Use libc from crates.io

The libc crate has newlib bindings now, so we don't have to maintain them in-tree anymore

1 files changed, 4 insertions, 17 deletions

diff --git a/ctr-std/src/sys/unix/memchr.rs b/ctr-std/src/sys/unix/memchr.rs
index d7e9c2b..ae8e3d0 100644
--- a/ctr-std/src/sys/unix/memchr.rs
+++ b/ctr-std/src/sys/unix/memchr.rs
@@ -28,24 +28,11 @@ pub fn memchr(needle: u8, haystack: &[u8]) -> Option<usize> {
 }
 
 pub fn memrchr(needle: u8, haystack: &[u8]) -> Option<usize> {
-
-    #[cfg(target_os = "linux")]
+    // turns out that newlib doesn't have memrchr(), so we
+    // use the fallback version instead
     fn memrchr_specific(needle: u8, haystack: &[u8]) -> Option<usize> {
-        use libc;
-
-        // GNU's memrchr() will - unlike memchr() - error if haystack is empty.
-        if haystack.is_empty() {return None}
-        let p = unsafe {
-            libc::memrchr(
-                haystack.as_ptr() as *const libc::c_void,
-                needle as libc::c_int,
-                haystack.len())
-        };
-        if p.is_null() {
-            None
-        } else {
-            Some(p as usize - (haystack.as_ptr() as usize))
-        }
+        ::sys_common::memchr::fallback::memrchr(needle, haystack)
     }
+
     memrchr_specific(needle, haystack)
 }