HDF5 C++ API Reference Manual

 

 

 

H5CommonFG.h

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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     *
 * https://support.hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
 * access to either file, you may request a copy from help@hdfgroup.org.     *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

// CommonFG is a protocol class.  Its existence is simply to provide the
// common services that are provided by H5File and Group.  The file or
// group in the context of this class is referred to as 'location'.

#ifndef _CommonFG_H
#define _CommonFG_H

#ifndef H5_NO_NAMESPACE
namespace H5 {
#endif

class Group;
class H5File;
class ArrayType;
class VarLenType;
class H5_DLLCPP CommonFG {
   public:
        // Creates a new group at this location which can be a file
        // or another group.
        Group createGroup(const char* name, size_t size_hint = 0) const;
        Group createGroup(const H5std_string& name, size_t size_hint = 0) const;

        // Opens an existing group in a location which can be a file
        // or another group.
        Group openGroup(const char* name) const;
        Group openGroup(const H5std_string& name) const;

        // Creates a new dataset at this location.
        DataSet createDataSet(const char* name, const DataType& data_type, const DataSpace& data_space, const DSetCreatPropList& create_plist = DSetCreatPropList::DEFAULT) const;
        DataSet createDataSet(const H5std_string& name, const DataType& data_type, const DataSpace& data_space, const DSetCreatPropList& create_plist = DSetCreatPropList::DEFAULT) const;

        // Opens an existing dataset at this location.
        DataSet openDataSet(const char* name) const;
        DataSet openDataSet(const H5std_string& name) const;

        // Retrieves comment for the HDF5 object specified by its name.
        H5std_string getComment(const H5std_string& name) const;
        H5std_string getComment(const char* name, size_t bufsize) const;
        H5std_string getComment(const H5std_string& name, size_t bufsize) const;

        // Removes the comment for the HDF5 object specified by its name.
        void removeComment(const char* name) const;
        void removeComment(const H5std_string& name) const;

        // Sets the comment for an HDF5 object specified by its name.
        void setComment(const char* name, const char* comment) const;
        void setComment(const H5std_string& name, const H5std_string& comment) const;

        // Returns the name of the HDF5 object that the symbolic link points to.
        H5std_string getLinkval(const char* name, size_t size=0) const;
        H5std_string getLinkval(const H5std_string& name, size_t size=0) const;

        // Returns the number of objects in this group.
        hsize_t getNumObjs() const;

        // Retrieves the name of an object in this group, given the
        // object's index.
        ssize_t getObjnameByIdx(hsize_t idx, H5std_string& name, size_t size) const;
        H5std_string getObjnameByIdx(hsize_t idx) const;

        // Returns the type of an object in this group, given the
        // object's index.
        H5G_obj_t getObjTypeByIdx(hsize_t idx) const;
        H5G_obj_t getObjTypeByIdx(hsize_t idx, H5std_string& type_name) const;

        // Returns information about an HDF5 object, given by its name,
        // at this location.
        void getObjinfo(const char* name, hbool_t follow_link, H5G_stat_t& statbuf) const;
        void getObjinfo(const H5std_string& name, hbool_t follow_link, H5G_stat_t& statbuf) const;
        void getObjinfo(const char* name, H5G_stat_t& statbuf) const;
        void getObjinfo(const H5std_string& name, H5G_stat_t& statbuf) const;

        // Iterates over the elements of this group - not implemented in
        // C++ style yet.
        int iterateElems(const char* name, int *idx, H5G_iterate_t op, void *op_data);
        int iterateElems(const H5std_string& name, int *idx, H5G_iterate_t op, void *op_data);

        // Creates a link of the specified type from new_name to current_name;
        // both names are interpreted relative to the specified location id.
        void link(H5G_link_t link_type, const char* curr_name, const char* new_name) const;
        void link(H5G_link_t link_type, const H5std_string& curr_name, const H5std_string& new_name) const;

        // Removes the specified name at this location.
        void unlink(const char* name) const;
        void unlink(const H5std_string& name) const;

        // Mounts the file 'child' onto this location.
        void mount(const char* name, H5File& child, PropList& plist) const;
        void mount(const H5std_string& name, H5File& child, PropList& plist) const;

        // Unmounts the file named 'name' from this parent location.
        void unmount(const char* name) const;
        void unmount(const H5std_string& name) const;

        // Renames an object at this location.
        void move(const char* src, const char* dst) const;
        void move(const H5std_string& src, const H5std_string& dst) const;

        // Opens a generic named datatype in this location.
        DataType openDataType(const char* name) const;
        DataType openDataType(const H5std_string& name) const;

        // Opens a named array datatype in this location.
        ArrayType openArrayType(const char* name) const;
        ArrayType openArrayType(const H5std_string& name) const;

        // Opens a named compound datatype in this location.
        CompType openCompType(const char* name) const;
        CompType openCompType(const H5std_string& name) const;

        // Opens a named enumeration datatype in this location.
        EnumType openEnumType(const char* name) const;
        EnumType openEnumType(const H5std_string& name) const;

        // Opens a named integer datatype in this location.
        IntType openIntType(const char* name) const;
        IntType openIntType(const H5std_string& name) const;

        // Opens a named floating-point datatype in this location.
        FloatType openFloatType(const char* name) const;
        FloatType openFloatType(const H5std_string& name) const;

        // Opens a named string datatype in this location.
        StrType openStrType(const char* name) const;
        StrType openStrType(const H5std_string& name) const;

        // Opens a named variable length datatype in this location.
        VarLenType openVarLenType(const char* name) const;
        VarLenType openVarLenType(const H5std_string& name) const;

#ifndef DOXYGEN_SHOULD_SKIP_THIS
        virtual hid_t getLocId() const = 0;

#endif // DOXYGEN_SHOULD_SKIP_THIS

        virtual void throwException(const H5std_string& func_name, const H5std_string& msg) const = 0;

        // Default constructor.
        CommonFG();

        // Noop destructor.
        virtual ~CommonFG();

}; // end of CommonFG declaration

#ifndef H5_NO_NAMESPACE
}
#endif
#endif

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