[svn-r28236] Rework get timezone function to add another exclusion define (H5_HAVA_TM_GMTOFF).

Also needed to add prototype - followed lead of HDrand.
Tested linux and windows

3 files changed, 17 insertions, 5 deletions

diff --git a/src/H5Omtime.c b/src/H5Omtime.c
index d8c5305..272e54a 100644
--- a/src/H5Omtime.c
+++ b/src/H5Omtime.c
@@ -226,7 +226,7 @@ H5O_mtime_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
     /* BSD-like systems */
     the_time += tm.tm_gmtoff;
 #elif defined(H5_HAVE_TIMEZONE)
-    the_time -= HDget_timezone() - (tm.tm_isdst ? 3600 : 0);
+    the_time -= HDgettimezone() - (tm.tm_isdst ? 3600 : 0);
 #else
     /*
      * The catch-all.  If we can't convert a character string universal
diff --git a/src/H5private.h b/src/H5private.h
index 26111ff..6016295 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -495,7 +495,7 @@
 #endif
 
 /* Double constant wrapper
- * 
+ *
  * Quiets gcc warnings from -Wunsuffixed-float-constants.
  *
  * This is a really annoying warning since the standard specifies that
@@ -935,6 +935,14 @@ H5_DLL int HDfprintf (FILE *stream, const char *fmt, ...);
 #ifndef HDgets
     #define HDgets(S)    gets(S)
 #endif /* HDgets */
+#ifndef H5_HAVE_TM_GMTOFF
+#ifdef H5_HAVE_TIMEZONE
+    #ifndef HDgettimezone
+        #define HDgettimezone()   HDget_timezone()
+    #endif /* HDgettimezone */
+    H5_DLL int HDget_timezone(void);
+#endif /* H5_HAVE_TIMEZONE */
+#endif /* H5_HAVE_TM_GMTOFF */
 #ifndef HDgettimeofday
     #define HDgettimeofday(S,P)  gettimeofday(S,P)
 #endif /* HDgettimeofday */
@@ -2065,7 +2073,7 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     FUNC_ENTER_COMMON_NOERR(!H5_IS_API(FUNC));                                \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
-/* Use the following two macros as replacements for the FUNC_ENTER_NOAPI 
+/* Use the following two macros as replacements for the FUNC_ENTER_NOAPI
  * and FUNC_ENTER_NOAPI_NOINIT macros when the function needs to set
  * up a metadata tag. */
 #define FUNC_ENTER_NOAPI_TAG(dxpl_id, tag, err) {                             \
diff --git a/src/H5system.c b/src/H5system.c
index fc01366..0de920c 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -599,24 +599,28 @@ void HDsrand(unsigned int seed)
  *
  *-------------------------------------------------------------------------
  */
+#ifndef H5_HAVE_TM_GMTOFF
 #ifdef H5_HAVE_TIMEZONE
 
-long HDget_timezone(void)
+long int HDget_timezone(void)
 {
+#ifdef H5_HAVE_VISUAL_STUDIO
 #if _MSC_VER >= 1900  /* VS 2015 */
 
     /* In gcc and in Visual Studio prior to VS 2015 'timezone' is a global
      * variable declared in time.h. That variable was deprecated and in
      * VS 2015 is removed, with _get_timezone replacing it.
      */
-    long timezone = 0;
+    long int timezone = 0;
 
     #define HDget_timezone(V)    _get_timezone(V);
     HDget_timezone(&timezone);
 #endif
+#endif
     return timezone;
 }
 #endif /* H5_HAVE_TIMEZONE */
+#endif /* H5_HAVE_TM_GMTOFF */
 
 /*-------------------------------------------------------------------------
  * Function:  Wgettimeofday