1 /****************************************************************************** 2 * Copyright (c) 2022 Telink Semiconductor (Shanghai) Co., Ltd. ("TELINK") 3 * All rights reserved. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 *****************************************************************************/ 18 19 #pragma once 20 21 // more complicated version canbe used anywhere in the source 22 #define STATIC_ASSERT_M(COND, MSG) typedef char static_assertion_##MSG[(!!(COND)) * 2 - 1] 23 // token pasting madness: 24 #define STATIC_ASSERT3(X, L) STATIC_ASSERT_M(X, static_assertion_at_line_##L) 25 #define STATIC_ASSERT2(X, L) STATIC_ASSERT3(X, L) 26 27 #define STATIC_ASSERT(X) STATIC_ASSERT2(X, __LINE__) 28 29 #define STATIC_ASSERT_POW2(expr) STATIC_ASSERT(!((expr) & ((expr)-1))) // assert expr is 2**N 30 #define STATIC_ASSERT_EVEN(expr) STATIC_ASSERT(!((expr)&1)) 31 #define STATIC_ASSERT_ODD(expr) STATIC_ASSERT(((expr)&1)) 32 #define STATIC_ASSERT_INT_DIV(a, b) STATIC_ASSERT((a) / (b) * (b) == (a)) 33