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⚡ Add FFI bindings for lzma_index functions and the LZMA_STREAM_HEADER_SIZE constant in manual.rs. #187

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⚡ Add FFI bindings for lzma_index functions and the LZMA_STREAM_HEADER_SIZE constant in manual.rs. #187

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21 changes: 21 additions & 0 deletions liblzma-sys/src/manual.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,9 @@ pub const LZMA_FILTER_RISCV: lzma_vli = 0x0B;
pub const LZMA_FILTER_LZMA1: lzma_vli = 0x4000000000000001;
pub const LZMA_FILTER_LZMA2: lzma_vli = 0x21;

// Size of the LZMA/XZ stream header/footer in bytes.
pub const LZMA_STREAM_HEADER_SIZE: u32 = 12;

#[repr(C)]
pub struct lzma_allocator {
pub alloc: Option<extern "C" fn(*mut c_void, size_t, size_t) -> *mut c_void>,
Expand Down Expand Up @@ -215,6 +218,12 @@ pub struct lzma_options_bcj {
pub start_offset: u32,
}

#[repr(C)]
pub struct lzma_index_s {
_unused: [u8; 0],
}
pub type lzma_index = lzma_index_s;

extern "C" {
pub fn lzma_code(strm: *mut lzma_stream, action: lzma_action) -> lzma_ret;
pub fn lzma_end(strm: *mut lzma_stream);
Expand Down Expand Up @@ -344,6 +353,18 @@ extern "C" {
b: *const lzma_stream_flags,
) -> lzma_ret;

// Index parsing and querying used by high-level helpers.
pub fn lzma_index_buffer_decode(
i: *mut *mut lzma_index,
memlimit: *mut u64,
allocator: *const lzma_allocator,
input: *const u8,
in_pos: *mut usize,
in_size: usize,
) -> lzma_ret;
pub fn lzma_index_uncompressed_size(i: *const lzma_index) -> lzma_vli;
pub fn lzma_index_end(i: *mut lzma_index, allocator: *const lzma_allocator);

pub fn lzma_version_number() -> u32;
pub fn lzma_version_string() -> *const c_char;

Expand Down
2 changes: 0 additions & 2 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -97,7 +97,6 @@ pub fn copy_decode<R: Read, W: Write>(source: R, mut destination: W) -> io::Resu
}

/// Find the size in bytes of uncompressed data from xz file.
#[cfg(feature = "bindgen")]
pub fn uncompressed_size<R: Read + Seek>(mut source: R) -> io::Result<u64> {
use std::mem::MaybeUninit;
let mut footer = [0u8; liblzma_sys::LZMA_STREAM_HEADER_SIZE as usize];
Expand Down Expand Up @@ -197,7 +196,6 @@ mod tests {
}

#[test]
#[cfg(feature = "bindgen")]
fn size() {
quickcheck(test as fn(_) -> _);

Expand Down
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