Jacek Caban : jscript: Added prefix decrement expression implementation.
Alexandre Julliard
julliard at winehq.org
Fri Sep 12 07:01:28 CDT 2008
Module: wine
Branch: master
Commit: ce423c2e3bdf0ba1d8d5c8f6ad7191bfbf07c173
URL: http://source.winehq.org/git/wine.git/?a=commit;h=ce423c2e3bdf0ba1d8d5c8f6ad7191bfbf07c173
Author: Jacek Caban <jacek at codeweavers.com>
Date: Thu Sep 11 23:58:03 2008 +0200
jscript: Added prefix decrement expression implementation.
---
dlls/jscript/engine.c | 34 +++++++++++++++++++++++++++++++---
dlls/jscript/tests/lang.js | 2 ++
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/dlls/jscript/engine.c b/dlls/jscript/engine.c
index f6d5d86..d9e6353 100644
--- a/dlls/jscript/engine.c
+++ b/dlls/jscript/engine.c
@@ -1582,10 +1582,38 @@ HRESULT pre_increment_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWOR
return S_OK;
}
-HRESULT pre_decrement_expression_eval(exec_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
+/* ECMA-262 3rd Edition 11.4.5 */
+HRESULT pre_decrement_expression_eval(exec_ctx_t *ctx, expression_t *_expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
{
- FIXME("\n");
- return E_NOTIMPL;
+ unary_expression_t *expr = (unary_expression_t*)_expr;
+ VARIANT val, num;
+ exprval_t exprval;
+ HRESULT hres;
+
+ TRACE("\n");
+
+ hres = expr_eval(ctx, expr->expression, EXPR_NEWREF, ei, &exprval);
+ if(FAILED(hres))
+ return hres;
+
+ hres = exprval_value(ctx->parser->script, &exprval, ei, &val);
+ if(SUCCEEDED(hres)) {
+ hres = to_number(ctx->parser->script, &val, ei, &num);
+ VariantClear(&val);
+ }
+
+ if(SUCCEEDED(hres)) {
+ num_set_val(&val, num_val(&num)-1.0);
+ hres = put_value(ctx->parser->script, &exprval, &val, ei);
+ }
+
+ exprval_release(&exprval);
+ if(FAILED(hres))
+ return hres;
+
+ ret->type = EXPRVAL_VARIANT;
+ ret->u.var = val;
+ return S_OK;
}
HRESULT new_expression_eval(exec_ctx_t *ctx, expression_t *expr, DWORD flags, jsexcept_t *ei, exprval_t *ret)
diff --git a/dlls/jscript/tests/lang.js b/dlls/jscript/tests/lang.js
index 269c9da..ef3e454 100644
--- a/dlls/jscript/tests/lang.js
+++ b/dlls/jscript/tests/lang.js
@@ -226,5 +226,7 @@ ok(0 >= 0, "0 >= 0");
tmp = 1;
ok(++tmp === 2, "++tmp (1) is not 2");
ok(tmp === 2, "incremented tmp is not 2");
+ok(--tmp === 1, "--tmp (2) is not 1");
+ok(tmp === 1, "decremented tmp is not 1");
reportSuccess();
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