string: implement strcat, strcmp, strcpy, and strdup

2018-03-07 14:06:30 -08:00
parent 114ee16c21
commit 9f39456dbd
4 changed files with 27 additions and 19 deletions
@@ -32,18 +32,9 @@ use types::*;
 pub static mut errno: c_int = 0;

 pub unsafe fn c_str(s: *const c_char) -> &'static [u8] {
-    use core::slice;
+    use core::usize;

-    let mut size = 0;
-
-    loop {
-        if *s.offset(size) == 0 {
-            break;
-        }
-        size += 1;
-    }
-
-    slice::from_raw_parts(s as *const u8, size as usize)
+    c_str_n(s, usize::MAX)
 }

 pub unsafe fn c_str_n(s: *const c_char, n: usize) -> &'static [u8] {