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author | Binh-Minh Ribler <bmribler@hdfgroup.org> | 2000-12-07 00:04:08 (GMT) |
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committer | Binh-Minh Ribler <bmribler@hdfgroup.org> | 2000-12-07 00:04:08 (GMT) |
commit | f148ff3caf533e9f6029798617f0a8087bcd6c05 (patch) | |
tree | 00bb6ca4d0e50aa0e591eed6a0d739c04c93c5e7 /c++/src/H5Attribute.cpp | |
parent | 7df8cd5cfe22372f603ea058334647fe4017008e (diff) | |
download | hdf5-f148ff3caf533e9f6029798617f0a8087bcd6c05.zip hdf5-f148ff3caf533e9f6029798617f0a8087bcd6c05.tar.gz hdf5-f148ff3caf533e9f6029798617f0a8087bcd6c05.tar.bz2 |
[svn-r3080]
Purpose:
Support portability
Description:
I forgot that source file extension .C will not work on Windows.
Solution:
Changed all source file from *.C to *.cpp for portability.
Platforms tested:
arabica (sparc-sun-solaris 2.7)
Diffstat (limited to 'c++/src/H5Attribute.cpp')
-rw-r--r-- | c++/src/H5Attribute.cpp | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/c++/src/H5Attribute.cpp b/c++/src/H5Attribute.cpp new file mode 100644 index 0000000..03b50b9 --- /dev/null +++ b/c++/src/H5Attribute.cpp @@ -0,0 +1,122 @@ +#include <string> + +#include "H5Include.h" +#include "H5Exception.h" +#include "H5RefCounter.h" +#include "H5IdComponent.h" +#include "H5Idtemplates.h" +#include "H5PropList.h" +#include "H5Object.h" +#include "H5AbstractDs.h" +#include "H5Attribute.h" +#include "H5DataType.h" +#include "H5DataSpace.h" + +#ifndef H5_NO_NAMESPACE +namespace H5 { +#endif + +// Copy constructor: makes a copy of the original object; simply invokes +// the base class copy constructor. +Attribute::Attribute( const Attribute& original ) : AbstractDs( original ) {} + +// Creates a copy of an existing attribute using an id +Attribute::Attribute( const hid_t attr_id ) : AbstractDs( attr_id ) {} + +// Writes data to this attribute. +void Attribute::write( const DataType& mem_type, void *buf ) const +{ + herr_t ret_value = H5Awrite( id, mem_type.getId(), buf ); + if( ret_value < 0 ) + { + throw AttributeIException(); + } +} + +// Reads data from this attribute. +void Attribute::read( const DataType& mem_type, void *buf ) const +{ + herr_t ret_value = H5Aread( id, mem_type.getId(), buf ); + if( ret_value < 0 ) + { + throw AttributeIException(); + } +} + +// Gets a copy of the dataspace for this attribute. +DataSpace Attribute::getSpace() const +{ + // Calls C function H5Aget_space to get the id of the dataspace + hid_t dataspace_id = H5Aget_space( id ); + + // If the dataspace id is valid, create and return the DataSpace object + if( dataspace_id > 0 ) + { + DataSpace dataspace( dataspace_id ); + return( dataspace ); + } + else + { + throw AttributeIException(); + } +} + +// This private member function calls the C API to get the generic datatype +// of the datatype that is used by this attribute. This function is used +// by the overloaded functions getDataType defined in AbstractDs for the +// generic datatype and specific sub-types. +hid_t Attribute::p_getType() const +{ + hid_t type_id = H5Aget_type( id ); + if( type_id > 0 ) + return( type_id ); + else + { + throw AttributeIException(); + } +} + +// Gets the name of this attribute. +string Attribute::getName( size_t buf_size ) const +{ + char* name_C = new char[buf_size+1]; // temporary C-string for C API + + // Calls C routine H5Aget_name to get the name of the attribute + herr_t name_size = H5Aget_name( id, buf_size, name_C ); + + // If H5Aget_name returns a negative value, raise an exception, + if( name_size < 0 ) + { + throw AttributeIException(); + } + // otherwise, create the string to hold the attribute name and return it + string name = string( name_C ); + delete name_C; + return( name ); +} + +// This private function calls the C API H5Aclose to close this attribute. +// Used by the IdComponent::reset. +void Attribute::p_close() const +{ + herr_t ret_value = H5Aclose( id ); + if( ret_value < 0 ) + { + throw AttributeIException(); + } +} + +// The destructor of this instance calls IdComponent::reset to +// reset its identifier - no longer true +// Older compilers (baldric) don't support template member functions +// and IdComponent::reset is one; so at this time, the resetId is not +// a member function so it can be template to work around that problem. +Attribute::~Attribute() +{ + // The attribute id will be closed properly + resetIdComponent( this ); +} + +#ifndef H5_NO_NAMESPACE +} // end namespace +#endif |