From 6c0d1118bc5f61fbd86672aba74c3c640ec233cc Mon Sep 17 00:00:00 2001
From: Mikko Kokko <kokon.mikko@gmail.com>
Date: Thu, 29 Dec 2022 02:59:13 +0200
Subject: [PATCH] Update IFileSystem (#121)

---
 public/filesystem.h          | 15 ++++++++++++++-
 public/filesystem_passthru.h |  7 ++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/public/filesystem.h b/public/filesystem.h
index a806f320..d388e899 100644
--- a/public/filesystem.h
+++ b/public/filesystem.h
@@ -402,6 +402,13 @@ public:
 	virtual void	Reset() = 0;
 };
 
+enum EFileSystemPureState
+{
+	k_eFileSystemPureWhitelist,		// File system is in pure whitelist mode
+	k_eFileSystemPureAllowDisk,		// File system is allowing to load from disk, but has not loaded third-party files yet
+	k_eFileSystemPureLoadedFromDisk	// File system has loaded third-party files from disk
+};
+
 
 // Spew flags for SetWhitelistSpewFlags (set with the fs_whitelist_spew_flags cvar).
 // Update the comment for the fs_whitelist_spew_flags cvar if you change these.
@@ -514,7 +521,7 @@ public:
 	// remember it in case you add search paths with this path ID.
 	virtual void			MarkPathIDByRequestOnly( const char *pPathID, bool bRequestOnly ) = 0;
 	
-	virtual bool			BUnknown() = 0;
+	virtual bool			IsFileInReadOnlySearchPath( const char *pFileName, const char *pPathID ) = 0;
 
 	// converts a partial path into a full path
 	virtual const char		*RelativePathToFullPath( const char *pFileName, const char *pPathID, char *pLocalPath, int localPathBufferSize, PathTypeFilter_t pathFilter = FILTER_NONE, PathTypeQuery_t *pPathType = NULL ) = 0;
@@ -847,9 +854,15 @@ public:
 	
 	virtual IIoStats		*GetIoStats() = 0;
 	
+	virtual EFileSystemPureState	GetPureState() = 0;
+	virtual void					AllowLoadFromDisk( bool bAllowLoadFromDisk ) = 0;
+	
 	virtual void			CacheAllVPKFileHashes( bool bCacheAllVPKHashes, bool bRecalculateAndCheckHashes ) = 0;
 	virtual bool			CheckVPKFileHash( int PackFileID, int nPackFileNumber, int nFileFraction, MD5Value_t &md5Value ) = 0;
 	virtual void			GetVPKFileStatisticsKV( KeyValues *pKV ) = 0;
+	
+	virtual void			SetDisallowOutsideWrites( bool bDisallow ) = 0;
+	virtual bool			GetDisallowOutsideWrites() = 0;
 };
 
 //-----------------------------------------------------------------------------
diff --git a/public/filesystem_passthru.h b/public/filesystem_passthru.h
index 357cf0d4..3b7ab902 100644
--- a/public/filesystem_passthru.h
+++ b/public/filesystem_passthru.h
@@ -277,7 +277,12 @@ public:
 	virtual void			GetVPKFileStatisticsKV( KeyValues *pKV )
 		{ m_pFileSystemPassThru->GetVPKFileStatisticsKV( pKV ); }
 	
-	virtual bool			BUnknown() { return m_pFileSystemPassThru->BUnknown(); }
+	virtual bool			IsFileInReadOnlySearchPath( const char *pFileName, const char *pPathID ) { return m_pFileSystemPassThru->IsFileInReadOnlySearchPath( pFileName, pPathID ); }
+
+	virtual EFileSystemPureState	GetPureState() { return m_pFileSystemPassThru->GetPureState(); }
+	virtual void					AllowLoadFromDisk( bool bAllowLoadFromDisk ) { return m_pFileSystemPassThru->AllowLoadFromDisk( bAllowLoadFromDisk ); }
+	virtual void					SetDisallowOutsideWrites( bool bDisallow ) { return m_pFileSystemPassThru->SetDisallowOutsideWrites( bDisallow ); }
+	virtual bool					GetDisallowOutsideWrites() { return m_pFileSystemPassThru->GetDisallowOutsideWrites(); }
 
 protected:
 	IFileSystem *m_pFileSystemPassThru;