Add a way to restrict ISO reading to a single path.

This is for GameInfoCache.

Core/FileSystems/ISOFileSystem.h

@@ -20,6 +20,7 @@
 #include <map>
 #include <string>
 #include <list>
+#include <vector>
 
 #include "FileSystem.h"
 
@@ -29,7 +30,7 @@
 class ISOFileSystem : public IFileSystem
 {
 public:
-	ISOFileSystem(IHandleAllocator *_hAlloc, BlockDevice *_blockDevice);
+	ISOFileSystem(IHandleAllocator *_hAlloc, BlockDevice *_blockDevice, std::string _restrictPath = "");
 	~ISOFileSystem();
 	void DoState(PointerWrap &p);
 	std::vector<PSPFileInfo> GetDirListing(std::string path);
@@ -87,7 +88,10 @@ private:
 
 	TreeEntry entireISO;
 
-	void ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root);
+	// Don't use this in the emu, not savestated.
+	std::vector<std::string> restrictTree;
+
+	void ReadDirectory(u32 startsector, u32 dirsize, TreeEntry *root, size_t level);
 	TreeEntry *GetFromPath(std::string path, bool catchError=true);
 	std::string EntryFullPath(TreeEntry *e);