49 lines
1.9 KiB
C
49 lines
1.9 KiB
C
/* Macro for checking that a function declaration is compliant.
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Copyright (C) 2009-2021 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifndef SIGNATURE_CHECK
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/* Check that the function FN takes the specified arguments ARGS with
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a return type of RET. This header is designed to be included after
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<config.h> and the one system header that is supposed to contain
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the function being checked, but prior to any other system headers
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that are necessary for the unit test. Therefore, this file does
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not include any system headers, nor reference anything outside of
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the macro arguments. For an example, if foo.h should provide:
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extern int foo (char, float);
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then the unit test named test-foo.c would start out with:
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#include <config.h>
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#include <foo.h>
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#include "signature.h"
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SIGNATURE_CHECK (foo, int, (char, float));
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#include <other.h>
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...
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*/
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# define SIGNATURE_CHECK(fn, ret, args) \
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SIGNATURE_CHECK1 (fn, ret, args, __LINE__)
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/* Necessary to allow multiple SIGNATURE_CHECK lines in a unit test.
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Note that the checks must not occupy the same line. */
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# define SIGNATURE_CHECK1(fn, ret, args, id) \
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SIGNATURE_CHECK2 (fn, ret, args, id) /* macroexpand line */
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# define SIGNATURE_CHECK2(fn, ret, args, id) \
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static ret (* _GL_UNUSED signature_check ## id) args = fn
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#endif /* SIGNATURE_CHECK */
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