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//! Archive definitions.
//!
//! These definitions are independent of read/write support, although we do implement
//! some traits useful for those.
use crate::pod::Pod;
/// File identification bytes stored at the beginning of the file.
pub const MAGIC: [u8; 8] = *b"!<arch>\n";
/// File identification bytes at the beginning of AIX big archive.
pub const AIX_BIG_MAGIC: [u8; 8] = *b"<bigaf>\n";
/// File identification bytes stored at the beginning of a thin archive.
///
/// A thin archive only contains a symbol table and file names.
pub const THIN_MAGIC: [u8; 8] = *b"!<thin>\n";
/// The terminator for each archive member header.
pub const TERMINATOR: [u8; 2] = *b"`\n";
/// The header at the start of an archive member.
#[derive(Debug, Clone, Copy)]
#[repr(C)]
pub struct Header {
/// The file name.
pub name: [u8; 16],
/// File modification timestamp in decimal.
pub date: [u8; 12],
/// User ID in decimal.
pub uid: [u8; 6],
/// Group ID in decimal.
pub gid: [u8; 6],
/// File mode in octal.
pub mode: [u8; 8],
/// File size in decimal.
pub size: [u8; 10],
/// Must be equal to `TERMINATOR`.
pub terminator: [u8; 2],
}
/// The header at the start of an AIX big archive member, without name.
#[derive(Debug, Clone, Copy)]
#[repr(C)]
pub struct AixHeader {
/// File member size in decimal.
pub size: [u8; 20],
/// Next member offset in decimal.
pub nxtmem: [u8; 20],
/// Previous member offset in decimal.
pub prvmem: [u8; 20],
/// File member date in decimal.
pub date: [u8; 12],
/// File member user id in decimal.
pub uid: [u8; 12],
/// File member group id in decimal.
pub gid: [u8; 12],
/// File member mode in octal.
pub mode: [u8; 12],
/// File member name length in decimal.
pub namlen: [u8; 4],
}
/// The AIX big archive's fixed length header at file beginning.
#[derive(Debug, Clone, Copy)]
#[repr(C)]
pub struct AixFileHeader {
/// Archive magic string.
pub magic: [u8; 8],
/// Offset of member table.
pub memoff: [u8; 20],
/// Offset of global symbol table.
pub gstoff: [u8; 20],
/// Offset of global symbol table for 64-bit objects.
pub gst64off: [u8; 20],
/// Offset of first member.
pub fstmoff: [u8; 20],
/// Offset of last member.
pub lstmoff: [u8; 20],
/// Offset of first member on free list.
pub freeoff: [u8; 20],
}
/// Offset of a member in an AIX big archive.
///
/// This is used in the member index.
#[derive(Debug, Clone, Copy)]
#[repr(C)]
pub struct AixMemberOffset(pub [u8; 20]);
unsafe_impl_pod!(Header, AixHeader, AixFileHeader, AixMemberOffset,);
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