src/symbols/rust_str.rs

use alloc::string::String;
use core::mem::MaybeUninit;
use core::ptr;
use core::slice;
use core::str;

#[export_name = "cxxbridge1$str$new"]
unsafe extern "C" fn str_new(this: &mut MaybeUninit<&str>) {
    ptr::write(this.as_mut_ptr(), "");
}

#[export_name = "cxxbridge1$str$ref"]
unsafe extern "C" fn str_ref<'a>(this: &mut MaybeUninit<&'a str>, string: &'a String) {
    ptr::write(this.as_mut_ptr(), string.as_str());
}

#[export_name = "cxxbridge1$str$from"]
unsafe extern "C" fn str_from(this: &mut MaybeUninit<&str>, ptr: *const u8, len: usize) -> bool {
    let slice = slice::from_raw_parts(ptr, len);
    match str::from_utf8(slice) {
        Ok(s) => {
            ptr::write(this.as_mut_ptr(), s);
            true
        }
        Err(_) => false,
    }
}

#[export_name = "cxxbridge1$str$ptr"]
unsafe extern "C" fn str_ptr(this: &&str) -> *const u8 {
    this.as_ptr()
}

#[export_name = "cxxbridge1$str$len"]
unsafe extern "C" fn str_len(this: &&str) -> usize {
    this.len()
}