[project @ 1998-02-02 17:27:26 by simonm]

[ghc-hetmet.git] / ghc / lib / std / cbits / timezone.h

diff --git a/ghc/lib/std/cbits/timezone.h b/ghc/lib/std/cbits/timezone.h
new file mode 100644 (file)
index 0000000..46b907f
--- /dev/null
+++ b/ghc/lib/std/cbits/timezone.h
@@ -0,0 +1,47 @@
+#ifndef TIMEZONE_H
+#define TIMEZONE_H
+
+#define _OSF_SOURCE
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+
+#if HAVE_TM_ZONE
+#define ZONE(x)                 (((struct tm *)x)->tm_zone)
+#define SETZONE(x,z)     (((struct tm *)x)->tm_zone = z)
+#define GMTOFF(x)        (((struct tm *)x)->tm_gmtoff)
+#else /* ! HAVE_TM_ZONE */
+# if HAVE_TZNAME || cygwin32_TARGET_OS
+#if cygwin32_TARGET_OS
+extern char *tzname;
+#else
+extern char *tzname[2];
+#endif
+#  define ZONE(x)       (((struct tm *)x)->tm_isdst ? tzname[1] : tzname[0])
+#  define SETZONE(x,z)
+# else /* ! HAVE_TZNAME */
+/* We're in trouble. If you should end up here, please report this as a bug. */
+#  error Dont know how to get at timezone name on your OS.
+# endif /* ! HAVE_TZNAME */
+/* Get the offset in secs from UTC, if (struct tm) doesn't supply it. */
+
+extern TYPE_TIMEZONE timezone;
+
+# if HAVE_ALTZONE
+extern time_t altzone;
+#  define GMTOFF(x)     (((struct tm *)x)->tm_isdst ? altzone : timezone)
+# else /* ! HAVE_ALTZONE */
+/* Assume that DST offset is 1 hour ... */
+#  define GMTOFF(x) (((struct tm *)x)->tm_isdst ? (timezone - 3600) : timezone)
+# endif /* ! HAVE_ALTZONE */
+#endif  /* ! HAVE_TM_ZONE */
+
+#endif /* TIMEZONE_H */