GNU Radio 2.x: gr_math.h Source File

Main Page | Modules | Namespace List | Class Hierarchy | Class List | File List | Class Members | File Members

# gr_math.h

Go to the documentation of this file.

    00001 /* -*- c++ -*- */
    00002 /*
    00003  * Copyright 2003 Free Software Foundation, Inc.
    00004  *
    00005  * This file is part of GNU Radio
    00006  *
    00007  * GNU Radio is free software; you can redistribute it and/or modify
    00008  * it under the terms of the GNU General Public License as published by
    00009  * the Free Software Foundation; either version 2, or (at your option)
    00010  * any later version.
    00011  *
    00012  * GNU Radio is distributed in the hope that it will be useful,
    00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00015  * GNU General Public License for more details.
    00016  *
    00017  * You should have received a copy of the GNU General Public License
    00018  * along with GNU Radio; see the file COPYING.  If not, write to
    00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    00020  * Boston, MA 02111-1307, USA.
    00021  */
    00022
    00023 /*
    00024  * mathematical odds and ends.
    00025  */
    00026
    00027 #ifndef _GR_MATH_H_
    00028 #define _GR_MATH_H_
    00029
    00030 long gr_gcd (long m, long n);
    00031
    00032 // returns a non-zero value if value is "not-a-number" (NaN), and 0 otherwise
    00033 int gr_isnan (double value);
    00034
    00035 // returns a non-zero value if the value of x has its sign bit set.
    00036 //
    00037 // This  is  not  the  same  as `x < 0.0', because IEEE 754 floating point
    00038 // allows zero to be signed.  The comparison `-0.0 < 0.0'  is  false,  but
    00039 // `gr_signbit (-0.0)' will return a nonzero value.
    00040
    00041 int gr_signbit (double x);
    00042
    00043
    00044 #endif /* _GR_MATH_H_ */