mirror of https://gitee.com/openkylin/wget.git
61 lines
2.3 KiB
C
61 lines
2.3 KiB
C
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/* MIN, MAX macros.
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Copyright (C) 1995, 1998, 2001, 2003, 2005, 2009-2019 Free Software
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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, or (at your option)
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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 _MINMAX_H
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#define _MINMAX_H
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/* Note: MIN, MAX are also defined in <sys/param.h> on some systems
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(glibc, IRIX, HP-UX, OSF/1). Therefore you might get warnings about
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MIN, MAX macro redefinitions on some systems; the workaround is to
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#include this file as the last one among the #include list. */
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/* Before we define the following symbols we get the <limits.h> file
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since otherwise we get redefinitions on some systems if <limits.h> is
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included after this file. Likewise for <sys/param.h>.
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If more than one of these system headers define MIN and MAX, pick just
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one of the headers (because the definitions most likely are the same). */
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#if HAVE_MINMAX_IN_LIMITS_H
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# include <limits.h>
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#elif HAVE_MINMAX_IN_SYS_PARAM_H
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# include <sys/param.h>
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#endif
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/* Note: MIN and MAX should be used with two arguments of the
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same type. They might not return the minimum and maximum of their two
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arguments, if the arguments have different types or have unusual
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floating-point values. For example, on a typical host with 32-bit 'int',
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64-bit 'long long', and 64-bit IEEE 754 'double' types:
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MAX (-1, 2147483648) returns 4294967295.
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MAX (9007199254740992.0, 9007199254740993) returns 9007199254740992.0.
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MAX (NaN, 0.0) returns 0.0.
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MAX (+0.0, -0.0) returns -0.0.
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and in each case the answer is in some sense bogus. */
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/* MAX(a,b) returns the maximum of A and B. */
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#ifndef MAX
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# define MAX(a,b) ((a) > (b) ? (a) : (b))
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#endif
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/* MIN(a,b) returns the minimum of A and B. */
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#ifndef MIN
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# define MIN(a,b) ((a) < (b) ? (a) : (b))
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#endif
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#endif /* _MINMAX_H */
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