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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/***************************************************************************
coreutil.c
Miscellaneous utility code
***************************************************************************/
#include "coreutil.h"
#include <cassert>
/***************************************************************************
BINARY CODED DECIMAL HELPERS
***************************************************************************/
int bcd_adjust(int value)
{
if ((value & 0xf) >= 0xa)
value = value + 0x10 - 0xa;
if ((value & 0xf0) >= 0xa0)
value = value - 0xa0 + 0x100;
return value;
}
uint32_t dec_2_bcd(uint32_t a)
{
uint32_t result = 0;
int shift = 0;
while (a != 0)
{
result |= (a % 10) << shift;
a /= 10;
shift += 4;
}
return result;
}
uint32_t bcd_2_dec(uint32_t a)
{
uint32_t result = 0;
uint32_t scale = 1;
while (a != 0)
{
result += (a & 0x0f) * scale;
a >>= 4;
scale *= 10;
}
return result;
}
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