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#include <kernel/filesystem/open_file_descriptor.hpp>
#include <kernel/filesystem/dentry.hpp>
#include <kstd/memory>
#include <kstd/os/error.hpp>
#include <cstddef>
namespace kernel::filesystem
{
open_file_descriptor::open_file_descriptor(kstd::shared_ptr<dentry> const & dentry)
: m_dentry(dentry)
, m_offset(0)
{
if (!dentry)
{
kstd::os::panic("[FILESYSTEM] open_file_descriptor constructed with null dentry.");
}
}
auto open_file_descriptor::read(void * buffer, size_t size) -> size_t
{
auto read_bytes = m_dentry->get_inode()->read(buffer, m_offset, size);
m_offset += read_bytes;
return read_bytes;
}
auto open_file_descriptor::write(void const * buffer, size_t size) -> size_t
{
auto written_bytes = m_dentry->get_inode()->write(buffer, m_offset, size);
m_offset += written_bytes;
return written_bytes;
}
auto open_file_descriptor::get_offset() const -> size_t
{
return m_offset;
}
auto open_file_descriptor::get_dentry() const -> kstd::shared_ptr<dentry> const &
{
return m_dentry;
}
} // namespace kernel::filesystem
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