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[svn-r13386] Problem:

Browse Source 
Example incorrectly assumed that string attribute had index 2. 
	As a result H5Aread failed.

Solution:
	Interate through all attributes and find the string, after that read it.

Platforms tested:
	kagiso, copper
This commit is contained in:
Elena Pourmal 2007-02-25 11:46:36 -05:00
parent 0d86163705
commit cd8dfb4650
1 changed files with 22 additions and 13 deletions
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35
examples/h5_attribute.c
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@ -53,7 +53,8 @@ main (void)
hid_t attr1, attr2, attr3; /* Attribute identifiers */
hid_t attr;
hid_t aid1, aid2, aid3; /* Attribute dataspace identifiers */
hid_t atype; /* Attribute type */
hid_t atype, atype_mem; /* Attribute type */
H5T_class_t type_class;
hsize_t fdim[] = {SIZE};
hsize_t adim[] = {ADIM1, ADIM2}; /* Dimensions of the first attribute */
@ -62,9 +63,9 @@ main (void)
herr_t ret; /* Return value */
unsigned i,j; /* Counters */
int idx; /* Attribute index */
char string_out[80]; /* Buffer to read string attribute back */
int point_out; /* Buffer to read scalar attribute back */
int num_attr; /* Number of attributes */
/*
* Data initialization.
@ -133,7 +134,7 @@ main (void)
*/
aid3 = H5Screate(H5S_SCALAR);
atype = H5Tcopy(H5T_C_S1);
H5Tset_size(atype, 4);
H5Tset_size(atype, 5);
H5Tset_strpad(atype,H5T_STR_NULLTERM);
attr3 = H5Acreate(dataset, ANAMES, atype, aid3, H5P_DEFAULT);
@ -143,12 +144,13 @@ main (void)
ret = H5Awrite(attr3, atype, string);
/*
* Close attribute and file dataspaces.
* Close attribute and file dataspaces, and datatype.
*/
ret = H5Sclose(aid1);
ret = H5Sclose(aid2);
ret = H5Sclose(aid3);
ret = H5Sclose(fid);
ret = H5Tclose(atype);
/*
* Close the attributes.
@ -187,20 +189,27 @@ main (void)
ret = H5Aclose(attr);
/*
* Attach to the string attribute using its index, then read and display the value.
* Find string attribute by iterating through all attributes
*/
attr = H5Aopen_idx(dataset, 2);
atype = H5Tcopy(H5T_C_S1);
H5Tset_size(atype, 5);
ret = H5Aread(attr, atype, string_out);
printf("The value of the attribute with index 1 is %s \n", string_out);
ret = H5Aclose(attr);
ret = H5Tclose(atype);
num_attr = H5Aget_num_attrs(dataset);
for(i=0; i < num_attr; i++) {
attr = H5Aopen_idx(dataset, i);
atype = H5Aget_type(attr);
type_class = H5Tget_class(atype);
if (type_class == H5T_STRING) {
atype_mem = H5Tget_native_type(atype, H5T_DIR_ASCEND);
ret = H5Aread(attr, atype_mem, string_out);
printf("Found string attribute; its index is %d , value = %s \n", i, string_out);
ret = H5Tclose(atype_mem);
}
ret = H5Aclose(attr);
ret = H5Tclose(atype);
}
/*
* Get attribute info using iteration function.
*/
idx = H5Aiterate(dataset, NULL, attr_info, NULL);
ret = H5Aiterate(dataset, NULL, attr_info, NULL);
/*
* Close the dataset and the file.