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pointer_double.c
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pointer_double.c
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/*
* Copyright 2021 Xilinx, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pointer_double.h"
data_t sub(data_t ptr[10], data_t size, data_t**flagPtr)
{
data_t x, i;
x = 0;
// Sum x if AND of local index and double-pointer index is true
for(i=0; i<size; ++i)
if (**flagPtr & i)
x += *(ptr+i);
return x;
}
data_t pointer_double(data_t pos, data_t x, data_t* flag)
{
data_t array[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
data_t* ptrFlag;
data_t i;
ptrFlag = flag;
// Write x into index position pos
if (pos >=0 & pos < 10)
*(array+pos) = x;
// Pass same index (as pos) as pointer to another function
return sub(array, 10, &ptrFlag);
}