From e4ad8def0dca2bb89904887553517cc3dcea600b Mon Sep 17 00:00:00 2001
From: SNMetamorph <25657591+SNMetamorph@users.noreply.github.com>
Date: Sun, 3 Oct 2021 10:08:03 +0400
Subject: [PATCH] engine: filesystem: fixed current directory changing for
 Windows

---
 common/port.h              |  2 --
 engine/common/common.h     |  1 +
 engine/common/filesystem.c | 38 ++++++++++++++++++++++++++++++++++++++
 engine/common/host.c       |  2 +-
 4 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/common/port.h b/common/port.h
index 102b6dff..183f1fe7 100644
--- a/common/port.h
+++ b/common/port.h
@@ -61,7 +61,6 @@ GNU General Public License for more details.
 	#define _mkdir( x )					mkdir( x, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH )
 	#define LoadLibrary( x )			dlopen( x, RTLD_NOW )
 	#define GetProcAddress( x, y )		dlsym( x, y )
-	#define SetCurrentDirectory( x )	(!chdir( x ))
 	#define FreeLibrary( x )			dlclose( x )
 	#define tell( a )					lseek(a, 0, SEEK_CUR)
 	#define HAVE_DUP
@@ -72,7 +71,6 @@ GNU General Public License for more details.
 	#define LoadLibrary( x ) (0)
 	#define GetProcAddress( x, y ) (0)
 	#define FreeLibrary( x ) (0)
-	#define SetCurrentDirectory( x )	(!chdir( x ))
 #endif
 	//#define MAKEWORD( a, b )			((short int)(((unsigned char)(a))|(((short int)((unsigned char)(b)))<<8)))
 	#define max( a, b )                 (((a) > (b)) ? (a) : (b))
diff --git a/engine/common/common.h b/engine/common/common.h
index 7470877e..d6b77ff7 100644
--- a/engine/common/common.h
+++ b/engine/common/common.h
@@ -566,6 +566,7 @@ int FS_FileTime( const char *filename, qboolean gamedironly );
 int FS_Print( file_t *file, const char *msg );
 qboolean FS_Rename( const char *oldname, const char *newname );
 int FS_FileExists( const char *filename, int gamedironly );
+int FS_SetCurrentDirectory( const char *path );
 qboolean FS_SysFileExists( const char *path, qboolean casesensitive );
 qboolean FS_FileCopy( file_t *pOutput, file_t *pInput, int fileSize );
 qboolean FS_Delete( const char *path );
diff --git a/engine/common/filesystem.c b/engine/common/filesystem.c
index c0fe69cd..72efd475 100644
--- a/engine/common/filesystem.c
+++ b/engine/common/filesystem.c
@@ -463,6 +463,22 @@ static const char *FS_FixFileCase( const char *path )
 	return path;
 }
 
+#if XASH_WIN32
+/*
+====================
+FS_PathToWideChar
+
+Converts input UTF-8 string to wide char string.
+====================
+*/
+const wchar_t *FS_PathToWideChar( const char *path )
+{
+	static wchar_t pathBuffer[MAX_PATH];
+	MultiByteToWideChar( CP_UTF8, 0, path, -1, pathBuffer, MAX_PATH );
+	return pathBuffer;
+}
+#endif
+
 /*
 ====================
 FS_AddFileToPack
@@ -2240,7 +2256,11 @@ static file_t *FS_SysOpen( const char *filepath, const char *mode )
 	file->filetime = FS_SysFileTime( filepath );
 	file->ungetc = EOF;
 
+#if XASH_WIN32
+	file->handle = _wopen( FS_PathToWideChar(filepath), mod | opt, 0666 );
+#else
 	file->handle = open( filepath, mod|opt, 0666 );
+#endif
 
 #if !XASH_WIN32
 	if( file->handle < 0 )
@@ -2394,6 +2414,24 @@ qboolean FS_SysFileExists( const char *path, qboolean caseinsensitive )
 #endif
 }
 
+/*
+==================
+FS_SetCurrentDirectory
+
+Sets current directory, path should be in UTF-8 encoding
+==================
+*/
+int FS_SetCurrentDirectory( const char *path )
+{
+#if XASH_WIN32
+	return SetCurrentDirectoryW( FS_PathToWideChar(path) );
+#elif XASH_POSIX
+	return !chdir( path );
+#else
+#error
+#endif
+}
+
 /*
 ==================
 FS_SysFolderExists
diff --git a/engine/common/host.c b/engine/common/host.c
index b183ca3b..82d19c79 100644
--- a/engine/common/host.c
+++ b/engine/common/host.c
@@ -980,7 +980,7 @@ void Host_InitCommon( int argc, char **argv, const char *progname, qboolean bCha
 	if( len && host.rodir[len - 1] == '/' )
 		host.rodir[len - 1] = 0;
 
-	if( !COM_CheckStringEmpty( host.rootdir ) || SetCurrentDirectory( host.rootdir ) != 0 )
+	if( !COM_CheckStringEmpty( host.rootdir ) || FS_SetCurrentDirectory( host.rootdir ) != 0 )
 		Con_Reportf( "%s is working directory now\n", host.rootdir );
 	else
 		Sys_Error( "Changing working directory to %s failed.\n", host.rootdir );