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    1: /* 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: #include <math.h>
   22: 
   23: #ifndef M_LN10
   24: #define M_LN10      2.30258509299404568402
   25: #endif
   26: 
   27: #ifndef _ANSI_MATH_H
   28: /* this should be defined by math.h; If it is not, the miranda
   29:  *    prototype would be wrong; Since we prefer compile-time errors to
   30:  *    run-time errors, it's declared here. */
   31: extern double exp(double);
   32: 
   33: #endif /* _ANSI_MATH_H */
   34: 
   35: double pow10(double x)
   36: {
   37:   return exp(x*M_LN10);
   38: }