mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-09-19 16:46:11 -04:00
87 lines
1.4 KiB
C++
87 lines
1.4 KiB
C++
//
|
|
// FILE: nibbleArray.cpp
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.2.6
|
|
// PURPOSE: Arduino library for a compact array of nibbles (4 bits)
|
|
// URL: https://github.com/RobTillaart/nibbleArray
|
|
|
|
|
|
#include "nibbleArray.h"
|
|
|
|
|
|
nibbleArray::nibbleArray(const uint16_t size)
|
|
{
|
|
_size = size;
|
|
if (_size > (uint16_t) NIBBLEARRAY_MAXSIZE)
|
|
{
|
|
_size = (uint16_t) NIBBLEARRAY_MAXSIZE;
|
|
}
|
|
_bytes = (_size + 1)/2;
|
|
_arr = (uint8_t *) malloc(_bytes);
|
|
}
|
|
|
|
|
|
nibbleArray::~nibbleArray()
|
|
{
|
|
if (_arr != NULL)
|
|
{
|
|
free(_arr);
|
|
}
|
|
}
|
|
|
|
|
|
uint8_t nibbleArray::get(const uint16_t index)
|
|
{
|
|
// disable this check for more speed
|
|
if (index > _size)
|
|
{
|
|
return NIBBLEARRAY_ERROR_INDEX;
|
|
}
|
|
if (index & 1) return _arr[index/2] & 0x0F;
|
|
return _arr[index/2] >> 4;
|
|
}
|
|
|
|
|
|
uint8_t nibbleArray::set(const uint16_t index, uint8_t value)
|
|
{
|
|
// disable this check for more speed
|
|
if (index > _size)
|
|
{
|
|
return NIBBLEARRAY_ERROR_INDEX;
|
|
}
|
|
uint8_t v = value & 0x0F;
|
|
if (index & 1) _arr[index/2] = (_arr[index/2] & 0xF0) | v;
|
|
else _arr[index/2] = (_arr[index/2] & 0x0F) | (v << 4);
|
|
return NIBBLEARRAY_OK;
|
|
}
|
|
|
|
|
|
uint16_t nibbleArray::size()
|
|
{
|
|
return _size;
|
|
};
|
|
|
|
|
|
uint16_t nibbleArray::memory()
|
|
{
|
|
return _bytes;
|
|
};
|
|
|
|
|
|
void nibbleArray::clear()
|
|
{
|
|
memset(_arr, 0, (_size + 1)/2);
|
|
}
|
|
|
|
|
|
void nibbleArray::setAll(uint8_t value)
|
|
{
|
|
uint8_t v = value & 0x0F;
|
|
v |= (v << 4);
|
|
memset(_arr, v, (_size + 1)/2);
|
|
}
|
|
|
|
|
|
// -- END OF FILE --
|
|
|