1pub mod encoding;
  2#[allow(
  3    non_camel_case_types,
  4    non_snake_case,
  5    non_upper_case_globals,
  6    dead_code,
  7    improper_ctypes
  8)]
  9// Other modules and exports
 10pub mod ffi;
 11pub mod free;
 12pub mod infos;
 13pub mod module;
 14pub mod sampling;
 15pub mod stats;
 16pub mod svp;
 17pub mod vec_znx;
 18pub mod vec_znx_big;
 19pub mod vec_znx_dft;
 20pub mod vmp;
 21
 22pub use encoding::*;
 23pub use free::*;
 24pub use infos::*;
 25pub use module::*;
 26pub use sampling::*;
 27#[allow(unused_imports)]
 28pub use stats::*;
 29pub use svp::*;
 30pub use vec_znx::*;
 31pub use vec_znx_big::*;
 32pub use vec_znx_dft::*;
 33pub use vmp::*;
 34
 35pub const GALOISGENERATOR: u64 = 5;
 36pub const DEFAULTALIGN: usize = 64;
 37
 38fn is_aligned_custom<T>(ptr: *const T, align: usize) -> bool {
 39    (ptr as usize) % align == 0
 40}
 41
 42fn is_aligned<T>(ptr: *const T) -> bool {
 43    is_aligned_custom(ptr, DEFAULTALIGN)
 44}
 45
 46pub fn cast<T, V>(data: &[T]) -> &[V] {
 47    let ptr: *const V = data.as_ptr() as *const V;
 48    let len: usize = data.len() / std::mem::size_of::<V>();
 49    unsafe { std::slice::from_raw_parts(ptr, len) }
 50}
 51
 52pub fn cast_mut<T, V>(data: &[T]) -> &mut [V] {
 53    let ptr: *mut V = data.as_ptr() as *mut V;
 54    let len: usize = data.len() / std::mem::size_of::<V>();
 55    unsafe { std::slice::from_raw_parts_mut(ptr, len) }
 56}
 57
 58use std::alloc::{alloc, Layout};
 59use std::ptr;
 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.
 64pub fn 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: Layout = Layout::from_size_align(size, align).expect("Invalid alignment");
 79        let ptr: *mut u8 = 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        ptr::write_bytes(ptr, 0, size);
 91        Vec::from_raw_parts(ptr, size, size)
 92    }
 93}
 94
 95/// Allocates a block of bytes aligned with [DEFAULTALIGN].
 96/// Size must be amultiple of [DEFAULTALIGN].
 97/// /// Allocated memory is initialized to zero.
 98pub fn alloc_aligned_u8(size: usize) -> Vec<u8> {
 99    alloc_aligned_custom_u8(size, DEFAULTALIGN)
100}
101
102/// Allocates a block of T aligned with [DEFAULTALIGN].
103/// Size of T * size msut be a multiple of [DEFAULTALIGN].
104pub fn alloc_aligned_custom<T>(size: usize, align: usize) -> Vec<T> {
105    assert_eq!(
106        (size * std::mem::size_of::<T>()) % align,
107        0,
108        "size={} must be a multiple of align={}",
109        size,
110        align
111    );
112    let mut vec_u8: Vec<u8> = alloc_aligned_custom_u8(std::mem::size_of::<T>() * size, align);
113    let ptr: *mut T = vec_u8.as_mut_ptr() as *mut T;
114    let len: usize = vec_u8.len() / std::mem::size_of::<T>();
115    let cap: usize = vec_u8.capacity() / std::mem::size_of::<T>();
116    std::mem::forget(vec_u8);
117    unsafe { Vec::from_raw_parts(ptr, len, cap) }
118}
119
120pub fn alloc_aligned<T>(size: usize) -> Vec<T> {
121    alloc_aligned_custom::<T>(size, DEFAULTALIGN)
122}
123
124fn alias_mut_slice_to_vec<T>(slice: &[T]) -> Vec<T> {
125    unsafe {
126        let ptr: *mut T = slice.as_ptr() as *mut T;
127        let len: usize = slice.len();
128        Vec::from_raw_parts(ptr, len, len)
129    }
130}