1 /* PSPP - computes sample statistics.
2 Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful, but
10 WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 #define EPSILON (10 * DBL_EPSILON)
27 /* HUGE_VAL is traditionally defined as positive infinity, or
28 alternatively, DBL_MAX. */
30 #define isinf(X) (fabs (X) == HUGE_VAL)
33 /* A Not a Number is not equal to itself. */
35 #define isnan(X) ((X) != (X))
38 /* Finite numbers are not infinities or NaNs. */
40 #define finite(X) (!isinf (X) && !isnan (X))
42 #include <ieeefp.h> /* Declares finite() under Solaris. */
45 /* Divides nonnegative X by positive Y, rounding up. */
46 #define DIV_RND_UP(X, Y) (((X) + ((Y) - 1)) / (Y))
48 /* Returns nonnegative difference between {nonnegative X} and {the
49 least multiple of positive Y greater than or equal to X}. */
50 #define REM_RND_UP(X, Y) ((X) % (Y) ? (Y) - (X) % (Y) : 0)
52 /* Rounds X up to the next multiple of Y. */
53 #define ROUND_UP(X, Y) (((X) + ((Y) - 1)) / (Y) * (Y))
55 /* Rounds X down to the previous multiple of Y. */
56 #define ROUND_DOWN(X, Y) ((X) / (Y) * (Y))
58 int intlog10 (unsigned);
60 /* Returns the square of X. */
67 /* Returns the cube of X. */
74 /* Returns the fourth power of X. */
83 #endif /* math/misc.h */