Function croaring_sys::roaring_bitmap_portable_serialize

pub unsafe extern "C" fn roaring_bitmap_portable_serialize(
    r: *const roaring_bitmap_t,
    buf: *mut c_char
) -> usize

Write a bitmap to a char buffer. The output buffer should refer to at least roaring_bitmap_portable_size_in_bytes(r) bytes of allocated memory.

Returns how many bytes were written which should match roaring_bitmap_portable_size_in_bytes(r).

This is meant to be compatible with the Java and Go versions: https://github.com/RoaringBitmap/RoaringFormatSpec