winamp/Src/omBrowser/enumXmlFile.cpp

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2024-09-24 12:54:57 +00:00
#include "main.h"
#include "./enumXmlFile.h"
#include "./service.h"
#include "./ifc_omservicehost.h"
#include "./ifc_omstorage.h"
#include "./ifc_wasabihelper.h"
#include "../xml/obj_xml.h"
#include <shlwapi.h>
#include <strsafe.h>
#define XMLSIG "<?xml"
#define XMLSIG_LEN 5
EnumXmlFile::EnumXmlFile(HANDLE xmlHandle, obj_xml *xmlReader, LPCWSTR pszAddress, ifc_omservicehost *serviceHost)
: ref(1), address(NULL), hFile(xmlHandle), reader(xmlReader), readerError(OBJ_XML_SUCCESS),
buffer(NULL), bufferMax(4096)
{
address = Plugin_CopyString(pszAddress);
if (NULL != reader)
reader->AddRef();
parser.Initialize(reader, serviceHost);
}
EnumXmlFile::~EnumXmlFile()
{
Plugin_FreeString(address);
if (NULL != hFile)
CloseHandle(hFile);
parser.Finish();
if (NULL != reader)
{
if (OBJ_XML_SUCCESS == readerError)
{
reader->xmlreader_feed(0, 0);
}
reader->xmlreader_close();
ifc_wasabihelper *wasabi;
if (SUCCEEDED(Plugin_GetWasabiHelper(&wasabi)))
{
wasabi->ReleaseWasabiInterface(&obj_xmlGUID, reader);
wasabi->Release();
}
}
if (NULL != buffer)
free(buffer);
}
HRESULT EnumXmlFile::CheckXmlHeader(HANDLE hFile)
{
DWORD read = 0;
BYTE szBuffer[XMLSIG_LEN * 2] = {0};
SetFilePointer(hFile, 0, NULL, FILE_BEGIN);
if (FALSE == ReadFile(hFile, (void*)szBuffer, sizeof(szBuffer), &read, NULL))
{
DWORD error = GetLastError();
return HRESULT_FROM_WIN32(error);
}
SetFilePointer(hFile, 0, NULL, FILE_BEGIN);
if (read >= XMLSIG_LEN)
{
if (CSTR_EQUAL == CompareStringA(CSTR_INVARIANT, NORM_IGNORECASE, XMLSIG, XMLSIG_LEN, (LPSTR)szBuffer, XMLSIG_LEN) ||
CSTR_EQUAL == CompareStringW(CSTR_INVARIANT, NORM_IGNORECASE, WTEXT(XMLSIG), XMLSIG_LEN, (LPWSTR)szBuffer, XMLSIG_LEN))
{
return S_OK;
}
}
return OMSTORAGE_E_UNKNOWN_FORMAT;
}
HRESULT EnumXmlFile::CreateInstance(LPCWSTR pszAddress, ifc_omservicehost *host, EnumXmlFile **instance)
{
if (NULL == instance) return E_POINTER;
*instance = NULL;
HRESULT hr;
WCHAR szBuffer[MAX_PATH * 2] = {0};
hr = Plugin_ResolveRelativePath(pszAddress, host, szBuffer, ARRAYSIZE(szBuffer));
if (FAILED(hr)) return hr;
HANDLE hFile = CreateFile(szBuffer, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_FLAG_SEQUENTIAL_SCAN, NULL);
if (INVALID_HANDLE_VALUE == hFile)
{
DWORD error = GetLastError();
return HRESULT_FROM_WIN32(error);
}
hr = CheckXmlHeader(hFile);
if (SUCCEEDED(hr))
{
ifc_wasabihelper *wasabi;
hr = Plugin_GetWasabiHelper(&wasabi);
if (SUCCEEDED(hr))
{
obj_xml *reader;
wasabi->QueryWasabiInterface(&obj_xmlGUID, (void**)&reader);
if (NULL != reader && OBJ_XML_SUCCESS == reader->xmlreader_open())
{
*instance = new EnumXmlFile(hFile, reader, szBuffer, host);
if (NULL == *instance)
{
hr = E_OUTOFMEMORY;
// reader stil has no support for AddRef()/Release()
wasabi->ReleaseWasabiInterface(&obj_xmlGUID, reader);
}
reader->Release();
}
else
{
hr = E_UNEXPECTED;
}
wasabi->Release();
}
}
if (FAILED(hr))
{
if (NULL != hFile) CloseHandle(hFile);
}
return hr;
}
size_t EnumXmlFile::AddRef()
{
return InterlockedIncrement((LONG*)&ref);
}
size_t EnumXmlFile::Release()
{
if (0 == ref)
return ref;
LONG r = InterlockedDecrement((LONG*)&ref);
if (0 == r)
delete(this);
return r;
}
int EnumXmlFile::QueryInterface(GUID interface_guid, void **object)
{
if (NULL == object) return E_POINTER;
if (IsEqualIID(interface_guid, IFC_OmServiceEnum))
*object = static_cast<ifc_omserviceenum*>(this);
else if (IsEqualIID(interface_guid, IFC_OmXmlServiceEnum))
*object = static_cast<ifc_omxmlserviceenum*>(this);
else
{
*object = NULL;
return E_NOINTERFACE;
}
if (NULL == *object)
return E_UNEXPECTED;
AddRef();
return S_OK;
}
HRESULT EnumXmlFile::Next(ULONG listSize, ifc_omservice **elementList, ULONG *elementCount)
{
if(NULL != elementCount)
*elementCount = 0;
if (0 == listSize || NULL == elementList)
return E_INVALIDARG;
ULONG counter = 0;
HRESULT hr = S_OK;
ifc_omservice *service;
while(counter < listSize)
{
hr = parser.PeekService(&service);
if (FAILED(hr)) return hr;
if (S_OK == hr)
{
elementList[counter] = service;
counter++;
}
else
{
if (NULL == buffer)
{
buffer = (BYTE*)calloc(bufferMax, sizeof(BYTE));
if (NULL == buffer) return E_OUTOFMEMORY;
}
DWORD read = 0;
if (FALSE == ReadFile(hFile, buffer, bufferMax, &read, NULL))
{
DWORD error = GetLastError();
return HRESULT_FROM_WIN32(error);
}
if (0 == read)
{
if (OBJ_XML_SUCCESS == readerError)
reader->xmlreader_feed(0, 0);
break;
}
readerError = reader->xmlreader_feed(buffer, read);
if (OBJ_XML_SUCCESS != readerError) return E_FAIL;
}
}
if(NULL != elementCount)
*elementCount = counter;
return (counter > 0) ? S_OK : S_FALSE;
}
HRESULT EnumXmlFile::Reset(void)
{
SetFilePointer(hFile, 0, NULL, FILE_BEGIN);
readerError = OBJ_XML_SUCCESS;
reader->xmlreader_reset();
parser.Reset();
return E_NOTIMPL;
}
HRESULT EnumXmlFile::Skip(ULONG elementCount)
{
return E_NOTIMPL;
}
HRESULT EnumXmlFile::GetStatusCode(UINT *code)
{
return parser.GetCode(code);
}
HRESULT EnumXmlFile::GetStatusText(LPWSTR pszBuffer, UINT cchBufferMax)
{
return parser.GetText(pszBuffer, cchBufferMax);
}
#define CBCLASS EnumXmlFile
START_MULTIPATCH;
START_PATCH(MPIID_OMSERVICEENUM)
M_CB(MPIID_OMSERVICEENUM, ifc_omserviceenum, ADDREF, AddRef);
M_CB(MPIID_OMSERVICEENUM, ifc_omserviceenum, RELEASE, Release);
M_CB(MPIID_OMSERVICEENUM, ifc_omserviceenum, QUERYINTERFACE, QueryInterface);
M_CB(MPIID_OMSERVICEENUM, ifc_omserviceenum, API_NEXT, Next);
M_CB(MPIID_OMSERVICEENUM, ifc_omserviceenum, API_RESET, Reset);
M_CB(MPIID_OMSERVICEENUM, ifc_omserviceenum, API_SKIP, Skip);
NEXT_PATCH(MPIID_OMXMLSERVICEENUM)
M_CB(MPIID_OMXMLSERVICEENUM, ifc_omxmlserviceenum, ADDREF, AddRef);
M_CB(MPIID_OMXMLSERVICEENUM, ifc_omxmlserviceenum, RELEASE, Release);
M_CB(MPIID_OMXMLSERVICEENUM, ifc_omxmlserviceenum, QUERYINTERFACE, QueryInterface);
M_CB(MPIID_OMXMLSERVICEENUM, ifc_omxmlserviceenum, API_GETSTATUSCODE, GetStatusCode);
M_CB(MPIID_OMXMLSERVICEENUM, ifc_omxmlserviceenum, API_GETSTATUSTEXT, GetStatusText);
END_PATCH
END_MULTIPATCH;
#undef CBCLASS