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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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 COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <string>
#include "H5private.h" // for HDmemset
#include "H5Include.h"
#include "H5Exception.h"
#include "H5IdComponent.h"
#include "H5PropList.h"
#include "H5FaccProp.h"
#include "H5FcreatProp.h"
#include "H5OcreatProp.h"
#include "H5DcreatProp.h"
#include "H5DxferProp.h"
#include "H5LcreatProp.h"
#include "H5LaccProp.h"
#include "H5DaccProp.h"
#include "H5Location.h"
#include "H5Object.h"
#include "H5DataType.h"
#include "H5DataSpace.h"
#include "H5AbstractDs.h"
#include "H5CommonFG.h"
#include "H5Group.h"
#include "H5File.h"
#include "H5DataSet.h"
#include "H5Attribute.h"
namespace H5 {
#ifndef DOXYGEN_SHOULD_SKIP_THIS
// userAttrOpWrpr interfaces between the user's function and the
// C library function H5Aiterate2
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;
}
// userVisitOpWrpr interfaces between the user's function and the
// C library function H5Ovisit2
extern "C" herr_t
userVisitOpWrpr(hid_t obj_id, const char *attr_name, const H5O_info_t *obj_info, void *op_data)
{
H5std_string s_attr_name = H5std_string(attr_name);
UserData4Visit *myData = reinterpret_cast<UserData4Visit *>(op_data);
int status = myData->op(*myData->obj, s_attr_name, obj_info, myData->opData);
return status;
}
//--------------------------------------------------------------------------
// Function: H5Object default constructor (protected)
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5Object::H5Object() : H5Location() {}
//--------------------------------------------------------------------------
// Function: f_Attribute_setId - friend
// Purpose: This function is friend to class H5::Attribute so that it
// can set Attribute::id in order to work around a problem
// described in the JIRA issue HDFFV-7947.
// Applications shouldn't need to use it.
// param attr - IN/OUT: Attribute object to be changed
// param new_id - IN: New id to set
// Programmer Binh-Minh Ribler - 2015
//--------------------------------------------------------------------------
void
f_Attribute_setId(Attribute *attr, hid_t new_id)
{
attr->p_setId(new_id);
}
#endif
//--------------------------------------------------------------------------
// 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*).
// 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, static_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::visit
///\brief Recursively visits all HDF5 objects accessible from this object.
///\param idx_type - IN: Type of index; valid values include:
/// \li \c H5_INDEX_NAME
/// \li \c H5_INDEX_CRT_ORDER
///\param order - IN: Order in which index is traversed; valid values include:
/// \li \c H5_ITER_DEC
/// \li \c H5_ITER_INC
/// \li \c H5_ITER_NATIVE
///\param user_op - IN: Callback function passing data regarding the
/// object to the calling application
///\param *op_data - IN: User-defined pointer to data required by the
/// application for its processing of the object
///\param fields - IN: Flags specifying the fields to be retrieved
/// to the callback op via the H5O_info_t argument.
/// \li \c H5O_INFO_BASIC fileno, addr, type, and rc fields
/// \li \c H5O_INFO_TIME atime, mtime, ctime, and btime fields
/// \li \c H5O_INFO_NUM_ATTRS num_attrs field
/// \li \c H5O_INFO_HDR hdr field
/// \li \c H5O_INFO_META_SIZE meta_size field
/// \li \c H5O_INFO_ALL H5O_INFO_BASIC | H5O_INFO_TIME | H5O_INFO_NUM_ATTRS | H5O_INFO_HDR
/// | H5O_INFO_META_SIZE
///\return
/// \li On success:
/// \li the return value of the first operator that returns a positive value
/// \li zero if all members were processed with no operator returning non-zero
/// \li On failure:
/// \li an exception Exception will be thrown if something went
/// wrong within the library or the operator failed
///\exception H5::Exception
///\par Description
/// For information, please refer to the H5Ovisit2 API in the HDF5
/// C Reference Manual.
// Programmer Binh-Minh Ribler - Feb, 2019
//--------------------------------------------------------------------------
void
H5Object::visit(H5_index_t idx_type, H5_iter_order_t order, visit_operator_t user_op, void *op_data,
unsigned int fields)
{
// Store the user's function and data
UserData4Visit *userData = new UserData4Visit;
userData->opData = op_data;
userData->op = user_op;
userData->obj = this;
// Call the C API passing in op wrapper and info
herr_t ret_value =
H5Ovisit2(getId(), idx_type, order, userVisitOpWrpr, static_cast<void *>(userData), fields);
// Release memory
delete userData;
// Throw exception if H5Ovisit2 failed, which could be a failure in
// the library or in the call back operator
if (ret_value < 0)
throw Exception(inMemFunc("visit"), "H5Ovisit2 failed");
}
//--------------------------------------------------------------------------
// Function: H5Object::objVersion
///\brief Returns the header version of this HDF5 object.
///\return Object version, which can have the following values:
/// \li \c H5O_VERSION_1
/// \li \c H5O_VERSION_2
///\exception H5::ObjHeaderIException
/// Exception will be thrown when:
/// - an error returned by the C API
/// - version number is not one of the valid values above
// Programmer Binh-Minh Ribler - December, 2016
//--------------------------------------------------------------------------
unsigned
H5Object::objVersion() const
{
H5O_info_t objinfo;
unsigned version = 0;
// Use C API to get information of the object
herr_t ret_value = H5Oget_info2(getId(), &objinfo, H5O_INFO_HDR);
// Throw exception if C API returns failure
if (ret_value < 0)
throw Exception(inMemFunc("objVersion"), "H5Oget_info failed");
// Return a valid version or throw an exception for invalid value
else {
version = objinfo.hdr.version;
if (version != H5O_VERSION_1 && version != H5O_VERSION_2)
throw ObjHeaderIException("objVersion", "Invalid version for object");
}
return (version);
}
//--------------------------------------------------------------------------
// 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_info2(getId(), &oinfo, H5O_INFO_NUM_ATTRS) < 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.
///\return The name of the object
// Programmer Binh-Minh Ribler - Mar, 2014
//--------------------------------------------------------------------------
ssize_t
H5Object::getObjName(char *obj_name, size_t buf_size) const
{
// H5Iget_name will get buf_size-1 chars of the name to null terminate it
ssize_t name_size = H5Iget_name(getId(), obj_name, buf_size);
// If H5Iget_name returns a negative value, raise an exception
if (name_size < 0) {
throw Exception(inMemFunc("getObjName"), "H5Iget_name failed");
}
else if (name_size == 0) {
throw Exception(inMemFunc("getObjName"), "Object must have a name, but name length is 0");
}
// Return length of the name
return (name_size);
}
//--------------------------------------------------------------------------
// Function: H5Object::getObjName
///\brief Returns the name of this object as an \a H5std_string.
///\return Name of the object
///\exception H5::Exception
// Programmer Binh-Minh Ribler - Mar, 2014
//--------------------------------------------------------------------------
H5std_string
H5Object::getObjName() const
{
H5std_string obj_name(""); // object name to return
// Preliminary call to get the size of the object name
ssize_t name_size = H5Iget_name(getId(), NULL, static_cast<size_t>(0));
// If H5Iget_name failed, throw exception
if (name_size < 0) {
throw Exception(inMemFunc("getObjName"), "H5Iget_name failed");
}
else if (name_size == 0) {
throw Exception(inMemFunc("getObjName"), "Object must have a name, but name length is 0");
}
// Object's name exists, retrieve it
else if (name_size > 0) {
char *name_C = new char[name_size + 1]; // temporary C-string
HDmemset(name_C, 0, name_size + 1); // clear buffer
// Use overloaded function
name_size = getObjName(name_C, name_size + 1);
// Convert the C object name to return
obj_name = name_C;
// Clean up resource
delete[] name_C;
}
// Return object's name
return (obj_name);
}
//--------------------------------------------------------------------------
// Function: H5Object::getObjName
///\brief Gets the name of this object, returning its length.
///\param obj_name - OUT: Buffer for the name string as \a H5std_string
///\param len - IN: Desired length of the name, default to 0
///\return Actual length of the object name
///\exception H5::Exception
///\par Description
/// This function retrieves the object's name as an std string.
/// buf_size can specify a specific length or default to 0, in
/// which case the entire name will be retrieved.
// Programmer Binh-Minh Ribler - Mar, 2014
//--------------------------------------------------------------------------
ssize_t
H5Object::getObjName(H5std_string &obj_name, size_t len) const
{
ssize_t name_size = 0;
// If no length is provided, get the entire object name
if (len == 0) {
obj_name = getObjName();
name_size = obj_name.length();
}
// If length is provided, get that number of characters in name
else {
char *name_C = new char[len + 1]; // temporary C-string
HDmemset(name_C, 0, len + 1); // clear buffer
// Use overloaded function
name_size = getObjName(name_C, len + 1);
// Convert the C object name to return
obj_name = name_C;
// Clean up resource
delete[] name_C;
}
// Otherwise, keep obj_name intact
// Return name size
return (name_size);
}
#ifndef DOXYGEN_SHOULD_SKIP_THIS
//--------------------------------------------------------------------------
// Function: H5Object destructor
///\brief Noop destructor.
// Programmer Binh-Minh Ribler - 2000
//--------------------------------------------------------------------------
H5Object::~H5Object() {}
#endif // DOXYGEN_SHOULD_SKIP_THIS
} // namespace H5
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