1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have *
* access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
#include <string>
#ifdef OLD_HEADER_FILENAME
#include <iostream.h>
#else
#include <iostream>
#endif
#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, const void *buf ) const
{
herr_t ret_value = H5Awrite( id, mem_type.getId(), buf );
if( ret_value < 0 )
{
throw AttributeIException("Attribute::write", "H5Awrite failed");
}
}
void Attribute::write( const DataType& mem_type, const string& strg ) const
{
// Convert string to C-string
const char* strg_C;
strg_C = strg.c_str(); // strg_C refers to the contents of strg as a C-str
herr_t ret_value = H5Awrite( id, mem_type.getId(), strg_C );
if( ret_value < 0 )
{
throw AttributeIException("Attribute::write", "H5Awrite failed");
}
}
// Reads data from this attribute.
void Attribute::read( const DataType& mem_type, string& strg ) const
{
size_t size = mem_type.getSize();
char* strg_C = new char[size+1]; // temporary C-string for C API
herr_t ret_value = H5Aread( id, mem_type.getId(), strg_C );
if( ret_value < 0 )
{
throw AttributeIException("Attribute::read", "H5Aread failed");
}
strg = strg_C;
delete strg_C;
}
// 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("Attribute::read", "H5Aread failed");
}
}
// 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("Attribute::getSpace", "H5Aget_space failed");
}
}
// 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(0, "H5Aget_type failed");
}
}
// Gets the name of this attribute, returning its length.
ssize_t Attribute::getName( size_t buf_size, string& attr_name ) 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
ssize_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("Attribute::getName", "H5Aget_name failed");
}
// otherwise, convert the C string attribute name and return
attr_name = name_C;
delete name_C;
return( name_size );
}
// Gets the name of this attribute, returning the name, not the length.
string Attribute::getName( size_t buf_size ) const
{
string attr_name;
ssize_t name_size = getName( buf_size, attr_name );
return( attr_name );
// let caller catch exception if any
}
// 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(0, "H5Aclose failed");
}
}
// 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
try {
resetIdComponent( this ); }
catch (Exception close_error) { // thrown by p_close
cerr << "Attribute::~Attribute - " << close_error.getDetailMsg() << endl;
}
}
#ifndef H5_NO_NAMESPACE
} // end namespace
#endif
|
