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Collin Funk
52 lines
1.6 KiB
C
52 lines
1.6 KiB
C
/* Arithmetic.
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Copyright (C) 2001-2002, 2006, 2009-2026 Free Software Foundation, Inc.
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Written by Bruno Haible <bruno@clisp.org>, 2001.
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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 _GCD_H
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#define _GCD_H
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/* Before including this file, you may define:
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GCD_WORD_T The parameter type and result type of the gcd function.
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It should be an unsigned integer type that is either
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a built-in type or defined in <stddef.h> or <stdint.h>.
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The definition of GCD_WORD_T needs to be the same across the entire
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application. Therefore it is best placed in <config.h>.
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*/
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#ifdef GCD_WORD_T
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/* Make sure that GCD_WORD_T is defined as a type. */
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# include <stddef.h>
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# include <stdint.h>
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#else
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# define GCD_WORD_T unsigned long
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Return the greatest common divisor of a > 0 and b > 0. */
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extern GCD_WORD_T gcd (GCD_WORD_T a, GCD_WORD_T b);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _GCD_H */
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