Given an HDF5 datatype identifier, this function creates a description of this datatype in lang_type language format. A preliminary H5LTdtype_to_text call can be made to determine the size of the buffer needed with a NULL passed in for str. This value is returned as len. That value can then be assigned to len for a second H5Ttype_to_text call, which will retrieve the actual text description for the datatype. If len is not big enough for the description, the text description will be truncated to fit in the buffer. Currently only DDL (H5LT_DDL) is supported for lang_type. The complete DDL definition of HDF5 data types can be found in the last chapter of the HDF5 User’s Guide. An example of DDL definition of enum type is shown as follows. “H5T_ENUM { H5T_NATIVE_INT;
“Bob” 0;
“Elena” 1;
“Quincey” 2;
“Frank” 3; }” | 