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#include "kernel/devices/block_device.hpp"
#include "kapi/devices/device.hpp"
#include "kapi/system.hpp"
#include <kstd/string>
#include <cstddef>
namespace kernel::devices
{
block_device::block_device(size_t major, size_t minor, kstd::string const & name, size_t block_size)
: kapi::devices::device(major, minor, name)
, m_block_size(block_size)
{
if (m_block_size == 0)
{
kapi::system::panic("[DEVICES] block_device constructed with zero block size.");
}
}
auto block_device::calculate_transfer(size_t block_index) const -> transfer_info
{
size_t const offset = block_index * m_block_size;
size_t const limit = size();
size_t const available = (offset < limit) ? (limit - offset) : 0;
size_t const to_transfer = (available < m_block_size) ? available : m_block_size;
return {offset, to_transfer, m_block_size - to_transfer};
}
auto block_device::block_size() const -> size_t
{
return m_block_size;
}
auto block_device::capacity() const -> size_t
{
return size();
}
} // namespace kernel::devices
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