169 lines
3.5 KiB
C++
169 lines
3.5 KiB
C++
// Copyright (c) 2000 Microsoft Corporation. All rights reserved.
|
|
//
|
|
// Implementation of CSourceText.
|
|
//
|
|
|
|
#include "stdinc.h"
|
|
#include "dll.h"
|
|
#include "sourcetext.h"
|
|
|
|
const GUID CLSID_DirectMusicSourceText = { 0xc70eb77f, 0xefd4, 0x4678, { 0xa2, 0x7b, 0xbf, 0x16, 0x48, 0xf3, 0xd, 0x4 } }; // {C70EB77F-EFD4-4678-A27B-BF1648F30D04}
|
|
const GUID IID_IDirectMusicSourceText = { 0xa384ffed, 0xa708, 0x48de, { 0x85, 0x5b, 0x90, 0x63, 0x8b, 0xa5, 0xc0, 0xac } }; // {A384FFED-A708-48de-855B-90638BA5C0AC}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Creation
|
|
|
|
CSourceText::CSourceText()
|
|
: m_cRef(0)
|
|
{
|
|
LockModule(true);
|
|
}
|
|
|
|
HRESULT
|
|
CSourceText::CreateInstance(IUnknown* pUnknownOuter, const IID& iid, void** ppv)
|
|
{
|
|
*ppv = NULL;
|
|
if (pUnknownOuter)
|
|
return CLASS_E_NOAGGREGATION;
|
|
|
|
CSourceText *pInst = new CSourceText;
|
|
if (pInst == NULL)
|
|
return E_OUTOFMEMORY;
|
|
|
|
return pInst->QueryInterface(iid, ppv);
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// IUnknown
|
|
|
|
STDMETHODIMP
|
|
CSourceText::QueryInterface(const IID &iid, void **ppv)
|
|
{
|
|
V_INAME(CSourceText::QueryInterface);
|
|
V_PTRPTR_WRITE(ppv);
|
|
V_REFGUID(iid);
|
|
|
|
if (iid == IID_IUnknown || iid == IID_IDirectMusicSourceText)
|
|
{
|
|
*ppv = static_cast<IDirectMusicSourceText*>(this);
|
|
}
|
|
else if (iid == IID_IDirectMusicObject)
|
|
{
|
|
*ppv = static_cast<IDirectMusicObject*>(this);
|
|
}
|
|
else if (iid == IID_IPersistStream)
|
|
{
|
|
*ppv = static_cast<IPersistStream*>(this);
|
|
}
|
|
else if (iid == IID_IPersist)
|
|
{
|
|
*ppv = static_cast<IPersist*>(this);
|
|
}
|
|
else
|
|
{
|
|
*ppv = NULL;
|
|
return E_NOINTERFACE;
|
|
}
|
|
|
|
reinterpret_cast<IUnknown*>(this)->AddRef();
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG)
|
|
CSourceText::AddRef()
|
|
{
|
|
return InterlockedIncrement(&m_cRef);
|
|
}
|
|
|
|
STDMETHODIMP_(ULONG)
|
|
CSourceText::Release()
|
|
{
|
|
if (!InterlockedDecrement(&m_cRef))
|
|
{
|
|
delete this;
|
|
LockModule(false);
|
|
return 0;
|
|
}
|
|
|
|
return m_cRef;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// IPersistStream
|
|
|
|
STDMETHODIMP
|
|
CSourceText::Load(IStream* pStream)
|
|
{
|
|
V_INAME(CSourceText::Load);
|
|
V_INTERFACE(pStream);
|
|
|
|
// Record the stream's current position
|
|
LARGE_INTEGER li;
|
|
ULARGE_INTEGER ulStart;
|
|
ULARGE_INTEGER ulEnd;
|
|
li.HighPart = 0;
|
|
li.LowPart = 0;
|
|
|
|
HRESULT hr = pStream->Seek(li, STREAM_SEEK_CUR, &ulStart);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
assert(ulStart.HighPart == 0); // We don't expect streams that big.
|
|
DWORD dwSavedPos = ulStart.LowPart;
|
|
|
|
// Get the stream's end and record the total size
|
|
hr = pStream->Seek(li, STREAM_SEEK_END, &ulEnd);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
|
|
assert(ulEnd.HighPart == 0);
|
|
assert(ulEnd.LowPart > dwSavedPos);
|
|
DWORD cch = ulEnd.LowPart - dwSavedPos;
|
|
|
|
// Go back to the start and copy the characters
|
|
li.HighPart = 0;
|
|
li.LowPart = dwSavedPos;
|
|
hr = pStream->Seek(li, STREAM_SEEK_SET, &ulStart);
|
|
if (FAILED(hr))
|
|
return hr;
|
|
assert(ulStart.LowPart == dwSavedPos);
|
|
|
|
CHAR *paszSource = new CHAR[cch + 1];
|
|
if (!paszSource)
|
|
return E_OUTOFMEMORY;
|
|
|
|
DWORD cbRead;
|
|
hr = pStream->Read(paszSource, cch, &cbRead);
|
|
if (FAILED(hr))
|
|
{
|
|
assert(false);
|
|
return hr;
|
|
}
|
|
|
|
paszSource[cch] = '\0';
|
|
|
|
m_wstrText.AssignFromA(paszSource);
|
|
delete[] paszSource;
|
|
if (!m_wstrText)
|
|
return E_OUTOFMEMORY;
|
|
|
|
m_cwchText = wcslen(m_wstrText);
|
|
return S_OK;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// IDirectMusicSourceText
|
|
|
|
STDMETHODIMP_(void)
|
|
CSourceText::GetTextLength(DWORD *pcwchRequiredBufferSize)
|
|
{
|
|
*pcwchRequiredBufferSize = m_cwchText + 1;
|
|
}
|
|
|
|
STDMETHODIMP_(void)
|
|
CSourceText::GetText(WCHAR *pwszText)
|
|
{
|
|
wcscpy(pwszText, m_wstrText);
|
|
}
|