[svn-r9959] Purpose: Bug fix

Description: For variable-length string, H5Tget_class returned H5T_STRING as
its class.  But H5Tdetect_class and H5Tget_member_class considered it as
H5T_VLEN.  This is fixed to let all these 3 functions treat it as H5T_STRING.
Some test cases have been added to dtypes.c


Platforms tested:  heping - already tested for v1.6 with h5committest

Misc. update:  RELEASE.txt

1 files changed, 18 insertions, 4 deletions

diff --git a/src/H5T.c b/src/H5T.c
index 42c6714..69cf02b 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -1752,7 +1752,7 @@ H5Tget_class(hid_t type_id)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_NO_CLASS, "not a data type");
 
     /* Set return value */
-    ret_value= H5T_get_class(dt);
+    ret_value= H5T_get_class(dt, FALSE);
     
 done:
     FUNC_LEAVE_API(ret_value);
@@ -1778,7 +1778,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5T_class_t
-H5T_get_class(const H5T_t *dt)
+H5T_get_class(const H5T_t *dt, htri_t internal)
 {
     H5T_class_t ret_value;
 
@@ -1792,6 +1792,16 @@ H5T_get_class(const H5T_t *dt)
     else
         ret_value=dt->shared->type;
 
+    /* Externally, a VL string is a string; internally, a VL string is a VL. */ 
+    if(internal) { 
+        ret_value=dt->shared->type;
+    } else {
+        if(H5T_IS_VL_STRING(dt->shared))
+            ret_value=H5T_STRING;
+        else
+            ret_value=dt->shared->type;
+    }
+
 done:
     FUNC_LEAVE_NOAPI(ret_value);
 }   /* end H5T_get_class() */
@@ -1827,8 +1837,12 @@ H5Tdetect_class(hid_t type, H5T_class_t cls)
     if (!(cls>H5T_NO_CLASS && cls<H5T_NCLASSES))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_NO_CLASS, "not a data type class");
 
-    /* Set return value */
-    ret_value=H5T_detect_class(dt,cls);
+    /* Set return value.  Consider VL string as a string for API, as a VL for
+     * internal use. */
+    if(H5T_IS_VL_STRING(dt->shared))
+        ret_value = (H5T_STRING==cls);
+    else
+        ret_value=H5T_detect_class(dt,cls);
 
 done:
     FUNC_LEAVE_API(ret_value);