ntdll: Add a helper to initialize a UNICODE_STRING on the Unix side.

dlls/ntdll/unix/env.c

@@ -168,9 +168,7 @@ static NTSTATUS open_nls_data_file( ULONG type, ULONG id, HANDLE *file )
     wcscpy( buffer, type == NLS_SECTION_SORTKEYS ? sortdirW : systemdirW );
     p = strrchr( path, '/' ) + 1;
     ascii_to_unicode( buffer + wcslen(buffer), p, strlen(p) + 1 );
-    valueW.Buffer = buffer;
-    valueW.Length = wcslen( buffer ) * sizeof(WCHAR);
-    valueW.MaximumLength = sizeof( buffer );
+    init_unicode_string( &valueW, buffer );
     InitializeObjectAttributes( &attr, &valueW, 0, 0, NULL );
 
     status = open_unix_file( file, path, GENERIC_READ, &attr, 0, FILE_SHARE_READ,
@@ -1645,9 +1643,7 @@ NTSTATUS WINAPI NtGetNlsSectionPtr( ULONG type, ULONG id, void *unknown, void **
 
     if ((status = get_nls_section_name( type, id, name ))) return status;
 
-    nameW.Buffer = name;
-    nameW.Length = wcslen(name) * sizeof(WCHAR);
-    nameW.MaximumLength = sizeof(name);
+    init_unicode_string( &nameW, name );
     InitializeObjectAttributes( &attr, &nameW, 0, 0, NULL );
     if ((status = NtOpenSection( &handle, SECTION_MAP_READ, &attr )))
     {

dlls/ntdll/unix/file.c

@@ -1974,8 +1974,7 @@ static NTSTATUS get_mountmgr_fs_info( HANDLE handle, int fd, struct mountmgr_uni
     else
         drive->letter = 'a' + letter;
 
-    string.Buffer = (WCHAR *)MOUNTMGR_DEVICE_NAME;
-    string.Length = sizeof(MOUNTMGR_DEVICE_NAME) - sizeof(WCHAR);
+    init_unicode_string( &string, MOUNTMGR_DEVICE_NAME );
     InitializeObjectAttributes( &attr, &string, 0, NULL, NULL );
     status = NtOpenFile( &mountmgr, GENERIC_READ | SYNCHRONIZE, &attr, &io,
                          FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_SYNCHRONOUS_IO_NONALERT );
@@ -2750,10 +2749,8 @@ static NTSTATUS open_hkcu_key( const char *path, HANDLE *key )
         len += sprintf( buffer + len, "-%u", sid->SubAuthority[i] );
     len += sprintf( buffer + len, "\\%s", path );
 
-    name.Buffer = bufferW;
-    name.Length = len * sizeof(WCHAR);
-    name.MaximumLength = name.Length + sizeof(WCHAR);
     ascii_to_unicode( bufferW, buffer, len + 1 );
+    init_unicode_string( &name, bufferW );
     InitializeObjectAttributes( &attr, &name, OBJ_CASE_INSENSITIVE, 0, NULL );
     return NtCreateKey( key, KEY_ALL_ACCESS, &attr, 0, NULL, 0, NULL );
 }
@@ -2787,9 +2784,7 @@ void init_files(void)
         DWORD dummy;
         UNICODE_STRING nameW;
 
-        nameW.MaximumLength = sizeof(showdotfilesW);
-        nameW.Length = nameW.MaximumLength - sizeof(WCHAR);
-        nameW.Buffer = showdotfilesW;
+        init_unicode_string( &nameW, showdotfilesW );
         if (!NtQueryValueKey( key, &nameW, KeyValuePartialInformation, tmp, sizeof(tmp), &dummy ))
         {
             WCHAR *str = (WCHAR *)((KEY_VALUE_PARTIAL_INFORMATION *)tmp)->Data;

dlls/ntdll/unix/loader.c

@@ -1618,9 +1618,7 @@ static void load_ntdll(void)
     void *module;
     char *name = build_path( dll_dir, "ntdll.dll.so" );
 
-    str.Buffer = path;
-    str.Length = sizeof(path) - sizeof(WCHAR);
-    str.MaximumLength = sizeof(path);
+    init_unicode_string( &str, path );
     InitializeObjectAttributes( &attr, &str, 0, 0, NULL );
     name[strlen(name) - 3] = 0;  /* remove .so */
     status = open_builtin_file( name, &attr, &mapping, &module, &info, &st, FALSE );

dlls/ntdll/unix/system.c

@@ -1809,9 +1809,7 @@ static void find_reg_tz_info(RTL_DYNAMIC_TIME_ZONE_INFORMATION *tzi, const char*
 
     sprintf( buffer, "%u", year );
     ascii_to_unicode( yearW, buffer, strlen(buffer) + 1 );
-
-    nameW.Buffer = (WCHAR *)Time_ZonesW;
-    nameW.Length = sizeof(Time_ZonesW) - sizeof(WCHAR);
+    init_unicode_string( &nameW, Time_ZonesW );
     InitializeObjectAttributes( &attr, &nameW, 0, 0, NULL );
     if (NtOpenKey( &key, KEY_READ, &attr )) return;
 

dlls/ntdll/unix/unix_private.h

@@ -482,4 +482,11 @@ static inline int ntdll_wcsnicmp( const WCHAR *str1, const WCHAR *str2, int n )
 #define towupper(c)        ntdll_towupper(c)
 #define towlower(c)        ntdll_towlower(c)
 
+static inline void init_unicode_string( UNICODE_STRING *str, const WCHAR *data )
+{
+    str->Length = wcslen(data) * sizeof(WCHAR);
+    str->MaximumLength = str->Length + sizeof(WCHAR);
+    str->Buffer = (WCHAR *)data;
+}
+
 #endif /* __NTDLL_UNIX_PRIVATE_H */