[svn-r21396] Purpose:

    HDFFV-7693 - h5diff produces different behavior between versions: 1.8.3 and 1.8.6

Description:
    There were two issues on this. 
    One was not displaying all the comparable objects if non-comparable 
    object/attribute exist and compared before comparables ones. This issue
    occurred after 1.8.4 release. This is the issue from user.
    The other issue was not displaying all the comparable attributes, 
    if non-comparable object/attribute exist and compared ahead. This issue 
    were exist even before 1.8.4 release. So it's possible some attribute 
    comparison may have not displayed correctly in the past, if non-comparable 
    data were exist in common object.
    Fixed h5diff to display all the comparable object and attribute regardless 
    of non-comparables. 

Tested:
 jam (linux32-LE), koala (linux64-LE), heiwa (linuxppc64-BE), tejeda (mac32-LE), linew (solaris-BE), Cmake (jam, Windows)

1 files changed, 19 insertions, 17 deletions

diff --git a/tools/lib/h5diff_dset.c b/tools/lib/h5diff_dset.c
index c26c766..03ec067 100644
--- a/tools/lib/h5diff_dset.c
+++ b/tools/lib/h5diff_dset.c
@@ -313,19 +313,21 @@ hsize_t diff_datasetid( hid_t did1,
     * check for different signed/unsigned types
     *-------------------------------------------------------------------------
     */
-
-    sign1=H5Tget_sign(m_tid1);
-    sign2=H5Tget_sign(m_tid2);
-    if ( sign1 != sign2 )
+    if (can_compare)
     {
-        if ((options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
+        sign1=H5Tget_sign(m_tid1);
+        sign2=H5Tget_sign(m_tid2);
+        if ( sign1 != sign2 )
         {
-            parallel_print("Not comparable: <%s> has sign %s ", obj1_name, get_sign(sign1));
-            parallel_print("and <%s> has sign %s\n", obj2_name, get_sign(sign2));
+            if ((options->m_verbose||options->m_list_not_cmp) && obj1_name && obj2_name)
+            {
+                parallel_print("Not comparable: <%s> has sign %s ", obj1_name, get_sign(sign1));
+                parallel_print("and <%s> has sign %s\n", obj2_name, get_sign(sign2));
+            }
+    
+            can_compare=0;
+            options->not_cmp=1;
         }
-
-        can_compare=0;
-        options->not_cmp=1;
     }
 
     /* Check if type is either VLEN-data or VLEN-string to reclaim any
@@ -333,16 +335,16 @@ hsize_t diff_datasetid( hid_t did1,
     if( TRUE == h5tools_detect_vlen(m_tid1) )
         vl_data = TRUE;
 
-    /*-------------------------------------------------------------------------
+    /*------------------------------------------------------------------------
     * only attempt to compare if possible
     *-------------------------------------------------------------------------
     */
     if(can_compare) /* it is possible to compare */
     {
 
-        /*-------------------------------------------------------------------------
+        /*-----------------------------------------------------------------
         * get number of elements
-        *-------------------------------------------------------------------------
+        *------------------------------------------------------------------
         */
         nelmts1 = 1;
         for(i = 0; i < rank1; i++)
@@ -354,9 +356,9 @@ hsize_t diff_datasetid( hid_t did1,
 
         HDassert(nelmts1 == nelmts2);
 
-        /*-------------------------------------------------------------------------
+        /*-----------------------------------------------------------------
         * "upgrade" the smaller memory size
-        *-------------------------------------------------------------------------
+        *------------------------------------------------------------------
         */
 
         if(m_size1 != m_size2) {
@@ -386,9 +388,9 @@ hsize_t diff_datasetid( hid_t did1,
             name2 = diff_basename(obj2_name);
 
 
-        /*-------------------------------------------------------------------------
+        /*----------------------------------------------------------------
         * read/compare
-        *-------------------------------------------------------------------------
+        *-----------------------------------------------------------------
         */
         need = (size_t)(nelmts1 * m_size1);  /* bytes needed */
         if(need < H5TOOLS_MALLOCSIZE) {