Matteo Bruni : d3dx9: Use an assert() to validate access to const_tbl[].

[Alexandre Julliard]

Module: wine
Branch: master
Commit: cfc533b40d2d1426a8f05501152b28aa1ec78f07
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=cfc533b40d2d1426a8f055011...

Author: Matteo Bruni 
Date:   Tue Mar 24 15:17:16 2020 +0100

d3dx9: Use an assert() to validate access to const_tbl[].

This check is essentially validating that the hardcoded state_table[]
has reasonable values for the shader constant states. Use ARRAY_SIZE()
to avoid warnings if the compiler chooses an unsigned integer to back
enum SHADER_CONSTANT_TYPE.

Based on an idea by Henri Verbeet.

Signed-off-by: Matteo Bruni 
Signed-off-by: Jacek Caban 
Signed-off-by: Alexandre Julliard

---

dlls/d3dx9_36/effect.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/dlls/d3dx9_36/effect.c b/dlls/d3dx9_36/effect.c
index 88168df1e1..525b87340b 100644
--- a/dlls/d3dx9_36/effect.c
+++ b/dlls/d3dx9_36/effect.c
@@ -1469,11 +1469,7 @@ static HRESULT d3dx_set_shader_const_state(struct d3dx_effect *effect, enum SHAD
     D3DXVECTOR4 value;
     HRESULT ret;

-    if (op < 0 || op > SCT_PSINT)
-    {
-        FIXME("Unknown op %u.\n", op);
-        return D3DERR_INVALIDCALL;
-    }
+    assert(op < ARRAY_SIZE(const_tbl));
     element_count = param->bytes / const_tbl[op].elem_size;
     TRACE("%s, index %u, element_count %u.\n", const_tbl[op].name, index, element_count);
     if (param->type != const_tbl[op].type)