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/* Division by powers of two.
*/
#include <testfwk.h>
#include <stddef.h>
typedef unsigned int UINT;
typedef struct _HeapEntryState
{
void *pBase;
UINT uFlags;
} HeapEntryState;
static HeapEntryState *
_getHeapEntryState (void *p, HeapEntryState *pStates, UINT nStateEntries)
{
int uLeft = -1, uRight = nStateEntries, uMiddle;
while (uRight - uLeft > 1)
{
int iDiff;
uMiddle = (uLeft + uRight)/2;
/* A divide by zero is added just before iDiff is assigned */
iDiff = pStates[uMiddle].pBase - p;
if (iDiff > 0)
{
uRight = uMiddle;
}
else if (iDiff < 0)
{
uLeft = uMiddle;
}
else
{
return pStates + uMiddle;
}
}
return NULL;
}
void
testDivByZero (void)
{
HeapEntryState aStates[] = {
{ (void __xdata *)1, 0 }
};
void *p = (void __xdata *)0x1234;
ASSERT (_getHeapEntryState (p, aStates, 1) == NULL);
aStates[0].pBase = p;
ASSERT (_getHeapEntryState (p, aStates, 1) == aStates + 0);
}
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