/* SPDX-License-Identifier: MIT */ /* * Copyright © 2023 Intel Corporation */ #ifndef _XE_RTP_HELPERS_ #define _XE_RTP_HELPERS_ #ifndef _XE_RTP_INCLUDE_PRIVATE_HELPERS #error "This header is supposed to be included by xe_rtp.h only" #endif /* * Helper macros - not to be used outside this header. */ #define _XE_ESC(...) __VA_ARGS__ #define _XE_COUNT_ARGS(...) _XE_ESC(__XE_COUNT_ARGS(__VA_ARGS__, 5, 4, 3, 2, 1,)) #define __XE_COUNT_ARGS(_, _5, _4, _3, _2, X_, ...) X_ #define _XE_FIRST(...) _XE_ESC(__XE_FIRST(__VA_ARGS__,)) #define __XE_FIRST(x_, ...) x_ #define _XE_TUPLE_TAIL(...) _XE_ESC(__XE_TUPLE_TAIL(__VA_ARGS__)) #define __XE_TUPLE_TAIL(x_, ...) (__VA_ARGS__) #define _XE_DROP_FIRST(x_, ...) __VA_ARGS__ #define _XE_RTP_CONCAT(a, b) __XE_RTP_CONCAT(a, b) #define __XE_RTP_CONCAT(a, b) XE_RTP_ ## a ## b #define __XE_RTP_PASTE_SEP_COMMA , #define __XE_RTP_PASTE_SEP_BITWISE_OR | /* * XE_RTP_PASTE_FOREACH - Paste XE_RTP_<@prefix_> on each element of the tuple * @args, with the end result separated by @sep_. @sep must be one of the * previously declared macros __XE_RTP_PASTE_SEP_*, or declared with such * prefix. * * Examples: * * 1) XE_RTP_PASTE_FOREACH(TEST_, COMMA, (FOO, BAR)) * expands to: * * XE_RTP_TEST_FOO , XE_RTP_TEST_BAR * * 2) XE_RTP_PASTE_FOREACH(TEST2_, COMMA, (FOO)) * expands to: * * XE_RTP_TEST2_FOO * * 3) XE_RTP_PASTE_FOREACH(TEST3, BITWISE_OR, (FOO, BAR)) * expands to: * * XE_RTP_TEST3_FOO | XE_RTP_TEST3_BAR * * 4) #define __XE_RTP_PASTE_SEP_MY_SEP BANANA * XE_RTP_PASTE_FOREACH(TEST_, MY_SEP, (FOO, BAR)) * expands to: * * XE_RTP_TEST_FOO BANANA XE_RTP_TEST_BAR */ #define XE_RTP_PASTE_FOREACH(prefix_, sep_, args_) _XE_ESC(_XE_RTP_CONCAT(PASTE_, _XE_COUNT_ARGS args_)(prefix_, sep_, args_)) #define XE_RTP_PASTE_1(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) #define XE_RTP_PASTE_2(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_1(prefix_, sep_, _XE_TUPLE_TAIL args_) #define XE_RTP_PASTE_3(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_2(prefix_, sep_, _XE_TUPLE_TAIL args_) #define XE_RTP_PASTE_4(prefix_, sep_, args_) _XE_RTP_CONCAT(prefix_, _XE_FIRST args_) __XE_RTP_PASTE_SEP_ ## sep_ XE_RTP_PASTE_3(prefix_, sep_, _XE_TUPLE_TAIL args_) /* * XE_RTP_DROP_CAST - Drop cast to convert a compound statement to a initializer * * Example: * * #define foo(a_) ((struct foo){ .a = a_ }) * XE_RTP_DROP_CAST(foo(10)) * expands to: * * { .a = 10 } */ #define XE_RTP_DROP_CAST(...) _XE_ESC(_XE_DROP_FIRST _XE_ESC __VA_ARGS__) #endif