C++ MutableHandleValue::setString方法代码示例

/**
 * gjs_string_from_ucs4:
 * @cx: a #JSContext
 * @ucs4_string: string of #gunichar
 * @n_chars: number of characters in @ucs4_string or -1 for zero-terminated
 * @value_p: JS::Value that will be filled with a string
 *
 * Returns: true on success, false otherwise in which case a JS error is thrown
 */
bool
gjs_string_from_ucs4(JSContext             *cx,
                     const gunichar        *ucs4_string,
                     ssize_t                n_chars,
                     JS::MutableHandleValue value_p)
{
    long u16_string_length;
    GError *error = NULL;

    char16_t *u16_string =
        reinterpret_cast<char16_t *>(g_ucs4_to_utf16(ucs4_string, n_chars, NULL,
                                                     &u16_string_length, &error));
    if (!u16_string) {
        gjs_throw(cx, "Failed to convert UCS-4 string to UTF-16: %s",
                  error->message);
        g_error_free(error);
        return false;
    }

    JSAutoRequest ar(cx);
    /* Avoid a copy - assumes that g_malloc == js_malloc == malloc */
    JS::RootedString str(cx, JS_NewUCString(cx, u16_string, u16_string_length));

    if (!str) {
        gjs_throw(cx, "Failed to convert UCS-4 string to UTF-16");
        return false;
    }

    value_p.setString(str);
    return true;
}

bool JSGlobal::JSGetter___dirname(JSContext *cx, JS::MutableHandleValue vp)
{
    Path path(JSUtils::CurrentJSCaller(cx), false, true);
    vp.setString(JS_NewStringCopyZ(cx, path.dir()));

    return true;
}

bool JSGlobal::JSGetter___filename(JSContext *cx, JS::MutableHandleValue vp)
{
    char *filename = JSUtils::CurrentJSCaller(cx);
    vp.setString(JS_NewStringCopyZ(cx, filename));
    free(filename);

    return true;
}

template<> void ScriptInterface::ToJSVal<const char*>(JSContext* cx, JS::MutableHandleValue ret, const char* const& val)
{
	JSAutoRequest rq(cx);
	JS::RootedString str(cx, JS_NewStringCopyZ(cx, val));
	if (str)
		ret.setString(str);
	else
		ret.setUndefined();
}

CEXPORT bool def_timestep_image_map_get_url(JSContext *cx, JS::HandleObject obj, JS::HandleId id, JS::MutableHandleValue vp) {
	JS_BeginRequest(cx);
	timestep_image_map *thiz = (timestep_image_map*)JS_GetPrivate(obj.get());
	if (thiz) {
		
		vp.setString(JS_NewStringCopyZ(cx, thiz->url));

		
	}
	JS_EndRequest(cx);
	return true;
}

void IdWrapper::toValue(JS::MutableHandleValue value) const {
    if (isInt()) {
        value.setInt32(toInt32());
        return;
    }

    if (isString()) {
        auto str = JSID_TO_STRING(_value);
        value.setString(str);
        return;
    }

    uasserted(ErrorCodes::BadValue, "Failed to toValue() non-string and non-integer jsid");
}

bool
gjs_string_from_utf8(JSContext             *context,
                     const char            *utf8_string,
                     JS::MutableHandleValue value_p)
{
    JS_BeginRequest(context);

    JS::ConstUTF8CharsZ chars(utf8_string, strlen(utf8_string));
    JS::RootedString str(context, JS_NewStringCopyUTF8Z(context, chars));
    if (str)
        value_p.setString(str);

    JS_EndRequest(context);
    return str != nullptr;
}

bool
gjs_string_from_utf8(JSContext             *context,
                     const char            *utf8_string,
                     ssize_t                n_bytes,
                     JS::MutableHandleValue value_p)
{
    char16_t *u16_string;
    glong u16_string_length;
    GError *error;

    /* intentionally using n_bytes even though glib api suggests n_chars; with
    * n_chars (from g_utf8_strlen()) the result appears truncated
    */

    error = NULL;
    u16_string =
        reinterpret_cast<char16_t *>(g_utf8_to_utf16(utf8_string, n_bytes, NULL,
                                                     &u16_string_length, &error));
    if (!u16_string) {
        gjs_throw(context,
                  "Failed to convert UTF-8 string to "
                  "JS string: %s",
                  error->message);
                  g_error_free(error);
        return false;
    }

    JS_BeginRequest(context);

    /* Avoid a copy - assumes that g_malloc == js_malloc == malloc */
    JS::RootedString str(context,
                         JS_NewUCString(context, u16_string, u16_string_length));
    if (str)
        value_p.setString(str);

    JS_EndRequest(context);
    return str != NULL;
}

static void
convertValue(JSContext *             jct,
             JS::MutableHandleValue  theData,
             const yarp::os::Value & inputValue)
{
    ODL_ENTER(); //####
    ODL_P2("jct = ", jct, "inputValue = ", &inputValue); //####
    if (inputValue.isBool())
    {
        theData.setBoolean(inputValue.asBool());
    }
    else if (inputValue.isInt())
    {
        theData.setInt32(inputValue.asInt());
    }
    else if (inputValue.isString())
    {
        YarpString value = inputValue.asString();
        JSString * aString = JS_NewStringCopyZ(jct, value.c_str());

        if (aString)
        {
            theData.setString(aString);
        }
    }
    else if (inputValue.isDouble())
    {
        theData.setDouble(inputValue.asDouble());
    }
    else if (inputValue.isDict())
    {
        yarp::os::Property * value = inputValue.asDict();

        if (value)
        {
            yarp::os::Bottle asList(value->toString());

            convertDictionary(jct, theData, asList);
        }
    }
    else if (inputValue.isList())
    {
        yarp::os::Bottle * value = inputValue.asList();

        if (value)
        {
            yarp::os::Property asDict;

            if (ListIsReallyDictionary(*value, asDict))
            {
                convertDictionary(jct, theData, *value);
            }
            else
            {
                convertList(jct, theData, *value);
            }
        }
    }
    else
    {
        // We don't know what to do with this...
        theData.setNull();
    }
    ODL_EXIT(); //####
} // convertValue