Cygwin: rename localtime.cc to localtime_wrapper.c
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
159
winsup/cygwin/tzcode/localtime_wrapper.c
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159
winsup/cygwin/tzcode/localtime_wrapper.c
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/* localtime.cc: Wrapper of NetBSD tzcode support for Cygwin. See README file.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "../winsup.h"
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#include "../sync.h"
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#include "../include/cygwin/version.h"
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#include "tz_posixrules.h"
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static NO_COPY muto tzset_guard;
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// Convert these NetBSD rwlock ops into Cygwin muto ops
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#define rwlock_wrlock(X) tzset_guard.init("tzset_guard")->acquire()
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#define rwlock_unlock(X) tzset_guard.release()
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// Set these NetBSD-related option #defines appropriately for Cygwin
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//#define STD_INSPIRED // early-include private.h below does this
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#define lint
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#define HAVE_POSIX_DECLS 0
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#define USG_COMPAT 1
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#define NO_ERROR_IN_DST_GAP
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#define state __state
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// Turn a specific known kind of const parameter into non-const
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#define __UNCONST(X) ((char *) (X))
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// Turn off these NetBSD audit-related definitions
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#define __aconst
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#define _DIAGASSERT(X)
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// Supply this Cygwin-specific function in advance of its use in localtime.c
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static char *
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tzgetwintzi (char *wildabbr, char *outbuf)
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{
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TIME_ZONE_INFORMATION tzi;
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char *cp, *dst;
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wchar_t *wsrc;
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div_t d;
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GetTimeZoneInformation (&tzi);
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dst = cp = outbuf;
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for (wsrc = tzi.StandardName; *wsrc; wsrc++)
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if (*wsrc >= L'A' && *wsrc <= L'Z')
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*dst++ = *wsrc;
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if ((dst - cp) < 3)
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{
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/* In non-english Windows, converted tz.StandardName
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may not contain a valid standard timezone name. */
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strcpy (cp, wildabbr);
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cp += strlen (wildabbr);
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}
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else
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cp = dst;
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d = div (tzi.Bias + tzi.StandardBias, 60);
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__small_sprintf (cp, "%d", d.quot);
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if (d.rem)
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__small_sprintf (cp = strchr (cp, 0), ":%d", abs (d.rem));
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if (tzi.StandardDate.wMonth)
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{
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cp = strchr (cp, 0);
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dst = cp;
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for (wsrc = tzi.DaylightName; *wsrc; wsrc++)
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if (*wsrc >= L'A' && *wsrc <= L'Z')
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*dst++ = *wsrc;
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if ((dst - cp) < 3)
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{
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/* In non-english Windows, converted tz.DaylightName
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may not contain a valid daylight timezone name. */
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strcpy (cp, wildabbr);
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cp += strlen (wildabbr);
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}
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else
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cp = dst;
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d = div (tzi.Bias + tzi.DaylightBias, 60);
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__small_sprintf (cp, "%d", d.quot);
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if (d.rem)
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__small_sprintf (cp = strchr (cp, 0), ":%d", abs (d.rem));
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cp = strchr (cp, 0);
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__small_sprintf (cp = strchr (cp, 0), ",M%d.%d.%d/%d",
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tzi.DaylightDate.wMonth,
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tzi.DaylightDate.wDay,
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tzi.DaylightDate.wDayOfWeek,
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tzi.DaylightDate.wHour);
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if (tzi.DaylightDate.wMinute || tzi.DaylightDate.wSecond)
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__small_sprintf (cp = strchr (cp, 0), ":%d",
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tzi.DaylightDate.wMinute);
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if (tzi.DaylightDate.wSecond)
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__small_sprintf (cp = strchr (cp, 0), ":%d",
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tzi.DaylightDate.wSecond);
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cp = strchr (cp, 0);
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__small_sprintf (cp = strchr (cp, 0), ",M%d.%d.%d/%d",
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tzi.StandardDate.wMonth,
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tzi.StandardDate.wDay,
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tzi.StandardDate.wDayOfWeek,
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tzi.StandardDate.wHour);
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if (tzi.StandardDate.wMinute || tzi.StandardDate.wSecond)
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__small_sprintf (cp = strchr (cp, 0), ":%d",
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tzi.StandardDate.wMinute);
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if (tzi.StandardDate.wSecond)
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__small_sprintf (cp = strchr (cp, 0), ":%d",
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tzi.StandardDate.wSecond);
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}
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/* __small_printf ("TZ deduced as `%s'\n", outbuf); */
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return outbuf;
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}
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// Get ready to wrap NetBSD's localtime.c
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Pull these in early to catch any small issues before the real test
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#include "private.h"
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#include "tzfile.h"
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/* Some NetBSD differences were too difficult to work around..
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so #include a patched copy of localtime.c rather than the NetBSD original.
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Here is a list of the patches...
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(1) fix an erroneous decl of tzdirslash size (flagged by g++)
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(2) add conditional call to Cygwin's tzgetwintzi() from tzsetlcl()
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(3) add Cygwin's historical "posixrules" support to tzloadbody()
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*/
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#include "localtime.c.patched"
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#ifdef __cplusplus
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}
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#endif
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// Don't forget these Cygwin-specific additions from this point to EOF
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EXPORT_ALIAS (tzset_unlocked, _tzset_unlocked)
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extern "C" long
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__cygwin_gettzoffset (const struct tm *tmp)
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{
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#ifdef TM_GMTOFF
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if (CYGWIN_VERSION_CHECK_FOR_EXTRA_TM_MEMBERS)
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return tmp->TM_GMTOFF;
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#endif /* defined TM_GMTOFF */
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__tzinfo_type *tz = __gettzinfo ();
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/* The sign of this is exactly opposite the envvar TZ. We
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could directly use the global _timezone for tm_isdst==0,
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but have to use __tzrule for daylight savings. */
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long offset = -tz->__tzrule[tmp->tm_isdst > 0].offset;
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return offset;
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}
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extern "C" const char *
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__cygwin_gettzname (const struct tm *tmp)
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{
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#ifdef TM_ZONE
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if (CYGWIN_VERSION_CHECK_FOR_EXTRA_TM_MEMBERS)
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return tmp->TM_ZONE;
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#endif
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return _tzname[tmp->tm_isdst > 0];
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}
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