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/*
* R : A Computer Language for Statistical Data Analysis
* Copyright (C) 1995, 1996, 1997 Robert Gentleman and Ross Ihaka
* Copyright (C) 2000-2018 The R Core Team
* Copyright (C) 2005 The R Foundation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, a copy is available at
* https://www.R-project.org/Licenses/
*/
#ifndef R_RCOMPLEX_H
#define R_RCOMPLEX_H
/* GCC has problems with header files on e.g. Solaris.
That OS defines the imaginary type, but GCC does not.
Probably needed elsewhere, e.g. AIX, HP-UX (PR#15083)
And use on Win32/64 suppresses warnings.
The warning was also seen on macOS 10.5, but not later.
*/
#if defined(__GNUC__) && (defined(__sun__) || defined(__hpux__) || defined(Win32))
# undef I
# define I (__extension__ 1.0iF)
#endif
/*
Note: this could use the C11 CMPLX() macro.
As could mycpow, z_tan and some of the substitutes.
*/
static R_INLINE double complex toC99(const Rcomplex *x)
{
#if __GNUC__
double complex ans = (double complex) 0; /* -Wall */
__real__ ans = x->r;
__imag__ ans = x->i;
return ans;
#else
return x->r + x->i * I;
#endif
}
static R_INLINE void
SET_C99_COMPLEX(Rcomplex *x, R_xlen_t i, double complex value)
{
Rcomplex *ans = x+i;
ans->r = creal(value);
ans->i = cimag(value);
}
#endif /* R_RCOMPLEX_H */