www.pudn.com > eMule0.47c-Sources.zip > ID3Field.cpp

///////////////////////////////////////////////////////////////////////////// 
// Copyright (c) 2000 John Adcock.  All rights reserved. 
///////////////////////////////////////////////////////////////////////////// 
// 
// 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/ 
// 
///////////////////////////////////////////////////////////////////////////// 
// ID3Field.cpp : Implementation of CID3Field 
///////////////////////////////////////////////////////////////////////////// 
// Change Log 
// 
// Date          Developer             Changes 
// 
// 05 Jan 2000   John Adcock           Original Release     
// 26 Apr 2000   John Adcock           Got working with id3lib 3.7.3 
// 18 Aug 2000   Philip Oldaker        Added Picture Functionality 
// 
///////////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "ID3COM.h" 
#include "ID3Field.h" 
#include "ID3Frame.h" 
 
///////////////////////////////////////////////////////////////////////////// 
// CID3Field 
 
CID3Field::CID3Field() 
{ 
	m_Field = NULL; 
	m_FrameParent = NULL; 
} 
 
CID3Field::~CID3Field() 
{ 
	if(m_FrameParent != NULL) 
	{ 
		m_FrameParent->Release(); 
	} 
	m_Field = NULL; 
} 
 
IID3ComField* CID3Field::CreateObject(IID3ComFrame* FrameParent, ID3_Field* Field) 
{ 
	CComObject* pRetVal = new CComObject; 
	pRetVal->m_Field = Field; 
	pRetVal->m_FrameParent = FrameParent; 
	FrameParent->AddRef(); 
	return (IID3ComField*)pRetVal; 
} 
 
STDMETHODIMP CID3Field::InterfaceSupportsErrorInfo(REFIID riid) 
{ 
	static const IID* arr[] =  
	{ 
		&IID_IID3ComField 
	}; 
	for (int i=0; i < sizeof(arr) / sizeof(arr[0]); i++) 
	{ 
		if (InlineIsEqualGUID(*arr[i],riid)) 
			return S_OK; 
	} 
	return S_FALSE; 
} 
 
STDMETHODIMP CID3Field::get_Text(long ItemNum, BSTR *pVal) 
{ 
    USES_CONVERSION; 
	luint TryChars = 0; 
	luint GotChars = 0; 
	try 
	{ 
		*pVal = NULL; 
		size_t nText = m_Field->Size(); 
        if(m_Field->GetEncoding() == ID3TE_UNICODE) 
        { 
		    unicode_t* sText = new unicode_t[nText + 1]; 
		    try  
		    { 
			    m_Field->Get(sText, nText, ItemNum - 1); 
			    sText[nText] = '\0'; 
			    *pVal = SysAllocString(sText); 
		    } 
		    catch (...) 
		    { 
			    *pVal = NULL; 
		    } 
		    delete [] sText; 
        } 
        else 
        { 
		    char* sText = new char[nText + 1]; 
		    try  
		    { 
			    m_Field->Get(sText, nText, ItemNum - 1); 
			    sText[nText] = '\0'; 
			    *pVal = SysAllocString(A2W(sText)); 
		    } 
		    catch (...) 
		    { 
			    *pVal = NULL; 
		    } 
		    delete [] sText; 
        } 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::put_Text(long ItemNum, BSTR newVal) 
{ 
	try 
	{ 
		m_Field->Set(newVal); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::get_Long(long *pVal) 
{ 
	try 
	{ 
		*pVal = m_Field->Get(); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::put_Long(long newVal) 
{ 
	try 
	{ 
		m_Field->Set(newVal); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::Clear() 
{ 
	try 
	{ 
		m_Field->Clear(); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::CopyDataToFile(BSTR FileName) 
{ 
	USES_CONVERSION; 
	try 
	{ 
		m_Field->ToFile(OLE2A(FileName)); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::CopyDataFromFile(BSTR FileName) 
{ 
	USES_CONVERSION; 
	try 
	{ 
		m_Field->FromFile(OLE2A(FileName)); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::get_NumTextItems(long *pVal) 
{ 
	try 
	{ 
		*pVal = m_Field->GetNumTextItems(); 
		return S_OK; 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
} 
 
STDMETHODIMP CID3Field::get_Binary(BSTR *pVal) 
{ 
	// TODO: Add your implementation code here 
	if (pVal == NULL) 
		return E_POINTER; 
	try 
	{ 
		*pVal = NULL; 
		const uchar *pData = m_Field->GetRawBinary(); 
		if (pData == NULL) 
			return E_FAIL; 
		ID3_Frame *pFrame = ((CID3Frame*)m_FrameParent)->GetID3Frame();		 
		if (pFrame->GetID() == ID3FID_PICTURE) 
		{ 
			*pVal = _bstr_t((LPCTSTR)pData).copy();			 
		} 
		else 
		{ 
			*pVal = SysAllocStringByteLen((const char *)pData,m_Field->Size()); 
		} 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
	return S_OK; 
} 
 
STDMETHODIMP CID3Field::put_Binary(BSTR newVal) 
{ 
	// TODO: Add your implementation code here 
	try 
	{ 
		size_t Size = SysStringByteLen(newVal); 
		m_Field->Set((const uchar *)newVal,Size); 
	} 
	catch (...) 
	{ 
		return Error(IDS_UNEXPECTED_ERROR, IID_IID3ComField, E_UNEXPECTED); 
	} 
	return S_OK; 
} 
/////////////////////////////////////////////////////// 
// End Added Philip Oldaker 12-Aug 2000 
///////////////////////////////////////////////////////