[PATCH v5 0/1] MR5020: Draft: kernelbase/file: implement CopyFile2

[Kartavya Vashishtha (＠kvashis)]

copy implementation of CopyFileExW into CopyFile2,
then implement CopyFileExW in terms of CopyFile2

should fix https://bugs.winehq.org/show_bug.cgi?id=55897, as Python does not use any new functionality nor the callback parameter from CopyFile2.

- followed [the Wiki](https://wiki.winehq.org/Developer_Hints#Implementing_new_API_calls) for adding a new API call
- run `file.c` tests and they seem to pass

I have not written extensive documentation since the original function didn't seem to have any; I can do that if recommended.

I originally intended to implement the callback functionality in this MR as well, but realized that would be better as a follow-up.

--
  v5: create CopyFile2_impl and CopyFile2

https://gitlab.winehq.org/wine/wine/-/merge_requests/5020

[PATCH v5 1/1] create CopyFile2_impl and CopyFile2

[Kartavya Vashishtha]

From: Kartavya Vashishtha

---
 dlls/kernelbase/file.c          | 59 ++++++++++++++++++++++++++++-----
 dlls/kernelbase/kernelbase.spec |  2 +-
 2 files changed, 52 insertions(+), 9 deletions(-)

diff --git a/dlls/kernelbase/file.c b/dlls/kernelbase/file.c
index e1ba92a6448..ab6653a15ea 100644
--- a/dlls/kernelbase/file.c
+++ b/dlls/kernelbase/file.c
@@ -487,14 +487,12 @@ BOOL WINAPI DECLSPEC_HOTPATCH AreFileApisANSI(void)
     return !oem_file_apis;
 }

+// uses the SetLastError style of error handling since CopyFileEx returns
+// WIN32 error codes and HRESULT to WIN32 conversion is easier
+// than the other way around.

-/***********************************************************************
- *	CopyFileExW   (kernelbase.@)
- */
-BOOL WINAPI CopyFileExW( const WCHAR *source, const WCHAR *dest, LPPROGRESS_ROUTINE progress,
-                         void *param, BOOL *cancel_ptr, DWORD flags )
-{
-    static const int buffer_size = 65536;
+static BOOL CopyFile2_impl ( const PCWSTR source, const PCWSTR dest, COPYFILE2_EXTENDED_PARAMETERS* params) {
+        static const int buffer_size = 65536;
     HANDLE h1, h2;
     FILE_BASIC_INFORMATION info;
     IO_STATUS_BLOCK io;
@@ -502,6 +500,15 @@ BOOL WINAPI CopyFileExW( const WCHAR *source, const WCHAR *dest, LPPROGRESS_ROUT
     BOOL ret = FALSE;
     char *buffer;

+    DWORD flags = params ? params->dwCopyFlags : 0;
+    BOOL *cancel_ptr = params ? params->pfCancel : NULL;
+    PCOPYFILE2_PROGRESS_ROUTINE progress = params ? params->pProgressRoutine : NULL;
+
+    if (cancel_ptr)
+        FIXME("pfCancel is not supported\n");
+    if (progress)
+        FIXME("PCOPYFILE2_PROGRESS_ROUTINE is not supported\n");
+
     if (!source || !dest)
     {
         SetLastError( ERROR_INVALID_PARAMETER );
@@ -577,7 +584,7 @@ BOOL WINAPI CopyFileExW( const WCHAR *source, const WCHAR *dest, LPPROGRESS_ROUT
             count -= res;
         }
     }
-    ret =  TRUE;
+    ret = TRUE;
 done:
     /* Maintain the timestamp of source file to destination file */
     info.FileAttributes = 0;
@@ -589,6 +596,42 @@ done:
     return ret;
 }

+/***********************************************************************
+ *	CopyFile2   (kernelbase.@)
+ */
+HRESULT WINAPI CopyFile2 ( const PCWSTR source , const PCWSTR dest, COPYFILE2_EXTENDED_PARAMETERS* params) {
+    DWORD prev_err = GetLastError();
+    HRESULT res;
+
+    res = CopyFile2_impl(source, dest, params) ? S_OK : HRESULT_FROM_WIN32(GetLastError());
+
+    SetLastError(prev_err);
+    return res;
+}
+
+
+/***********************************************************************
+ *	CopyFileExW   (kernelbase.@)
+ */
+BOOL WINAPI CopyFileExW( const WCHAR *source, const WCHAR *dest, LPPROGRESS_ROUTINE progress,
+                         void *param, BOOL *cancel_ptr, DWORD flags )
+{
+    COPYFILE2_EXTENDED_PARAMETERS params;
+
+    if (progress)
+        FIXME("LPPROGRESS_ROUTINE is not supported\n");
+    if (cancel_ptr)
+        FIXME("cancel_ptr is not supported\n");
+
+    params.dwSize = sizeof(params);
+    params.dwCopyFlags = flags;
+    params.pProgressRoutine = NULL;
+    params.pvCallbackContext = NULL;
+    params.pfCancel = NULL;
+
+    return CopyFile2_impl( source, dest, &params );
+}
+

/**************************************************************************
  *	CopyFileW   (kernelbase.@)
diff --git a/dlls/kernelbase/kernelbase.spec b/dlls/kernelbase/kernelbase.spec
index ffb153a46ee..bde4bc66bde 100644
--- a/dlls/kernelbase/kernelbase.spec
+++ b/dlls/kernelbase/kernelbase.spec
@@ -168,7 +168,7 @@
 @ stdcall ConvertThreadToFiberEx(ptr long)
 @ stdcall ConvertToAutoInheritPrivateObjectSecurity(ptr ptr ptr ptr long ptr)
 @ stdcall CopyContext(ptr long ptr)
-# @ stub CopyFile2
+@ stdcall CopyFile2(wstr wstr ptr)
 @ stdcall CopyFileExW(wstr wstr ptr ptr ptr long)
 @ stdcall CopyFileW(wstr wstr long)
 @ stdcall -arch=x86_64 CopyMemoryNonTemporal(ptr ptr long) ntdll.RtlCopyMemoryNonTemporal