141 lines
8.3 KiB
C
141 lines
8.3 KiB
C
/****************************************************************************
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* include/nuttx/macro.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_MACRO_H
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#define __INCLUDE_NUTTX_MACRO_H
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define GET_ARG_VALUE(_00, _01, _02, _03, _04, _05, _06, _07, \
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_08, _09, _10, _11, _12, _13, _14, _15, \
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_16, _17, _18, _19, _20, _21, _22, _23, \
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_24, _25, _26, _27, _28, _29, _30, _31, \
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_32, name, ...) name
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/* Get the number of arguments (up to 32) */
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#define GET_ARG_COUNT(...) \
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GET_ARG_VALUE(_0, ##__VA_ARGS__, 32, 31, 30, \
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29, 28, 27, 26, 25, 24, 23, 22, 21, 20, \
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19, 18, 17, 16, 15, 14, 13, 12, 11, 10, \
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9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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/* Reverse the arguments */
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#define EXPAND(x) x
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#define REVERSE_00()
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#define REVERSE_01(a) a
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#define REVERSE_02(a,b) b,a
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#define REVERSE_03(a,...) EXPAND(REVERSE_02(__VA_ARGS__)),a
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#define REVERSE_04(a,...) EXPAND(REVERSE_03(__VA_ARGS__)),a
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#define REVERSE_05(a,...) EXPAND(REVERSE_04(__VA_ARGS__)),a
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#define REVERSE_06(a,...) EXPAND(REVERSE_05(__VA_ARGS__)),a
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#define REVERSE_07(a,...) EXPAND(REVERSE_06(__VA_ARGS__)),a
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#define REVERSE_08(a,...) EXPAND(REVERSE_07(__VA_ARGS__)),a
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#define REVERSE_09(a,...) EXPAND(REVERSE_08(__VA_ARGS__)),a
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#define REVERSE_10(a,...) EXPAND(REVERSE_09(__VA_ARGS__)),a
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#define REVERSE_11(a,...) EXPAND(REVERSE_10(__VA_ARGS__)),a
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#define REVERSE_12(a,...) EXPAND(REVERSE_11(__VA_ARGS__)),a
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#define REVERSE_13(a,...) EXPAND(REVERSE_12(__VA_ARGS__)),a
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#define REVERSE_14(a,...) EXPAND(REVERSE_13(__VA_ARGS__)),a
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#define REVERSE_15(a,...) EXPAND(REVERSE_14(__VA_ARGS__)),a
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#define REVERSE_16(a,...) EXPAND(REVERSE_15(__VA_ARGS__)),a
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#define REVERSE_17(a,...) EXPAND(REVERSE_16(__VA_ARGS__)),a
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#define REVERSE_18(a,...) EXPAND(REVERSE_17(__VA_ARGS__)),a
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#define REVERSE_19(a,...) EXPAND(REVERSE_18(__VA_ARGS__)),a
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#define REVERSE_20(a,...) EXPAND(REVERSE_19(__VA_ARGS__)),a
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#define REVERSE_21(a,...) EXPAND(REVERSE_20(__VA_ARGS__)),a
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#define REVERSE_22(a,...) EXPAND(REVERSE_21(__VA_ARGS__)),a
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#define REVERSE_23(a,...) EXPAND(REVERSE_22(__VA_ARGS__)),a
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#define REVERSE_24(a,...) EXPAND(REVERSE_23(__VA_ARGS__)),a
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#define REVERSE_25(a,...) EXPAND(REVERSE_24(__VA_ARGS__)),a
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#define REVERSE_26(a,...) EXPAND(REVERSE_25(__VA_ARGS__)),a
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#define REVERSE_27(a,...) EXPAND(REVERSE_26(__VA_ARGS__)),a
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#define REVERSE_28(a,...) EXPAND(REVERSE_27(__VA_ARGS__)),a
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#define REVERSE_29(a,...) EXPAND(REVERSE_28(__VA_ARGS__)),a
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#define REVERSE_30(a,...) EXPAND(REVERSE_29(__VA_ARGS__)),a
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#define REVERSE_31(a,...) EXPAND(REVERSE_30(__VA_ARGS__)),a
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#define REVERSE_32(a,...) EXPAND(REVERSE_31(__VA_ARGS__)),a
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#define REVERSE_ARG_(...) \
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GET_ARG_VALUE(0, ##__VA_ARGS__, \
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REVERSE_32, REVERSE_31, REVERSE_30, REVERSE_29, REVERSE_28, REVERSE_27, \
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REVERSE_26, REVERSE_25, REVERSE_24, REVERSE_23, REVERSE_22, REVERSE_21, \
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REVERSE_20, REVERSE_19, REVERSE_18, REVERSE_17, REVERSE_16, REVERSE_15, \
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REVERSE_14, REVERSE_13, REVERSE_12, REVERSE_11, REVERSE_10, REVERSE_09, \
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REVERSE_08, REVERSE_07, REVERSE_06, REVERSE_05, REVERSE_04, REVERSE_03, \
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REVERSE_02, REVERSE_01, REVERSE_00)(__VA_ARGS__)
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#define REVERSE_ARG(...) REVERSE_ARG_(##__VA_ARGS__)
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/* Apply the macro to each argument */
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#define FOREACH_00(action, count, ...) 0
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#define FOREACH_01(action, count, arg, ...) action(arg, count - 1 )
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#define FOREACH_02(action, count, arg, ...) action(arg, count - 2 ) FOREACH_01(action, count, __VA_ARGS__)
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#define FOREACH_03(action, count, arg, ...) action(arg, count - 3 ) FOREACH_02(action, count, __VA_ARGS__)
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#define FOREACH_04(action, count, arg, ...) action(arg, count - 4 ) FOREACH_03(action, count, __VA_ARGS__)
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#define FOREACH_05(action, count, arg, ...) action(arg, count - 5 ) FOREACH_04(action, count, __VA_ARGS__)
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#define FOREACH_06(action, count, arg, ...) action(arg, count - 6 ) FOREACH_05(action, count, __VA_ARGS__)
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#define FOREACH_07(action, count, arg, ...) action(arg, count - 7 ) FOREACH_06(action, count, __VA_ARGS__)
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#define FOREACH_08(action, count, arg, ...) action(arg, count - 8 ) FOREACH_07(action, count, __VA_ARGS__)
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#define FOREACH_09(action, count, arg, ...) action(arg, count - 9 ) FOREACH_08(action, count, __VA_ARGS__)
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#define FOREACH_10(action, count, arg, ...) action(arg, count - 10) FOREACH_09(action, count, __VA_ARGS__)
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#define FOREACH_11(action, count, arg, ...) action(arg, count - 11) FOREACH_10(action, count, __VA_ARGS__)
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#define FOREACH_12(action, count, arg, ...) action(arg, count - 12) FOREACH_11(action, count, __VA_ARGS__)
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#define FOREACH_13(action, count, arg, ...) action(arg, count - 13) FOREACH_12(action, count, __VA_ARGS__)
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#define FOREACH_14(action, count, arg, ...) action(arg, count - 14) FOREACH_13(action, count, __VA_ARGS__)
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#define FOREACH_15(action, count, arg, ...) action(arg, count - 15) FOREACH_14(action, count, __VA_ARGS__)
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#define FOREACH_16(action, count, arg, ...) action(arg, count - 16) FOREACH_15(action, count, __VA_ARGS__)
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#define FOREACH_17(action, count, arg, ...) action(arg, count - 17) FOREACH_16(action, count, __VA_ARGS__)
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#define FOREACH_18(action, count, arg, ...) action(arg, count - 18) FOREACH_17(action, count, __VA_ARGS__)
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#define FOREACH_19(action, count, arg, ...) action(arg, count - 19) FOREACH_18(action, count, __VA_ARGS__)
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#define FOREACH_20(action, count, arg, ...) action(arg, count - 20) FOREACH_19(action, count, __VA_ARGS__)
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#define FOREACH_21(action, count, arg, ...) action(arg, count - 21) FOREACH_20(action, count, __VA_ARGS__)
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#define FOREACH_22(action, count, arg, ...) action(arg, count - 22) FOREACH_21(action, count, __VA_ARGS__)
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#define FOREACH_23(action, count, arg, ...) action(arg, count - 23) FOREACH_22(action, count, __VA_ARGS__)
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#define FOREACH_24(action, count, arg, ...) action(arg, count - 24) FOREACH_23(action, count, __VA_ARGS__)
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#define FOREACH_25(action, count, arg, ...) action(arg, count - 25) FOREACH_24(action, count, __VA_ARGS__)
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#define FOREACH_26(action, count, arg, ...) action(arg, count - 26) FOREACH_25(action, count, __VA_ARGS__)
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#define FOREACH_27(action, count, arg, ...) action(arg, count - 27) FOREACH_26(action, count, __VA_ARGS__)
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#define FOREACH_28(action, count, arg, ...) action(arg, count - 28) FOREACH_27(action, count, __VA_ARGS__)
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#define FOREACH_29(action, count, arg, ...) action(arg, count - 29) FOREACH_28(action, count, __VA_ARGS__)
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#define FOREACH_30(action, count, arg, ...) action(arg, count - 30) FOREACH_29(action, count, __VA_ARGS__)
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#define FOREACH_31(action, count, arg, ...) action(arg, count - 31) FOREACH_30(action, count, __VA_ARGS__)
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#define FOREACH_32(action, count, arg, ...) action(arg, count - 32) FOREACH_31(action, count, __VA_ARGS__)
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#define FOREACH_ARG_(action, count, ...) \
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GET_ARG_VALUE(0, ##__VA_ARGS__, \
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FOREACH_32, FOREACH_31, FOREACH_30, FOREACH_29, FOREACH_28, FOREACH_27, \
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FOREACH_26, FOREACH_25, FOREACH_24, FOREACH_23, FOREACH_22, FOREACH_21, \
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FOREACH_20, FOREACH_19, FOREACH_18, FOREACH_17, FOREACH_16, FOREACH_15, \
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FOREACH_14, FOREACH_13, FOREACH_12, FOREACH_11, FOREACH_10, FOREACH_09, \
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FOREACH_08, FOREACH_07, FOREACH_06, FOREACH_05, FOREACH_04, FOREACH_03, \
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FOREACH_02, FOREACH_01, FOREACH_00)(action, count, ##__VA_ARGS__)
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#define FOREACH_ARG(action, ...) \
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FOREACH_ARG_(action, GET_ARG_COUNT(__VA_ARGS__), ##__VA_ARGS__)
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#endif /* __INCLUDE_NUTTX_MACRO_H */
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