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777 lines
21 KiB
777 lines
21 KiB
#define MAX_DRIVES 64
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BOOL
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EnumerateAllDrivesT (
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IN FILEENUMPROCT fnEnumCallback,
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IN FILEENUMFAILPROCT fnFailCallback,
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IN DWORD EnumID,
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IN LPVOID pParam,
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IN PEXCLUDEINFT ExcludeInfStruct,
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IN DWORD AttributeFilter
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)
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/*++
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Routine Description:
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EnumerateAllDrives first builds an exclusion list if an exclusion INF path
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is provided, and then enumerates every file on every drive that is not
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excluded. The callback function is called once per file. The pParam
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parameter is passed to the callback.
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Arguments:
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fnEnumCallback - A pointer to your callback function
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EnumID - A caller-defined value used to identify the exclusion list
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pParam - LPVOID passed to callback function
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ExcludeInfStruct - Struct containing INF file information for excluding dirs or files
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AttributeFilter - FILTER_xxx constants
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Return Value:
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TRUE if function succeeds. Call GetLastError for error code if return
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value is FALSE.
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--*/
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{
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TCHAR LogicalDrives[MAX_DRIVES];
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DWORD rc;
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PCTSTR p;
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UINT driveType;
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rc = GetLogicalDriveStrings (
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MAX_DRIVES,
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LogicalDrives
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);
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if (!rc || rc > MAX_DRIVES) {
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if (rc)
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SetLastError (ERROR_OUTOFMEMORY);
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return FALSE;
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}
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for (p = LogicalDrives ; *p ; p = GetEndOfString (p) + 1) {
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driveType = GetDriveType(p);
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if (driveType == DRIVE_REMOTE || driveType == DRIVE_CDROM) {
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continue;
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}
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if (!EnumerateTreeT (p,
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fnEnumCallback,
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fnFailCallback,
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EnumID,
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pParam,
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ENUM_ALL_LEVELS,
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ExcludeInfStruct,
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AttributeFilter
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))
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break;
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}
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return (*p == 0);
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}
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BOOL
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EnumerateTreeT (
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IN PCTSTR EnumRoot,
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IN FILEENUMPROCT fnEnumCallback,
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IN FILEENUMFAILPROCT fnFailCallback, OPTIONAL
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IN DWORD EnumID,
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IN LPVOID pParam,
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IN DWORD Levels,
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IN PEXCLUDEINFT ExcludeInfStruct, OPTIONAL
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IN DWORD AttributeFilter
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)
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/*++
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Routine Description:
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EnumerateTree is similar to EnumerateAllDrives, except it allows you to
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enumerate a specific drive, or a specific subdir on a drive. Supply the
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drive letter and optional subdirectory in EnumRoot. Before enumerating,
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EnumerateTree will first build an exclusion list if an exclusion INF path
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is provided. Then every file below EnumRoot is enumerated, and the
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callback is called once per file, passing pParam unchanged.
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Arguments:
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EnumRoot - Drive and optional path to enumerate
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fnEnumCallback - A pointer to your callback function
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fnFailCallback - A pointer to optional fn that logs enumeration errors
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EnumID - A caller-defined value used to identify the exclusion list
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pParam - LPVOID passed to callback function
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ExcludeInfStruct - Struct containing INF file information for excluding dirs or files
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AttributeFilter - FILTER_xxx constants
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Return Value:
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TRUE if function succeeds. Call GetLastError for error code if return
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value is FALSE.
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--*/
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{
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ENUMSTRUCTT es;
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BOOL b;
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if (ExcludeInfStruct)
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if (!BuildExclusionsFromInfT (
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EnumID,
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ExcludeInfStruct
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)) {
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DEBUGMSG ((DBG_ERROR, "Error in exclusion file"));
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return FALSE;
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}
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es.fnEnumCallback = fnEnumCallback;
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es.fnFailCallback = fnFailCallback;
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es.EnumID = EnumID;
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es.pParam = pParam;
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es.Levels = Levels;
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es.CurrentLevel = 1;
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es.AttributeFilter = AttributeFilter;
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if (!IsPathLengthOk(EnumRoot))
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{
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if (NULL != fnFailCallback)
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{
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fnFailCallback(EnumRoot);
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return TRUE;
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}
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}
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if (IsPathExcludedT (EnumID, EnumRoot))
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return TRUE;
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b = EnumTreeEngineT (EnumRoot, &es);
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return b;
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}
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BOOL
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EnumTreeEngineT (
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PCTSTR CurrentPath,
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PENUMSTRUCTT pes
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)
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{
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WIN32_FIND_DATA fd; // A find struct for this subdir
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HANDLE hFind; // A find handle for this subdir
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PTSTR FullFilePath; // Buffer used to build file path
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static TCHAR FindPattern[MAX_TCHAR_PATH * 2]; // Temp buffer used to build pattern
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BYTE byBitmask[MAX_PATH]; // Bitmask is used to speed exclusion lookup
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static DWORD Attrib; // Temp attribute storage for filter processing
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static INT rc; // Callback return value
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DWORD PrevLevelCt; // Storage for parent's max depth setting
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BOOL RecurseStatus;
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DWORD CurrentDirData = 0;
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//
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// Do nothing when CurrentPath is at the size limit.
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//
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if (!IsPathLengthOk(CurrentPath))
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{
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if (NULL != pes->fnFailCallback)
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{
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pes->fnFailCallback(CurrentPath);
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}
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return TRUE;
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}
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PrevLevelCt = pes->Levels;
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StringCopy (FindPattern, CurrentPath);
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//
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// Create a bitmask that tells us when subdirectories match partial
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// file patterns.
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//
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ZeroMemory (byBitmask, sizeof (byBitmask));
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CreateBitmaskT (pes->EnumID, FindPattern, byBitmask);
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AppendPathWack (FindPattern);
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StringCat (FindPattern, TEXT("*"));
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hFind = FindFirstFile (FindPattern, &fd);
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if (hFind != INVALID_HANDLE_VALUE) {
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do {
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FullFilePath = JoinPaths (CurrentPath, fd.cFileName);
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__try {
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//
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// Ignore this path if FullFilePath is too long
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// this way fd.cFileName will surely be within limits (since it's shorter)
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//
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if (!IsPathLengthOk (FullFilePath)) {
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if (NULL != pes->fnFailCallback) {
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pes->fnFailCallback(FullFilePath);
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}
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continue;
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}
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// Filter directories named ".", "..". Set Attrib symbol.
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if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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if (!StringCompare (fd.cFileName, TEXT(".")) ||
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!StringCompare (fd.cFileName, TEXT("..")))
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continue;
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Attrib = FILTER_DIRECTORIES;
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} else {
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Attrib = FILTER_FILES;
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}
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// Call the callback
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if (Attrib & pes->AttributeFilter) {
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rc = CALLBACK_CONTINUE;
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switch (Attrib) {
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case FILTER_DIRECTORIES:
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// Ignore excluded paths
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if (IsPathExcludedT (pes->EnumID, FullFilePath)) {
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break;
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}
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// Callback for 'directory first'
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if (!(pes->AttributeFilter & FILTER_DIRS_LAST)) {
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rc = pes->fnEnumCallback (
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FullFilePath,
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NULL,
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&fd,
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pes->EnumID,
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pes->pParam,
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&CurrentDirData
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);
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}
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if (rc >= CALLBACK_CONTINUE && pes->CurrentLevel != pes -> Levels) {
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// Recurse on directory
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pes->CurrentLevel++;
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RecurseStatus = EnumTreeEngineT (FullFilePath, pes);
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pes->CurrentLevel--;
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if (!RecurseStatus) {
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PushError();
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FindClose(hFind);
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PopError();
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return FALSE;
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}
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}
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// Callback for 'directory last'
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if (pes->AttributeFilter & FILTER_DIRS_LAST) {
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rc = pes->fnEnumCallback (
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FullFilePath,
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NULL,
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&fd,
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pes->EnumID,
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pes->pParam,
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&CurrentDirData
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);
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}
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break;
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case FILTER_FILES:
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if (!IsFileExcludedT (pes->EnumID, FullFilePath, byBitmask)) {
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rc = pes->fnEnumCallback (FullFilePath,
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NULL,
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&fd,
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pes->EnumID,
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pes->pParam,
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&CurrentDirData
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);
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}
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break;
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}
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if (rc == CALLBACK_FAILED) {
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PushError();
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FindClose (hFind);
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PopError();
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return FALSE;
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}
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else if (rc == CALLBACK_SUBDIR_DONE) {
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break;
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}
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else if (rc > 0) {
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pes->Levels = pes->CurrentLevel + rc;
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}
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}
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else if (Attrib == FILTER_DIRECTORIES && !IsPathExcludedT (pes->EnumID, FullFilePath)) {
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// Recurse on directory.
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if (pes->CurrentLevel != pes -> Levels) {
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pes->CurrentLevel++;
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RecurseStatus = EnumTreeEngineT (FullFilePath, pes);
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pes->CurrentLevel--;
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if (!RecurseStatus) {
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PushError();
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FindClose(hFind);
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PopError();
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return FALSE;
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}
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}
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}
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}
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__finally {
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FreePathString (FullFilePath);
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}
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} while (FindNextFile (hFind, &fd));
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FindClose (hFind);
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//
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// Test error code returned from FindNextFile
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//
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if (GetLastError() != ERROR_NO_MORE_FILES && GetLastError() != ERROR_SUCCESS)
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{
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//
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// Caller to handle not-ready message
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//
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if (GetLastError() != ERROR_NOT_READY)
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{
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DEBUGMSG((DBG_ERROR,
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"EnumTreeEngineT: Error from FindNextFile.\n"
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" FindPattern: %s\n"
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" Error: %u (%x)",
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FindPattern,
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GetLastError(),GetLastError()));
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}
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return FALSE;
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}
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SetLastError(ERROR_SUCCESS);
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}
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else {
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//
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// Test return codes from FindFirstFile
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//
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if (GetLastError () != ERROR_NO_MORE_FILES)
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{
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//
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// Caller to handle not-ready message
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//
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if (GetLastError() != ERROR_NOT_READY)
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{
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DEBUGMSG((DBG_WARNING,
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"EnumTreeEngineT: Warning from FindFirstFile.\n"
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" FindPattern: %s\n",
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FindPattern));
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}
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// return FALSE;
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}
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SetLastError (ERROR_SUCCESS);
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}
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// If a callback returned a positive, non-zero number, the depth
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// of the subdirectory search was limited for this level. Now that
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// this level is done, we must restore the depth value of our parent.
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pes->Levels = PrevLevelCt;
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return TRUE;
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}
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/*++
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A bitmask is used in IsFileExcluded for faster relative directory searches.
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Instead of looking in the MemDb for each part of the path, IsFileExcluded
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skips segments that are known not to match. We create the bitmask here
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by looking up each portion of FindPattern. Bit 1 is set if the last
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subdirectory exists in the file exclusion list, Bit 2 is set if the last
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two subdirectories exist in the file exclusion list, and so on.
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For example, assume FindPattern is set to C:\DEV\FOO\BAR. CreateBitmask
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first looks in the memory database for BAR\*, and if it is found bit 1 is set.
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Then CreateBitmask looks in the memory database for FOO\BAR\*, and sets bit
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2. Again the function looks up DEV\FOO\BAR\* for bit 3 and finally
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C:\DEV\FOO\BAR\* for bit 4.
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Bit 0 is always set (empty paths always match).
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Once this bitmask is set up, IsFileExcluded can test only the patterns that
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are known to exist.
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--*/
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void
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CreateBitmaskT (
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DWORD EnumID,
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PCTSTR FindPattern,
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BYTE byBitmask[]
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)
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{
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TCHAR EnumPath[MAX_TCHAR_PATH * 2];
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TCHAR ShortPath[MAX_TCHAR_PATH * 2];
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PCTSTR p;
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PTSTR End;
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int nByte;
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int nBitVal;
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// Always set bit 0
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byBitmask[0] |= 1;
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// Build full file spec
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wsprintf (
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EnumPath,
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TEXT("%s\\%X\\%s\\"),
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MEMDB_CATEGORY_FILEENUM,
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EnumID,
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MEMDB_FIELD_FE_FILES
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);
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End = GetEndOfString (EnumPath);
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StringCopy (End, FindPattern);
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AppendPathWack (End);
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StringCat (End, TEXT("*"));
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// Start with last subdirectory, and build mask in reverse
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p = _tcsrchr (EnumPath, TEXT('\\'));
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nByte = 0;
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nBitVal = 2;
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do {
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// Move back to previous backslash
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for (p = _tcsdec (EnumPath, p) ;
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p >= End && *p != TEXT('\\') ;
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p = _tcsdec (EnumPath, p))
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{
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}
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// Check if partial file is in the tree
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wsprintf (
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ShortPath,
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TEXT("%s\\%X\\%s%s"),
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MEMDB_CATEGORY_FILEENUM,
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EnumID,
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MEMDB_FIELD_FE_FILES,
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p
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);
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if (MemDbGetPatternValueWithPattern (ShortPath, NULL))
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byBitmask[nByte] |= nBitVal;
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// Inc bit pos
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nBitVal *= 2;
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if (nBitVal == 256) {
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nBitVal = 1;
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nByte++;
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}
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} while (p > End);
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}
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BOOL
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IsPathExcludedT (DWORD EnumID, PCTSTR Path)
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{
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TCHAR EnumPath[MAX_TCHAR_PATH * 2];
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TCHAR ShortPath[MAX_TCHAR_PATH * 2];
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PCTSTR p;
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PTSTR End;
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// Try full paths
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wsprintf (
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EnumPath,
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TEXT("%s\\%X\\%s\\"),
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MEMDB_CATEGORY_FILEENUM,
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EnumID,
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MEMDB_FIELD_FE_PATHS
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);
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End = GetEndOfString (EnumPath);
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p = _tcsappend (End, Path);
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if (MemDbGetPatternValue (EnumPath, NULL)) {
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return TRUE;
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}
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// Try partial paths
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do {
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// Move back to previous backslash
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for (p = _tcsdec (EnumPath, p) ;
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p > End && (*p != TEXT('\\')) ;
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p = _tcsdec (EnumPath, p))
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{
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}
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// Check if partial path is in the tree
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if (p > End && p[1]) {
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wsprintf (
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ShortPath,
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TEXT("%s\\%X\\%s%s"),
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MEMDB_CATEGORY_FILEENUM,
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EnumID,
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MEMDB_FIELD_FE_PATHS,
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p
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);
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if (MemDbGetPatternValue (ShortPath, NULL)) {
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return TRUE;
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}
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}
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} while (p > End);
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return FALSE;
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}
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|
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BOOL
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IsFileExcludedT (DWORD EnumID, PCTSTR File, BYTE byBitmask[])
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{
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TCHAR EnumPath[MAX_TCHAR_PATH * 2];
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TCHAR ShortPath[MAX_TCHAR_PATH * 2];
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PCTSTR p;
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PTSTR End;
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int nByte;
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int nBit;
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// Build full file spec
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wsprintf (
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EnumPath,
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TEXT("%s\\%X\\%s\\"),
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MEMDB_CATEGORY_FILEENUM,
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EnumID,
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MEMDB_FIELD_FE_FILES
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);
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End = GetEndOfString (EnumPath);
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p = _tcsappend (End, File);
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//
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// Try partial file specs until full spec is reached
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//
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nByte = 0;
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nBit = 1;
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do {
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//
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// Move back to previous backslash in path
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// (p starts at NULL of EnumPath, End is in the middle of EnumPath)
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//
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for (p = _tcsdec (EnumPath, p) ;
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p >= End && (*p != TEXT('\\')) ;
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p = _tcsdec (EnumPath, p))
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{
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}
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// Bitmask is used to make sure slightly expensive query is necessary
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if (byBitmask[nByte] & nBit) {
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//
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// Check if partial file is in the tree
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//
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wsprintf (
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ShortPath,
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TEXT("%s\\%X\\%s%s"),
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MEMDB_CATEGORY_FILEENUM,
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EnumID,
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MEMDB_FIELD_FE_FILES,
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p
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);
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if (MemDbGetPatternValue (ShortPath, NULL)) {
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return TRUE;
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}
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}
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nBit *= 2;
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if (nBit == 256) {
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nBit = 1;
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nByte++;
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}
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} while (p > End);
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return FALSE;
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}
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|
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//
|
|
// ClearExclusions removes all enumaration exclusions. It is called
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|
// automatically at the end of enumeration when an exclusion INF file is
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|
// used. Use it when you need to programmatically build an exclusion list
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|
// with ExcludeDrive, ExcludePath, and ExcludeFile.
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|
//
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|
// You can combine programmatic exclusions with an exclusion INF file, but
|
|
// beware that the programmatic exclusions will be cleared after
|
|
// EnumarteAllDrives or EnumerateTree completes.
|
|
//
|
|
// If you do not use an INF, the programmatic exclusions will not
|
|
// automatically be cleared.
|
|
//
|
|
// EnumID - Caller-defined value to identify enumeration exclusion list
|
|
//
|
|
|
|
VOID
|
|
ClearExclusionsT (
|
|
DWORD EnumID
|
|
)
|
|
{
|
|
TCHAR EnumPath[MAX_TCHAR_PATH * 2];
|
|
|
|
wsprintf (EnumPath, TEXT("%s\\%X"), MEMDB_CATEGORY_FILEENUM, EnumID);
|
|
|
|
MemDbDeleteTree (EnumPath);
|
|
}
|
|
|
|
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
ExcludePath adds a path name to the exclusion list. There are two
|
|
cases:
|
|
|
|
1. A full path spec is supplied, including the drive letter or
|
|
UNC double-backslash.
|
|
2. The path does not start with a drive letter and is a portion of
|
|
a full path.
|
|
|
|
The dot and double-dot directories are not supported. Any part of
|
|
the path may contain wildcard characters, but a wildcard can not
|
|
be used in place of a backslash.
|
|
|
|
Arguments:
|
|
|
|
EnumID - A caller-defined value that identifies the exclusion list
|
|
Path - The path specification as described above
|
|
|
|
Return Value:
|
|
|
|
none
|
|
|
|
--*/
|
|
|
|
VOID
|
|
ExcludePathT (
|
|
IN DWORD EnumID,
|
|
IN PCTSTR Path
|
|
)
|
|
|
|
{
|
|
TCHAR EnumPath[MAX_TCHAR_PATH * 2];
|
|
|
|
wsprintf (
|
|
EnumPath,
|
|
TEXT("%s\\%X\\%s\\%s"),
|
|
MEMDB_CATEGORY_FILEENUM,
|
|
EnumID,
|
|
MEMDB_FIELD_FE_PATHS,
|
|
Path
|
|
);
|
|
|
|
MemDbSetValue (EnumPath, 0);
|
|
}
|
|
|
|
|
|
/*++
|
|
|
|
Routine Description:
|
|
|
|
ExcludeFile adds a file spec to the exclusion list. There are two
|
|
cases:
|
|
|
|
1. A full path spec is supplied, including the drive letter or
|
|
UNC double-backslash.
|
|
2. The path does not start with a drive letter and is a portion of
|
|
a full path.
|
|
|
|
The dot and double-dot directories are not supported. Any part of
|
|
the path may contain wildcard characters, but a wildcard can not
|
|
be used in place of a backslash.
|
|
|
|
Arguments:
|
|
|
|
EnumID - A caller-defined value that identifies the exclusion list
|
|
File - The file specification as described above
|
|
|
|
Return Value:
|
|
|
|
none
|
|
|
|
--*/
|
|
|
|
VOID
|
|
ExcludeFileT (
|
|
IN DWORD EnumID,
|
|
IN PCTSTR File
|
|
)
|
|
|
|
{
|
|
TCHAR EnumPath[MAX_TCHAR_PATH * 2];
|
|
|
|
wsprintf (
|
|
EnumPath,
|
|
TEXT("%s\\%X\\%s\\%s"),
|
|
MEMDB_CATEGORY_FILEENUM,
|
|
EnumID,
|
|
MEMDB_FIELD_FE_FILES,
|
|
File
|
|
);
|
|
|
|
MemDbSetValue (EnumPath, 0);
|
|
}
|
|
|
|
|
|
|
|
BOOL
|
|
BuildExclusionsFromInfT (DWORD EnumID,
|
|
PEXCLUDEINFT ExcludeInfStruct)
|
|
{
|
|
HINF hInf;
|
|
INFCONTEXT ic;
|
|
TCHAR Exclude[MAX_TCHAR_PATH * 2];
|
|
|
|
// Attempt to open
|
|
hInf = SetupOpenInfFile (ExcludeInfStruct->ExclusionInfPath, NULL, INF_STYLE_WIN4, NULL);
|
|
if (hInf == INVALID_HANDLE_VALUE)
|
|
return FALSE;
|
|
|
|
// Read in path exclusions
|
|
if (ExcludeInfStruct->PathSection) {
|
|
if (SetupFindFirstLine (hInf, ExcludeInfStruct->PathSection, NULL, &ic)) {
|
|
do {
|
|
if (SetupGetStringField (&ic, 1, Exclude, MAX_TCHAR_PATH, NULL)) {
|
|
ExcludePathT (EnumID, Exclude);
|
|
}
|
|
} while (SetupFindNextLine (&ic, &ic));
|
|
}
|
|
}
|
|
|
|
// Read in file exclusions
|
|
if (ExcludeInfStruct->FileSection) {
|
|
if (SetupFindFirstLine (hInf, ExcludeInfStruct->FileSection, NULL, &ic)) {
|
|
do {
|
|
if (SetupGetStringField (&ic, 1, Exclude, MAX_TCHAR_PATH, NULL)) {
|
|
ExcludeFileT (EnumID, Exclude);
|
|
}
|
|
} while (SetupFindNextLine (&ic, &ic));
|
|
}
|
|
}
|
|
|
|
// Clean up
|
|
SetupCloseInfFile (hInf);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|