[svn-r20676] Purpose:

    - HDFFV-5928 - GMQS: h5diff problem and improvement on comparsing the same objects

Description:
    Fixed:
    1) adding h5tools_is_obj_same() function to check if two given IDs or paths point to the same object. This function can be very useful for other tools and applications.
    2) using h5tools_is_obj_same() at h5diff() and diff() in h5diff.c. If two paths point to the same object, there is no need to check the details of the object since we know there is no difference. The fix will increase the performance by skipping the content comparison. It also fixed the problem of reporting difference for some cases of comparing the same file, e.g. empty files or files with incomparable objects the same file.

    Test update:
    Updat prvious test cases (171, 172, 530) affected by this fix, so they
    still perfrom originally intended testing without bypassing.

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

7 files changed, 16 insertions, 20 deletions

diff --git a/tools/h5diff/testfiles/h5diff_17.txt b/tools/h5diff/testfiles/h5diff_17.txt
index 5cb604d..5e48dae 100644
--- a/tools/h5diff/testfiles/h5diff_17.txt
+++ b/tools/h5diff/testfiles/h5diff_17.txt
@@ -23,8 +23,10 @@ file1     file2
     x           /g1/fp17       
     x           /g1/fp18       
     x           /g1/fp19       
+    x           /g1/fp19_COPY  
     x           /g1/fp2        
     x           /g1/fp20       
+    x           /g1/fp20_COPY  
     x           /g1/ld         
            x    /g2            
            x    /g2/dset1      
diff --git a/tools/h5diff/testfiles/h5diff_171.txt b/tools/h5diff/testfiles/h5diff_171.txt
index 5314a79..aabe16a 100644
--- a/tools/h5diff/testfiles/h5diff_171.txt
+++ b/tools/h5diff/testfiles/h5diff_171.txt
@@ -1,3 +1,3 @@
-dataset: </g1/fp19> and </g1/fp19>
+dataset: </g1/fp19> and </g1/fp19_COPY>
 0 differences found
 EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_172.txt b/tools/h5diff/testfiles/h5diff_172.txt
index 0269194..852f7b5 100644
--- a/tools/h5diff/testfiles/h5diff_172.txt
+++ b/tools/h5diff/testfiles/h5diff_172.txt
@@ -1,3 +1,3 @@
-dataset: </g1/fp20> and </g1/fp20>
+dataset: </g1/fp20> and </g1/fp20_COPY>
 0 differences found
 EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_530.txt b/tools/h5diff/testfiles/h5diff_530.txt
index bd2b435..73d736e 100644
--- a/tools/h5diff/testfiles/h5diff_530.txt
+++ b/tools/h5diff/testfiles/h5diff_530.txt
@@ -1,7 +1,7 @@
 
-file1     file2
+group1   group2
 ---------------------------------------
-    x      x    /              
+    x      x                   
     x      x    /Compound_dset1
     x      x    /Compound_dset2
     x      x    /Compound_dset3
@@ -12,24 +12,24 @@ file1     file2
     x      x    /Compound_dset8
     x      x    /Compound_dset9
 
-group  : </> and </>
+group  : </group> and </group_copy>
 0 differences found
-dataset: </Compound_dset1> and </Compound_dset1>
+dataset: </group/Compound_dset1> and </group_copy/Compound_dset1>
 0 differences found
-dataset: </Compound_dset2> and </Compound_dset2>
+dataset: </group/Compound_dset2> and </group_copy/Compound_dset2>
 0 differences found
-dataset: </Compound_dset3> and </Compound_dset3>
+dataset: </group/Compound_dset3> and </group_copy/Compound_dset3>
 0 differences found
-dataset: </Compound_dset4> and </Compound_dset4>
+dataset: </group/Compound_dset4> and </group_copy/Compound_dset4>
 0 differences found
-dataset: </Compound_dset5> and </Compound_dset5>
+dataset: </group/Compound_dset5> and </group_copy/Compound_dset5>
 0 differences found
-dataset: </Compound_dset6> and </Compound_dset6>
+dataset: </group/Compound_dset6> and </group_copy/Compound_dset6>
 0 differences found
-dataset: </Compound_dset7> and </Compound_dset7>
+dataset: </group/Compound_dset7> and </group_copy/Compound_dset7>
 0 differences found
-dataset: </Compound_dset8> and </Compound_dset8>
+dataset: </group/Compound_dset8> and </group_copy/Compound_dset8>
 0 differences found
-dataset: </Compound_dset9> and </Compound_dset9>
+dataset: </group/Compound_dset9> and </group_copy/Compound_dset9>
 0 differences found
 EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_90.txt b/tools/h5diff/testfiles/h5diff_90.txt
index fb23843..9965ab0 100644
--- a/tools/h5diff/testfiles/h5diff_90.txt
+++ b/tools/h5diff/testfiles/h5diff_90.txt
@@ -30,7 +30,6 @@ dataset: </g1/dset4> and </g1/dset4>
 group  : </g2> and </g2>
 0 differences found
 dataset: </g2/dset1> and </g2/dset1>
-Not comparable: </g2/dset1> or </g2/dset1> is an empty dataset
 0 differences found
 dataset: </g2/dset2> and </g2/dset2>
 0 differences found
@@ -47,10 +46,5 @@ dataset: </g2/dset7> and </g2/dset7>
 dataset: </g2/dset8> and </g2/dset8>
 0 differences found
 dataset: </g2/dset9> and </g2/dset9>
-Not comparable: </g2/dset9> or </g2/dset9> is an empty dataset
 0 differences found
---------------------------------
-Some objects are not comparable
---------------------------------
-Use -c for a list of objects.
 EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_basic1.h5 b/tools/h5diff/testfiles/h5diff_basic1.h5
index 4f3cf9a..d97017e 100644
--- a/tools/h5diff/testfiles/h5diff_basic1.h5
+++ b/tools/h5diff/testfiles/h5diff_basic1.h5
diff --git a/tools/h5diff/testfiles/h5diff_comp_vl_strs.h5 b/tools/h5diff/testfiles/h5diff_comp_vl_strs.h5
index dac510f..4ad6f19 100644
--- a/tools/h5diff/testfiles/h5diff_comp_vl_strs.h5
+++ b/tools/h5diff/testfiles/h5diff_comp_vl_strs.h5