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- use crate::{HeaderTagFlag, HeaderTagHeader, HeaderTagType};
- use core::mem;
- use multiboot2_common::{MaybeDynSized, Tag};
- /// Possible flags for [`ConsoleHeaderTag`].
- #[repr(u32)]
- #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
- pub enum ConsoleHeaderTagFlags {
- /// Console required.
- ConsoleRequired = 0,
- /// EGA text support.
- EgaTextSupported = 1,
- }
- /// Tells that a console must be available in MBI.
- /// Only relevant for legacy BIOS.
- #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
- #[repr(C, align(8))]
- pub struct ConsoleHeaderTag {
- header: HeaderTagHeader,
- console_flags: ConsoleHeaderTagFlags,
- }
- impl ConsoleHeaderTag {
- /// Constructs a new tag.
- #[must_use]
- pub const fn new(flags: HeaderTagFlag, console_flags: ConsoleHeaderTagFlags) -> Self {
- let header =
- HeaderTagHeader::new(HeaderTagType::ConsoleFlags, flags, Self::BASE_SIZE as u32);
- Self {
- header,
- console_flags,
- }
- }
- /// Returns the [`HeaderTagType`].
- #[must_use]
- pub const fn typ(&self) -> HeaderTagType {
- self.header.typ()
- }
- /// Returns the [`HeaderTagFlag`]s.
- #[must_use]
- pub const fn flags(&self) -> HeaderTagFlag {
- self.header.flags()
- }
- /// Returns the size.
- #[must_use]
- pub const fn size(&self) -> u32 {
- self.header.size()
- }
- /// Returns the [`ConsoleHeaderTagFlags`].
- #[must_use]
- pub const fn console_flags(&self) -> ConsoleHeaderTagFlags {
- self.console_flags
- }
- }
- impl MaybeDynSized for ConsoleHeaderTag {
- type Header = HeaderTagHeader;
- const BASE_SIZE: usize = mem::size_of::<HeaderTagHeader>() + mem::size_of::<u32>();
- fn dst_len(_header: &Self::Header) -> Self::Metadata {}
- }
- impl Tag for ConsoleHeaderTag {
- type IDType = HeaderTagType;
- const ID: HeaderTagType = HeaderTagType::ConsoleFlags;
- }
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