diff options
Diffstat (limited to 'c++/src/H5DataType.cpp')
| -rw-r--r-- | c++/src/H5DataType.cpp | 123 |
1 files changed, 113 insertions, 10 deletions
diff --git a/c++/src/H5DataType.cpp b/c++/src/H5DataType.cpp index 57f9361..11b30cc 100644 --- a/c++/src/H5DataType.cpp +++ b/c++/src/H5DataType.cpp @@ -48,7 +48,7 @@ using std::endl; ///\brief Default constructor: Creates a stub datatype // Programmer Binh-Minh Ribler - 2000 //-------------------------------------------------------------------------- -DataType::DataType() : H5Object(), id(H5I_INVALID_HID) {} +DataType::DataType() : H5Object(), id(H5I_INVALID_HID), encoded_buf(NULL), buf_size(0) {} //-------------------------------------------------------------------------- // Function: DataType overloaded constructor @@ -63,7 +63,7 @@ DataType::DataType() : H5Object(), id(H5I_INVALID_HID) {} // Removed second argument, "predefined", after changing to the // new ref counting mechanism that relies on C's ref counting. //-------------------------------------------------------------------------- -DataType::DataType(const hid_t existing_id) : H5Object(), id(existing_id) +DataType::DataType(const hid_t existing_id) : H5Object(), id(existing_id), encoded_buf(NULL), buf_size(0) { incRefCount(); // increment number of references to this id } @@ -76,7 +76,7 @@ DataType::DataType(const hid_t existing_id) : H5Object(), id(existing_id) ///\exception H5::DataTypeIException // Programmer Binh-Minh Ribler - 2000 //-------------------------------------------------------------------------- -DataType::DataType(const H5T_class_t type_class, size_t size) : H5Object() +DataType::DataType(const H5T_class_t type_class, size_t size) : H5Object(), encoded_buf(NULL), buf_size(0) { // Call C routine to create the new datatype id = H5Tcreate(type_class, size); @@ -100,7 +100,7 @@ DataType::DataType(const H5T_class_t type_class, size_t size) : H5Object() // Jul, 2008 // Added for application convenience. //-------------------------------------------------------------------------- -DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object() +DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), encoded_buf(NULL), buf_size(0) { id = H5Location::p_dereference(loc.getId(), ref, ref_type, plist, "constructor - by dereference"); } @@ -119,7 +119,7 @@ DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type, // Jul, 2008 // Added for application convenience. //-------------------------------------------------------------------------- - /* DataType::DataType(const Attribute& attr, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), id(H5I_INVALID_HID) + /* DataType::DataType(const Attribute& attr, const void* ref, H5R_type_t ref_type, const PropList& plist) : H5Object(), id(H5I_INVALID_HID), encoded_buf(NULL), buf_size(0) { id = H5Location::p_dereference(attr.getId(), ref, ref_type, plist, "constructor - by dereference"); } @@ -130,7 +130,7 @@ DataType::DataType(const H5Location& loc, const void* ref, H5R_type_t ref_type, ///\brief Copy constructor: makes a copy of the original DataType object // Programmer Binh-Minh Ribler - 2000 //-------------------------------------------------------------------------- -DataType::DataType(const DataType& original) : H5Object(), id(original.id) +DataType::DataType(const DataType& original) : H5Object(), id(original.id), encoded_buf(NULL), buf_size(0) { incRefCount(); // increment number of references to this id } @@ -148,7 +148,7 @@ DataType::DataType(const DataType& original) : H5Object(), id(original.id) // unnecessarily and will produce undefined behavior. // -BMR, Apr 2015 //-------------------------------------------------------------------------- -DataType::DataType(const PredType& pred_type) : H5Object() +DataType::DataType(const PredType& pred_type) : H5Object(), encoded_buf(NULL), buf_size(0) { // Call C routine to copy the datatype id = H5Tcopy(pred_type.getId()); @@ -170,7 +170,7 @@ DataType::DataType(const PredType& pred_type) : H5Object() // improve usability. // -BMR, Dec 2016 //-------------------------------------------------------------------------- -DataType::DataType(const H5Location& loc, const char *dtype_name) : H5Object() +DataType::DataType(const H5Location& loc, const char *dtype_name) : H5Object(), encoded_buf(NULL), buf_size(0) { id = p_opentype(loc, dtype_name); } @@ -189,7 +189,7 @@ DataType::DataType(const H5Location& loc, const char *dtype_name) : H5Object() // improve usability. // -BMR, Dec 2016 //-------------------------------------------------------------------------- -DataType::DataType(const H5Location& loc, const H5std_string& dtype_name) : H5Object() +DataType::DataType(const H5Location& loc, const H5std_string& dtype_name) : H5Object(), encoded_buf(NULL), buf_size(0) { id = p_opentype(loc, dtype_name.c_str()); } @@ -248,6 +248,102 @@ void DataType::copy(const DataSet& dset) } //-------------------------------------------------------------------------- +// Function: DataType::p_decode +// Purpose Returns an id of a type by decoding the binary object +/// description of this datatype. +///\exception H5::DataTypeIException +// Programmer Binh-Minh Ribler - Aug 2017 +//-------------------------------------------------------------------------- +hid_t DataType::p_decode() const +{ + // Make sure that the buffer can be decoded + if (encoded_buf == NULL) + { + throw DataTypeIException("DataType::p_decode", "No encoded buffer"); + } + + // Call C function to decode the binary object description + hid_t encoded_dtype_id = H5Tdecode(encoded_buf); + + // If H5Tdecode fails, raise exception + if (encoded_dtype_id < 0) + { + throw DataTypeIException("DataType::p_decode", "H5Tdecode failed"); + } + else + { + return(encoded_dtype_id); + } +} + +//-------------------------------------------------------------------------- +// Function: DataType::decode +///\brief Returns a DataType instance by decoding the binary object +/// description of this datatype. +///\exception H5::DataTypeIException +// Programmer Binh-Minh Ribler - Aug 2017 +//-------------------------------------------------------------------------- +DataType* DataType::decode() const +{ + hid_t encoded_dtype_id; + try { + encoded_dtype_id = p_decode(); + } + catch (DataTypeIException &err) { + throw; + } + DataType *encoded_dtype = new DataType; + encoded_dtype->p_setId(encoded_dtype_id); + return(encoded_dtype); +} + +//-------------------------------------------------------------------------- +// Function: DataType::encode +///\brief Creates a binary object description of this datatype. +///\exception H5::DataTypeIException +// Programmer Binh-Minh Ribler - Aug 2017 +//-------------------------------------------------------------------------- +void DataType::encode() +{ + // Call H5Tencode passing in null to determine the size of the buffer + herr_t ret_value = H5Tencode(id, NULL, &buf_size); + if (ret_value < 0) + { + throw DataTypeIException("DataType::encode", "Failed to get buf_size"); + } + + // Allocate buffer and call C function again to encode + if (buf_size > 0) + { + encoded_buf = (unsigned char *)HDcalloc((size_t)1, buf_size); + ret_value = H5Tencode(id, encoded_buf, &buf_size); + if (ret_value < 0) + { + throw DataTypeIException("DataType::encode", "H5Tencode failed"); + } + } + else + { + throw DataTypeIException("DataType::encode", "Failed to allocate buffer for encoding"); + } +} + +//-------------------------------------------------------------------------- +// Function: DataType::hasBinaryDesc +///\brief Determines whether this datatype has a binary object +/// description. +///\exception H5::DataTypeIException +// Programmer Binh-Minh Ribler - Aug 2017 +//-------------------------------------------------------------------------- +bool DataType::hasBinaryDesc() const +{ + if (encoded_buf != NULL) + return true; + else + return false; +} + +//-------------------------------------------------------------------------- // Function: DataType::operator= ///\brief Assignment operator ///\param rhs - IN: Reference to the existing datatype @@ -827,8 +923,15 @@ void DataType::close() { throw DataTypeIException(inMemFunc("close"), "H5Tclose failed"); } - // reset the id + // Reset the id id = H5I_INVALID_HID; + + // Free and reset buffer of encoded object description if it's been used + if (encoded_buf != NULL) + { + HDfree(encoded_buf); + buf_size = 0; + } } } |