mirror of https://github.com/gnss-sdr/gnss-sdr
87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
#ifndef INCLUDE_VOLK_COMPLEX_H
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#define INCLUDE_VOLK_COMPLEX_H
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/*!
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* \brief Provide typedefs and operators for all complex types in C and C++.
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*
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* The typedefs encompass all signed integer and floating point types.
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* Each operator function is intended to work across all data types.
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* Under C++, these operators are defined as inline templates.
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* Under C, these operators are defined as preprocessor macros.
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* The use of macros makes the operators agnostic to the type.
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*
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* The following operator functions are defined:
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* - lv_cmake - make a complex type from components
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* - lv_creal - get the real part of the complex number
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* - lv_cimag - get the imaginary part of the complex number
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* - lv_conj - take the conjugate of the complex number
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*/
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#ifdef __cplusplus
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#include <complex>
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#include <stdint.h>
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typedef std::complex<int8_t> lv_8sc_t;
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typedef std::complex<int16_t> lv_16sc_t;
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typedef std::complex<int32_t> lv_32sc_t;
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typedef std::complex<int64_t> lv_64sc_t;
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typedef std::complex<float> lv_32fc_t;
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typedef std::complex<double> lv_64fc_t;
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template <typename T> inline std::complex<T> lv_cmake(const T &r, const T &i){
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return std::complex<T>(r, i);
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}
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template <typename T> inline typename T::value_type lv_creal(const T &x){
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return x.real();
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}
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template <typename T> inline typename T::value_type lv_cimag(const T &x){
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return x.imag();
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}
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template <typename T> inline T lv_conj(const T &x){
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return std::conj(x);
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}
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#else /* __cplusplus */
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#include <complex.h>
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typedef char complex lv_8sc_t;
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typedef short complex lv_16sc_t;
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typedef long complex lv_32sc_t;
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typedef long long complex lv_64sc_t;
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typedef float complex lv_32fc_t;
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typedef double complex lv_64fc_t;
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#define lv_cmake(r, i) ((r) + _Complex_I*(i))
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// When GNUC is available, use the complex extensions.
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// The extensions always return the correct value type.
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// http://gcc.gnu.org/onlinedocs/gcc/Complex.html
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#ifdef __GNUC__
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#define lv_creal(x) (__real__(x))
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#define lv_cimag(x) (__imag__(x))
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#define lv_conj(x) (~(x))
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// When not available, use the c99 complex function family,
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// which always returns double regardless of the input type.
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#else /* __GNUC__ */
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#define lv_creal(x) (creal(x))
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#define lv_cimag(x) (cimag(x))
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#define lv_conj(x) (conj(x))
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#endif /* __GNUC__ */
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#endif /* __cplusplus */
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#endif /* INCLUDE_VOLK_COMPLEX_H */
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