vbscript: Added '<>' expression implementation.

dlls/vbscript/compile.c

@@ -250,6 +250,8 @@ static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
         return compile_member_expression(ctx, (member_expression_t*)expr, TRUE);
     case EXPR_NEG:
         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_neg);
+    case EXPR_NEQUAL:
+        return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_nequal);
     case EXPR_NOT:
         return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_not);
     case EXPR_NULL:

dlls/vbscript/interp.c

@@ -367,6 +367,22 @@ static HRESULT interp_equal(exec_ctx_t *ctx)
     return stack_push(ctx, &v);
 }
 
+static HRESULT interp_nequal(exec_ctx_t *ctx)
+{
+    VARIANT v;
+    HRESULT hres;
+
+    TRACE("\n");
+
+    hres = cmp_oper(ctx);
+    if(FAILED(hres))
+        return hres;
+
+    V_VT(&v) = VT_BOOL;
+    V_BOOL(&v) = hres != VARCMP_EQ ? VARIANT_TRUE : VARIANT_FALSE;
+    return stack_push(ctx, &v);
+}
+
 static HRESULT interp_concat(exec_ctx_t *ctx)
 {
     variant_val_t r, l;

dlls/vbscript/parse.h

@@ -25,6 +25,7 @@ typedef enum {
     EXPR_EQUAL,
     EXPR_MEMBER,
     EXPR_NEG,
+    EXPR_NEQUAL,
     EXPR_NOT,
     EXPR_NULL,
     EXPR_STRING,

dlls/vbscript/parser.y

@@ -139,6 +139,7 @@ NotExpression
 EqualityExpression
     : ConcatExpression                          { $$ = $1; }
     | EqualityExpression '=' ConcatExpression   { $$ = new_binary_expression(ctx, EXPR_EQUAL, $1, $3); CHECK_ERROR; }
+    | EqualityExpression tNEQ ConcatExpression  { $$ = new_binary_expression(ctx, EXPR_NEQUAL, $1, $3); CHECK_ERROR; }
 
 ConcatExpression
     : AdditiveExpression                        { $$ = $1; }

dlls/vbscript/tests/lang.vbs

@@ -40,6 +40,11 @@ Call ok(&hffFFffFF& = -1, "&hffFFffFF& <> -1")
 Call ok(--1 = 1, "--1 = " & --1)
 Call ok(-empty = 0, "-empty = " & (-empty))
 
+Call ok(true <> false, "true <> false is false")
+Call ok(not (true <> true), "true <> true is true")
+Call ok(not ("x" <> "x"), """x"" <> ""x"" is true")
+Call ok(not (empty <> empty), "empty <> empty is true")
+
 Call ok(getVT(false) = "VT_BOOL", "getVT(false) is not VT_BOOL")
 Call ok(getVT(true) = "VT_BOOL", "getVT(true) is not VT_BOOL")
 Call ok(getVT("") = "VT_BSTR", "getVT("""") is not VT_BSTR")

dlls/vbscript/vbscript.h

@@ -98,6 +98,7 @@ typedef enum {
     X(icallv,         1, ARG_BSTR,    ARG_UINT)   \
     X(long,           1, ARG_INT,     0)          \
     X(neg,            1, 0,           0)          \
+    X(nequal,         1, 0,           0)          \
     X(not,            1, 0,           0)          \
     X(null,           1, 0,           0)          \
     X(ret,            0, 0,           0)          \