[svn-r19407] Purpose:

 Add --exclude-path option

Description:
 Merged from hdf5 trunk (r19406).
 Specified path to an object will be excluded from comparing the two files or two groups. If group is specified all the member objects will be excluded.
Related to "1890:  h5diff excluding object for file comparison via command line"

Tested:
 jam, amani

14 files changed, 612 insertions, 17 deletions

diff --git a/tools/h5diff/CMakeLists.txt b/tools/h5diff/CMakeLists.txt
index c31f650..a22e0e3 100644
--- a/tools/h5diff/CMakeLists.txt
+++ b/tools/h5diff/CMakeLists.txt
@@ -114,6 +114,10 @@ IF (BUILD_TESTING)
       h5diff_457.txt
       h5diff_458.txt
       h5diff_459.txt
+      h5diff_480.txt
+      h5diff_481.txt
+      h5diff_482.txt
+      h5diff_483.txt
       h5diff_50.txt
       h5diff_51.txt
       h5diff_52.txt
@@ -190,6 +194,10 @@ IF (BUILD_TESTING)
       h5diff_danglelinks2.h5
       h5diff_grp_recurse1.h5
       h5diff_grp_recurse2.h5
+      h5diff_exclude1-1.h5
+      h5diff_exclude1-2.h5
+      h5diff_exclude2-1.h5
+      h5diff_exclude2-2.h5
   )
 
   FOREACH (txt_file ${HDF5_REFERENCE_FILES})
@@ -296,6 +304,13 @@ SET (DANGLE_LINK_FILE1 h5diff_danglelinks1.h5)
 SET (DANGLE_LINK_FILE2 h5diff_danglelinks2.h5)
 SET (GRP_RECURSE_FILE1 h5diff_grp_recurse1.h5)
 SET (GRP_RECURSE_FILE2 h5diff_grp_recurse2.h5)
+# same structure, same obj name with different value
+SET (EXCLUDE_FILE1_1 h5diff_exclude1-1.h5)
+SET (EXCLUDE_FILE1_2 h5diff_exclude1-2.h5)
+# different structure and obj names
+SET (EXCLUDE_FILE2_1 h5diff_exclude2-1.h5)
+SET (EXCLUDE_FILE2_2 h5diff_exclude2-2.h5)
+
 
 # ############################################################################
 # # Common usage
@@ -716,6 +731,27 @@ ADD_H5_TEST (h5diff_512 -v --follow-symlinks ${GRP_RECURSE_FILE1} ${GRP_RECURSE_
 # circled soft2ext-link vs soft2ext-link
 ADD_H5_TEST (h5diff_513 -v ${GRP_RECURSE_FILE1} ${GRP_RECURSE_FILE2} /slink_grp10 /slink_grp11)
 ADD_H5_TEST (h5diff_514 -v --follow-symlinks ${GRP_RECURSE_FILE1} ${GRP_RECURSE_FILE2} /slink_grp10 /slink_grp11)
+
+
+# ##############################################################################
+# # Exclude path (--exclude-path)
+# ##############################################################################
+#
+# Same structure, same names and different value.
+#
+# Exclude the object with different value. Expect return - same
+ADD_H5_TEST (h5diff_480 0 -v --exclude-path /group1/dset3 ${EXCLUDE_FILE1_1} ${EXCLUDE_FILE1_2})
+# Verify different by not excluding. Expect return - diff
+ADD_H5_TEST (h5diff_481 1 -v ${EXCLUDE_FILE1_1} ${EXCLUDE_FILE1_2})
+
+#
+# Different structure, different names. 
+#
+# Exclude all the different objects. Expect return - same
+ADD_H5_TEST (h5diff_482 0 -v --exclude-path "/group1" --exclude-path "/dset1" ${EXCLUDE_FILE2_1} ${EXCLUDE_FILE2_2})
+# Exclude only some different objects. Expect return - diff
+ADD_H5_TEST (h5diff_483 1 -v --exclude-path "/group1" ${EXCLUDE_FILE2_1} ${EXCLUDE_FILE2_2})
+
   
 ENDIF (BUILD_TESTING)
 
diff --git a/tools/h5diff/h5diff_common.c b/tools/h5diff/h5diff_common.c
index 909d2e2..739cc18 100644
--- a/tools/h5diff/h5diff_common.c
+++ b/tools/h5diff/h5diff_common.c
@@ -42,6 +42,7 @@ static struct long_options l_opts[] = {
     { "use-system-epsilon", no_arg, 'e' },
     { "follow-symlinks", no_arg, 'l' },
     { "no-dangling-links", no_arg, 'x' },
+    { "exclude-path", require_arg, 'E' },
     { NULL, 0, '\0' }
 };
 
@@ -64,6 +65,7 @@ void parse_command_line(int argc,
 {
 
     int opt;
+    struct exclude_path_list *exclude_head, *exclude_prev, *exclude_node;
 
     /* process the command-line */
     memset(options, 0, sizeof (diff_opt_t));
@@ -74,6 +76,9 @@ void parse_command_line(int argc,
     /* NaNs are handled by default */
     options->do_nans = 1;
 
+    /* init for exclude-path option */
+    exclude_head = NULL;
+
     /* parse command line options */
     while ((opt = get_option(argc, argv, s_opts, l_opts)) != EOF)
     {
@@ -104,6 +109,35 @@ void parse_command_line(int argc,
         case 'x':
             options->no_dangle_links = 1;
             break;
+        case 'E':
+            options->exclude_path = 1;
+            
+            /* create linked list of excluding objects */
+            if( (exclude_node = (struct exclude_path_list*) malloc(sizeof(struct exclude_path_list))) == NULL)
+            {
+                printf("Error: lack of memory!\n");
+                h5diff_exit(EXIT_FAILURE);
+            }
+
+            /* init */
+            exclude_node->obj_path = opt_arg;
+            exclude_node->obj_type = H5TRAV_TYPE_UNKNOWN;
+            exclude_prev = exclude_head;
+            
+            if (NULL == exclude_head)            
+            {
+                exclude_head = exclude_node;
+                exclude_head->next = NULL;
+            }
+            else
+            {
+                while(NULL != exclude_prev->next)
+                    exclude_prev=exclude_prev->next;
+
+                exclude_node->next = NULL;
+                exclude_prev->next = exclude_node;
+            }            
+            break;
         case 'd':
             options->d=1;
 
@@ -163,6 +197,10 @@ void parse_command_line(int argc,
         }
     }
 
+    /* if exclude-path option is used, keep the exclude path list */
+    if (options->exclude_path)
+        options->exclude = exclude_head;
+
     /* if use system epsilon, unset -p and -d option */
     if (options->use_system_epsilon)
         options->d = options->p = 0;
diff --git a/tools/h5diff/h5diffgentest.c b/tools/h5diff/h5diffgentest.c
index ed2a68f..29823e4 100644
--- a/tools/h5diff/h5diffgentest.c
+++ b/tools/h5diff/h5diffgentest.c
@@ -57,6 +57,12 @@
 #define DANGLE_LINK_FILE2   "h5diff_danglelinks2.h5"
 #define GRP_RECURSE_FILE1   "h5diff_grp_recurse1.h5"
 #define GRP_RECURSE_FILE2   "h5diff_grp_recurse2.h5"
+/* same structure, same obj name with different value */
+#define EXCLUDE_FILE1_1     "h5diff_exclude1-1.h5"
+#define EXCLUDE_FILE1_2     "h5diff_exclude1-2.h5"
+/* different structure and obj names */
+#define EXCLUDE_FILE2_1     "h5diff_exclude2-1.h5"
+#define EXCLUDE_FILE2_2     "h5diff_exclude2-2.h5"
 
 #define UIMAX    4294967295u /*Maximum value for a variable of type unsigned int */
 #define STR_SIZE 3
@@ -102,6 +108,8 @@ static int test_external_links(const char *fname1, const char *fname2);
 static int test_ext2soft_links(const char *fname1, const char *fname2);
 static int test_dangle_links(const char *fname1, const char *fname2);
 static int test_group_recurse(const char *fname1, const char *fname2);
+static int test_exclude_obj1(const char *fname1, const char *fname2);
+static int test_exclude_obj2(const char *fname1, const char *fname2);
 
 /* called by test_attributes() and test_datasets() */
 static void write_attr_in(hid_t loc_id,const char* dset_name,hid_t fid,int make_diffs);
@@ -153,6 +161,10 @@ int main(void)
 
     test_group_recurse(GRP_RECURSE_FILE1, GRP_RECURSE_FILE2);
 
+    test_exclude_obj1(EXCLUDE_FILE1_1, EXCLUDE_FILE1_2);
+    test_exclude_obj2(EXCLUDE_FILE2_1, EXCLUDE_FILE2_2);
+
+
     return 0;
 }
 
@@ -2292,6 +2304,287 @@ out:
 }
 
 /*-------------------------------------------------------------------------
+*
+* Purpose: Create test files for excluding obj.
+*          Same structure, same obj names
+* Test : exclude obj with different value to verify the rest are same
+*
+* Programmer: Jonathan Kim (July, 21, 2010)
+*
+*-------------------------------------------------------------------------*/
+static int test_exclude_obj1(const char *fname1, const char *fname2)
+{
+    hid_t   fid1=0;
+    hid_t   fid2=0;
+    hid_t   gid1=0;
+    hid_t   gid2=0;
+    hsize_t dims2[2] = {2,4};
+    int data1[4][2] = {{0,0},{0,0},{0,0},{0,0}};
+    int data2[4][2] = {{0,1},{2,3},{1,2},{3,4}};
+    herr_t  status = SUCCEED;
+
+    /*-----------------------------------------------------------------------
+    * Create file(s)
+    *------------------------------------------------------------------------*/
+    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    if (fid1 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    if (fid2 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+
+   /*-----------------------------------------------------------------------
+    * Group
+    *------------------------------------------------------------------------*/
+    /* file1 */
+    gid1 = H5Gcreate2(fid1, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+    if (gid1 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    /* file2 */
+    gid2 = H5Gcreate2(fid2, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    if (gid2 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+
+    /*-----------------------------------------------------------------------
+    * Datasets 
+    *------------------------------------------------------------------------*/
+    /* file1 */
+    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid1,2,dims2,"dset2",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid1,2,dims2,"dset3",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+
+    /* file2 */
+    status = write_dset(fid2,2,dims2,"dset1",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid2,2,dims2,"dset2",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid2,2,dims2,"dset3",H5T_NATIVE_INT,data2);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+
+out:
+    /*-----------------------------------------------------------------------
+    * Close
+    *-----------------------------------------------------------------------*/
+    if(fid1)
+        H5Fclose(fid1);
+    if(fid2)
+        H5Fclose(fid2);
+    if(gid1)
+        H5Gclose(gid1);
+    if(gid2)
+        H5Gclose(gid2);
+
+    return status;
+}
+
+/*-------------------------------------------------------------------------
+*
+* Purpose: Create test files for excluding obj.
+*          different structure and name
+* Test : exclude different objs to verify the rest are same 
+*
+* Programmer: Jonathan Kim (July, 21, 2010)
+*
+*-------------------------------------------------------------------------*/
+static int test_exclude_obj2(const char *fname1, const char *fname2)
+{
+    hid_t   fid1=0;
+    hid_t   fid2=0;
+    hid_t   gid1=0;
+    hid_t   gid2=0;
+    hid_t   gid3=0;
+    hsize_t dims2[2] = {2,4};
+    int data1[4][2] = {{0,0},{0,0},{0,0},{0,0}};
+    int data2[4][2] = {{0,1},{2,3},{1,2},{3,4}};
+    herr_t  status = SUCCEED;
+
+    /*-----------------------------------------------------------------------
+    * Create file(s)
+    *------------------------------------------------------------------------*/
+    fid1 = H5Fcreate (fname1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    if (fid1 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    fid2 = H5Fcreate (fname2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
+    if (fid2 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Fcreate failed.\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+
+   /*-----------------------------------------------------------------------
+    * Group
+    *------------------------------------------------------------------------*/
+    /* file1 */
+    gid1 = H5Gcreate2(fid1, "group10", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+    if (gid1 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    /* file2 */
+    gid2 = H5Gcreate2(fid2, "group10", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    if (gid2 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+    /* subset name from group10 */
+    gid3 = H5Gcreate2(fid2, "group1", H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
+
+    if (gid3 < 0)
+    {
+        fprintf(stderr, "Error: %s> H5Gcreate2 failed.\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+
+    /*-----------------------------------------------------------------------
+    * Datasets 
+    *------------------------------------------------------------------------*/
+    /* file1 */
+    status = write_dset(fid1,2,dims2,"dset10",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(fid1,2,dims2,"dset1",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid1,2,dims2,"dset2",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname1);
+        status = FAIL;
+        goto out;
+    }
+
+
+    /* file2 */
+    status = write_dset(fid2,2,dims2,"dset10",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid2,2,dims2,"dset2",H5T_NATIVE_INT,data1);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+    status = write_dset(gid3,2,dims2,"dset3",H5T_NATIVE_INT,data2);
+    if (status == FAIL)
+    {
+        fprintf(stderr, "Error: %s> write_dset failed\n", fname2);
+        status = FAIL;
+        goto out;
+    }
+
+
+out:
+    /*-----------------------------------------------------------------------
+    * Close
+    *-----------------------------------------------------------------------*/
+    if(fid1)
+        H5Fclose(fid1);
+    if(fid2)
+        H5Fclose(fid2);
+    if(gid1)
+        H5Gclose(gid1);
+    if(gid2)
+        H5Gclose(gid2);
+    if(gid3)
+        H5Gclose(gid3);
+
+    return status;
+}
+
+/*-------------------------------------------------------------------------
 * Function: write_attr_in
 *
 * Purpose: write attributes in LOC_ID (dataset, group, named datatype)
diff --git a/tools/h5diff/testfiles/h5diff_480.txt b/tools/h5diff/testfiles/h5diff_480.txt
new file mode 100644
index 0000000..3e1f900
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_480.txt
@@ -0,0 +1,17 @@
+
+file1     file2
+---------------------------------------
+    x      x    /              
+    x      x    /dset1         
+    x      x    /group1        
+    x      x    /group1/dset2  
+
+group  : </> and </>
+0 differences found
+dataset: </dset1> and </dset1>
+0 differences found
+group  : </group1> and </group1>
+0 differences found
+dataset: </group1/dset2> and </group1/dset2>
+0 differences found
+EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_481.txt b/tools/h5diff/testfiles/h5diff_481.txt
new file mode 100644
index 0000000..c4f2448
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_481.txt
@@ -0,0 +1,30 @@
+
+file1     file2
+---------------------------------------
+    x      x    /              
+    x      x    /dset1         
+    x      x    /group1        
+    x      x    /group1/dset2  
+    x      x    /group1/dset3  
+
+group  : </> and </>
+0 differences found
+dataset: </dset1> and </dset1>
+0 differences found
+group  : </group1> and </group1>
+0 differences found
+dataset: </group1/dset2> and </group1/dset2>
+0 differences found
+dataset: </group1/dset3> and </group1/dset3>
+size:           [2x4]           [2x4]
+position        dset3           dset3           difference          
+------------------------------------------------------------
+[ 0 1 ]          0               1               1              
+[ 0 2 ]          0               2               2              
+[ 0 3 ]          0               3               3              
+[ 1 0 ]          0               1               1              
+[ 1 1 ]          0               2               2              
+[ 1 2 ]          0               3               3              
+[ 1 3 ]          0               4               4              
+7 differences found
+EXIT CODE: 1
diff --git a/tools/h5diff/testfiles/h5diff_482.txt b/tools/h5diff/testfiles/h5diff_482.txt
new file mode 100644
index 0000000..5b3c8c1
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_482.txt
@@ -0,0 +1,17 @@
+
+file1     file2
+---------------------------------------
+    x      x    /              
+    x      x    /dset10        
+    x      x    /group10       
+    x      x    /group10/dset2 
+
+group  : </> and </>
+0 differences found
+dataset: </dset10> and </dset10>
+0 differences found
+group  : </group10> and </group10>
+0 differences found
+dataset: </group10/dset2> and </group10/dset2>
+0 differences found
+EXIT CODE: 0
diff --git a/tools/h5diff/testfiles/h5diff_483.txt b/tools/h5diff/testfiles/h5diff_483.txt
new file mode 100644
index 0000000..a45e928
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_483.txt
@@ -0,0 +1,18 @@
+
+file1     file2
+---------------------------------------
+    x      x    /              
+    x           /dset1         
+    x      x    /dset10        
+    x      x    /group10       
+    x      x    /group10/dset2 
+
+group  : </> and </>
+0 differences found
+dataset: </dset10> and </dset10>
+0 differences found
+group  : </group10> and </group10>
+0 differences found
+dataset: </group10/dset2> and </group10/dset2>
+0 differences found
+EXIT CODE: 1
diff --git a/tools/h5diff/testfiles/h5diff_exclude1-1.h5 b/tools/h5diff/testfiles/h5diff_exclude1-1.h5
new file mode 100644
index 0000000..8b675ea
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_exclude1-1.h5
diff --git a/tools/h5diff/testfiles/h5diff_exclude1-2.h5 b/tools/h5diff/testfiles/h5diff_exclude1-2.h5
new file mode 100644
index 0000000..78854cd
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_exclude1-2.h5
diff --git a/tools/h5diff/testfiles/h5diff_exclude2-1.h5 b/tools/h5diff/testfiles/h5diff_exclude2-1.h5
new file mode 100644
index 0000000..8923111
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_exclude2-1.h5
diff --git a/tools/h5diff/testfiles/h5diff_exclude2-2.h5 b/tools/h5diff/testfiles/h5diff_exclude2-2.h5
new file mode 100644
index 0000000..9e42007
--- /dev/null
+++ b/tools/h5diff/testfiles/h5diff_exclude2-2.h5
diff --git a/tools/h5diff/testh5diff.sh b/tools/h5diff/testh5diff.sh
index f9d58c2..71d78e7 100755
--- a/tools/h5diff/testh5diff.sh
+++ b/tools/h5diff/testh5diff.sh
@@ -56,6 +56,12 @@ DANGLE_LINK_FILE1=h5diff_danglelinks1.h5
 DANGLE_LINK_FILE2=h5diff_danglelinks2.h5
 GRP_RECURSE_FILE1=h5diff_grp_recurse1.h5
 GRP_RECURSE_FILE2=h5diff_grp_recurse2.h5
+# same structure, same obj name with different value
+EXCLUDE_FILE1_1=h5diff_exclude1-1.h5
+EXCLUDE_FILE1_2=h5diff_exclude1-2.h5
+# different structure and obj names
+EXCLUDE_FILE2_1=h5diff_exclude2-1.h5
+EXCLUDE_FILE2_2=h5diff_exclude2-2.h5
 
 TESTNAME=h5diff
 EXIT_SUCCESS=0
@@ -727,6 +733,25 @@ TOOLTEST h5diff_512.txt -v --follow-symlinks $GRP_RECURSE_FILE1 $GRP_RECURSE_FIL
 TOOLTEST h5diff_513.txt -v $GRP_RECURSE_FILE1 $GRP_RECURSE_FILE2 /slink_grp10 /slink_grp11
 TOOLTEST h5diff_514.txt -v --follow-symlinks $GRP_RECURSE_FILE1 $GRP_RECURSE_FILE2 /slink_grp10 /slink_grp11
 
+# ##############################################################################
+# # Exclude objects (--exclude-path)
+# ##############################################################################
+#
+# Same structure, same names and different value.
+#
+# Exclude the object with different value. Expect return - same
+TOOLTEST h5diff_480.txt -v --exclude-path /group1/dset3 $EXCLUDE_FILE1_1 $EXCLUDE_FILE1_2
+# Verify different by not excluding. Expect return - diff
+TOOLTEST h5diff_481.txt -v $EXCLUDE_FILE1_1 $EXCLUDE_FILE1_2
+
+#
+# Different structure, different names. 
+#
+# Exclude all the different objects. Expect return - same
+TOOLTEST h5diff_482.txt -v --exclude-path "/group1" --exclude-path "/dset1" $EXCLUDE_FILE2_1 $EXCLUDE_FILE2_2
+# Exclude only some different objects. Expect return - diff
+TOOLTEST h5diff_483.txt -v --exclude-path "/group1" $EXCLUDE_FILE2_1 $EXCLUDE_FILE2_2
+
 
 
 # ##############################################################################
diff --git a/tools/lib/h5diff.c b/tools/lib/h5diff.c
index 2734bef..d462b45 100644
--- a/tools/lib/h5diff.c
+++ b/tools/lib/h5diff.c
@@ -224,6 +224,99 @@ out:
 }
 
 /*-------------------------------------------------------------------------
+ * Function: is_exclude_path
+ *
+ * Purpose: check if 'paths' are part of exclude path list
+ *
+ * Return:  
+ *   1 - excluded path
+ *   0 - not excluded path
+ * 
+ * Programmer: Jonathan Kim
+ * Date: Aug 23, 2010
+ *------------------------------------------------------------------------*/
+static int is_exclude_path (trav_path_t * paths, diff_opt_t *options)
+{
+    struct exclude_path_list * exclude_path_ptr;
+    int ret_cmp;
+    int ret = 0;
+    int len_grp;
+
+    /* check if exclude path option is given */
+    if (!options->exclude_path)
+        goto out;
+
+    /* assign to local exclude list pointer */
+    exclude_path_ptr = options->exclude;
+
+    /* search objects in exclude list */
+    while (NULL != exclude_path_ptr)
+    {
+        /* if given object is group, exclude its members as well */
+        if (exclude_path_ptr->obj_type == H5TRAV_TYPE_GROUP)
+        {
+            ret_cmp = HDstrncmp(exclude_path_ptr->obj_path, paths->path,
+                                strlen(exclude_path_ptr->obj_path));
+            if (ret_cmp == 0)
+            {
+                /* check if given path belong to an excluding group, if so 
+                 * exclude it as well.
+                 * This verifies if “/grp1/dset1” is only under “/grp1”, but
+                 * not under “/grp1xxx/” group.  
+                 */ 
+                len_grp = HDstrlen(exclude_path_ptr->obj_path);
+                if (paths->path[len_grp] == '/')
+                {
+                    /* belong to excluded group! */
+                    ret = 1;
+                    break;  /* while */
+                }
+            }
+        }
+        /* exclude target is not group, just exclude the object */
+        else  
+        {
+            ret_cmp = HDstrcmp(exclude_path_ptr->obj_path, paths->path);
+            if (ret_cmp == 0)
+            {
+                /* excluded non-group object */
+                ret = 1;
+                /* assign type as scan progress, which is sufficient to 
+                 * determine type for excluding groups from the above if. */
+                exclude_path_ptr->obj_type = paths->type;
+                break; /* while */
+            }
+        }
+        exclude_path_ptr = exclude_path_ptr->next;
+    }
+
+out:
+    return  ret;
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function: free_exclude_path_list
+ *
+ * Purpose: free exclud object list from diff options
+ *
+ * Programmer: Jonathan Kim
+ * Date: Aug 23, 2010
+ *------------------------------------------------------------------------*/
+static void free_exclude_path_list(diff_opt_t *options)
+{
+    struct exclude_path_list * curr = options->exclude;
+    struct exclude_path_list * next;
+
+    while (NULL != curr)
+    {
+        next = curr->next;
+        HDfree(curr);
+        curr = next;
+    }
+}
+
+/*-------------------------------------------------------------------------
  * Function: build_match_list
  *
  * Purpose: get list of matching path_name from info1 and info2
@@ -283,25 +376,33 @@ static void build_match_list (const char *objname1, trav_info_t *info1, const ch
         cmp = HDstrcmp(path1_lp, path2_lp);
 
         if(cmp == 0) {
-            infile[0] = 1;
-            infile[1] = 1;
-            trav_table_addflags(infile, path1_lp, info1->paths[curr1].type, table);
-
+            if(!is_exclude_path(&(info1->paths[curr1]), options))
+            {
+                infile[0] = 1;
+                infile[1] = 1;
+                trav_table_addflags(infile, path1_lp, info1->paths[curr1].type, table);
+            }
             curr1++;
             curr2++;
         } /* end if */
         else if(cmp < 0)
         {
-            infile[0] = 1;
-            infile[1] = 0;
-            trav_table_addflags(infile, path1_lp, info1->paths[curr1].type, table);
+            if(!is_exclude_path(&(info1->paths[curr1]), options))
+            {
+                infile[0] = 1;
+                infile[1] = 0;
+                trav_table_addflags(infile, path1_lp, info1->paths[curr1].type, table);
+            }
             curr1++;
         } /* end else-if */
         else
         {
-            infile[0] = 0;
-            infile[1] = 1;
-            trav_table_addflags(infile, path2_lp, info2->paths[curr2].type, table);
+            if (!is_exclude_path(&(info2->paths[curr2]), options))
+            {
+                infile[0] = 0;
+                infile[1] = 1;
+                trav_table_addflags(infile, path2_lp, info2->paths[curr2].type, table);
+            }
             curr2++;
         } /* end else */
     } /* end while */
@@ -311,8 +412,11 @@ static void build_match_list (const char *objname1, trav_info_t *info1, const ch
     infile[1] = 0;
     while(curr1 < info1->nused)
     {
-        path1_lp = (info1->paths[curr1].path) + path1_offset;
-        trav_table_addflags(infile, path1_lp, info1->paths[curr1].type, table);
+        if(!is_exclude_path(&(info1->paths[curr1]), options))
+        {
+            path1_lp = (info1->paths[curr1].path) + path1_offset;
+            trav_table_addflags(infile, path1_lp, info1->paths[curr1].type, table);
+        }
         curr1++;
     } /* end while */
 
@@ -321,11 +425,15 @@ static void build_match_list (const char *objname1, trav_info_t *info1, const ch
     infile[1] = 1;
     while(curr2 < info2->nused)
     {
-        path2_lp = (info2->paths[curr2].path) + path2_offset;
-        trav_table_addflags(infile, path2_lp, info2->paths[curr2].type, table);
+        if (!is_exclude_path(&(info2->paths[curr2]), options))
+        {
+            path2_lp = (info2->paths[curr2].path) + path2_offset;
+            trav_table_addflags(infile, path2_lp, info2->paths[curr2].type, table);
+        } 
         curr2++;
     } /* end while */
 
+    free_exclude_path_list (options);
    /*------------------------------------------------------
     * print the list
     */
@@ -968,10 +1076,14 @@ hsize_t diff_match(hid_t file1_id, const char *grp1, trav_info_t *info1,
     *-------------------------------------------------------------------------
     */     
        
-    /* number of different objects */
-    if ( info1->nused != info2->nused )
+    /* not valid compare nused when --exclude-path option is used */
+    if (!options->exclude_path)
     {
-        options->contents = 0;
+        /* number of different objects */
+        if ( info1->nused != info2->nused )
+        {
+            options->contents = 0;
+        }
     }
     
     /* objects in one file and not the other */
@@ -980,6 +1092,7 @@ hsize_t diff_match(hid_t file1_id, const char *grp1, trav_info_t *info1,
         if( table->objs[i].flags[0] != table->objs[i].flags[1] )
         {
             options->contents = 0;
+            break;
         }
     }
 
diff --git a/tools/lib/h5diff.h b/tools/lib/h5diff.h
index 916197d..c89b9d3 100644
--- a/tools/lib/h5diff.h
+++ b/tools/lib/h5diff.h
@@ -25,6 +25,12 @@
  * command line options
  *-------------------------------------------------------------------------
  */
+/* linked list to keep exclude path list */
+struct exclude_path_list {
+    char  *obj_path;
+    h5trav_type_t obj_type;
+    struct exclude_path_list * next;
+};
 
 typedef struct {
     int      m_quiet;               /* quiet mide: no output at all */
@@ -45,6 +51,8 @@ typedef struct {
     int      contents;              /* equal contents */
     int      do_nans;               /* consider Nans while diffing floats */
     int      m_list_not_cmp;        /* list not comparable messages */
+    int      exclude_path;          /* exclude path to an object */
+    struct   exclude_path_list * exclude; /* keep exclude path list */
 } diff_opt_t;