130 lines
2.8 KiB
C++
130 lines
2.8 KiB
C++
#include "shellprv.h"
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#pragma hdrstop
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#include "filefldr.h"
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#include "stgenum.h"
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// Construction / Destruction
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CFSFolderEnumSTATSTG::CFSFolderEnumSTATSTG(CFSFolder* psf) :
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_cRef(1),
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_pfsf(psf),
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_cIndex(0)
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{
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_pfsf->AddRef();
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_pfsf->_GetPath(_szSearch);
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PathAppend(_szSearch, TEXT("*")); // we're looking for everything.
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_hFindFile = INVALID_HANDLE_VALUE;
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DllAddRef();
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}
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CFSFolderEnumSTATSTG::~CFSFolderEnumSTATSTG()
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{
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_pfsf->Release();
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if (_hFindFile != INVALID_HANDLE_VALUE)
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FindClose(_hFindFile);
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DllRelease();
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}
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//-----------------------------------------------------------------------------
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// IUnknown
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//-----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CFSFolderEnumSTATSTG::AddRef()
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{
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return InterlockedIncrement(&_cRef);
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}
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STDMETHODIMP_(ULONG) CFSFolderEnumSTATSTG::Release()
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{
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if (InterlockedDecrement(&_cRef))
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return _cRef;
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delete this;
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return 0;
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}
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STDMETHODIMP CFSFolderEnumSTATSTG::QueryInterface(REFIID riid, void **ppv)
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{
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static const QITAB qit[] = {
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QITABENT(CFSFolderEnumSTATSTG, IEnumSTATSTG), // IEnumSTATSTG
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{ 0 },
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};
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return QISearch(this, qit, riid, ppv);
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}
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// IEnumSTATSTG
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STDMETHODIMP CFSFolderEnumSTATSTG::Next(ULONG celt, STATSTG *rgelt, ULONG *pceltFetched)
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{
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HRESULT hr = S_FALSE; // assume end of the enum
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ASSERT(rgelt);
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ZeroMemory(rgelt, sizeof(STATSTG)); // per COM conventions
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if (pceltFetched)
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*pceltFetched = 0;
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WIN32_FIND_DATA fd;
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BOOL fFound = FALSE;
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BOOL fGotFD = FALSE;
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do
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{
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if (_cIndex == 0)
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{
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// this is the first file we look at.
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fGotFD = S_OK == SHFindFirstFile(_szSearch, &fd, &_hFindFile);
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}
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else
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{
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fGotFD = FindNextFile(_hFindFile, &fd);
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}
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_cIndex++;
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if (fGotFD)
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{
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ASSERT(fd.cFileName[0]);
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if (!PathIsDotOrDotDot(fd.cFileName))
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fFound = TRUE;
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}
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} while (fGotFD && !fFound);
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if (fFound)
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{
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hr = StatStgFromFindData(&fd, STATFLAG_DEFAULT, rgelt);
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if (SUCCEEDED(hr))
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{
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if (pceltFetched)
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*pceltFetched = 1;
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}
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}
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else if (_hFindFile != INVALID_HANDLE_VALUE)
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{
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// we'll be nice and close the handle as early as possible.
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FindClose(_hFindFile);
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_hFindFile = INVALID_HANDLE_VALUE;
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}
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return hr;
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}
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STDMETHODIMP CFSFolderEnumSTATSTG::Reset()
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{
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HRESULT hr = S_OK;
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_cIndex = 0;
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if (_hFindFile != INVALID_HANDLE_VALUE)
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{
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FindClose(_hFindFile);
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_hFindFile = INVALID_HANDLE_VALUE;
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}
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return hr;
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}
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