Re: oleaut32: preliminary support for VT_DISPATCH as parameters to VarAdd (and other 2-operand operations) (try 2) (RESEND)

[Alex Villací­s Lasso]

Alexandre Julliard escribió:
Alex Villací­s Lasso <[EMAIL PROTECTED]> writes:
  
+#define HANDLE_DISPATCH(left, right) \
+    if ((V_VT(param_left) & VT_TYPEMASK) == VT_DISPATCH && \
+        (V_VT(param_right) & VT_TYPEMASK) != VT_NULL) \
+    {\
+        HRESULT hres;\
+        left = &tempLeft;\
+        hres = VARIANT_FetchDispatchValue(param_left, left);\
+        if (!SUCCEEDED(hres)) return hres;\
+    }\
+    if ((V_VT(param_right) & VT_TYPEMASK) == VT_DISPATCH &&\
+        (V_VT(param_left) & VT_TYPEMASK) != VT_NULL)\
+    {\
+        HRESULT hres;\
+        right = &tempRight;\
+        hres = VARIANT_FetchDispatchValue(param_right, right);\
+        if (!SUCCEEDED(hres)) return hres;\
+    }
    

This macro is quite ugly. Also I don't see why you check the other
variant against VT_NULL first, aren't there cases where you still need
the other value?

  
If I remove the check for VT_NULL on the other variant, I get this test 
failure:

../../../tools/runtest -q -P wine -M oleaut32.dll -T ../../.. -p 
oleaut32_test.exe.so vartest.c && touch vartest.ok
fixme:variant:VarMod Could not convert left type 4096 to 20? rc == 
0x80020008
fixme:variant:VarMod Could not convert left type 8192 to 20? rc == 
0x80020008
fixme:variant:VarMod Could not convert left type 16384 to 20? rc == 
0x80020008
vartest.c:4910: Test failed: VarAdd: 1|0x0, 9|0x0: expected S_OK, vt 1, 
got 0x80020005 vt 0
vartest.c:4910: Test failed: VarAdd: 9|0x0, 1|0x0: expected S_OK, vt 1, 
got 0x80020005 vt 0
make: *** [vartest.ok] Error 2

This happens because for VarAdd, VT_NULL + VT_DISPATCH should succeed 
and give VT_NULL as a result, but the patch fetches the result value of 
the VT_DISPATCH before doing anything else. For null VT_DISPATCHs like 
the ones the test feeds the function, this causes the fetch to fail 
before the code for handling VT_NULLs is reached.

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4F6E65204F5320746F2072756C65207468656D20616C6C2C204F6E65204F5320746F2066696E6420
7468656D2C0D0A4F6E65204F5320746F206272696E67207468656D20616C6C20616E6420696E2074
6865206461726B6E6573732062696E64207468656D2E0A

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