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tmk_keyboard/util.c
2010-10-27 22:56:01 +09:00

19 lines
309 B
C

#include "util.h"
int bitpop(uint8_t bits)
{
int c;
for (c = 0; bits; c++)
bits &= bits -1;
return c;
}
int biton(uint8_t bits)
{
int n = 0;
if (bits >> 4) { bits >>= 4; n += 4;}
if (bits >> 2) { bits >>= 2; n += 2;}
if (bits >> 1) { bits >>= 1; n += 1;}
return n;
}