//

// FILE: nibbleArray.cpp

// AUTHOR: Rob Tillaart

// VERSION: 0.2.1

// PURPOSE: Arduino library for a compact array of nibbles (4 bits)

// URL: https://github.com/RobTillaart/nibbleArray

//

// HISTORY:

// 0.1.0 2015-04-12 initial version

// 0.2.0 2020-06-21 refactor; #pragma once; removed pre 1.0 support

// 0.2.1 2020-01-02 arduino-CI + unit test

#include "nibbleArray.h"

nibbleArray::nibbleArray(uint16_t size)

{

_size = min(NIBBLEARRAY_MAXSIZE, size);

arr = (uint8_t *) malloc((_size + 1)/2);

}

nibbleArray::~nibbleArray()

{

if (arr != NULL) free(arr);

}

uint8_t nibbleArray::get(const uint16_t idx)

{

if (idx > _size) return NIBBLEARRAY_ERROR_INDEX; // disable this check for more speed

if (idx & 1) return arr[idx/2] & 0x0F;

return arr[idx/2] >> 4;

}

uint8_t nibbleArray::set(const uint16_t idx, uint8_t value)

{

if (idx > _size) return NIBBLEARRAY_ERROR_INDEX; // disable this check for more speed

uint8_t v = value & 0x0F;

if (idx & 1) arr[idx/2] = (arr[idx/2] & 0xF0) | v;

else arr[idx/2] = (arr[idx/2] & 0x0F) | (v << 4);

return NIBBLEARRAY_OK;

}

void nibbleArray::clear()

{

memset(arr, 0, (_size+1)/2);

}

void nibbleArray::setAll(uint8_t val)

{

uint8_t v = (val << 4) | val;

memset(arr, v, (_size + 1)/2);

}

// -- END OF FILE --