winamp/Src/Winamp/DataStoreCOM.cpp

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2024-09-24 12:54:57 +00:00
#include "DataStoreCOM.h"
enum
{
DISP_DATASTORE_STORE,
DISP_DATASTORE_RETRIEVE,
DISP_DATASTORE_GENERATE_GUID,
};
#define CHECK_ID(str, id)\
if (CSTR_EQUAL == CompareStringW(lcid, NORM_IGNORECASE, rgszNames[i], -1, L##str, -1))\
{ rgdispid[i] = id; continue; }
HRESULT DataStoreCOM::GetIDsOfNames(REFIID riid, OLECHAR FAR* FAR* rgszNames, unsigned int cNames, LCID lcid, DISPID FAR* rgdispid)
{
bool unknowns = false;
for (unsigned int i = 0;i != cNames;i++)
{
CHECK_ID("Store", DISP_DATASTORE_STORE);
CHECK_ID("Retrieve", DISP_DATASTORE_RETRIEVE);
CHECK_ID("GenerateGUID", DISP_DATASTORE_GENERATE_GUID);
rgdispid[i] = DISPID_UNKNOWN;
unknowns = true;
}
if (unknowns)
return DISP_E_UNKNOWNNAME;
else
return S_OK;
}
HRESULT DataStoreCOM::GetTypeInfo(unsigned int itinfo, LCID lcid, ITypeInfo FAR* FAR* pptinfo)
{
return E_NOTIMPL;
}
HRESULT DataStoreCOM::GetTypeInfoCount(unsigned int FAR * pctinfo)
{
return E_NOTIMPL;
}
HRESULT DataStoreCOM::Invoke(DISPID dispid, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS FAR *pdispparams, VARIANT FAR *pvarResult, EXCEPINFO FAR * pexecinfo, unsigned int FAR *puArgErr)
{
switch (dispid)
{
case DISP_DATASTORE_GENERATE_GUID:
{
GUID guid;
UuidCreate(&guid);
wchar_t *guid_string;
UuidToStringW(&guid, (unsigned short **)&guid_string);
BSTR tag = SysAllocString(guid_string);
RpcStringFreeW((unsigned short **)&guid_string);
VariantInit(pvarResult);
V_VT(pvarResult) = VT_BSTR;
V_BSTR(pvarResult) = tag;
return S_OK;
}
case DISP_DATASTORE_STORE:
if (pdispparams->cArgs == 2)
{
GUID guid;
UuidFromStringW((unsigned short *)pdispparams->rgvarg[1].bstrVal, &guid);
SAFEARRAY *bufferArray=pdispparams->rgvarg[0].parray;
SAFEARRAY *store;
HRESULT hr = SafeArrayCopy(bufferArray, &store);
dataStore[guid]=store;
return hr;
}
else
return DISP_E_BADPARAMCOUNT;
case DISP_DATASTORE_RETRIEVE:
if (pdispparams->cArgs == 1)
{
GUID guid;
UuidFromStringW((unsigned short *)pdispparams->rgvarg[0].bstrVal, &guid);
SAFEARRAY *store = dataStore[guid];
if (store)
{
SAFEARRAY *bufferArray;
SafeArrayCopy(store, &bufferArray);
VariantInit(pvarResult);
V_VT(pvarResult) = VT_ARRAY|VT_UI1;
V_ARRAY(pvarResult) = bufferArray;
return S_OK;
}
else
return E_FAIL;
}
else
return DISP_E_BADPARAMCOUNT;
}
return DISP_E_MEMBERNOTFOUND;
}
STDMETHODIMP DataStoreCOM::QueryInterface(REFIID riid, PVOID *ppvObject)
{
if (!ppvObject)
return E_POINTER;
else if (IsEqualIID(riid, IID_IDispatch))
*ppvObject = (IDispatch *)this;
else if (IsEqualIID(riid, IID_IUnknown))
*ppvObject = this;
else
{
*ppvObject = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
ULONG DataStoreCOM::AddRef(void)
{
return 0;
}
ULONG DataStoreCOM::Release(void)
{
return 0;
}