1pub mod commons;
  2pub mod encoding;
  3#[allow(non_camel_case_types, non_snake_case, non_upper_case_globals, dead_code, improper_ctypes)]
  4// Other modules and exports
  5pub mod ffi;
  6pub mod mat_znx_dft;
  7pub mod module;
  8pub mod sampling;
  9pub mod scalar_znx_dft;
 10pub mod stats;
 11pub mod vec_znx;
 12pub mod vec_znx_big;
 13pub mod vec_znx_big_ops;
 14pub mod vec_znx_dft;
 15pub mod vec_znx_ops;
 16
 17pub use commons::*;
 18pub use encoding::*;
 19pub use mat_znx_dft::*;
 20pub use module::*;
 21pub use sampling::*;
 22pub use scalar_znx_dft::*;
 23#[allow(unused_imports)]
 24pub use stats::*;
 25pub use vec_znx::*;
 26pub use vec_znx_big::*;
 27pub use vec_znx_big_ops::*;
 28pub use vec_znx_dft::*;
 29pub use vec_znx_ops::*;
 30
 31pub const GALOISGENERATOR: u64 = 5;
 32pub const DEFAULTALIGN: usize = 64;
 33
 34fn is_aligned_custom<T>(ptr: *const T, align: usize) -> bool {
 35    (ptr as usize) % align == 0
 36}
 37
 38pub fn is_aligned<T>(ptr: *const T) -> bool {
 39    is_aligned_custom(ptr, DEFAULTALIGN)
 40}
 41
 42pub fn assert_alignement<T>(ptr: *const T) {
 43    assert!(
 44        is_aligned(ptr),
 45        "invalid alignement: ensure passed bytes have been allocated with [alloc_aligned_u8] or [alloc_aligned]"
 46    )
 47}
 48
 49pub fn cast<T, V>(data: &[T]) -> &[V] {
 50    let ptr: *const V = data.as_ptr() as *const V;
 51    let len: usize = data.len() / std::mem::size_of::<V>();
 52    unsafe { std::slice::from_raw_parts(ptr, len) }
 53}
 54
 55pub fn cast_mut<T, V>(data: &[T]) -> &mut [V] {
 56    let ptr: *mut V = data.as_ptr() as *mut V;
 57    let len: usize = data.len() / std::mem::size_of::<V>();
 58    unsafe { std::slice::from_raw_parts_mut(ptr, len) }
 59}
 60
 61/// Allocates a block of bytes with a custom alignement.
 62/// Alignement must be a power of two and size a multiple of the alignement.
 63/// Allocated memory is initialized to zero.
 64fn alloc_aligned_custom_u8(size: usize, align: usize) -> Vec<u8> {
 65    assert!(
 66        align.is_power_of_two(),
 67        "Alignment must be a power of two but is {}",
 68        align
 69    );
 70    assert_eq!(
 71        (size * std::mem::size_of::<u8>()) % align,
 72        0,
 73        "size={} must be a multiple of align={}",
 74        size,
 75        align
 76    );
 77    unsafe {
 78        let layout: std::alloc::Layout = std::alloc::Layout::from_size_align(size, align).expect("Invalid alignment");
 79        let ptr: *mut u8 = std::alloc::alloc(layout);
 80        if ptr.is_null() {
 81            panic!("Memory allocation failed");
 82        }
 83        assert!(
 84            is_aligned_custom(ptr, align),
 85            "Memory allocation at {:p} is not aligned to {} bytes",
 86            ptr,
 87            align
 88        );
 89        // Init allocated memory to zero
 90        std::ptr::write_bytes(ptr, 0, size);
 91        Vec::from_raw_parts(ptr, size, size)
 92    }
 93}
 94
 95/// Allocates a block of T aligned with [DEFAULTALIGN].
 96/// Size of T * size msut be a multiple of [DEFAULTALIGN].
 97pub fn alloc_aligned_custom<T>(size: usize, align: usize) -> Vec<T> {
 98    assert_eq!(
 99        (size * std::mem::size_of::<T>()) % align,
100        0,
101        "size={} must be a multiple of align={}",
102        size,
103        align
104    );
105    let mut vec_u8: Vec<u8> = alloc_aligned_custom_u8(std::mem::size_of::<T>() * size, align);
106    let ptr: *mut T = vec_u8.as_mut_ptr() as *mut T;
107    let len: usize = vec_u8.len() / std::mem::size_of::<T>();
108    let cap: usize = vec_u8.capacity() / std::mem::size_of::<T>();
109    std::mem::forget(vec_u8);
110    unsafe { Vec::from_raw_parts(ptr, len, cap) }
111}
112
113// Allocates an aligned of size equal to the smallest power of two equal or greater to `size` that is
114// at least as bit as DEFAULTALIGN / std::mem::size_of::<T>().
115pub fn alloc_aligned<T>(size: usize) -> Vec<T> {
116    alloc_aligned_custom::<T>(
117        std::cmp::max(
118            size.next_power_of_two(),
119            DEFAULTALIGN / std::mem::size_of::<T>(),
120        ),
121        DEFAULTALIGN,
122    )
123}