Source code of Windows XP (NT5)
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//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\
//
// chanenum.h
//
// The definition of the channel enumerator.
//
// History:
//
// 8/6/97 edwardp Created.
//
////////////////////////////////////////////////////////////////////////////////
//
// Check for previous includes of this file.
//
#ifndef _CHANENUM_H_
#define _CHANENUM_H_
/*
//
// Defines
//
#define TSTR_CHANNEL_KEY TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Channels")
//
// Helper functions.
//
HKEY Reg_GetChannelKey(void);
HRESULT Reg_WriteChannel(LPCTSTR pszPath,LPCTSTR pszURL);
HRESULT Reg_RemoveChannel(LPCTSTR pszPath);
*/
//
// Structures.
//
typedef struct _tagSTACKENTRY
{
LPTSTR pszPath;
_tagSTACKENTRY* pNext;
} STACKENTRY;
typedef enum _tagINIVALUE
{
INI_GUID = 0,
INI_URL = 1
} INIVALUE;
//
// Class definition for the channel enumerator class.
//
class CChannelEnum : public IEnumChannels
{
//
// Methods
//
public:
// Constructor
CChannelEnum(DWORD dwEnumFlags, LPCWSTR pszURL);
// IUnknown
STDMETHODIMP QueryInterface(REFIID, void **);
STDMETHODIMP_(ULONG) AddRef(void);
STDMETHODIMP_(ULONG) Release(void);
// IEnumIDList
STDMETHODIMP Next(ULONG celt, CHANNELENUMINFO* rgInfo, ULONG *pceltFetched);
STDMETHODIMP Skip(ULONG celt);
STDMETHODIMP Reset(void);
STDMETHODIMP Clone(IEnumChannels **ppenum);
private:
// Destructor
~CChannelEnum(void);
// Helper methods
inline BOOL DirectoryStack_IsEmpty(void);
void DirectoryStack_FreeEntry(STACKENTRY* pse);
void DirectoryStack_FreeStack(void);
STACKENTRY* DirectoryStack_Pop(void);
BOOL DirectoryStack_Push(LPCTSTR pszPath);
BOOL DirectoryStack_InitFromFlags(DWORD dwEnumFlags);
BOOL DirectoryStack_PushSubdirectories(LPCTSTR pszPath);
BOOL FindNextChannel(CHANNELENUMINFO* pInfo);
BOOL ReadChannelInfo(LPCTSTR pszPath, CHANNELENUMINFO* pInfo);
BOOL ContainsChannelDesktopIni(LPCTSTR pszPath);
BOOL URLMatchesIni(LPCTSTR pszPath, LPCTSTR pszURL);
BOOL ReadFromIni(LPCTSTR pszPath, LPTSTR pszOut, int cch, INIVALUE iv);
LPOLESTR OleAllocString(LPCTSTR psz);
SUBSCRIPTIONSTATE GetSubscriptionState(LPCTSTR pszURL);
//
// Member variables.
//
private:
ULONG m_cRef;
STACKENTRY* m_pseDirectoryStack;
LPTSTR m_pszURL;
DWORD m_dwEnumFlags;
};
#endif // _CHANENUM_H_