Rewrite FileSearch and improve ScanDirectoryTree.

- FileSearch is now just one function, and it converts the original glob
  into a regex on all platforms rather than relying on native Windows
  pattern matching on there and a complete hack elsewhere.  It now
  supports recursion out of the box rather than manually expanding
  into a full list of directories in multiple call sites.

  - This adds a GCC >= 4.9 dependency due to older versions having
  outright broken <regex>.  MSVC is fine with it.

- ScanDirectoryTree returns the parent entry rather than filling parts
  of it in via reference.  The count is now stored in the entry like it
  was for subdirectories.

- .glsl file search is now done with DoFileSearch.

- IOCTLV_READ_DIR now uses ScanDirectoryTree directly and sorts the
  results after replacements for better determinism.

1 files changed, 2 insertions, 8 deletions

diff --git a/Source/Core/DolphinWX/FrameTools.cpp b/Source/Core/DolphinWX/FrameTools.cpp
index 47aecfef4b..04e31fbfaf 100644
--- a/Source/Core/DolphinWX/FrameTools.cpp
+++ b/Source/Core/DolphinWX/FrameTools.cpp
@@ -1966,15 +1966,9 @@ void CFrame::GameListChanged(wxCommandEvent& event)
 		SConfig::GetInstance().m_ListDrives = event.IsChecked();
 		break;
 	case IDM_PURGE_CACHE:
-		CFileSearch::XStringVector Directories;
-		Directories.push_back(File::GetUserPath(D_CACHE_IDX));
-		CFileSearch::XStringVector Extensions;
-		Extensions.push_back("*.cache");
+		std::vector<std::string> rFilenames = DoFileSearch({"*.cache"}, {File::GetUserPath(D_CACHE_IDX)});
 
-		CFileSearch FileSearch(Extensions, Directories);
-		const CFileSearch::XStringVector& rFilenames = FileSearch.GetFileNames();
-
-		for (auto& rFilename : rFilenames)
+		for (const std::string& rFilename : rFilenames)
 		{
 			File::Delete(rFilename);
 		}