mirror of https://github.com/gnss-sdr/gnss-sdr
134 lines
3.6 KiB
C++
134 lines
3.6 KiB
C++
/*!
|
|
* \file volk_gnsssdr_complex.h
|
|
* \brief Provide typedefs and operators for all complex types in C and C++.
|
|
* \author Andres Cecilia, 2014. a.cecilia.luque(at)gmail.com
|
|
*
|
|
* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
|
|
*
|
|
* This file is part of GNSS-SDR.
|
|
*
|
|
* GNSS-SDR 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GNSS-SDR 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 GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef INCLUDE_VOLK_COMPLEX_H
|
|
#define INCLUDE_VOLK_COMPLEX_H
|
|
|
|
#ifndef INCLUDED_VOLK_COMPLEX_H
|
|
#define INCLUDED_VOLK_COMPLEX_H
|
|
|
|
/*!
|
|
* \brief Provide typedefs and operators for all complex types in C and C++.
|
|
*
|
|
* The typedefs encompass all signed integer and floating point types.
|
|
* Each operator function is intended to work across all data types.
|
|
* Under C++, these operators are defined as inline templates.
|
|
* Under C, these operators are defined as preprocessor macros.
|
|
* The use of macros makes the operators agnostic to the type.
|
|
*
|
|
* The following operator functions are defined:
|
|
* - lv_cmake - make a complex type from components
|
|
* - lv_creal - get the real part of the complex number
|
|
* - lv_cimag - get the imaginary part of the complex number
|
|
* - lv_conj - take the conjugate of the complex number
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
|
|
#ifdef _MSC_VER
|
|
#include <complex.h>
|
|
#endif
|
|
#include <complex>
|
|
#include <stdint.h>
|
|
|
|
typedef std::complex<int8_t> lv_8sc_t;
|
|
typedef std::complex<int16_t> lv_16sc_t;
|
|
typedef std::complex<int32_t> lv_32sc_t;
|
|
typedef std::complex<int64_t> lv_64sc_t;
|
|
typedef std::complex<float> lv_32fc_t;
|
|
typedef std::complex<double> lv_64fc_t;
|
|
|
|
template <typename T>
|
|
inline std::complex<T> lv_cmake(const T &r, const T &i)
|
|
{
|
|
return std::complex<T>(r, i);
|
|
}
|
|
|
|
template <typename T>
|
|
inline typename T::value_type lv_creal(const T &x)
|
|
{
|
|
return x.real();
|
|
}
|
|
|
|
template <typename T>
|
|
inline typename T::value_type lv_cimag(const T &x)
|
|
{
|
|
return x.imag();
|
|
}
|
|
|
|
template <typename T>
|
|
inline T lv_conj(const T &x)
|
|
{
|
|
return std::conj(x);
|
|
}
|
|
|
|
#else /* __cplusplus */
|
|
|
|
#if __STDC_VERSION__ >= 199901L /* C99 check */
|
|
/* this allows us to conj in lv_conj without the double detour for single-precision floats */
|
|
#include <tgmath.h>
|
|
#endif /* C99 check */
|
|
|
|
#include <complex.h>
|
|
|
|
typedef char complex lv_8sc_t;
|
|
typedef short complex lv_16sc_t;
|
|
typedef long complex lv_32sc_t;
|
|
typedef long long complex lv_64sc_t;
|
|
typedef float complex lv_32fc_t;
|
|
typedef double complex lv_64fc_t;
|
|
|
|
#define lv_cmake(r, i) ((r) + _Complex_I * (i))
|
|
|
|
// When GNUC is available, use the complex extensions.
|
|
// The extensions always return the correct value type.
|
|
// https://gcc.gnu.org/onlinedocs/gcc/Complex.html
|
|
#ifdef __GNUC__
|
|
|
|
#define lv_creal(x) (__real__(x))
|
|
|
|
#define lv_cimag(x) (__imag__(x))
|
|
|
|
#define lv_conj(x) (~(x))
|
|
|
|
// When not available, use the c99 complex function family,
|
|
// which always returns double regardless of the input type,
|
|
// unless we have C99 and thus tgmath.h overriding functions
|
|
// with type-generic versions.
|
|
#else /* __GNUC__ */
|
|
|
|
#define lv_creal(x) (creal(x))
|
|
|
|
#define lv_cimag(x) (cimag(x))
|
|
|
|
#define lv_conj(x) (conj(x))
|
|
|
|
#endif /* __GNUC__ */
|
|
|
|
#endif /* __cplusplus */
|
|
|
|
|
|
#endif /* INCLUDED_VOLK_COMPLEX_H */
|
|
|
|
#endif /* INCLUDE_VOLK_COMPLEX_H */
|