kopia lustrzana https://github.com/Dsplib/libdspl-2.0
137 wiersze
3.9 KiB
C
137 wiersze
3.9 KiB
C
/*
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* Copyright (c) 2015-2020 Sergey Bakhurin
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* Digital Signal Processing Library [http://dsplib.org]
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*
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* This file is part of DSPL.
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*
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* is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* DSPL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Foobar. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "dspl.h"
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#ifdef DOXYGEN_ENGLISH
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/*! *****************************************************************************
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\ingroup TYPES_GROUP
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\fn int re2cmplx(double* x, int n, complex_t *y)
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\brief Convert real array to the complex array.
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Function copies the vector `x` to the real part of vector `y`.
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Image part of the vector `y` sets as zero. \n
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So complex vector contains data: \n
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`y[i] = x[i] + j0, here i = 0,1,2 ... n-1`
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\param[in] x
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Pointer to the real vector `x`. \n
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Vector size is `[n x 1]`. \n \n
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\param[in] n
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Size of the real vector `x` and complex vector `y`. \n \n
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\param[out] y
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Pointer to the complex vector `y`. \n
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Vector size is `[n x 1]`. \n
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Memory must be allocated. \n \n
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\return
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`RES_OK` if function returns successfully. \n
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Else \ref ERROR_CODE_GROUP "code error": \n
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Example:
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\code{.cpp}
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double x[3] = {1.0, 2.0, 3.0};
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complex_t y[3];
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re2cmplx(x, 3, y);
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\endcode
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Vector `y` will keep:
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\verbatim
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y[0] = 1+0j;
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y[1] = 2+0j;
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y[2] = 3+0j.
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\endverbatim
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\author Sergey Bakhurin. www.dsplib.org
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***************************************************************************** */
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#endif
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#ifdef DOXYGEN_RUSSIAN
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/*! ****************************************************************************
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\ingroup TYPES_GROUP
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\fn int re2cmplx(double* x, int n, complex_t *y)
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\brief Преобразование массива вещественных данных в массив комплексных данных.
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Функция заполняет реальные части массива `y` данных соответсвующими значениями
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исходного вещественного массива `x`. \n
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\param[in] x
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Указатель на массив вещественных данных. \n
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Размер массива `[n x 1]`. \n \n
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\param[in] n
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Размер массивов входных и выходных данных. \n \n
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\param[out] y
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Указатель на адрес массива комплексных данных. \n
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Размер массива `[n x 1]`. \n
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Память должна быть выделена. \n \n
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\return
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`RES_OK` если преобразование произведено успешно. \n
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В противном случае \ref ERROR_CODE_GROUP "код ошибки": \n
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Например при выполнении следующего кода
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\code{.cpp}
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double x[3] = {1.0, 2.0, 3.0};
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complex_t y[3];
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re2cmplx(x, 3, y);
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\endcode
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Значениям `y` будут присвоены значения:
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\verbatim
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y[0] = 1+0j;
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y[1] = 2+0j;
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y[2] = 3+0j.
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\endverbatim
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\author Бахурин Сергей www.dsplib.org
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***************************************************************************** */
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#endif
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int DSPL_API re2cmplx(double* x, int n, complex_t* y)
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{
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int k;
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if(!x || !y)
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return ERROR_PTR;
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if(n < 1)
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return ERROR_SIZE;
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for(k = 0; k < n; k++)
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{
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RE(y[k]) = x[k];
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IM(y[k]) = 0.0;
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}
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return RES_OK;
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}
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