Merge with lindenlab/viewer-development

1 files changed, 26 insertions, 2 deletions

diff --git a/indra/llvfs/lldir.h b/indra/llvfs/lldir.h
index 4f63c04aab..42996fd051 100644
--- a/indra/llvfs/lldir.h
+++ b/indra/llvfs/lldir.h
@@ -74,8 +74,32 @@ class LLDir
 
 // pure virtual functions
 	virtual U32 countFilesInDir(const std::string &dirname, const std::string &mask) = 0;
-	virtual BOOL getNextFileInDir(const std::string &dirname, const std::string &mask, std::string &fname, BOOL wrap) = 0;
-	virtual void getRandomFileInDir(const std::string &dirname, const std::string &mask, std::string &fname) = 0;
+
+    /// Walk the files in a directory, with file pattern matching
+	virtual BOOL getNextFileInDir(const std::string& dirname, ///< directory path - must end in trailing slash!
+                                  const std::string& mask,    ///< file pattern string (use "*" for all)
+                                  std::string& fname          ///< output: found file name
+                                  ) = 0;
+    /**<
+     * @returns true if a file was found, false if the entire directory has been scanned.
+     *
+     * @note that this function is NOT thread safe
+     *
+     * This function may not be used to scan part of a directory, then start a new search of a different
+     * directory, and then restart the first search where it left off; the entire search must run to
+     * completion or be abandoned - there is no restart.
+     *
+     * @bug: See http://jira.secondlife.com/browse/VWR-23697
+     *       and/or the tests in test/lldir_test.cpp
+     *       This is known to fail with patterns that have both:
+     *       a wildcard left of a . and more than one sequential ? right of a .
+     *       the pattern foo.??x appears to work
+     *       but *.??x or foo?.??x do not
+     *
+     * @todo this really should be rewritten as an iterator object, and the
+     *       filtering should be done in a platform-independent way.
+     */
+
 	virtual std::string getCurPath() = 0;
 	virtual BOOL fileExists(const std::string &filename) const = 0;