jscript: Added String function implementation.

dlls/jscript/string.c

@@ -772,7 +772,26 @@ static HRESULT StringConstr_value(DispatchEx *dispex, LCID lcid, WORD flags, DIS
 {
     HRESULT hres;
 
+    TRACE("\n");
+
     switch(flags) {
+    case INVOKE_FUNC: {
+        BSTR str;
+
+        if(arg_cnt(dp)) {
+            hres = to_string(dispex->ctx, get_arg(dp, 0), ei, &str);
+            if(FAILED(hres))
+                return hres;
+        }else {
+            str = SysAllocStringLen(NULL, 0);
+            if(!str)
+                return E_OUTOFMEMORY;
+        }
+
+        V_VT(retv) = VT_BSTR;
+        V_BSTR(retv) = str;
+        break;
+    }
     case DISPATCH_CONSTRUCT: {
         DispatchEx *ret;
 

dlls/jscript/tests/api.js

@@ -69,6 +69,17 @@ ok(str.toString() === "test", "str.toString() = " + str.toString());
 tmp = "value " + str;
 ok(tmp === "value test", "'value ' + str = " + tmp);
 
+tmp = String();
+ok(tmp === "", "String() = " + tmp);
+tmp = String(false);
+ok(tmp === "false", "String(false) = " + tmp);
+tmp = String(null);
+ok(tmp === "null", "String(null) = " + tmp);
+tmp = String("test");
+ok(tmp === "test", "String('test') = " + tmp);
+tmp = String("test", "abc");
+ok(tmp === "test", "String('test','abc') = " + tmp);
+
 tmp = "abc".charAt(0);
 ok(tmp === "a", "'abc',charAt(0) = " + tmp);
 tmp = "abc".charAt(1);