/******************************************************************************
 * Copyright (c) 2022 Telink Semiconductor (Shanghai) Co., Ltd. ("TELINK")
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *****************************************************************************/

#pragma once

// more complicated version canbe used anywhere in the source
#define STATIC_ASSERT_M(COND, MSG) typedef char static_assertion_##MSG[(!!(COND)) * 2 - 1]
// token pasting madness:
#define STATIC_ASSERT3(X, L) STATIC_ASSERT_M(X, static_assertion_at_line_##L)
#define STATIC_ASSERT2(X, L) STATIC_ASSERT3(X, L)

#define STATIC_ASSERT(X) STATIC_ASSERT2(X, __LINE__)

#define STATIC_ASSERT_POW2(expr)    STATIC_ASSERT(!((expr) & ((expr)-1)))  //  assert  expr  is  2**N
#define STATIC_ASSERT_EVEN(expr)    STATIC_ASSERT(!((expr)&1))
#define STATIC_ASSERT_ODD(expr)     STATIC_ASSERT(((expr)&1))
#define STATIC_ASSERT_INT_DIV(a, b) STATIC_ASSERT((a) / (b) * (b) == (a))