Re: questions about H5DSiterate_scales

what 's the format for printing haddr_t ?

 printf("visiting sb1.objno = %lu sb2.objno = %lu\n", 
          sb1.objno, sb2.objno);



At 10:58 AM 7/12/2005, you wrote:
>Pedro,
>    Can you look at Ed's program and see if you can help him?
>
>        Quincey
>
>[ Charset ISO-8859-15 unsupported, converting... ]
>> Howdy all!
>> 
>> I've isolated the code into it's own program, and you can see the
>> problem I'm having by compiling and running the program appended below
>> (tst_h_dimscales2.c) including its header file, tests.h, also appended
>> below.
>> 
>> This program creates a very simple HDF5 file (tst_h_dimscales2.h5),
>> with two 1D datasets. One dataset is marked as a dimension scale, the
>> other attaches it as it's dimscale. Then the file is closed. The
>> h5dump of the file at this point is included below. Everything looks
>> fine to me, including all the names.
>> 
>> The file is then reopened and I iterate through the objects. When I
>> find the dimscale I check the name, and it's fine. When I encounter
>> the other dataset, "var1", I check that it has one scale, and then
>> call iterate_scales to execute the function alien_visitor on that
>> dataset/dimscale combination.
>> 
>> The function, alien_visitor, gets the associated names of it's did and
>> dsid parameters. The did parameter yields a name, as expected:
>> "/var1". But the dsid parameter, which supposedly points to the
>> dimscale dataset, returns a name of garbage characters.
>> 
>> How do I know that dsid is really pointing to the dimscale dataset,
>> named "dimscale" in this example?
>> 
>> Is this a H5DS bug, or am I doing something horribly, tragically, but
>> hopefully not inexplicably wrong?
>> 
>> Thanks,
>> 
>> Ed
>> 
>> Here's the output:
>> 
>> ./tst_h_dimscales2
>> *** Creating a file with one var with one dimension scale...ok.
>> *** Checking that one var, one dimscale file can be read...
>> Encountered: HDF5 object obj_class 2 obj_name dimscale
>> Encountered: HDF5 object obj_class 2 obj_name var1
>> unexpected result, tst_h_dimscales2.c, line: 34
>> visiting did 0x6000003 dim 0 dsid 0x6000004 name of did /var1 
>> :???z????????
>> 1 failures
>> 
>> h5dump of tst_h_dimscales2.h5:
>> HDF5 "tst_h_dimscales2.h5" {
>> GROUP "/" {
>>    DATASET "dimscale" {
>>       DATATYPE  H5T_STD_I32LE
>>       DATASPACE  SIMPLE { ( 3 ) / ( H5S_UNLIMITED ) }
>>       DATA {
>>       (0): 0, 0, 0
>>       }
>>       ATTRIBUTE "CLASS" {
>>          DATATYPE  H5T_STRING {
>>                STRSIZE 16;
>>                STRPAD H5T_STR_NULLTERM;
>>                CSET H5T_CSET_ASCII;
>>                CTYPE H5T_C_S1;
>>             }
>>          DATASPACE  SCALAR
>>          DATA {
>>          (0): "DIMENSION_SCALE"
>>          }
>>       }
>>       ATTRIBUTE "NAME" {
>>          DATATYPE  H5T_STRING {
>>                STRSIZE 24;
>>                STRPAD H5T_STR_NULLTERM;
>>                CSET H5T_CSET_ASCII;
>>                CTYPE H5T_C_S1;
>>             }
>>          DATASPACE  SCALAR
>>          DATA {
>>          (0): "dimscale_name_attribute"
>>          }
>>       }
>>       ATTRIBUTE "REFERENCE_LIST" {
>>          DATATYPE  H5T_COMPOUND {
>>             H5T_REFERENCE "dataset";
>>             H5T_STD_I32LE "dimension";
>>          }
>>          DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
>>          DATA {
>>          (0): {
>>                DATASET 1576 /var1 ,
>>                0
>>             }
>>          }
>>       }
>>    }
>>    DATASET "var1" {
>>       DATATYPE  H5T_STD_I32LE
>>       DATASPACE  SIMPLE { ( 3 ) / ( H5S_UNLIMITED ) }
>>       DATA {
>>       (0): 0, 0, 0
>>       }
>>       ATTRIBUTE "DIMENSION_LIST" {
>>          DATATYPE  H5T_VLEN { H5T_REFERENCE}
>>          DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
>>          DATA {
>>          (0): (DATASET 976 /dimscale )
>>          }
>>       }
>>       ATTRIBUTE "DIMENSION_LABELS" {
>>          DATATYPE  H5T_STRING {
>>                STRSIZE H5T_VARIABLE;
>>                STRPAD H5T_STR_NULLTERM;
>>                CSET H5T_CSET_ASCII;
>>                CTYPE H5T_C_S1;
>>             }
>>          DATASPACE  SIMPLE { ( 1 ) / ( 1 ) }
>>          DATA {
>>          (0): "dimscale_label"
>>          }
>>       }
>>    }
>> }
>> }
>> 
>> 
>> tests.h:
>> 
>> /* This is part of the netCDF package.
>>    Copyright 2005 University Corporation for Atmospheric Research/Unidata
>>    See COPYRIGHT file for conditions of use.
>> 
>>    Common includes, defines, etc., for test code in the libsrc4
>>    directory.
>> 
>>    $Id: tests.h,v 1.6 2005/06/06 20:36:22 ed Exp $
>> */
>> #ifndef _NC4_TESTS_
>> #define _NC4_TESTS_
>> 
>> #include <config.h>
>> #include <assert.h>
>> #include <stdio.h>
>> #include <string.h>
>> #include "error.h"
>> 
>> int total_err = 0, err = 0;
>> 
>> /* This is handy for print statements. */
>> char *format_name[] = {"", "classic", "64-bit offset", "netCDF-4", "netCDF-4 
>> strict NC3"};
>> 
>> #define ERR do { \
>> fflush(stdout); /* Make sure our stdout is synced with stderr. */ \
>> err++; \
>> fprintf(stderr, "unexpected result, %s, line: %d\n", __FILE__, __LINE__); \
>> } while (0)
>> 
>> #define SUMMARIZE_ERR do { \
>>    if (err) \
>>    { \
>>       printf("%d failures\n", err); \
>>       total_err += err; \
>>       err = 0; \
>>    } \
>>    else \
>>       printf("ok.\n"); \
>> } while (0)
>> 
>> 
>> #endif /* _NC4_TESTS_ */
>> 
>> tst_h_dimscales2.c:
>> 
>> /* This is part of the netCDF package.
>>    Copyright 2005 University Corporation for Atmospheric Research/Unidata
>>    See COPYRIGHT file for conditions of use.
>> 
>>    Test HDF5 file code. These are not intended to be exhaustive tests,
>>    but they use HDF5 the same way that netCDF-4 does, so if these
>>    tests don't work, than netCDF-4 won't work either.
>> 
>>    $Id: tst_h_dimscales.c,v 1.5 2005/07/01 09:33:05 ed Exp $
>> */
>> #include "tests.h"
>> #include "H5DS.h"
>> 
>> #define FILE_NAME "tst_h_dimscales2.h5"
>> #define DIMSCALE_NAME "dimscale"
>> #define VAR1_NAME "var1"
>> #define NDIMS 1
>> #define DIM1_LEN 3
>> #define NAME_ATTRIBUTE "dimscale_name_attribute"
>> #define DIMSCALE_LABEL "dimscale_label"
>> 
>> herr_t alien_visitor(hid_t did, unsigned dim, hid_t dsid, 
>>                    void *visitor_data)
>> {
>>    char name1[NC_MAX_NAME], name2[NC_MAX_NAME];
>> 
>>    /* This should get "/var1", the name of the dataset that the scale
>>     * is attached to. */
>>    if (H5Iget_name(did, name1, NC_MAX_NAME) < 0) ERR;
>>    if (strcmp(&name1[1], VAR1_NAME)) ERR;
>>    
>>    /* This should get "/dimscale" but it doesn't seem to be! */
>>    if (H5Iget_name(dsid, name2, NC_MAX_NAME) < 0) ERR;
>>    if (strcmp(&name2[1], DIMSCALE_NAME)) ERR;
>> 
>>    printf("visiting did 0x%x dim %d dsid 0x%x name of did %s \n", 
>>         did, dim, dsid, name1);
>>    printf("name of dsid: %s\n", name2);
>>    return 0;
>> }
>> 
>> int
>> main()
>> {
>>    printf("*** Creating a file with one var with one dimension scale...");
>>    
>>    {
>>       hid_t fileid, spaceid, datasetid, dimscaleid, cparmsid;
>>       hsize_t dims[NDIMS] = {DIM1_LEN}, maxdims[NDIMS] = {H5S_UNLIMITED};
>> 
>>       /* Create file. */
>>       if ((fileid = H5Fcreate(FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, 
>>                             H5P_DEFAULT)) < 0) ERR;
>> 
>>       /* Create the space that will be used both for the dimscale and
>>        * the 1D dataset that will attach it. */
>>       if ((spaceid = H5Screate_simple(NDIMS, dims, maxdims)) < 0) ERR;
>> 
>>       /* Modify dataset creation properties, i.e. enable chunking. */
>>       dims[0] = 1;
>>       if ((cparmsid = H5Pcreate(H5P_DATASET_CREATE)) < 0) ERR;
>>       if (H5Pset_chunk(cparmsid, NDIMS, dims) < 0) ERR;
>> 
>>       /* Create our dimension scale, as an unlimited dataset. */
>>       if ((dimscaleid = H5Dcreate(fileid, DIMSCALE_NAME, H5T_NATIVE_INT, 
>>                                 spaceid, cparmsid)) < 0) ERR;
>>       if (H5DSset_scale(dimscaleid, NAME_ATTRIBUTE) < 0) ERR;
>> 
>>       /* Create a variable which uses it. */
>>       if ((datasetid = H5Dcreate(fileid, VAR1_NAME, H5T_NATIVE_INT, 
>>                               spaceid, cparmsid)) < 0) ERR;
>>       if (H5DSattach_scale(datasetid, dimscaleid, 0) < 0) ERR;
>>       if (H5DSset_label(datasetid, 0, DIMSCALE_LABEL) < 0) ERR;
>> 
>>       /* Fold up our tents. */
>>       if (H5Dclose(dimscaleid) < 0 ||
>>         H5Dclose(datasetid) < 0 ||
>>         H5Sclose(spaceid) < 0 ||
>>         H5Fclose(fileid) < 0) ERR;
>>    }
>> 
>>    SUMMARIZE_ERR;
>>    printf("*** Checking that one var, one dimscale file can be read...");
>> 
>>    {
>>       hid_t fileid, spaceid = 0, datasetid = 0;
>>       hsize_t num_obj, i;
>>       int obj_class;
>>       char obj_name[NC_MAX_NAME + 1];
>>       char dimscale_name[NC_MAX_NAME+1];
>>       htri_t is_scale;
>>       char label[NC_MAX_NAME+1];
>>       int visitor_data = 0;
>>       int num_scales;
>>       hsize_t dims[1], maxdims[1];
>> 
>>       /* Open the file. */
>>       if ((fileid = H5Fopen(FILE_NAME, H5F_ACC_RDWR, H5P_DEFAULT)) < 0) ERR;
>>       
>>       /* Loop through objects in the root group. */
>>       if (H5Gget_num_objs(fileid, &num_obj) < 0) ERR;
>>       for (i=0; i<num_obj; i++)
>>       {
>>       /* Get the type (i.e. group, dataset, etc.), and the name of
>>         * the object. */
>>       if ((obj_class = H5Gget_objtype_by_idx(fileid, i)) < 0) ERR;
>>       if (H5Gget_objname_by_idx(fileid, i, obj_name, NC_MAX_NAME) < 0) ERR;
>> 
>>       printf("\nEncountered: HDF5 object obj_class %d obj_name %s\n", 
>>               obj_class, obj_name);
>> 
>>       /* Deal with object based on its obj_class. */
>>       switch(obj_class)
>>       {
>>           case H5G_GROUP:
>>              break;
>>           case H5G_DATASET:
>>              /* Open the dataset. */
>>              if ((datasetid = H5Dopen(fileid, obj_name)) < 0) ERR;
>> 
>>              /* This should be an unlimited dataset. */
>>              if ((spaceid = H5Dget_space(datasetid)) < 0) ERR;
>>              if (H5Sget_simple_extent_dims(spaceid, dims, maxdims) < 0) ERR;
>>              if (maxdims[0] != H5S_UNLIMITED) ERR;
>> 
>>              /* Is this a dimscale? */
>>              if ((is_scale = H5DSis_scale(datasetid)) < 0) ERR;
>>              if (is_scale && strcmp(obj_name, DIMSCALE_NAME)) ERR;
>>              if (is_scale)
>>              {
>>                 /* A dimscale comes with a NAME attribute, in
>>                  * addition to it's real name. */
>>                 if (H5DSget_scale_name(datasetid, dimscale_name, 
>> NC_MAX_NAME) < 0) ERR;
>>                 if (strcmp(dimscale_name, NAME_ATTRIBUTE)) ERR;
>>              }
>>              else
>>              {
>>                 /* Here's how to get the number of scales attached
>>                  * to the dataset's dimension 0. */
>>                 if ((num_scales = H5DSget_num_scales(datasetid, 0)) < 0) ERR;
>>                 if (num_scales != 1) ERR;
>> 
>>                 /* Go through all dimscales for this var and learn about 
>> them. */
>>                 if (H5DSiterate_scales(datasetid, 0, NULL, alien_visitor, 
>>                                       &visitor_data) < 0) ERR;
>>                 
>>                 /* There's also a label for dimension 0. */
>>                 if (H5DSget_label(datasetid, 0, label, NC_MAX_NAME) < 0) ERR;
>> 
>>                 /*printf("found non-scale dataset %s, label %s\n", obj_name, 
>> label);*/
>>              }
>>              if (H5Dclose(datasetid) < 0) ERR;
>>              break;
>>           case H5G_TYPE:
>>              break;
>>           case H5G_LINK:
>>              break;
>>           default:
>>              printf("Unknown object class %d in rec_read_metadata!", 
>> obj_class);
>>       }
>>       }
>> 
>>       /* Close up the shop. */
>>       if (H5Sclose(spaceid) < 0 ||
>>         H5Fclose(fileid) < 0) ERR;
>>    }
>> 
>>    SUMMARIZE_ERR;
>> 
>>    /* Print out our number of errors, if any, and exit badly. */
>>    if (total_err)
>>    {
>>       printf("%d errors detected! Sorry!\n", total_err);
>>       return 2;
>>    }
>>    
>>    printf("*** Tests successful!\n");
>>    return 0;
>> }
>> 
>> 
>> 
>> -- 
>> Ed Hartnett  -- ed@xxxxxxxxxxxxxxxx
>> 
>> 

</Pedro Vicente Nunes>
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