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#pragma once
class SafeSize
{
public:
SafeSize()
{
value = 0;
overflow = false;
}
void Add(size_t add)
{
if (!overflow)
{
value += add;
if (value < add)
overflow=true;
}
}
void AddN(size_t size, size_t count)
{
if (!overflow)
{
size_t total = size * count;
if (total < size)
{
overflow = true;
}
else
{
Add(total);
}
}
}
bool Overflowed() const
{
return overflow;
}
operator size_t ()
{
return value;
}
private:
size_t value;
bool overflow;
};
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