Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Michal Wajdeczko | 212 | 100.00% | 2 | 100.00% |
Total | 212 | 2 |
/* SPDX-License-Identifier: MIT */ /* * Copyright © 2024 Intel Corporation */ #ifndef _XE_ARGS_H_ #define _XE_ARGS_H_ #include <linux/args.h> /* * Why don't the following macros have the XE prefix? * * Once we find more potential users outside of the Xe driver, we plan to move * all of the following macros unchanged to linux/args.h. */ /** * CALL_ARGS - Invoke a macro, but allow parameters to be expanded beforehand. * @f: name of the macro to invoke * @args: arguments for the macro * * This macro allows calling macros which names might generated or we want to * make sure it's arguments will be correctly expanded. * * Example: * * #define foo X,Y,Z,Q * #define bar COUNT_ARGS(foo) * #define buz CALL_ARGS(COUNT_ARGS, foo) * * With above definitions bar expands to 1 while buz expands to 4. */ #define CALL_ARGS(f, args...) __CALL_ARGS(f, args) #define __CALL_ARGS(f, args...) f(args) /** * DROP_FIRST_ARG - Returns all arguments except the first one. * @args: arguments * * This helper macro allows manipulation the argument list before passing it * to the next level macro. * * Example: * * #define foo X,Y,Z,Q * #define bar CALL_ARGS(COUNT_ARGS, DROP_FIRST_ARG(foo)) * * With above definitions bar expands to 3. */ #define DROP_FIRST_ARG(args...) __DROP_FIRST_ARG(args) #define __DROP_FIRST_ARG(a, b...) b /** * FIRST_ARG - Returns the first argument. * @args: arguments * * This helper macro allows manipulation the argument list before passing it * to the next level macro. * * Example: * * #define foo X,Y,Z,Q * #define bar FIRST_ARG(foo) * * With above definitions bar expands to X. */ #define FIRST_ARG(args...) __FIRST_ARG(args) #define __FIRST_ARG(a, b...) a /** * LAST_ARG - Returns the last argument. * @args: arguments * * This helper macro allows manipulation the argument list before passing it * to the next level macro. * * Like COUNT_ARGS() this macro works up to 12 arguments. * * Example: * * #define foo X,Y,Z,Q * #define bar LAST_ARG(foo) * * With above definitions bar expands to Q. */ #define LAST_ARG(args...) __LAST_ARG(args) #define __LAST_ARG(args...) PICK_ARG(COUNT_ARGS(args), args) /** * PICK_ARG - Returns the n-th argument. * @n: argument number to be returned * @args: arguments * * This helper macro allows manipulation the argument list before passing it * to the next level macro. * * Like COUNT_ARGS() this macro supports n up to 12. * Specialized macros PICK_ARG1() to PICK_ARG12() are also available. * * Example: * * #define foo X,Y,Z,Q * #define bar PICK_ARG(2, foo) * #define buz PICK_ARG3(foo) * * With above definitions bar expands to Y and buz expands to Z. */ #define PICK_ARG(n, args...) __PICK_ARG(n, args) #define __PICK_ARG(n, args...) CALL_ARGS(CONCATENATE(PICK_ARG, n), args) #define PICK_ARG1(args...) FIRST_ARG(args) #define PICK_ARG2(args...) PICK_ARG1(DROP_FIRST_ARG(args)) #define PICK_ARG3(args...) PICK_ARG2(DROP_FIRST_ARG(args)) #define PICK_ARG4(args...) PICK_ARG3(DROP_FIRST_ARG(args)) #define PICK_ARG5(args...) PICK_ARG4(DROP_FIRST_ARG(args)) #define PICK_ARG6(args...) PICK_ARG5(DROP_FIRST_ARG(args)) #define PICK_ARG7(args...) PICK_ARG6(DROP_FIRST_ARG(args)) #define PICK_ARG8(args...) PICK_ARG7(DROP_FIRST_ARG(args)) #define PICK_ARG9(args...) PICK_ARG8(DROP_FIRST_ARG(args)) #define PICK_ARG10(args...) PICK_ARG9(DROP_FIRST_ARG(args)) #define PICK_ARG11(args...) PICK_ARG10(DROP_FIRST_ARG(args)) #define PICK_ARG12(args...) PICK_ARG11(DROP_FIRST_ARG(args)) /** * ARGS_SEP_COMMA - Definition of a comma character. * * This definition can be used in cases where any intermediate macro expects * fixed number of arguments, but we want to pass more arguments which can * be properly evaluated only by the next level macro. * * Example: * * #define foo(f) f(X) f(Y) f(Z) f(Q) * #define bar DROP_FIRST_ARG(foo(ARGS_SEP_COMMA __stringify)) * #define buz CALL_ARGS(COUNT_ARGS, DROP_FIRST_ARG(foo(ARGS_SEP_COMMA))) * * With above definitions bar expands to * "X", "Y", "Z", "Q" * and buz expands to 4. */ #define ARGS_SEP_COMMA , #endif
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