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#include <kapi/filesystem.hpp>
#include <kernel/vfs.hpp>
#include <kstd/memory.hpp>
#include <kstd/result.hpp>
#include <kstd/system_error.hpp>
#include <kstd/units.hpp>
#include <cstddef>
#include <cstdint>
#include <expected>
#include <span>
#include <string_view>
#include <utility>
namespace kapi::filesystem
{
auto mount(std::string_view source, std::string_view target) -> kstd::result<void>
{
return kernel::vfs::vfs::get().mount(source, target);
}
auto umount(std::string_view target) -> kstd::result<void>
{
return kernel::vfs::vfs::get().unmount(target);
}
auto open(std::string_view path) -> kstd::result<std::size_t>
{
return kernel::vfs::vfs::get()
.open(path)
.transform([](auto dentry) -> kstd::shared_ptr<kernel::vfs::open_file_descriptor> {
if (dentry->inode()->is_directory())
{
return kstd::make_shared<kernel::vfs::directory_file_descriptor>(dentry);
}
return kstd::make_shared<kernel::vfs::byte_offset_file_descriptor>(dentry);
})
.and_then([](auto file_descriptor) { return kernel::vfs::open_file_table::get().add_file(file_descriptor); });
}
auto close(size_t file_descriptor) -> kstd::result<void>
{
return kernel::vfs::open_file_table::get()
.file(file_descriptor)
.transform([](auto file) { return file->get_dentry()->absolute_path(); })
.and_then([](auto path) { return kernel::vfs::vfs::get().close(path); })
.and_then([=]() { return kernel::vfs::open_file_table::get().remove_file(file_descriptor); });
}
auto read(size_t file_descriptor, std::span<std::byte> buffer) -> kstd::result<kstd::bytes>
{
return kernel::vfs::open_file_table::get().file(file_descriptor).and_then([=](auto descriptor) {
return descriptor->read(buffer);
});
}
auto write(size_t file_descriptor, std::span<std::byte const> buffer) -> kstd::result<kstd::bytes>
{
return kernel::vfs::open_file_table::get().file(file_descriptor).and_then([=](auto descriptor) {
return descriptor->write(buffer);
});
}
auto seek(size_t file_descriptor, kstd::offset offset, seek_origin origin) -> kstd::result<kstd::bytes>
{
return kernel::vfs::open_file_table::get().file(file_descriptor).and_then([=](auto file) {
return file->seek(offset, origin);
});
}
auto mkdir(std::string_view path) -> kstd::result<void>
{
return kernel::vfs::vfs::get().mkdir(path);
}
auto create(std::string_view path) -> kstd::result<void>
{
return kernel::vfs::vfs::get().create(path);
}
auto status(std::string_view path) -> kstd::result<file_status>
{
return kernel::vfs::vfs::get().status(path);
}
auto create_device_node(std::string_view path, file_type type, device_number number) -> kstd::result<void>
{
return kernel::vfs::vfs::get().create_device_node(path, static_cast<std::uint32_t>(type), number);
}
auto read_directory(std::size_t file_descriptor, directory_cursor position, std::span<directory_entry> buffer)
-> kstd::result<std::pair<std::size_t, directory_cursor>>
{
static_cast<void>(file_descriptor);
static_cast<void>(position);
static_cast<void>(buffer);
return kstd::failure(make_error_code(kstd::errc::not_supported));
}
} // namespace kapi::filesystem
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