39 lines
639 B
C
39 lines
639 B
C
/*
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nexttowardf.c
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Contributed by Danny Smith <dannysmith@users.sourceforge.net>
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No copyright claimed, absolutely no warranties.
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2005-05-10
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*/
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#include <math.h>
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float
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nexttowardf (float x, long double y)
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{
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union
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{
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float f;
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unsigned int i;
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} u;
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long double xx = x;
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if (isnan (y) || isnan (x))
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return x + y;
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if (xx == y )
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/* nextafter (0.0, -O.0) should return -0.0. */
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return y;
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u.f = x;
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if (x == 0.0F)
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{
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u.i = 1;
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return y > 0.0L ? u.f : -u.f;
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}
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if (((x > 0.0F) ^ (y > xx)) == 0)
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u.i++;
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else
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u.i--;
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return u.f;
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}
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