1 // $Id: field_integer.cpp,v 1.21 2002/07/02 22:12:13 t1mpy Exp $
2
3 // id3lib: a C++ library for creating and manipulating id3v1/v2 tags
4 // Copyright 1999, 2000 Scott Thomas Haug
5
6 // This library is free software; you can redistribute it and/or modify it
7 // under the terms of the GNU Library General Public License as published by
8 // the Free Software Foundation; either version 2 of the License, or (at your
9 // option) any later version.
10 //
11 // This library is distributed in the hope that it will be useful, but WITHOUT
12 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
14 // License for more details.
15 //
16 // You should have received a copy of the GNU Library General Public License
17 // along with this library; if not, write to the Free Software Foundation,
18 // Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19
20 // The id3lib authors encourage improvements and optimisations to be sent to
21 // the id3lib coordinator. Please see the README file for details on where to
22 // send such submissions. See the AUTHORS file for a list of people who have
23 // contributed to id3lib. See the ChangeLog file for a list of changes to
24 // id3lib. These files are distributed with id3lib at
25 // http://download.sourceforge.net/id3lib/
26
27 #include "field_impl.h"
28 #include "id3/utils.h" // has <config.h> "id3/id3lib_streams.h" "id3/globals.h" "id3/id3lib_strings.h"
29 #include "io_helpers.h"
30
31 using namespace dami;
32
33 /** \fn ID3_Field& ID3_Field::operator=(uint32 val)
34 ** \brief A shortcut for the Set method.
35 **
36 ** \code
37 ** myFrame.GetField(ID3FN_PICTURETYPE)->= 0x0B;
38 ** \endcode
39 **
40 ** \param val The data to assign to this field
41 ** \sa Set(uint32)
42 **/
43
44 /** \brief Sets the value of the field to the specified integer.
45 ** \param data The data to assign to this field
46 **/
Set(uint32 val)47 void ID3_FieldImpl::Set(uint32 val)
48 {
49 this->SetInteger(val);
50 }
51
SetInteger(uint32 val)52 void ID3_FieldImpl::SetInteger(uint32 val)
53 {
54 if (this->GetType() == ID3FTY_INTEGER)
55 {
56 this->Clear();
57
58 _integer = val;
59 _changed = true;
60 }
61 }
62
63 /** \fn uint32 ID3_Field::Get() const
64 ** \brief Returns the value of the integer field.
65 **
66 ** \code
67 ** uint32 picType = myFrame.GetField(ID3FN_PICTURETYPE)->Get();
68 ** \endcode
69 **
70 ** \return The value of the integer field
71 **/
Get() const72 uint32 ID3_FieldImpl::Get() const
73 {
74 return this->GetInteger();
75 }
76
GetInteger() const77 uint32 ID3_FieldImpl::GetInteger() const
78 {
79 uint32 val = 0;
80 if (this->GetType() == ID3FTY_INTEGER)
81 {
82 val = _integer;
83 }
84 return val;
85 }
86
ParseInteger(ID3_Reader & reader)87 bool ID3_FieldImpl::ParseInteger(ID3_Reader& reader)
88 {
89 ID3D_NOTICE( "ID3_FieldImpl::ParseInteger(): beg = " << reader.getBeg() );
90 ID3D_NOTICE( "ID3_FieldImpl::ParseInteger(): cur = " << reader.getCur() );
91 ID3D_NOTICE( "ID3_FieldImpl::ParseInteger(): end = " << reader.getEnd() );
92 bool success = false;
93 if (!reader.atEnd())
94 {
95 this->Clear();
96 size_t fixed = this->Size();
97 size_t nBytes = (fixed > 0) ? fixed : sizeof(uint32);
98 this->Set(io::readBENumber(reader, nBytes));
99 _changed = false;
100 success = true;
101 }
102 return success;
103 }
104
RenderInteger(ID3_Writer & writer) const105 void ID3_FieldImpl::RenderInteger(ID3_Writer& writer) const
106 {
107 io::writeBENumber(writer, _integer, this->Size());
108 }
109
110