From 5a7b68fcc12857dad9f30aa27410467e537cd197 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Tue, 2 May 2023 08:52:54 +0300
Subject: [PATCH] filesystem: add new export FS_GetFullDiskPath, similar to
 FS_GetDiskPath, but generates full path to the file, including searchpath

---
 engine/common/common.c           |  5 +----
 filesystem/VFileSystem009.cpp    |  2 +-
 filesystem/VFileSystem009.h      |  2 ++
 filesystem/filesystem.c          | 29 +++++++++++++++++++++++++++++
 filesystem/filesystem.h          |  8 +++++---
 filesystem/filesystem_internal.h |  1 +
 filesystem/tests/interface.cpp   |  2 +-
 7 files changed, 40 insertions(+), 9 deletions(-)

diff --git a/engine/common/common.c b/engine/common/common.c
index 391b4e50..23c97880 100644
--- a/engine/common/common.c
+++ b/engine/common/common.c
@@ -553,7 +553,6 @@ This doesn't search in the pak file.
 */
 int GAME_EXPORT COM_ExpandFilename( const char *fileName, char *nameOutBuffer, int nameOutBufferSize )
 {
-	const char	*path;
 	char		result[MAX_SYSPATH];
 
 	if( !COM_CheckString( fileName ) || !nameOutBuffer || nameOutBufferSize <= 0 )
@@ -562,10 +561,8 @@ int GAME_EXPORT COM_ExpandFilename( const char *fileName, char *nameOutBuffer, i
 	// filename examples:
 	// media\sierra.avi - D:\Xash3D\valve\media\sierra.avi
 	// models\barney.mdl - D:\Xash3D\bshift\models\barney.mdl
-	if(( path = FS_GetDiskPath( fileName, false )) != NULL )
+	if( g_fsapi.GetFullDiskPath( result, sizeof( result ), fileName, false ))
 	{
-		Q_snprintf( result, sizeof( result ), "%s/%s", host.rootdir, path );
-
 		// check for enough room
 		if( Q_strlen( result ) > nameOutBufferSize )
 			return 0;
diff --git a/filesystem/VFileSystem009.cpp b/filesystem/VFileSystem009.cpp
index 250f494d..1dcde90e 100644
--- a/filesystem/VFileSystem009.cpp
+++ b/filesystem/VFileSystem009.cpp
@@ -511,7 +511,7 @@ public:
 
 extern "C" void EXPORT *CreateInterface( const char *interface, int *retval )
 {
-	if( !Q_strcmp( interface, "VFileSystem009" ))
+	if( !Q_strcmp( interface, FILESYSTEM_INTERFACE_VERSION ))
 	{
 		if( retval )
 			*retval = 0;
diff --git a/filesystem/VFileSystem009.h b/filesystem/VFileSystem009.h
index e48f4b7a..60437154 100644
--- a/filesystem/VFileSystem009.h
+++ b/filesystem/VFileSystem009.h
@@ -150,4 +150,6 @@ public:
 	virtual void AddSearchPathNoWrite(const char *, const char *) = 0; /* linkage=_ZN11IFileSystem20AddSearchPathNoWriteEPKcS1_ */
 };
 
+#define FILESYSTEM_INTERFACE_VERSION "VFileSystem009" // never change this!
+
 #endif // VFILESYSTEM009_H
diff --git a/filesystem/filesystem.c b/filesystem/filesystem.c
index 6d4389d4..157cd403 100644
--- a/filesystem/filesystem.c
+++ b/filesystem/filesystem.c
@@ -2432,6 +2432,30 @@ const char *FS_GetDiskPath( const char *name, qboolean gamedironly )
 	return NULL;
 }
 
+/*
+==================
+FS_GetFullDiskPath
+
+Build full path for file on disk
+return false for file in pack
+==================
+*/
+qboolean FS_GetFullDiskPath( char *buffer, size_t size, const char *name, qboolean gamedironly )
+{
+	searchpath_t *search;
+	char temp[MAX_SYSPATH];
+
+	search = FS_FindFile( name, NULL, temp, sizeof( temp ), gamedironly );
+
+	if( search && search->type == SEARCHPATH_PLAIN )
+	{
+		Q_snprintf( buffer, size, "%s/%s", search->filename, temp );
+		return true;
+	}
+
+	return false;
+}
+
 /*
 ==================
 FS_FileSize
@@ -2773,6 +2797,11 @@ fs_api_t g_api =
 	FS_Delete,
 	FS_SysFileExists,
 	FS_GetDiskPath,
+
+	NULL,
+	NULL,
+
+	FS_GetFullDiskPath,
 };
 
 int EXPORT GetFSAPI( int version, fs_api_t *api, fs_globals_t **globals, fs_interface_t *engfuncs )
diff --git a/filesystem/filesystem.h b/filesystem/filesystem.h
index e245984e..0b46f9af 100644
--- a/filesystem/filesystem.h
+++ b/filesystem/filesystem.h
@@ -182,9 +182,11 @@ typedef struct fs_api_t
 	qboolean (*SysFileExists)( const char *path );
 	const char *(*GetDiskPath)( const char *name, qboolean gamedironly );
 
-	// file watcher
-	void (*WatchFrame)( void ); // engine will read all events and call appropriate callbacks
-	qboolean (*AddWatch)( const char *path, fs_event_callback_t callback );
+	// reserved
+	void (*Unused0)( void );
+	void (*Unused1)( void );
+
+	qboolean (*GetFullDiskPath)( char *buffer, size_t size, const char *name, qboolean gamedironly );
 } fs_api_t;
 
 typedef struct fs_interface_t
diff --git a/filesystem/filesystem_internal.h b/filesystem/filesystem_internal.h
index 51748b22..378e0554 100644
--- a/filesystem/filesystem_internal.h
+++ b/filesystem/filesystem_internal.h
@@ -177,6 +177,7 @@ qboolean FS_Rename( const char *oldname, const char *newname );
 qboolean FS_Delete( const char *path );
 qboolean FS_SysFileExists( const char *path );
 const char *FS_GetDiskPath( const char *name, qboolean gamedironly );
+qboolean FS_GetFullDiskPath( char *buffer, size_t size, const char *name, qboolean gamedironly );
 void     FS_CreatePath( char *path );
 qboolean FS_SysFolderExists( const char *path );
 qboolean FS_SysFileOrFolderExists( const char *path );
diff --git a/filesystem/tests/interface.cpp b/filesystem/tests/interface.cpp
index 889c59a2..5bdbe001 100644
--- a/filesystem/tests/interface.cpp
+++ b/filesystem/tests/interface.cpp
@@ -48,7 +48,7 @@ static bool LoadFilesystem()
 	if( !g_pfnCreateInterface )
 		return false;
 
-	if( !g_pfnCreateInterface( "VFileSystem009", &temp ) || temp != 0 )
+	if( !g_pfnCreateInterface( FILESYSTEM_INTERFACE_VERSION, &temp ) || temp != 0 )
 		return false;
 
 	temp = -1;