diff options
Diffstat (limited to 'c++/src/H5Object.cpp')
| -rw-r--r-- | c++/src/H5Object.cpp | 274 |
1 files changed, 273 insertions, 1 deletions
diff --git a/c++/src/H5Object.cpp b/c++/src/H5Object.cpp index 27a0070..0cb392d 100644 --- a/c++/src/H5Object.cpp +++ b/c++/src/H5Object.cpp @@ -19,13 +19,13 @@ #include "H5Exception.h" #include "H5IdComponent.h" #include "H5PropList.h" +#include "H5Location.h" #include "H5Object.h" #include "H5OcreatProp.h" #include "H5DcreatProp.h" #include "H5DxferProp.h" #include "H5FaccProp.h" #include "H5FcreatProp.h" -//#include "H5CommonFG.h" #include "H5DataType.h" #include "H5DataSpace.h" #include "H5AbstractDs.h" @@ -40,6 +40,19 @@ namespace H5 { #endif #ifndef DOXYGEN_SHOULD_SKIP_THIS +// userAttrOpWrpr simply interfaces between the user's function and the +// C library function H5Aiterate2; used to resolve the different prototype +// problem. May be moved to Iterator later. +extern "C" herr_t userAttrOpWrpr(hid_t loc_id, const char *attr_name, + const H5A_info_t *ainfo, void *op_data) +{ + H5std_string s_attr_name = H5std_string( attr_name ); + UserData4Aiterate* myData = reinterpret_cast<UserData4Aiterate *> (op_data); + myData->op( *myData->location, s_attr_name, myData->opData ); + return 0; +} +#endif + //-------------------------------------------------------------------------- // Function: H5Object default constructor (protected) // Programmer Binh-Minh Ribler - 2000 @@ -74,6 +87,264 @@ H5Object::H5Object() : H5Location() {} //-------------------------------------------------------------------------- // H5Object::H5Object(const H5Object& original) : H5Location() {} + +//-------------------------------------------------------------------------- +// Function: H5Object::createAttribute +///\brief Creates an attribute for a group, dataset, or named datatype. +///\param name - IN: Name of the attribute +///\param data_type - IN: Datatype for the attribute +///\param data_space - IN: Dataspace for the attribute - only simple +/// dataspaces are allowed at this time +///\param create_plist - IN: Creation property list - default to +/// PropList::DEFAULT +///\return Attribute instance +///\exception H5::AttributeIException +///\par Description +/// The attribute name specified in \a name must be unique. +/// Attempting to create an attribute with the same name as an +/// existing attribute will raise an exception, leaving the +/// pre-existing attribute intact. To overwrite an existing +/// attribute with a new attribute of the same name, first +/// delete the existing one with \c H5Object::removeAttr, then +/// recreate it with this function. +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +Attribute H5Object::createAttribute( const char* name, const DataType& data_type, const DataSpace& data_space, const PropList& create_plist ) const +{ + hid_t type_id = data_type.getId(); + hid_t space_id = data_space.getId(); + hid_t plist_id = create_plist.getId(); + hid_t attr_id = H5Acreate2(getId(), name, type_id, space_id, plist_id, H5P_DEFAULT ); + + // If the attribute id is valid, create and return the Attribute object + if( attr_id > 0 ) + { + Attribute attr; + f_Attribute_setId(&attr, attr_id); + return( attr ); + } + else + throw AttributeIException(inMemFunc("createAttribute"), "H5Acreate2 failed"); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::createAttribute +///\brief This is an overloaded member function, provided for convenience. +/// It differs from the above function in that it takes +/// a reference to an \c H5std_string for \a name. +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +Attribute H5Object::createAttribute( const H5std_string& name, const DataType& data_type, const DataSpace& data_space, const PropList& create_plist ) const +{ + return( createAttribute( name.c_str(), data_type, data_space, create_plist )); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::openAttribute +///\brief Opens an attribute given its name. +///\param name - IN: Name of the attribute +///\return Attribute instance +///\exception H5::AttributeIException +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +Attribute H5Object::openAttribute( const char* name ) const +{ + hid_t attr_id = H5Aopen(getId(), name, H5P_DEFAULT); + if( attr_id > 0 ) + { + Attribute attr; + f_Attribute_setId(&attr, attr_id); + return( attr ); + } + else + { + throw AttributeIException(inMemFunc("openAttribute"), "H5Aopen failed"); + } +} + +//-------------------------------------------------------------------------- +// Function: H5Object::openAttribute +///\brief This is an overloaded member function, provided for convenience. +/// It differs from the above function in that it takes +/// a reference to an \c H5std_string for \a name. +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +Attribute H5Object::openAttribute( const H5std_string& name ) const +{ + return( openAttribute( name.c_str()) ); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::openAttribute +///\brief Opens an attribute given its index. +///\param idx - IN: Index of the attribute, a 0-based, non-negative integer +///\return Attribute instance +///\exception H5::AttributeIException +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +Attribute H5Object::openAttribute( const unsigned int idx ) const +{ + hid_t attr_id = H5Aopen_by_idx(getId(), ".", H5_INDEX_CRT_ORDER, + H5_ITER_INC, static_cast<hsize_t>(idx), H5P_DEFAULT, H5P_DEFAULT); + if( attr_id > 0 ) + { + Attribute attr; + f_Attribute_setId(&attr, attr_id); + return(attr); + } + else + { + throw AttributeIException(inMemFunc("openAttribute"), "H5Aopen_by_idx failed"); + } +} + +//-------------------------------------------------------------------------- +// Function: H5Object::iterateAttrs +///\brief Iterates a user's function over all the attributes of an H5 +/// object, which may be a group, dataset or named datatype. +///\param user_op - IN: User's function to operate on each attribute +///\param _idx - IN/OUT: Starting (IN) and ending (OUT) attribute indices +///\param op_data - IN: User's data to pass to user's operator function +///\return Returned value of the last operator if it was non-zero, or +/// zero if all attributes were processed +///\exception H5::AttributeIException +///\par Description +/// The signature of user_op is +/// void (*)(H5::H5Location&, H5std_string, void*). +/// For information, please refer to the C layer Reference Manual +/// at: +/// http://www.hdfgroup.org/HDF5/doc/RM/RM_H5A.html#Annot-Iterate +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +int H5Object::iterateAttrs( attr_operator_t user_op, unsigned *_idx, void *op_data ) +{ + // store the user's function and data + UserData4Aiterate* userData = new UserData4Aiterate; + userData->opData = op_data; + userData->op = user_op; + userData->location = this; + + // call the C library routine H5Aiterate2 to iterate the attributes + hsize_t idx = _idx ? static_cast<hsize_t>(*_idx) : 0; + int ret_value = H5Aiterate2(getId(), H5_INDEX_NAME, H5_ITER_INC, &idx, + userAttrOpWrpr, reinterpret_cast<void *>(userData)); + + // release memory + delete userData; + + if( ret_value >= 0 ) { + /* Pass back update index value to calling code */ + if (_idx) + *_idx = static_cast<unsigned>(idx); + + return( ret_value ); + } + else // raise exception when H5Aiterate returns a negative value + throw AttributeIException(inMemFunc("iterateAttrs"), "H5Aiterate2 failed"); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::getNumAttrs +///\brief Returns the number of attributes attached to this HDF5 object. +///\return Number of attributes +///\exception H5::AttributeIException +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +int H5Object::getNumAttrs() const +{ + H5O_info_t oinfo; /* Object info */ + + if(H5Oget_info(getId(), &oinfo) < 0) + throw AttributeIException(inMemFunc("getNumAttrs"), "H5Oget_info failed"); + else + return(static_cast<int>(oinfo.num_attrs)); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::attrExists +///\brief Checks whether the named attribute exists at this location. +///\param name - IN: Name of the attribute to be queried +///\exception H5::AttributeIException +// Programmer Binh-Minh Ribler - 2013 +//-------------------------------------------------------------------------- +bool H5Object::attrExists(const char* name) const +{ + // Call C routine H5Aexists to determine whether an attribute exists + // at this location, which could be specified by a file, group, dataset, + // or named datatype. + herr_t ret_value = H5Aexists(getId(), name); + if( ret_value > 0 ) + return true; + else if(ret_value == 0) + return false; + else // Raise exception when H5Aexists returns a negative value + throw AttributeIException(inMemFunc("attrExists"), "H5Aexists failed"); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::attrExists +///\brief This is an overloaded member function, provided for convenience. +/// It differs from the above function in that it takes +/// a reference to an \c H5std_string for \a name. +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +bool H5Object::attrExists(const H5std_string& name) const +{ + return(attrExists(name.c_str())); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::removeAttr +///\brief Removes the named attribute from this object. +///\param name - IN: Name of the attribute to be removed +///\exception H5::AttributeIException +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +void H5Object::removeAttr( const char* name ) const +{ + herr_t ret_value = H5Adelete(getId(), name); + if( ret_value < 0 ) + throw AttributeIException(inMemFunc("removeAttr"), "H5Adelete failed"); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::removeAttr +///\brief This is an overloaded member function, provided for convenience. +/// It differs from the above function in that it takes +/// a reference to an \c H5std_string for \a name. +// Programmer Binh-Minh Ribler - 2000 +//-------------------------------------------------------------------------- +void H5Object::removeAttr( const H5std_string& name ) const +{ + removeAttr( name.c_str() ); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::renameAttr +///\brief Renames the named attribute from this object. +///\param oldname - IN: Name of the attribute to be renamed +///\param newname - IN: New name ame of the attribute +///\exception H5::AttributeIException +// Programmer Binh-Minh Ribler - Mar, 2005 +//-------------------------------------------------------------------------- +void H5Object::renameAttr(const char* oldname, const char* newname) const +{ + herr_t ret_value = H5Arename(getId(), oldname, newname); + if (ret_value < 0) + throw AttributeIException(inMemFunc("renameAttr"), "H5Arename failed"); +} + +//-------------------------------------------------------------------------- +// Function: H5Object::renameAttr +///\brief This is an overloaded member function, provided for convenience. +/// It differs from the above function in that it takes +/// a reference to an \c H5std_string for the names. +// Programmer Binh-Minh Ribler - Mar, 2005 +//-------------------------------------------------------------------------- +void H5Object::renameAttr(const H5std_string& oldname, const H5std_string& newname) const +{ + renameAttr (oldname.c_str(), newname.c_str()); +} //-------------------------------------------------------------------------- // Function: getObjName ///\brief Given an id, returns the type of the object. @@ -185,6 +456,7 @@ ssize_t H5Object::getObjName(H5std_string& obj_name, size_t len) const return(name_size); } +#ifndef DOXYGEN_SHOULD_SKIP_THIS //-------------------------------------------------------------------------- // Function: H5Object destructor ///\brief Noop destructor. |