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#include "kernel/filesystem/mount_table.hpp"
#include "kernel/filesystem/mount.hpp"
#include <kstd/memory>
#include <cstddef>
#include <string_view>
namespace kernel::filesystem
{
void mount_table::add_mount(kstd::shared_ptr<mount> const & mount)
{
m_mounts.push_back(mount);
}
auto mount_table::find_longest_prefix_mount(std::string_view path) const -> kstd::shared_ptr<mount>
{
kstd::shared_ptr<mount> mount_with_longest_prefix = nullptr;
std::size_t best_len = 0;
for (auto const & mount : m_mounts)
{
auto mp = mount->get_mount_path();
// /a/b/c should match /a/b but not /a/bb or /a/b/c/d, / should match everything
bool is_prefix = path.starts_with(mp) && (mp == "/" || path.size() == mp.size() || path[mp.size()] == '/');
if (is_prefix && mp.size() >= best_len)
{
mount_with_longest_prefix = mount;
best_len = mp.size();
}
}
return mount_with_longest_prefix;
}
} // namespace kernel::filesystem
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