1 files changed, 91 insertions, 0 deletions
diff --git a/third_party/rust/object/src/archive.rs b/third_party/rust/object/src/archive.rs
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+++ b/third_party/rust/object/src/archive.rs
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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,);