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1 | // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
1a4d82fc | 11 | // ignore-fast doesn't like extern crate |
970d7e83 | 12 | |
1a4d82fc JJ |
13 | extern crate libc; |
14 | use std::ffi::CString; | |
223e47cc | 15 | |
1a4d82fc JJ |
16 | mod mlibc { |
17 | use libc::{c_char, size_t}; | |
18 | ||
19 | extern { | |
223e47cc | 20 | #[link_name = "strlen"] |
1a4d82fc | 21 | pub fn my_strlen(str: *const c_char) -> size_t; |
223e47cc LB |
22 | } |
23 | } | |
24 | ||
1a4d82fc JJ |
25 | fn strlen(str: String) -> uint { |
26 | // C string is terminated with a zero | |
27 | let s = CString::from_slice(str.as_bytes()); | |
223e47cc | 28 | unsafe { |
1a4d82fc | 29 | mlibc::my_strlen(s.as_ptr()) as uint |
223e47cc LB |
30 | } |
31 | } | |
32 | ||
33 | pub fn main() { | |
1a4d82fc | 34 | let len = strlen("Rust".to_string()); |
970d7e83 | 35 | assert_eq!(len, 4u); |
223e47cc | 36 | } |