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Annotation of gforth/engine/pow10.c, revision 1.7

1.1       anton       1: /* a simple pow10 implementation
                      2: 
1.6       anton       3:   Copyright (C) 1995,1998,2000,2003 Free Software Foundation, Inc.
1.1       anton       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
1.7     ! anton       9:   as published by the Free Software Foundation, either version 3
1.1       anton      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
1.7     ! anton      18:   along with this program; if not, see http://www.gnu.org/licenses/.
1.1       anton      19: */
                     20: #include <math.h>
                     21: 
                     22: #ifndef M_LN10
                     23: #define M_LN10      2.30258509299404568402
                     24: #endif
                     25: 
1.2       pazsan     26: #if !defined(_ANSI_MATH_H) && !defined(exp)
1.1       anton      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);
                     31: 
                     32: #endif /* _ANSI_MATH_H */
                     33: 
                     34: double pow10(double x)
                     35: {
                     36:   return exp(x*M_LN10);
                     37: }