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Diffstat (limited to 'gnulib/lib/isfinite.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/isfinite.c | 52 |
2 files changed, 52 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/isfinite.c b/gnulib/lib/isfinite.c new file mode 100644 index 0000000..310ac2c --- /dev/null +++ b/gnulib/lib/isfinite.c @@ -0,0 +1,52 @@ +/* Test for finite value (zero, subnormal, or normal, and not infinite or NaN). + Copyright (C) 2007-2011 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +/* Written by Ben Pfaff <blp@gnu.org>, 2007. */ + +#include <config.h> + +#include "isnanf-nolibm.h" +#include "isnand-nolibm.h" +#include "isnanl-nolibm.h" + +/* The "cc" compiler on HP-UX 11.11, when optimizing, simplifies the test + x - y == 0.0 to x == y, a simplification which is invalid when x and y + are Infinity. Disable this optimization. */ +#if defined __hpux && !defined __GNUC__ +static float zerof; +static double zerod; +static long double zerol; +#else +# define zerof 0.f +# define zerod 0. +# define zerol 0.L +#endif + +int gl_isfinitef (float x) +{ + return !isnanf (x) && x - x == zerof; +} + +int gl_isfinited (double x) +{ + return !isnand (x) && x - x == zerod; +} + +int gl_isfinitel (long double x) +{ + return !isnanl (x) && x - x == zerol; +} |