toxcore/nacl/curvecp/byte_isequal.c
2013-07-02 09:53:34 -04:00

11 lines
271 B
C

#include "byte.h"
int byte_isequal(const void *yv,long long ylen,const void *xv)
{
const unsigned char *y = yv;
const unsigned char *x = xv;
unsigned char diff = 0;
while (ylen > 0) { diff |= (*y++ ^ *x++); --ylen; }
return (256 - (unsigned int) diff) >> 8;
}