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#include "bitset.h"
namespace MyGrate {
static_assert(std::forward_iterator<BitSet::Iterator>);
BitSet::Iterator::Iterator(const std::byte * bb) : b {bb} { }
bool
BitSet::Iterator::operator*() const
{
return (*b & m) != std::byte {};
}
bool
BitSet::Iterator::operator==(const BitSet::Iterator & o) const
{
return b == o.b && m == o.m;
}
bool
BitSet::Iterator::operator!=(const BitSet::Iterator & o) const
{
return b != o.b || m != o.m;
}
BitSet::Iterator &
BitSet::Iterator::operator++()
{
if (m == std::byte {128}) {
b++;
m = std::byte {1};
}
else {
m <<= 1;
}
return *this;
}
BitSet::Iterator
BitSet::Iterator::operator++(int)
{
auto pre {*this};
++*this;
return pre;
}
BitSet::BitSet(const std::span<const std::byte> bs) : bytes {bs} { }
std::size_t
BitSet::size() const
{
return bytes.size() * 8;
}
BitSet::Iterator
BitSet::begin() const
{
return BitSet::Iterator {bytes.data()};
}
BitSet::Iterator
BitSet::end() const
{
return BitSet::Iterator {bytes.data() + bytes.size()};
}
}
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