kernelbase: Implement PathCchCombineEx.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=42474
Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/api-ms-win-core-path-l1-1-0/api-ms-win-core-path-l1-1-0.spec

@@ -8,7 +8,7 @@
 @ stdcall PathCchCanonicalize(ptr long wstr) kernelbase.PathCchCanonicalize
 @ stdcall PathCchCanonicalizeEx(ptr long wstr long) kernelbase.PathCchCanonicalizeEx
 @ stub PathCchCombine
-@ stub PathCchCombineEx
+@ stdcall PathCchCombineEx(ptr long wstr wstr long) kernelbase.PathCchCombineEx
 @ stdcall PathCchFindExtension(wstr long ptr) kernelbase.PathCchFindExtension
 @ stdcall PathCchIsRoot(wstr) kernelbase.PathCchIsRoot
 @ stdcall PathCchRemoveBackslash(wstr long) kernelbase.PathCchRemoveBackslash

dlls/kernelbase/kernelbase.spec

@@ -1037,7 +1037,7 @@
 @ stdcall PathCchCanonicalize(ptr long wstr)
 @ stdcall PathCchCanonicalizeEx(ptr long wstr long)
 # @ stub PathCchCombine
-# @ stub PathCchCombineEx
+@ stdcall PathCchCombineEx(ptr long wstr wstr long)
 @ stdcall PathCchFindExtension(wstr long ptr)
 @ stdcall PathCchIsRoot(wstr)
 @ stdcall PathCchRemoveBackslash(wstr long)

dlls/kernelbase/path.c

@@ -496,6 +496,38 @@ HRESULT WINAPI PathCchCanonicalizeEx(WCHAR *out, SIZE_T size, const WCHAR *in, D
     return hr;
 }
 
+HRESULT WINAPI PathCchCombineEx(WCHAR *out, SIZE_T size, const WCHAR *path1, const WCHAR *path2, DWORD flags)
+{
+    HRESULT hr;
+    WCHAR *buffer;
+    SIZE_T length;
+
+    TRACE("%p %s %s %#x\n", out, wine_dbgstr_w(path1), wine_dbgstr_w(path2), flags);
+
+    if (!out || !size || size > PATHCCH_MAX_CCH) return E_INVALIDARG;
+
+    hr = PathAllocCombine(path1, path2, flags, &buffer);
+    if (FAILED(hr))
+    {
+        out[0] = 0;
+        return hr;
+    }
+
+    length = strlenW(buffer);
+    if (length + 1 > size)
+    {
+        out[0] = 0;
+        LocalFree(buffer);
+        return STRSAFE_E_INSUFFICIENT_BUFFER;
+    }
+    else
+    {
+        memcpy(out, buffer, (length + 1) * sizeof(WCHAR));
+        LocalFree(buffer);
+        return S_OK;
+    }
+}
+
 HRESULT WINAPI PathCchFindExtension(const WCHAR *path, SIZE_T size, const WCHAR **extension)
 {
     const WCHAR *lastpoint = NULL;

dlls/kernelbase/tests/path.c

@@ -485,12 +485,19 @@ static void test_PathCchCombineEx(void)
 
     if (!pPathCchCombineEx)
     {
-        skip("PathCchCombineEx() is not available.\n");
+        win_skip("PathCchCombineEx() is not available.\n");
         return;
     }
 
+    output[0] = 0xff;
+    hr = pPathCchCombineEx(output, 5, NULL, NULL, 0);
+    ok(hr == E_INVALIDARG, "Expected E_INVALIDARG, got %08x\n", hr);
+    ok(output[0] == 0, "Expected output buffer to be empty\n");
+
+    output[0] = 0xff;
     hr = pPathCchCombineEx(NULL, 2, p1, p2, 0);
     ok(hr == E_INVALIDARG, "Expected E_INVALIDARG, got %08x\n", hr);
+    ok(output[0] == 0xff, "Expected output buffer to be unchanged\n");
 
     memset(output, 0xff, sizeof(output));
     hr = pPathCchCombineEx(output, 0, p1, p2, 0);
@@ -507,6 +514,14 @@ static void test_PathCchCombineEx(void)
     ok(hr == STRSAFE_E_INSUFFICIENT_BUFFER, "Expected STRSAFE_E_INSUFFICIENT_BUFFER, got %08x\n", hr);
     ok(output[0] == 0x0, "Expected output buffer to contain NULL string\n");
 
+    output[0] = 0xff;
+    hr = pPathCchCombineEx(output, PATHCCH_MAX_CCH + 1, p1, p2, 0);
+    ok(hr == E_INVALIDARG, "Expected E_INVALIDARG, got %08x\n", hr);
+    ok(output[0] == 0xff, "Expected output buffer to be 0xff\n");
+
+    hr = pPathCchCombineEx(output, PATHCCH_MAX_CCH, p1, p2, 0);
+    ok(hr == S_OK, "Expected S_OK, got %08x\n", hr);
+
     memset(output, 0xff, sizeof(output));
     hr = pPathCchCombineEx(output, 5, p1, p2, 0);
     ok(hr == S_OK, "Expected S_OK, got %08x\n", hr);
@@ -2029,12 +2044,12 @@ START_TEST(path)
 
     pPathAllocCanonicalize = (void *)GetProcAddress(hmod, "PathAllocCanonicalize");
     pPathAllocCombine = (void *)GetProcAddress(hmod, "PathAllocCombine");
-    pPathCchCombineEx = (void *)GetProcAddress(hmod, "PathCchCombineEx");
     pPathCchAddBackslash = (void *)GetProcAddress(hmod, "PathCchAddBackslash");
     pPathCchAddBackslashEx = (void *)GetProcAddress(hmod, "PathCchAddBackslashEx");
     pPathCchAddExtension = (void *)GetProcAddress(hmod, "PathCchAddExtension");
     pPathCchCanonicalize = (void *)GetProcAddress(hmod, "PathCchCanonicalize");
     pPathCchCanonicalizeEx = (void *)GetProcAddress(hmod, "PathCchCanonicalizeEx");
+    pPathCchCombineEx = (void *)GetProcAddress(hmod, "PathCchCombineEx");
     pPathCchFindExtension = (void *)GetProcAddress(hmod, "PathCchFindExtension");
     pPathCchIsRoot = (void *)GetProcAddress(hmod, "PathCchIsRoot");
     pPathCchRemoveBackslash = (void *)GetProcAddress(hmod, "PathCchRemoveBackslash");
@@ -2049,12 +2064,12 @@ START_TEST(path)
 
     test_PathAllocCanonicalize();
     test_PathAllocCombine();
-    test_PathCchCombineEx();
     test_PathCchAddBackslash();
     test_PathCchAddBackslashEx();
     test_PathCchAddExtension();
     test_PathCchCanonicalize();
     test_PathCchCanonicalizeEx();
+    test_PathCchCombineEx();
     test_PathCchFindExtension();
     test_PathCchIsRoot();
     test_PathCchRemoveBackslash();