50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
//! C API for the Chunker.
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use std::os::raw::c_void;
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use libc::size_t;
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use crate::Chunker;
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/// Creates a new chunker instance.
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#[no_mangle]
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pub extern "C" fn proxmox_chunker_new(chunk_size_avg: size_t) -> *mut Chunker {
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Box::leak(Box::new(Chunker::new(chunk_size_avg as usize)))
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}
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/// Drops an instance of a chunker. The pointer must be valid or `NULL`.
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#[no_mangle]
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pub extern "C" fn proxmox_chunker_done(me: *mut Chunker) {
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if !me.is_null() {
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unsafe {
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Box::from_raw(me);
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}
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}
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}
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/// Scan the specified data for a chunk border. Returns 0 if none was found, or a positive offset
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/// to a border.
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#[no_mangle]
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pub extern "C" fn proxmox_chunker_scan(
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me: *mut Chunker,
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data: *const c_void,
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size: size_t,
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) -> size_t {
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let me = unsafe { &mut *me };
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me.scan(unsafe { std::slice::from_raw_parts(data as *const u8, size as usize) }) as size_t
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}
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/// Compute a chunk digest. This is mostly a convenience method to avoid having to lookup the right
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/// digest method for your language of choice.
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#[no_mangle]
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pub extern "C" fn proxmox_chunk_digest(
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data: *const c_void,
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size: size_t,
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out_digest: *mut [u8; 32],
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) {
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let digest = crate::FixedChunk::from_data(unsafe {
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std::slice::from_raw_parts(data as *const u8, size as usize)
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});
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unsafe { *out_digest = digest.0 };
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}
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