> !     return -_timezone;
> ! #else
> !     return -timezone;
> ! #endif
>   #else
>   #error No way to determine TZ? Can this happen?
>   #endif
> --- 96,102 ----
>   #if defined(HAVE_STRUCT_TM_TM_ZONE)
>       return tm->tm_gmtoff;
>   #elif defined(HAVE_INT_TIMEZONE)
> !     return -TIMEZONE_GLOBAL;
>   #else
>   #error No way to determine TZ? Can this happen?
>   #endif

>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073
Index: src/include/port.h
===================================================================
RCS file: /cvsroot/pgsql-server/src/include/port.h,v
retrieving revision 1.58
diff -c -c -r1.58 port.h
*** src/include/port.h    8 Sep 2004 19:43:07 -0000    1.58
--- src/include/port.h    9 Sep 2004 00:08:19 -0000
***************
*** 183,191 ****
  /* Global variable holding time zone information. */
  #if !defined(__CYGWIN__)
  #define TIMEZONE_GLOBAL timezone
  #else
  #define TIMEZONE_GLOBAL _timezone
! #define tzname _tzname            /* should be in time.h? */
  #endif

  extern int    copydir(char *fromdir, char *todir);
--- 183,192 ----
  /* Global variable holding time zone information. */
  #if !defined(__CYGWIN__)
  #define TIMEZONE_GLOBAL timezone
+ #define TZNAME_GLOBAL tzname
  #else
  #define TIMEZONE_GLOBAL _timezone
! #define TZNAME_GLOBAL _tzname
  #endif

  extern int    copydir(char *fromdir, char *todir);
Index: src/interfaces/ecpg/pgtypeslib/dt_common.c
===================================================================
RCS file: /cvsroot/pgsql-server/src/interfaces/ecpg/pgtypeslib/dt_common.c,v
retrieving revision 1.18
diff -c -c -r1.18 dt_common.c
*** src/interfaces/ecpg/pgtypeslib/dt_common.c    30 Aug 2004 02:54:41 -0000    1.18
--- src/interfaces/ecpg/pgtypeslib/dt_common.c    9 Sep 2004 00:08:25 -0000
***************
*** 1065,1072 ****
               * case it contains an error message, which doesn't fit in the
               * buffer
               */
!             StrNCpy(*tzn, tzname[tm->tm_isdst], MAXTZLEN + 1);
!             if (strlen(tzname[tm->tm_isdst]) > MAXTZLEN)
                  tm->tm_isdst = -1;
          }
      }
--- 1065,1072 ----
               * case it contains an error message, which doesn't fit in the
               * buffer
               */
!             StrNCpy(*tzn, TZNAME_GLOBAL[tm->tm_isdst], MAXTZLEN + 1);
!             if (strlen(TZNAME_GLOBAL[tm->tm_isdst]) > MAXTZLEN)
                  tm->tm_isdst = -1;
          }
      }
Index: src/interfaces/ecpg/pgtypeslib/timestamp.c
===================================================================
RCS file: /cvsroot/pgsql-server/src/interfaces/ecpg/pgtypeslib/timestamp.c,v
retrieving revision 1.21
diff -c -c -r1.21 timestamp.c
*** src/interfaces/ecpg/pgtypeslib/timestamp.c    30 Aug 2004 02:54:41 -0000    1.21
--- src/interfaces/ecpg/pgtypeslib/timestamp.c    9 Sep 2004 00:08:27 -0000
***************
*** 223,229 ****
  #elif defined(HAVE_INT_TIMEZONE)
              *tzp = ((tm->tm_isdst > 0) ? (TIMEZONE_GLOBAL - 3600) : TIMEZONE_GLOBAL);
              if (tzn != NULL)
!                 *tzn = tzname[(tm->tm_isdst > 0)];
  #endif

  #else                            /* not (HAVE_TM_ZONE || HAVE_INT_TIMEZONE) */
--- 223,229 ----
  #elif defined(HAVE_INT_TIMEZONE)
              *tzp = ((tm->tm_isdst > 0) ? (TIMEZONE_GLOBAL - 3600) : TIMEZONE_GLOBAL);
              if (tzn != NULL)
!                 *tzn = TZNAME_GLOBAL[(tm->tm_isdst > 0)];
  #endif

  #else                            /* not (HAVE_TM_ZONE || HAVE_INT_TIMEZONE) */