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#include "project.h"
int check_parity (uint8_t *d, unsigned s, unsigned e, uint8_t p)
{
unsigned i;
for (i = s; i <= e; ++i)
p ^= d[i];
return !p;
}
unsigned bcd (uint8_t *d, unsigned s, unsigned e)
{
unsigned ret = 0, c, b, i;
for (i = e, c = 1, b = 0; i >= s; --i, b++) {
if (d[i]) ret += c;
switch (b & 3) {
case 0:
case 1:
case 2:
c <<= 1;
break;
default:
c >>= 3;
c *= 10;
}
}
return ret;
}
unsigned le_bcd (uint8_t *d, unsigned s, unsigned e)
{
unsigned ret = 0, c, b, i;
for (i = s, c = 1, b = 0; i <= e; ++i, b++) {
if (d[i]) ret += c;
switch (b & 3) {
case 0:
case 1:
case 2:
c <<= 1;
break;
default:
c >>= 3;
c *= 10;
}
}
return ret;
}
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