Function search_buffer 

pub unsafe fn search_buffer<T: PartialEq>(
    needle: &T,
    haystack: *const T,
) -> usize

Unsafely hunt through memory until an item is found

This is mostly used when a WinAPI function allocates a nul-terminated buffer of u16s. Use this to find the location of the nul, then use std::slice::from_raw_parts to build a slice.

Safety

This function assumes that:

• haystack points to an aligned buffer of Ts
• There is a needle somewhere in haystack
• Every value in haystack can be dereferenced

use windows_permissions::utilities::{search_buffer, buf_from_os};
use std::ffi::OsString;

let items = ['H' as u16, 'e' as u16, 'l' as u16, 'l' as u16, 'o' as u16, 0x00, 0xBA, 0xDD];
let ptr = items.as_ptr();

let position = unsafe { search_buffer(&0x00, ptr) };
let valid_items = unsafe { std::slice::from_raw_parts(ptr, position + 1) };

assert_eq!(position, 5);
assert_eq!(valid_items, &buf_from_os(&OsString::from("Hello"))[..]);