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annotate lib/isnand-nolibm.h @ 17101:99fa3b05f1c8

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pipe-filter-gi, pipe-filter-ii: better use of 'inline' * lib/pipe-filter-aux.c: New file. * lib/pipe-filter-aux.h (PIPE_FILTER_AUX_INLINE): New macro. Replace all uses of 'static inline' with it. Use _GL_INLINE_HEADER_BEGIN, _GL_INLINE_HEADER_END. * lib/pipe-filter-gi.c (filter_init, filter_cleanup) (filter_retcode): No real need for inline here. * modules/pipe-filter-gi, modules/pipe-filter-ii: (Files): Add lib/pipe-filter-aux.c. (Depends-on): Add extern-inline. (configure.ac): Do not require AC_C_INLINE. (lib_SOURCES): Add pipe-filter-aux.c.
author Paul Eggert <eggert@cs.ucla.edu>
date Wed, 29 Aug 2012 22:17:49 -0700
parents 8250f2777afc
children e542fd46ad6f
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ebb7ea0c94e8 Rename isnand.h to isnand-nolibm.h, similarly for isnanf.h.
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1 /* Test for NaN that does not need libm.
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Jim Meyering <meyering@redhat.com>
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2 Copyright (C) 2007-2012 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
ebb7ea0c94e8 Rename isnand.h to isnand-nolibm.h, similarly for isnanf.h.
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 #if HAVE_ISNAND_IN_LIBC
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18 /* Get declaration of isnan macro. */
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19 # include <math.h>
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20 # if __GNUC__ >= 4
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21 /* GCC 4.0 and newer provides three built-ins for isnan. */
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22 # undef isnand
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23 # define isnand(x) __builtin_isnan ((double)(x))
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24 # else
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25 # undef isnand
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26 # define isnand(x) isnan ((double)(x))
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27 # endif
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28 #else
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29 /* Test whether X is a NaN. */
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30 # undef isnand
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31 # define isnand rpl_isnand
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32 extern int isnand (double x);
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33 #endif