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/* 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
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