(Unicode C++) Iterate over Files and Directories in Filesystem Directory Tree

Demonstrates how to use the Chilkat DirTree object/class to iterate over the names of files and sub-directories in a directory tree.

This example iterates over a directory tree that contains these files and sub-directories:

a
    images (sub-directory)
        dudeA.gif
        Thumbs.db
    hamlet.xml
    pigs.xml
    Setup.exe
b
    yyy (sub-directory)
    zzz (sub-directory)
        HelloWorld123.txt
        test123.txt
    dude.gif
    dudeC.gif
    hello.txt
    Thumbs.db
test123.txt

(sub-directory)
Relative Path: a
Absolute Path: c:\temp\abc123\a
Absolute UNC Path: \\?\c:\temp\abc123\a
----
(sub-directory)
Relative Path: b
Absolute Path: c:\temp\abc123\b
Absolute UNC Path: \\?\c:\temp\abc123\b
----
Size in bytes: 15
Relative Path: test123.txt
Absolute Path: c:\temp\abc123\test123.txt
Absolute UNC Path: \\?\c:\temp\abc123\test123.txt
----
Size in bytes: 279658
Relative Path: a\hamlet.xml
Absolute Path: c:\temp\abc123\a\hamlet.xml
Absolute UNC Path: \\?\c:\temp\abc123\a\hamlet.xml
----
(sub-directory)
Relative Path: a\images
Absolute Path: c:\temp\abc123\a\images
Absolute UNC Path: \\?\c:\temp\abc123\a\images
----
Size in bytes: 8463
Relative Path: a\pigs.xml
Absolute Path: c:\temp\abc123\a\pigs.xml
Absolute UNC Path: \\?\c:\temp\abc123\a\pigs.xml
----
Size in bytes: 24576
Relative Path: a\Setup.exe
Absolute Path: c:\temp\abc123\a\Setup.exe
Absolute UNC Path: \\?\c:\temp\abc123\a\Setup.exe
----
Size in bytes: 6221
Relative Path: b\dude.gif
Absolute Path: c:\temp\abc123\b\dude.gif
Absolute UNC Path: \\?\c:\temp\abc123\b\dude.gif
----
Size in bytes: 6221
Relative Path: b\dudeC.gif
Absolute Path: c:\temp\abc123\b\dudeC.gif
Absolute UNC Path: \\?\c:\temp\abc123\b\dudeC.gif
----
Size in bytes: 13
Relative Path: b\hello.txt
Absolute Path: c:\temp\abc123\b\hello.txt
Absolute UNC Path: \\?\c:\temp\abc123\b\hello.txt
----
Size in bytes: 10240
Relative Path: b\Thumbs.db
Absolute Path: c:\temp\abc123\b\Thumbs.db
Absolute UNC Path: \\?\c:\temp\abc123\b\Thumbs.db
----
(sub-directory)
Relative Path: b\yyy
Absolute Path: c:\temp\abc123\b\yyy
Absolute UNC Path: \\?\c:\temp\abc123\b\yyy
----
(sub-directory)
Relative Path: b\zzz
Absolute Path: c:\temp\abc123\b\zzz
Absolute UNC Path: \\?\c:\temp\abc123\b\zzz
----
Size in bytes: 6221
Relative Path: a\images\dudeA.gif
Absolute Path: c:\temp\abc123\a\images\dudeA.gif
Absolute UNC Path: \\?\c:\temp\abc123\a\images\dudeA.gif
----
Size in bytes: 6144
Relative Path: a\images\Thumbs.db
Absolute Path: c:\temp\abc123\a\images\Thumbs.db
Absolute UNC Path: \\?\c:\temp\abc123\a\images\Thumbs.db
----
Size in bytes: 6080
Relative Path: b\zzz\HelloWorld123.txt
Absolute Path: c:\temp\abc123\b\zzz\HelloWorld123.txt
Absolute UNC Path: \\?\c:\temp\abc123\b\zzz\HelloWorld123.txt
----
Size in bytes: 15
Relative Path: b\zzz\test123.txt
Absolute Path: c:\temp\abc123\b\zzz\test123.txt
Absolute UNC Path: \\?\c:\temp\abc123\b\zzz\test123.txt
----

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#include <CkDirTreeW.h>

void ChilkatSample(void)
    {
    CkDirTreeW dirTree;

    // Specify the root of the directory tree to be traversed.
    dirTree.put_BaseDir(L"c:/temp/abc123");

    // Indicate that we want to recursively traverse the tree.
    dirTree.put_Recurse(true);

    bool success;

    // Begin the directory tree traversal.
    success = dirTree.BeginIterate();
    if (success != true) {
        wprintf(L"%s\n",dirTree.lastErrorText());
        return;
    }

    bool doneIterating = dirTree.get_DoneIterating();
    while (doneIterating != true) {

        // Examine the file or directory at the current traversal position:
        if (dirTree.get_IsDirectory() == true) {
            wprintf(L"(sub-directory)\n");
        }
        else {
            wprintf(L"Size in bytes: %d\n",dirTree.get_FileSize32());
            // If the file size is larger than 2GB, then get the size as a decimal string.
            // (Chilkat provides a FileSize64 method in *some* programming languages. The FileSizeStr property is added in Chilkat v9.5.0.88)
            wprintf(L"Size in bytes: %s\n",dirTree.fileSizeStr());
        }

        wprintf(L"Relative Path: %s\n",dirTree.relativePath());
        wprintf(L"Absolute Path: %s\n",dirTree.fullPath());
        wprintf(L"Absolute UNC Path: %s\n",dirTree.fullUncPath());
        wprintf(L"----\n");

        // Advance to the next file or sub-directory in the tree traversal.
        success = dirTree.AdvancePosition();
        if (success != true) {
            if (dirTree.get_DoneIterating() != true) {
                wprintf(L"%s\n",dirTree.lastErrorText());
                return;
            }

        }

        doneIterating = dirTree.get_DoneIterating();
    }
    }