jscript: Added String.concat implementation.

dlls/jscript/string.c

@@ -241,11 +241,62 @@ static HRESULT String_charCodeAt(DispatchEx *dispex, LCID lcid, WORD flags, DISP
     return S_OK;
 }
 
+/* ECMA-262 3rd Edition    15.5.4.6 */
 static HRESULT String_concat(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,
         VARIANT *retv, jsexcept_t *ei, IServiceProvider *sp)
 {
-    FIXME("\n");
-    return E_NOTIMPL;
+    BSTR *strs = NULL, ret = NULL;
+    DWORD len = 0, i, l, str_cnt;
+    VARIANT var;
+    WCHAR *ptr;
+    HRESULT hres;
+
+    TRACE("\n");
+
+    str_cnt = arg_cnt(dp)+1;
+    strs = heap_alloc_zero(str_cnt * sizeof(BSTR));
+    if(!strs)
+        return E_OUTOFMEMORY;
+
+    V_VT(&var) = VT_DISPATCH;
+    V_DISPATCH(&var) = (IDispatch*)_IDispatchEx_(dispex);
+
+    hres = to_string(dispex->ctx, &var, ei, strs);
+    if(SUCCEEDED(hres)) {
+        for(i=0; i < arg_cnt(dp); i++) {
+            hres = to_string(dispex->ctx, get_arg(dp, i), ei, strs+i+1);
+            if(FAILED(hres))
+                break;
+        }
+    }
+
+    if(SUCCEEDED(hres)) {
+        for(i=0; i < str_cnt; i++)
+            len += SysStringLen(strs[i]);
+
+        ptr = ret = SysAllocStringLen(NULL, len);
+
+        for(i=0; i < str_cnt; i++) {
+            l = SysStringLen(strs[i]);
+            memcpy(ptr, strs[i], l*sizeof(WCHAR));
+            ptr += l;
+        }
+    }
+
+    for(i=0; i < str_cnt; i++)
+        SysFreeString(strs[i]);
+    heap_free(strs);
+
+    if(FAILED(hres))
+        return hres;
+
+    if(retv) {
+        V_VT(retv) = VT_BSTR;
+        V_BSTR(retv) = ret;
+    }else {
+        SysFreeString(ret);
+    }
+    return S_OK;
 }
 
 static HRESULT String_fixed(DispatchEx *dispex, LCID lcid, WORD flags, DISPPARAMS *dp,

dlls/jscript/tests/api.js

@@ -133,6 +133,13 @@ ok(tmp === "abcd", "'abcd'.slice() = " + tmp);
 tmp = "abcd".slice(1);
 ok(tmp === "bcd", "'abcd'.slice(1) = " + tmp);
 
+tmp = "abc".concat(["d",1],2,false);
+ok(tmp === "abcd,12false", "concat returned " + tmp);
+var arr = new Array(2,"a");
+arr.concat = String.prototype.concat;
+tmp = arr.concat("d");
+ok(tmp === "2,ad", "arr.concat = " + tmp);
+
 var arr = new Array();
 ok(typeof(arr) === "object", "arr () is not object");
 ok((arr.length === 0), "arr.length is not 0");