Function nstd_sys::vec::nstd_vec_from_slice

#[no_mangle]
pub unsafe extern "C" fn nstd_vec_from_slice(
    slice: &NSTDSlice
) -> NSTDVec

Available on crate feature nstd_vec only.

Creates a new vector from a slice.

Parameters:

• const NSTDSlice *slice - The slice to copy data from.

Returns

NSTDVec vec - The new vector with a copy of slice’s contents.

Panics

This operation will panic if the slice’s stride is 0 or allocating fails.

Safety

The caller of this function must ensure that slice’s data is valid for reads.

Example

use nstd_sys::{
    core::slice::{nstd_core_slice_get, nstd_core_slice_new},
    vec::{nstd_vec_from_slice, nstd_vec_get, nstd_vec_len},
};

const SIZE: usize = core::mem::size_of::<u128>();

let numbers = [59237u128, 13953u128, 50285u128];
let numbers = nstd_core_slice_new(numbers.as_ptr().cast(), SIZE, 3);
unsafe {
    let mut vec = nstd_vec_from_slice(&numbers);
    for i in 0..nstd_vec_len(&vec) {
        let sv = nstd_core_slice_get(&numbers, i).cast::<u128>();
        let vv = nstd_vec_get(&vec, i).cast::<u128>();
        assert!(!sv.is_null() && !vv.is_null());
        assert!(*sv == *vv);
    }
}