id3lib 3.8.3

- Main Page
- Namespaces
- Classes
- Files

- File List
- File Members

field_string_unicode.cpp
Go to the documentation of this file.
1 // $Id: field_string_unicode.cpp,v 1.33 2003/03/02 14:23:58 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
49 size_t ID3_FieldImpl::Set(const unicode_t* data)
50 {
51 size_t size = 0;
52 if (this->GetType() == ID3FTY_TEXTSTRING &&
53 this->GetEncoding() == ID3TE_UNICODE && data)
54 {
55 String text((const char*) data, ucslen(data) * 2);
56 size = this->SetText_i(text);
57 }
58 return size;
59 }
60
61 size_t ID3_FieldImpl::Add(const unicode_t* data)
62 {
63 size_t size = 0;
64 if (this->GetType() == ID3FTY_TEXTSTRING &&
65 this->GetEncoding() == ID3TE_UNICODE)
66 {
67 String text((const char*) data, ucslen(data) * 2);
68 size = this->AddText_i(text);
69 }
70 return size;
71 }
72
93 size_t ID3_FieldImpl::Get(unicode_t *buffer, size_t maxLength) const
94 {
95 size_t length = 0;
96 if (this->GetType() == ID3FTY_TEXTSTRING &&
97 this->GetEncoding() == ID3TE_UNICODE &&
98 buffer != NULL && maxLength > 0)
99 {
100 size_t size = this->Size();
101 length = dami::min(maxLength, size);
102 ::memcpy((void *)buffer, (void *)_text.data(), length * 2);
103 if (length < maxLength)
104 {
105 buffer[length] = NULL_UNICODE;
106 }
107 }
108 return length;
109 }
110
111 const unicode_t* ID3_FieldImpl::GetRawUnicodeText() const
112 {
113 const unicode_t* text = NULL;
114 if (this->GetType() == ID3FTY_TEXTSTRING &&
115 this->GetEncoding() == ID3TE_UNICODE)
116 {
117 text = (unicode_t *)_text.data();
118 }
119 return text;
120 }
121
122 const unicode_t* ID3_FieldImpl::GetRawUnicodeTextItem(size_t index) const
123 {
124 const unicode_t* text = NULL;
125 if (this->GetType() == ID3FTY_TEXTSTRING &&
126 this->GetEncoding() == ID3TE_UNICODE &&
127 index < this->GetNumTextItems())
128 {
129 String unicode = _text + '\0' + '\0';
130 text = (unicode_t *) unicode.data();
131 for (size_t i = 0; i < index; ++i)
132 {
133 text += ucslen(text) + 1;
134 }
135 }
136 return text;
137 }
138
139 size_t ID3_FieldImpl::Get(unicode_t *buffer, size_t maxLength, size_t itemNum) const
140 {
141 size_t length = 0;
142 size_t total_items = this->GetNumTextItems();
143 if (this->GetType() == ID3FTY_TEXTSTRING &&
144 this->GetEncoding() == ID3TE_UNICODE &&
145 buffer != NULL && maxLength > 0 && itemNum < total_items)
146 {
147 const unicode_t* text = this->GetRawUnicodeTextItem(itemNum);
148 if (NULL != text)
149 {
150 size_t length = dami::min(maxLength, ucslen(text));
151 ::memcpy(buffer, text, length * 2);
152 if (length < maxLength)
153 {
154 buffer[length] = NULL_UNICODE;
155 }
156 }
157 }
158
159 return length;
160 }
161
162
dami::min
const T & min(const T &a, const T &b)
Definition: utils.h:51
ID3_FieldImpl::Add
size_t Add(const char *data)
Definition: field_string_ascii.cpp:250
dami::String
std::basic_string< char > String
Definition: id3lib_strings.h:198
ID3TE_UNICODE
Definition: globals.h:146
ID3FTY_TEXTSTRING
Definition: globals.h:356
utils.h
NULL_UNICODE
#define NULL_UNICODE
Definition: globals.h:120
ID3_FieldImpl::GetRawUnicodeTextItem
const unicode_t * GetRawUnicodeTextItem(size_t) const
Definition: field_string_unicode.cpp:122
field_impl.h
dami::ucslen
size_t ID3_C_EXPORT ucslen(const unicode_t *unicode)
Definition: utils.cpp:216
ID3_FieldImpl::GetRawUnicodeText
const unicode_t * GetRawUnicodeText() const
Definition: field_string_unicode.cpp:111
ID3_FieldImpl::Get
uint32 Get() const
Returns the value of the integer field.
Definition: field_integer.cpp:72
ID3_FieldImpl::Set
void Set(uint32)
Sets the value of the field to the specified integer.
Definition: field_integer.cpp:47
NULL
#define NULL
Definition: globals.h:743
unicode_t
uint16 unicode_t
Definition: globals.h:117
ID3_FrameImpl::Size
size_t Size()
Definition: frame_impl.cpp:172