if (temp ?? 0x20) {}

$ cat el.c
#include <stdlib.h>
#include <string.h>
#include <assert.h>

static void *eqpos(const void *buf, size_t buflen, const void *s, size_t slen)
{
if (slen > buflen)
return NULL;
for (size_t i = 0; i <= (buflen - slen); i++) {
char *pos = (char *)buf + i;
if (memcmp(pos, s, slen) == 0)
return pos;
}
return NULL;
}

int main()
{
const char *buf = "deadbeefcafe";
size_t buflen = strlen(buf);
const char *s;

s = "d";
assert((buf + 0) == eqpos(buf, buflen, s, strlen(s)));

s = "dead";
assert((buf + 0) == eqpos(buf, buflen, s, strlen(s)));

s = "none";
assert(NULL == eqpos(buf, buflen, s, strlen(s)));

s = "tooooooooooolarge";
assert(NULL == eqpos(buf, buflen, s, strlen(s)));

s = "cafe";
assert((buf + sizeof("deadbeef") - 1) == eqpos(buf, buflen, s, strlen(s)));

assert(buf == eqpos(buf, buflen, buf, buflen));

exit(EXIT_SUCCESS);
}
$ gcc el.c -Wall -g -O0 -std=gnu99
$ ./a.out
$

   DDRD = ~(1 << 2);

int x;
char s[2];
s[0]= x/10 + '0';
s[1]= x%10 + '0';

__inline BYTE RotateByteLeft(BYTE n, unsigned long i)
{
  return (n << i) | (n >> (8 - i));
}

__inline BYTE RotateByteRight(BYTE n, unsigned long i)
{
  return (n >> i) | (n << (8 - i));
}

#define ROR(x,y) (((x) >> (y)) | ((x) << ((sizeof(x)*8 - (y)))