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// $Id: field_binary.cpp,v 1.27 2003/03/02 14:23:59 t1mpy Exp $
// id3lib: a C++ library for creating and manipulating id3v1/v2 tags
// Copyright 1999, 2000 Scott Thomas Haug
// This library is free software; you can redistribute it and/or modify it
// under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; either version 2 of the License, or (at your
// option) any later version.
//
// This library is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
// License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with this library; if not, write to the Free Software Foundation,
// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// The id3lib authors encourage improvements and optimisations to be sent to
// the id3lib coordinator. Please see the README file for details on where to
// send such submissions. See the AUTHORS file for a list of people who have
// contributed to id3lib. See the ChangeLog file for a list of changes to
// id3lib. These files are distributed with id3lib at
// http://download.sourceforge.net/id3lib/
#include <stdio.h>
//#include <string.h>
#include <memory.h>
#include "field_impl.h"
#include "reader.h"
#include "writer.h"
#include "io_helpers.h"
#include "id3/utils.h" // has <config.h> "id3/id3lib_streams.h" "id3/globals.h" "id3/id3lib_strings.h"
using namespace dami;
size_t ID3_FieldImpl::Set(const uchar* data, size_t len)
{
size_t size = 0;
if ((this->GetType() == ID3FTY_BINARY) && data && len)
{
BString str(data, len);
size = dami::min(len, this->SetBinary(str));
}
return size;
}
/** Copies the supplied unicode string to the field.
**
** Again, like the string types, the binary Set() function copies the data
** so you may dispose of the source data after a call to this method.
**/
size_t ID3_FieldImpl::SetBinary(BString data) //< data to assign to this field.
{
size_t size = 0;
if (this->GetType() == ID3FTY_BINARY)
{
this->Clear();
size_t fixed = _fixed_size;
size = data.size();
if (fixed == 0)
{
_binary = data;
}
else
{
_binary.assign(data, 0, dami::min(size, fixed));
if (size < fixed)
{
_binary.append(fixed - size, '\0');
}
}
size = _binary.size();
_changed = true;
}
return size;
}
BString ID3_FieldImpl::GetBinary() const
{
BString data;
if (this->GetType() == ID3FTY_BINARY)
{
data = _binary;
}
return data;
}
const uchar* ID3_FieldImpl::GetRawBinary() const
{
const uchar* data = NULL;
if (this->GetType() == ID3FTY_BINARY)
{
data = _binary.data();
}
return data;
}
/** Copies the field's internal string to the buffer.
**
** It copies the data in the field into the buffer, for as many bytes as the
** field contains, or the size of buffer, whichever is smaller.
**
** \code
** uchar buffer[1024];
** myFrame.GetField(ID3FN_DATA)->Get(buffer, sizeof(buffer));
** \endcode
**/
size_t ID3_FieldImpl::Get(uchar *buffer, //< Destination of retrieved string
size_t max_bytes //< Max number of bytes to copy
) const
{
size_t bytes = 0;
if (this->GetType() == ID3FTY_BINARY)
{
bytes = dami::min(max_bytes, this->Size());
if (NULL != buffer && bytes > 0)
{
::memcpy(buffer, _binary.data(), bytes);
}
}
return bytes;
}
/** Copies binary data from the file specified to the field.
**
** \code
** myFrame.GetField(ID3FN_DATA)->FromFile("mypic.jpg");
** \endcode
**/
void ID3_FieldImpl::FromFile(const char *info //< Source filename
)
{
if (this->GetType() != ID3FTY_BINARY || NULL == info)
{
return;
}
FILE* temp_file = ::fopen(info, "rb");
if (temp_file != NULL)
{
::fseek(temp_file, 0, SEEK_END);
size_t fileSize = ::ftell(temp_file);
::fseek(temp_file, 0, SEEK_SET);
uchar* buffer = new uchar[fileSize];
if (buffer != NULL)
{
::fread(buffer, 1, fileSize, temp_file);
this->Set(buffer, fileSize);
delete [] buffer;
}
::fclose(temp_file);
}
}
/** Copies binary data from the field to the specified file.
**
** \code
** myFrame.GetField(ID3FN_DATA)->ToFile("output.bin");
** \endcode
**/
void ID3_FieldImpl::ToFile(const char *info //< Destination filename
) const
{
if (this->GetType() != ID3FTY_BINARY || NULL == info)
{
return;
}
size_t size = this->Size();
if (size > 0)
{
FILE* temp_file = ::fopen(info, "wb");
if (temp_file != NULL)
{
::fwrite(_binary.data(), 1, size, temp_file);
::fclose(temp_file);
}
}
return ;
}
bool ID3_FieldImpl::ParseBinary(ID3_Reader& reader)
{
// copy the remaining bytes, unless we're fixed length, in which case copy
// the minimum of the remaining bytes vs. the fixed length
_binary = io::readAllBinary(reader);
return true;
}
void ID3_FieldImpl::RenderBinary(ID3_Writer& writer) const
{
writer.writeChars(this->GetRawBinary(), this->Size());
}
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