1: /* a simple pow10 implementation
3: Copyright (C) 1995,1998,2000,2003,2007 Free Software Foundation, Inc.
5: This file is part of Gforth.
7: Gforth is free software; you can redistribute it and/or
8: modify it under the terms of the GNU General Public License
9: as published by the Free Software Foundation, either version 3
10: of the License, or (at your option) any later version.
12: This program is distributed in the hope that it will be useful,
13: but WITHOUT ANY WARRANTY; without even the implied warranty of
14: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: GNU General Public License for more details.
17: You should have received a copy of the GNU General Public License
18: along with this program; if not, see http://www.gnu.org/licenses/.
20: #include <math.h>
22: #ifndef M_LN10
23: #define M_LN10 2.30258509299404568402
26: #if !defined(_ANSI_MATH_H) && !defined(exp)
27: /* this should be defined by math.h; If it is not, the miranda
28: * prototype would be wrong; Since we prefer compile-time errors to
29: * run-time errors, it's declared here. */
30: extern double exp(double);
32: #endif /* _ANSI_MATH_H */
34: double pow10(double x)
36: return exp(x*M_LN10);