gforth: gforth/Attic/pow10.c

1 :	anton	1.2	/* a simple pow10 implementation
2 :
3 :			Copyright (C) 1995 Free Software Foundation, Inc.
4 :
5 :			This file is part of Gforth.
6 :
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 2
10 :			of the License, or (at your option) any later version.
11 :
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.
16 :
17 :			You should have received a copy of the GNU General Public License
18 :			along with this program; if not, write to the Free Software
19 :			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 :			*/
21 :	anton	1.1	#include <math.h>
22 :
23 :			#ifndef M_LN10
24 :			#define M_LN10 2.30258509299404568402
25 :			#endif
26 :
27 :	pazsan	1.3	#ifndef _ANSI_MATH_H
28 :	anton	1.1	/* this should be defined by math.h; If it is not, the miranda
29 :	pazsan	1.3	* prototype would be wrong; Since we prefer compile-time errors to
30 :			* run-time errors, it's declared here. */
31 :	anton	1.1	extern double exp(double);
32 :	pazsan	1.3
33 :			#endif /* _ANSI_MATH_H */
34 :	anton	1.1
35 :			double pow10(double x)
36 :			{
37 :			return exp(x*M_LN10);
38 :			}