kopia lustrzana https://github.com/Dsplib/libdspl-2.0
161 wiersze
4.9 KiB
C
161 wiersze
4.9 KiB
C
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/*
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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 libdspl-2.0.
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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 Lesser 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 Lesser 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 <string.h>
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#include "dspl.h"
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#ifdef DOXYGEN_ENGLISH
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/*! ****************************************************************************
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\ingroup ARRAY_GROUP
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\fn int concat(void* a, size_t na, void* b, size_t nb, void* c)
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\brief
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Concatenate arrays `a` and `b`
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Let's arrays `a` and `b` are vectors: \n
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`a = [a(0), a(1), ... a(na-1)]`, \n
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`b = [b(0), b(1), ... b(nb-1)]`, \n
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concatenation of these arrays will be array `c` size `na+nb`: \n
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`c = [a(0), a(1), ... a(na-1), b(0), b(1), ... b(nb-1)]`.
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\param[in] a
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Pointer to the first array `a`. \n
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Array `a` size is `na` bytes. \n
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\n
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\param[in] na
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Array `a` size (bytes). \n
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\n
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\param[in] b
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Pointer to the second array `b`. \n
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Array `b` size is `nb` bytes. \n
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\n
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\param[in] nb
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Array `a` size (bytes). \n
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\n
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\param[out] c
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Pointer to the concatenation result array `c`. \n
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Array `c` size is `na + nb` bytes. \n
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Memory must be allocated. \n
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\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".
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Function uses pointer type `void*` and can be useful for an arrays
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concatenation with different types. \n
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For example two `double` arrays concatenation:
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\code{.cpp}
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double a[3] = {1.0, 2.0, 3.0};
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double b[2] = {4.0, 5.0};
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double c[5];
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concat((void*)a, 3*sizeof(double), (void*)b, 2*sizeof(double), (void*)c);
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\endcode
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Vector `c` keeps follow data:
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\verbatim
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c = [1.0, 2.0, 3.0, 4.0, 5.0]
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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 ARRAY_GROUP
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\fn int concat(void* a, size_t na, void* b, size_t nb, void* c)
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\brief Конкатенация двух массивов данных
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Функция производит конкатенацию двух массивов. Пусть массивы `a` и `b`
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заданы как векторы: \n
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`a = [a(0), a(1), ... a(na-1)]`, \n
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`b = [b(0), b(1), ... b(nb-1)]`, \n
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тогда результатом конкатенации будет вектор размера `na+nb` вида: \n
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`c = [a(0), a(1), ... a(na-1), b(0), b(1), ... b(nb-1)]`.
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\param[in] a
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Указатель на первый вектор `a`. \n
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Размер вектора `na` байт. \n \n
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\param[in] na
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Размер первого вектора `a` в байт. \n \n
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\param[in] b
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Указатель на второй вектор `b`. \n
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Размер памяти вектора `nb` байт. \n \n
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\param[in] nb
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Размер второго вектора `b` в байт. \n \n
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\param[out] c
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Указатель на вектор конкатенации `c`. \n
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Размер памяти вектора `na + nb` байт. \n
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Память должна быть выделена. \n \n
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\return
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`RES_OK` если функция выполнена успешно. \n
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В противном случае \ref ERROR_CODE_GROUP "код ошибки".
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\note
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Функция использует указатели типа `void*` и может быть использована для
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конкатенации данных различного типа. \n
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Например конкатенация массивов типа `double`:
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\code{.cpp}
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double a[3] = {1.0, 2.0, 3.0};
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double b[2] = {4.0, 5.0};
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double c[5];
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concat((void*)a, 3*sizeof(double), (void*)b, 2*sizeof(double), (void*)c);
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\endcode
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в результате вектор `c` будет хранить массив данных:
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\verbatim
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c = [1.0, 2.0, 3.0, 4.0, 5.0]
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\endverbatim
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\author
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Бахурин Сергей
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www.dsplib.org
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***************************************************************************** */
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#endif
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int DSPL_API concat(void* a, size_t na, void* b, size_t nb, void* c)
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{
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if(!a || !b || !c || c == b)
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return ERROR_PTR;
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if(na < 1 || nb < 1)
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return ERROR_SIZE;
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if(c != a)
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memcpy(c, a, na);
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memcpy((char*)c+na, b, nb);
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return RES_OK;
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}
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