1 files changed, 86 insertions, 0 deletions
diff --git a/zen/file_traverser.h b/zen/file_traverser.h
new file mode 100644
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--- /dev/null
+++ b/zen/file_traverser.h
@@ -0,0 +1,86 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#ifndef FILETRAVERSER_H_INCLUDED
+#define FILETRAVERSER_H_INCLUDED
+
+#include "zstring.h"
+#include "type_tools.h"
+#include "int64.h"
+
+//advanced file traverser returning metadata and hierarchical information on files and directories
+
+namespace zen
+{
+class TraverseCallback
+{
+public:
+    virtual ~TraverseCallback() {}
+
+    struct FileInfo
+    {
+        UInt64 fileSize;        //unit: bytes!
+        Int64 lastWriteTimeRaw; //number of seconds since Jan. 1st 1970 UTC
+    };
+
+    struct SymlinkInfo
+    {
+        Int64 lastWriteTimeRaw; //number of seconds since Jan. 1st 1970 UTC
+        Zstring    targetPath;  //may be empty if something goes wrong
+        bool dirLink;           //"true": point to dir; "false": point to file (or broken Link on Linux)
+    };
+
+    struct ReturnValDir
+    {
+        enum ReturnValueEnh
+        {
+            TRAVERSING_DIR_IGNORE,
+            TRAVERSING_DIR_CONTINUE
+        };
+
+        ReturnValDir(Int2Type<TRAVERSING_DIR_IGNORE>) : returnCode(TRAVERSING_DIR_IGNORE), subDirCb(NULL) {}
+        ReturnValDir(Int2Type<TRAVERSING_DIR_CONTINUE>, TraverseCallback& subDirCallback) : returnCode(TRAVERSING_DIR_CONTINUE), subDirCb(&subDirCallback) {}
+
+        ReturnValueEnh returnCode;
+        TraverseCallback* subDirCb;
+    };
+
+    enum HandleError
+    {
+        TRAV_ERROR_RETRY,
+        TRAV_ERROR_IGNORE
+    };
+
+    //overwrite these virtual methods
+    virtual void         onFile   (const Zchar* shortName, const Zstring& fullName, const FileInfo&    details) = 0;
+    virtual void         onSymlink(const Zchar* shortName, const Zstring& fullName, const SymlinkInfo& details) = 0;
+    virtual ReturnValDir onDir    (const Zchar* shortName, const Zstring& fullName) = 0;
+    virtual HandleError  onError  (const std::wstring& errorText) = 0;
+};
+
+
+#ifdef FFS_WIN
+struct DstHackCallback
+{
+    virtual ~DstHackCallback() {}
+    virtual void requestUiRefresh(const Zstring& filename) = 0; //applying DST hack imposes significant one-time performance drawback => callback to inform user
+};
+#else
+struct DstHackCallback; //DST hack not required on Linux
+#endif
+
+//custom traverser with detail information about files
+//directory may end with PATH_SEPARATOR
+void traverseFolder(const Zstring& directory, //throw();
+                    bool followSymlinks,
+                    TraverseCallback& sink,
+                    DstHackCallback* dstCallback = NULL); //apply DST hack if callback is supplied
+//followSymlinks:
+//"true":  Symlinks dereferenced and reported via onFile() and onDir() => onSymlink not used!
+//"false": Symlinks directly reported via onSymlink(), directory symlinks are not followed
+}
+
+#endif // FILETRAVERSER_H_INCLUDED