523 lines
19 KiB
C
523 lines
19 KiB
C
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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//
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// Copyright (C) Microsoft Corporation, 1997 - 1999
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//
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// File: filelist.h
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//
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//--------------------------------------------------------------------------
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#ifndef _INC_CSCVIEW_FILELIST_H
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#define _INC_CSCVIEW_FILELIST_H
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//////////////////////////////////////////////////////////////////////////////
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/* File: filelist.h
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Description: Simplifies the transmission of a list of share and
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associated file names between components of the CSC UI. See
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description further below for details.
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Classes:
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CscFilenameList
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CscFilenameList::HSHARE
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CscFilenameList::ShareIter
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CscFilenameList::FileIter
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Note: This module was written to be used by any part of the CSCUI,
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not just the viewer. Therefore, I don't assume that the
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new operator will throw an exception on allocation failures.
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I don't like all the added code to detect allocation failures
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but it's not reasonable to expect code in the other components
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to become exception-aware with respect to "new" failures.
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Revision History:
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Date Description Programmer
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-------- --------------------------------------------------- ----------
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11/28/97 Initial creation. BrianAu
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*/
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WINDOWS_
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# include <windows.h>
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#endif
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//
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// This set of classes is designed to transfer a list of network share
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// names and network file names between components of the CSC UI
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// (i.e. wizard, viewer, onestop etc). Data is transferred through
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// a formatted byte buffer that is essentially an opaque blob
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// to both the sender and receiver. The class CscFilenameList
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// was created to prevent the sender and receiver from having
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// to understand the buffer format. The buffer is formatted as follows:
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//
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// +----------------+---------------------------------+
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// | <namelist hdr> | <share descriptors> |
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// +----------------+---------------------------------+
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// | |
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// | |
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// | <share and file names> |
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// | |
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// | |
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// +--------------------------------------------------+
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//
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//
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// Where: <namelist hdr> is a single block of type CSC_NAMELIST_HDR.
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// This block describes the size of the buffer and the
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// share count.
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//
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// <share descriptors> is an array of type CSC_NAMELIST_SHARE_DESC,
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// one for each share in the buffer. Each share descriptor
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// describes the offset to the share name, the offset
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// to the first file name and the number of file names
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// in the buffer. All offsets are byte offsets from the
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// start of the buffer.
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//
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// <share and file names> is an array of TCHARs containing the
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// names of the shares and files stored in the buffer.
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// Each name string is nul-terminated.
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//
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//
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// The following outline describes how I see someone using this feature:
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//
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// 1. Instantiate a CscFilenameList object (no ctor arguments).
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// 2. Call AddShare() whenever a share is to be added.
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// 3. Call AddFile() whenever a file is to be added. Note that
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// saving the HSHARE returned by AddShare() can make file name addition
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// more efficient as it eliminates the need for an internal lookup
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// of the associated share name each time a file name is added.
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//
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// i.e.: CscFilenameList fnl;
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// HSHARE hShare = fnl.AddShare("\\\\server\\share");
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// fnl.AddFile(hShare, "foo.txt");
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// fnl.AddFile(hShare, "bar.txt");
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//
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// is more efficient than...
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//
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// CscFilenameList fnl;
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// fnl.AddFile("\\\\server\\share", "foo.txt");
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// fnl.AddFile("\\\\server\\share", "bar.txt");
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//
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// ...which is slightly more efficient than...
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//
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// CscFilenameList fnl;
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// fnl.AddFile("\\\\server\\share\\foo.txt");
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// fnl.AddFile("\\\\server\\share\\bar.txt");
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//
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// ...although all 3 methods are supported.
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//
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// 4. Once all shares and files are added, call CreateListBuffer() to retrieve
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// the information formatted in a byte buffer. The buffer is allocated
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// on the heap.
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// 5. Pass the buffer address to the desired program component.
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// 6. The receiving component instantiates a CscFilenameList object passing
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// the address of the buffer to the ctor. This initializes the namelist
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// so that it merely references the information in the buffer rather than
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// duplicating the name information in memory. Note that the buffer must
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// remain in memory while this namelist object is in use.
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// 7. The receiving component creates a Share Iterator by calling
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// CreateShareIterator(). The returned iterator enumerates each of the
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// shares contained in the namelist object.
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// 8. The receiving component enumerates the shares (receiving an HSHARE) for
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// each. To get a share's name string, call GetShareName() passing the
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// HSHARE for the desired share.
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// 9. For each share, the recieving component creates a File Iterator by
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// calling CreateFileIterator() passing the HSHARE for the desired share.
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// The returned iterator enumerates each of the file names associated
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// with the share.
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// 10. Once the operation is complete, FreeListBuffer is called to delete
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// the byte buffer created by CreateListBuffer().
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//
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//
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// The following example illustrates this process:
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//
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//
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// void Foo(void)
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// {
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// CscFilenameList fnl; // Namelist object.
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// CscFilenameList::HSHARE hShare; // Share handle.
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//
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// // Add a share and some files
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//
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// fnl.AddShare(TEXT("\\\\worf\\ntspecs"), &hShare);
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// fnl.AddFile(hShare, TEXT("foo.txt"));
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// fnl.AddFile(hShare, TEXT("bar.txt"));
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//
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// // Add another share and some files.
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//
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// fnl.AddShare(TEXT("\\\\msoffice\\products"), &hShare);
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// fnl.AddFile(hShare, TEXT("word.doc"));
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// fnl.AddFile(hShare, TEXT("excel.doc"));
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// fnl.AddFile(hShare, TEXT("powerpoint.doc"));
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// fnl.AddFile(hShare, TEXT("access.doc"));
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//
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// // Add another share and more files using the less-efficient
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// // method. It's valid, just less efficient.
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//
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// fnl.AddFile(TEXT("\\\\performance\\poor"), TEXT("turtle.doc"));
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// fnl.AddFile(TEXT("\\\\performance\\poor"), TEXT("snail.doc"));
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// fnl.AddFile(TEXT("\\\\performance\\poor"), TEXT("inchworm.doc"));
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//
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// // Create the byte buffer from the namelist and pass it to
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// // the receiving component.
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//
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// LPBYTE pbBuffer = fnl.CreateListBuffer();
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// Bar(pbBuffer);
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//
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// // Delete the byte buffer when we're done.
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//
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// FreeListBuffer(pbBuffer);
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// }
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//
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//
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// void Bar(LPBYTE pbBuffer)
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// {
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// // Create a new namelist object from the byte buffer.
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//
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// CscFileNameList fnl(pbBuffer);
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//
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// // Create a share iterator.
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//
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// CscFilenameList::ShareIter si = fnl.CreateShareIterator();
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// CscFilenameList::HSHARE hShare;
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//
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// // Iterate over the shares in the namelist collection.
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//
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// while(si.Next(&hShare))
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// {
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// _tprintf(TEXT("Share..: \"%s\"\n"), fnl.GetShareName(hShare));
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//
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// // Create a file iterator for the share.
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//
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// CscFilenameList::FileIter fi = fl.CreateFileIterator(hShare);
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// LPCTSTR pszFile;
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//
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// // Iterate over the filenames associated with the share.
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//
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// while(pszFile = fi.Next())
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// {
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// _tprintf(TEXT("\tFile..: \"%s\"\n"), pszFile);
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// }
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// }
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// }
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//
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// [brianau - 11/28/97]
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//
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//
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// Namelist byte buffer header block (offset 0).
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//
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typedef struct
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{
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DWORD cbSize;
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DWORD cShares;
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} CSC_NAMELIST_HDR, *PCSC_NAMELIST_HDR;
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//
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// Namelist byte buffer share descriptor block. Array (one per share)
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// starting at offset 12 (immediately following the header block).
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//
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typedef struct
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{
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DWORD cbOfsShareName;
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DWORD cbOfsFileNames;
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DWORD cFiles;
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} CSC_NAMELIST_SHARE_DESC, *PCSC_NAMELIST_SHARE_DESC;
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class CscFilenameList
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{
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private:
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class Share;
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public:
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class ShareIter;
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class FileIter;
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class HSHARE;
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// --------------------------------------------------------------------
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// CscFilenameList::HSHARE
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//
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// Share "handle" to communicate the identity of an internal "share"
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// object with the client without exposing the share object directly.
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// The client just knows an HSHARE. Clients get one as the return
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// value from AddShare().
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//
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class HSHARE
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{
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public:
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HSHARE(void);
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HSHARE(const HSHARE& rhs);
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HSHARE& operator = (const HSHARE& rhs);
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~HSHARE(void) { }
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bool operator ! ()
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{ return NULL == m_pShare; }
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private:
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//
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// Private so only we can create meaninful HSHARE objects.
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//
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HSHARE(Share *pShare)
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: m_pShare(pShare) { }
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Share *m_pShare; // ptr to the actual share object.
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friend class CscFilenameList;
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friend class ShareIter;
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};
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// --------------------------------------------------------------------
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// CscFilenameList::FileIter
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//
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// Iterator for enumerating each file name associated with a
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// particular share. Clients create one using CreateFileIterator().
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//
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class FileIter
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{
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public:
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FileIter(void);
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~FileIter(void) { }
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FileIter(const FileIter& rhs);
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FileIter& operator = (const FileIter& rhs);
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LPCTSTR Next(void);
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void Reset(void);
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private:
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FileIter(const Share *pShare);
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const Share *m_pShare; // ptr to associated share object.
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int m_iFile; // current file iteration index.
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friend class CscFilenameList;
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};
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// --------------------------------------------------------------------
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// CscFilenameList::ShareIter
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//
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// Iterator for enumerating each share in the namelist collection.
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// Clients create one using CreateShareIterator().
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//
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class ShareIter
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{
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public:
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ShareIter(void);
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ShareIter(const CscFilenameList& fnl);
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~ShareIter(void) { }
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ShareIter(const ShareIter& rhs);
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ShareIter& operator = (const ShareIter& rhs);
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bool Next(HSHARE *phShare);
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void Reset(void);
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private:
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const CscFilenameList *m_pfnl; // ptr to filename collection obj.
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int m_iShare; // current share iteration index.
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};
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// --------------------------------------------------------------------
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// Namelist object public interface.
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//
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// Create an empty namelist collection ready to accept share and
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// file names.
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//
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CscFilenameList(void);
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//
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// Create a namelist collection and initialize it with the contents
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// of a byte buffer created by CreateListBuffer().
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// If bCopy is false, the subsequent namelist object merely references
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// the data in the byte buffer rather than duplicating the namestrings
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// in memory. If bCopy is true, name strings are created as if the
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// names had been added using AddShare() and AddFile(). Note that
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// additional share and file name strings may be added at any time.
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// However, they are added to internal structures and not to the
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// byte buffer. Call CreateListBuffer() to add them to a new byte
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// buffer.
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//
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CscFilenameList(PCSC_NAMELIST_HDR pbNames, bool bCopy);
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~CscFilenameList(void);
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//
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// Add a share name to the collection. Does not create a
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// duplicate share entry if one already exists. Returns a handle
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// the a share object.
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//
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bool AddShare(LPCTSTR pszShare, HSHARE *phShare, bool bCopy = true);
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//
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// Add a file for a share. More efficient to use the first
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// version taking a share handle rather than a share name.
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//
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bool AddFile(HSHARE& hShare, LPCTSTR pszFile, bool bDirectory = false, bool bCopy = true);
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bool AddFile(LPCTSTR pszShare, LPCTSTR pszFile, bool bDirectory = false, bool bCopy = true);
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bool AddFile(LPCTSTR pszFullPath, bool bDirectory = false, bool bCopy = true);
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bool RemoveFile(HSHARE& hShare, LPCTSTR pszFile);
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bool RemoveFile(LPCTSTR pszShare, LPCTSTR pszFile);
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bool RemoveFile(LPCTSTR pszFullPath);
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//
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// Retrieve miscellaneous information about the collection.
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//
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int GetShareCount(void) const;
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int GetFileCount(void) const;
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LPCTSTR GetShareName(HSHARE& hShare) const;
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int GetShareFileCount(HSHARE& hShare) const;
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bool GetShareHandle(LPCTSTR pszShare, HSHARE *phShare) const;
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//
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// Determine if a given share or file exists in the collection.
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// For the FileExists() functions, if bExact is true (the default)
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// only exact character-for-character matches return true. If
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// bExact is false, the filename "\\server\share\dirA\dirB\foo.txt"
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// will match if any of the following four entries exist in the
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// namelist:
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//
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// "\\server\share\dirA\dirB\foo.txt" (exact match)
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// "\\server\share\*" (wildcard match)
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// "\\server\share\dirA\*" (wildcard match)
|
||
|
|
// "\\server\share\dirA\dirB\*" (wildcard match)
|
||
|
|
//
|
||
|
|
bool ShareExists(LPCTSTR pszShare) const;
|
||
|
|
bool FileExists(HSHARE& hShare, LPCTSTR pszFile, bool bExact = true) const;
|
||
|
|
bool FileExists(LPCTSTR pszShare, LPCTSTR pszFile, bool bExact = true) const;
|
||
|
|
bool FileExists(LPCTSTR pszFullPath, bool bExact = true) const;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Create iterators for enumerating collection contents.
|
||
|
|
//
|
||
|
|
ShareIter CreateShareIterator(void) const;
|
||
|
|
FileIter CreateFileIterator(HSHARE& hShare) const;
|
||
|
|
//
|
||
|
|
// Create/free a byte buffer containing the contents of the collection.
|
||
|
|
//
|
||
|
|
PCSC_NAMELIST_HDR CreateListBuffer(void) const;
|
||
|
|
static void FreeListBuffer(PCSC_NAMELIST_HDR pbNames);
|
||
|
|
//
|
||
|
|
// Check after initializing object from byte buffer.
|
||
|
|
//
|
||
|
|
bool IsValid(void) const
|
||
|
|
{ return m_bValid; }
|
||
|
|
|
||
|
|
#ifdef FILELIST_TEST
|
||
|
|
void Dump(void) const;
|
||
|
|
void DumpListBuffer(PCSC_NAMELIST_HDR pbBuffer) const;
|
||
|
|
#endif // FILELIST_TEST
|
||
|
|
|
||
|
|
|
||
|
|
private:
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
// CscFilenameList::NamePtr
|
||
|
|
//
|
||
|
|
// Simple wrapper around a string pointer to add a notion of "ownership".
|
||
|
|
// This lets us store a string address as either a pointer to dynamic
|
||
|
|
// heap memory (that later must be freed) or the address of a string
|
||
|
|
// in a character buffer owned by someone else (owner frees it if
|
||
|
|
// necessary).
|
||
|
|
//
|
||
|
|
class NamePtr
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
NamePtr(void)
|
||
|
|
: m_pszName(NULL),
|
||
|
|
m_bOwns(false) { }
|
||
|
|
|
||
|
|
NamePtr(LPCTSTR pszName, bool bCopy);
|
||
|
|
~NamePtr(void);
|
||
|
|
|
||
|
|
NamePtr(NamePtr& rhs);
|
||
|
|
NamePtr& operator = (NamePtr& rhs);
|
||
|
|
|
||
|
|
bool IsValid(void) const
|
||
|
|
{ return NULL != m_pszName; }
|
||
|
|
|
||
|
|
operator LPCTSTR () const
|
||
|
|
{ return m_pszName; }
|
||
|
|
|
||
|
|
private:
|
||
|
|
LPCTSTR m_pszName; // address of string.
|
||
|
|
bool m_bOwns; // do we need to free it on destruction?
|
||
|
|
|
||
|
|
friend class CscFilenameList;
|
||
|
|
friend class Share;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
// CscFilenameList::Share
|
||
|
|
//
|
||
|
|
// Represents a share in the namelist collection. It's really just
|
||
|
|
// a convenient container for a share name and a list of file names
|
||
|
|
// associated with the share.
|
||
|
|
//
|
||
|
|
class Share
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
Share(LPCTSTR pszShare, bool bCopy = true);
|
||
|
|
~Share(void);
|
||
|
|
|
||
|
|
bool AddFile(LPCTSTR pszFile, bool bDirectory = false, bool bCopy = true);
|
||
|
|
bool RemoveFile(LPCTSTR pszFile);
|
||
|
|
|
||
|
|
int FileCount(void) const
|
||
|
|
{ return m_cFiles; }
|
||
|
|
|
||
|
|
int ByteCount(void) const
|
||
|
|
{ return (m_cchShareName + m_cchFileNames) * sizeof(TCHAR); }
|
||
|
|
|
||
|
|
int Write(LPBYTE pbBufferStart,
|
||
|
|
CSC_NAMELIST_SHARE_DESC *pDesc,
|
||
|
|
LPTSTR pszBuffer,
|
||
|
|
int cchBuffer) const;
|
||
|
|
|
||
|
|
#ifdef FILELIST_TEST
|
||
|
|
void Dump(void) const;
|
||
|
|
#endif // FILELIST_TEST
|
||
|
|
|
||
|
|
private:
|
||
|
|
int m_cFiles; // Cnt of files in share.
|
||
|
|
int m_cAllocated; // Cnt of share ptrs allocated.
|
||
|
|
int m_cchShareName; // Bytes req'd to hold share name.
|
||
|
|
int m_cchFileNames; // Bytes req'd to hold file names.
|
||
|
|
NamePtr m_pszShareName; // Address of share name string.
|
||
|
|
NamePtr *m_rgpszFileNames; // Array of ptrs to file name strings
|
||
|
|
static int m_cGrow; // File name array growth increment.
|
||
|
|
|
||
|
|
int WriteFileNames(LPTSTR pszBuffer, int cchBuffer, DWORD *pcFilesWritten) const;
|
||
|
|
int WriteName(LPTSTR pszBuffer, int cchBuffer) const;
|
||
|
|
bool GrowFileNamePtrList(void);
|
||
|
|
|
||
|
|
friend class CscFilenameList;
|
||
|
|
friend class FileIter;
|
||
|
|
};
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
// Namelist object private members.
|
||
|
|
//
|
||
|
|
int m_cShares; // How many shares in collection.
|
||
|
|
int m_cAllocated; // Allocated size of m_rgpShares[].
|
||
|
|
Share **m_rgpShares; // Dynamic array of ptrs to Share objects.
|
||
|
|
bool m_bValid; // Ctor completion check.
|
||
|
|
static int m_cGrow; // How much to grow array when necessary.
|
||
|
|
|
||
|
|
//
|
||
|
|
// Prevent copy.
|
||
|
|
//
|
||
|
|
CscFilenameList(const CscFilenameList& rhs);
|
||
|
|
CscFilenameList& operator = (const CscFilenameList& rhs);
|
||
|
|
|
||
|
|
bool GrowSharePtrList(void);
|
||
|
|
bool LoadFromBuffer(PCSC_NAMELIST_HDR pbBuffer, bool bCopy);
|
||
|
|
|
||
|
|
void ParseFullPath(LPTSTR pszFullPath,
|
||
|
|
LPTSTR *ppszShare,
|
||
|
|
LPTSTR *ppszFile) const;
|
||
|
|
|
||
|
|
static bool Compare(LPCTSTR pszTemplate, LPCTSTR pszFile, bool *pbExact);
|
||
|
|
|
||
|
|
friend class ShareIter;
|
||
|
|
friend class Share;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // _INC_CSCVIEW_FILELIST_H
|
||
|
|
|