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// C++ informative line for the emacs editor: -*- C++ -*-
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF5. The full HDF5 copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the files COPYING and Copyright.html. COPYING can be found at the root *
* of the source code distribution tree; Copyright.html can be found at the *
* root level of an installed copy of the electronic HDF5 document set and *
* is linked from the top-level documents page. It can also be found at *
* http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#ifndef _H5Location_H
#define _H5Location_H
#include "H5Classes.h" // constains forward class declarations
// H5Location is an abstract class. It provides a collection of wrappers
// of C functions which take location IDs. Most of these were in H5Object
// but are now moved here for H5File's access.
#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif
class H5_DLLCPP H5Location; // forward declaration for UserData4Aiterate
// Define the operator function pointer for H5Aiterate().
typedef void (*attr_operator_t)( H5Location& loc/*in*/,
const H5std_string attr_name/*in*/,
void *operator_data/*in,out*/);
class UserData4Aiterate { // user data for attribute iteration
public:
attr_operator_t op;
void* opData;
H5Location* location;
};
// An H5Location can be a file, group, dataset, named datatype, or attribute.
class H5_DLLCPP H5Location : public IdComponent {
public:
// Creates an attribute for the specified object at this location
// PropList is currently not used, so always be default.
Attribute createAttribute( const char* name, const DataType& type, const DataSpace& space, const PropList& create_plist = PropList::DEFAULT ) const;
Attribute createAttribute( const H5std_string& name, const DataType& type, const DataSpace& space, const PropList& create_plist = PropList::DEFAULT ) const;
// Given its name, opens the attribute that belongs to an object at
// this location.
Attribute openAttribute( const char* name ) const;
Attribute openAttribute( const H5std_string& name ) const;
// Given its index, opens the attribute that belongs to an object at
// this location.
Attribute openAttribute( const unsigned int idx ) const;
// Flushes all buffers associated with this location to disk.
void flush( H5F_scope_t scope ) const;
// Gets the name of the file, specified by this location.
H5std_string getFileName() const;
// Determines the number of attributes at this location.
int getNumAttrs() const;
#ifndef H5_NO_DEPRECATED_SYMBOLS
// Retrieves the type of object that an object reference points to.
H5G_obj_t getObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const;
#endif /* H5_NO_DEPRECATED_SYMBOLS */
// Retrieves the type of object that an object reference points to.
H5O_type_t getRefObjType(void *ref, H5R_type_t ref_type = H5R_OBJECT) const;
// Note: getRefObjType deprecates getObjType, but getObjType's name is
// misleading, so getRefObjType is used in the new function instead.
// Iterate user's function over the attributes at this location.
int iterateAttrs(attr_operator_t user_op, unsigned* idx = NULL, void* op_data = NULL);
// Checks whether the named attribute exists at this location.
bool attrExists(const char* name) const;
bool attrExists(const H5std_string& name) const;
// Removes the named attribute from this location.
void removeAttr(const char* name) const;
void removeAttr(const H5std_string& name) const;
// Renames the named attribute to a new name.
void renameAttr(const char* oldname, const char* newname) const;
void renameAttr(const H5std_string& oldname, const H5std_string& newname) const;
// Creates a reference to a named object or to a dataset region
// in this object.
void reference(void* ref, const char* name, const DataSpace& dataspace,
H5R_type_t ref_type = H5R_DATASET_REGION) const;
void reference(void* ref, const char* name) const;
void reference(void* ref, const H5std_string& name) const;
// Open a referenced object whose location is specified by either
// a file, an HDF5 object, or an attribute.
void dereference(H5File& h5file, const void* ref, H5R_type_t ref_type = H5R_OBJECT);
void dereference(H5Object& obj, const void* ref, H5R_type_t ref_type = H5R_OBJECT);
void dereference(Attribute& attr, const void* ref, H5R_type_t ref_type = H5R_OBJECT);
// For subclasses.
virtual hid_t getId() const = 0;
protected:
#ifndef DOXYGEN_SHOULD_SKIP_THIS
// Default constructor,
H5Location();
// Creates a copy of an existing object giving the location id.
H5Location(const hid_t loc_id);
// Copy constructor.
H5Location(const H5Location& original);
// Creates a reference to an HDF5 object or a dataset region.
void p_reference(void* ref, const char* name, hid_t space_id, H5R_type_t ref_type) const;
// Dereferences a ref into an HDF5 id.
hid_t p_dereference(hid_t loc_id, const void* ref, H5R_type_t ref_type);
#ifndef H5_NO_DEPRECATED_SYMBOLS
// Retrieves the type of object that an object reference points to.
H5G_obj_t p_get_obj_type(void *ref, H5R_type_t ref_type) const;
#endif /* H5_NO_DEPRECATED_SYMBOLS */
// Retrieves the type of object that an object reference points to.
H5O_type_t p_get_ref_obj_type(void *ref, H5R_type_t ref_type) const;
// Retrieves a dataspace with the region pointed to selected.
hid_t p_get_region(void *ref, H5R_type_t ref_type) const;
// Noop destructor.
virtual ~H5Location();
#endif // DOXYGEN_SHOULD_SKIP_THIS
}; /* end class H5Location */
#ifndef H5_NO_NAMESPACE
}
#endif
#endif
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