1 /** 2 * \file 3 * 4 * \brief Recursion macro. 5 * 6 * Copyright (C) 2014 Atmel Corporation. All rights reserved. 7 * 8 * \asf_license_start 9 * 10 * \page License 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions are met: 14 * 15 * 1. Redistributions of source code must retain the above copyright notice, 16 * this list of conditions and the following disclaimer. 17 * 18 * 2. Redistributions in binary form must reproduce the above copyright notice, 19 * this list of conditions and the following disclaimer in the documentation 20 * and/or other materials provided with the distribution. 21 * 22 * 3. The name of Atmel may not be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * 4. This software may only be redistributed and used in connection with an 26 * Atmel microcontroller product. 27 * 28 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED 29 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 30 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 31 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR 32 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 36 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 37 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 38 * POSSIBILITY OF SUCH DAMAGE. 39 * 40 * \asf_license_stop 41 * 42 */ 43 44 #ifndef _UTILS_RECURSION_MACRO_H 45 #define _UTILS_RECURSION_MACRO_H 46 47 #ifdef __cplusplus 48 extern "C" { 49 #endif 50 51 /* 52 * \brief Macro recursion 53 * 54 * \param[in] macro Macro to be repeated recursively 55 * \param[in] arg A recursive threshold, building on this to decline by times 56 * defined with parameter n 57 * \param[in] n The number of repetitious calls to macro 58 */ 59 #define RECURSION_MACRO(macro, arg, n) RECURSION_MACRO_I(macro, arg, n) 60 61 /* 62 * \brief Second level is needed to get integer literal from "n" if it is 63 * defined as macro 64 */ 65 #define RECURSION_MACRO_I(macro, arg, n) RECURSION##n(macro, arg) 66 67 #define RECURSION0(macro, arg) 68 #define RECURSION1(macro, arg) RECURSION0(macro, DEC_VALUE(arg)) macro(arg, 0) 69 #define RECURSION2(macro, arg) RECURSION1(macro, DEC_VALUE(arg)) macro(arg, 1) 70 #define RECURSION3(macro, arg) RECURSION2(macro, DEC_VALUE(arg)) macro(arg, 2) 71 #define RECURSION4(macro, arg) RECURSION3(macro, DEC_VALUE(arg)) macro(arg, 3) 72 #define RECURSION5(macro, arg) RECURSION4(macro, DEC_VALUE(arg)) macro(arg, 4) 73 74 #ifdef __cplusplus 75 } 76 #endif 77 78 #include <utils_decrement_macro.h> 79 #endif /* _UTILS_RECURSION_MACRO_H */ 80
