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user32: Pack the HELPINFO structure in messages to allow crossing 32/64 boundaries.

This commit is contained in:
Alexandre Julliard 2010-03-30 20:34:08 +02:00
parent 8ec6cfedea
commit eba2ec4ab1
1 changed files with 33 additions and 2 deletions
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35
dlls/user32/message.c
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@ -146,6 +146,17 @@ struct packed_COPYDATASTRUCT
ULONGLONG lpData;
};
struct packed_HELPINFO
{
UINT cbSize;
INT iContextType;
INT iCtrlId;
user_handle_t hItemHandle;
DWORD __pad;
ULONGLONG dwContextId;
POINT MousePos;
};
/* the structures are unpacked on top of the packed ones, so make sure they fit */
C_ASSERT( sizeof(struct packed_CREATESTRUCTW) >= sizeof(CREATESTRUCTW) );
C_ASSERT( sizeof(struct packed_DRAWITEMSTRUCT) >= sizeof(DRAWITEMSTRUCT) );
@ -154,6 +165,7 @@ C_ASSERT( sizeof(struct packed_DELETEITEMSTRUCT) >= sizeof(DELETEITEMSTRUCT) );
C_ASSERT( sizeof(struct packed_COMPAREITEMSTRUCT) >= sizeof(COMPAREITEMSTRUCT) );
C_ASSERT( sizeof(struct packed_WINDOWPOS) >= sizeof(WINDOWPOS) );
C_ASSERT( sizeof(struct packed_COPYDATASTRUCT) >= sizeof(COPYDATASTRUCT) );
C_ASSERT( sizeof(struct packed_HELPINFO) >= sizeof(HELPINFO) );
union packed_structs
{
@ -164,6 +176,7 @@ union packed_structs
struct packed_COMPAREITEMSTRUCT cis;
struct packed_WINDOWPOS wp;
struct packed_COPYDATASTRUCT cds;
struct packed_HELPINFO hi;
};
/* description of the data fields that need to be packed along with a sent message */
@ -783,8 +796,16 @@ static size_t pack_message( HWND hwnd, UINT message, WPARAM wparam, LPARAM lpara
data->count = -1;
return 0;
case WM_HELP:
push_data( data, (HELPINFO *)lparam, sizeof(HELPINFO) );
{
HELPINFO *hi = (HELPINFO *)lparam;
data->ps.hi.iContextType = hi->iContextType;
data->ps.hi.iCtrlId = hi->iCtrlId;
data->ps.hi.hItemHandle = wine_server_user_handle( hi->hItemHandle );
data->ps.hi.dwContextId = hi->dwContextId;
data->ps.hi.MousePos = hi->MousePos;
push_data( data, &data->ps.hi, sizeof(data->ps.hi) );
return 0;
}
case WM_STYLECHANGING:
case WM_STYLECHANGED:
push_data( data, (STYLESTRUCT *)lparam, sizeof(STYLESTRUCT) );
@ -1114,8 +1135,18 @@ static BOOL unpack_message( HWND hwnd, UINT message, WPARAM *wparam, LPARAM *lpa
/* WM_NOTIFY cannot be sent across processes (MSDN) */
return FALSE;
case WM_HELP:
minsize = sizeof(HELPINFO);
{
HELPINFO hi;
if (size < sizeof(ps->hi)) return FALSE;
hi.cbSize = sizeof(hi);
hi.iContextType = ps->hi.iContextType;
hi.iCtrlId = ps->hi.iCtrlId;
hi.hItemHandle = wine_server_ptr_handle( ps->hi.hItemHandle );
hi.dwContextId = (ULONG_PTR)unpack_ptr( ps->hi.dwContextId );
hi.MousePos = ps->hi.MousePos;
memcpy( &ps->hi, &hi, sizeof(hi) );
break;
}
case WM_STYLECHANGING:
case WM_STYLECHANGED:
minsize = sizeof(STYLESTRUCT);