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#include <stdlib.h>
#include "arch.h" // page_size
#include "sanitise.h"
#include "random.h"
unsigned long get_len(void)
{
int i = 0;
if (RAND_BOOL()) {
switch (rnd() % 4) {
case 0: return sizeof(char);
case 1: return sizeof(int);
case 2: return sizeof(long);
case 3: return page_size;
}
}
i = rand32();
/* short circuit if 0 */
if (i == 0)
return 0;
switch (rnd() % 6) {
case 0: i &= 0xff;
break;
case 1: i &= page_size - 1;
break;
case 2: i &= 0xffff;
break;
case 3: i &= 0xffffff;
break;
case 4: i &= 0xffffffff;
break;
case 5:
// Pass through
break;
}
/* again, short circuit if 0 */
if (i == 0)
return 0;
/* we might get lucky if something is counting ints/longs etc. */
if (ONE_IN(4)) {
int _div = 1 << RAND_RANGE(1, 4); /* 2,4,8 or 16 */
i /= _div;
}
return i;
}
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