74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
/* Inline maths functions if they are missing from libm
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifndef VIPS_INLINE_H
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#define VIPS_INLINE_H
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/* glib promises to define inline in a portable way
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*/
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#include <glib.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /*__cplusplus*/
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#ifdef HAVE_HYPOT
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#define vips__hypot hypot
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#else /* HAVE_HYPOT */
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static inline double
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vips__hypot( double a, double b )
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{
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double ta = fabs( a );
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double tb = fabs( b );
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if( ta > tb ) {
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tb = b / a;
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return( ta * sqrt( 1.0 + tb * tb ) );
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}
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else {
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ta = a / b;
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return( tb * sqrt( 1.0 + ta * ta ) );
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}
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}
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#endif /* HAVE_HYPOT */
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#ifdef __cplusplus
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}
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#endif /*__cplusplus*/
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#endif /*VIPS_INLINE_H*/
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