1/* Macro for checking that a function declaration is compliant. 2 Copyright (C) 2009, 2010 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17#ifndef SIGNATURE_CHECK 18 19/* Check that the function FN takes the specified arguments ARGS with 20 a return type of RET. This header is designed to be included after 21 <config.h> and the one system header that is supposed to contain 22 the function being checked, but prior to any other system headers 23 that are necessary for the unit test. Therefore, this file does 24 not include any system headers, nor reference anything outside of 25 the macro arguments. For an example, if foo.h should provide: 26 27 extern int foo (char, float); 28 29 then the unit test named test-foo.c would start out with: 30 31 #include <config.h> 32 #include <foo.h> 33 #include "signature.h" 34 SIGNATURE_CHECK (foo, int, (char, float)); 35 #include <other.h> 36 ... 37*/ 38# define SIGNATURE_CHECK(fn, ret, args) \ 39 SIGNATURE_CHECK1 (fn, ret, args, __LINE__) 40 41/* Necessary to allow multiple SIGNATURE_CHECK lines in a unit test. 42 Note that the checks must not occupy the same line. */ 43# define SIGNATURE_CHECK1(fn, ret, args, id) \ 44 SIGNATURE_CHECK2 (fn, ret, args, id) /* macroexpand line */ 45# define SIGNATURE_CHECK2(fn, ret, args, id) \ 46 static ret (* _GL_UNUSED signature_check ## id) args = fn 47 48#endif /* SIGNATURE_CHECK */ 49