auto merge of #15421 : catharsis/rust/doc-ffi-minor-fixes, r=alexcrichton

[rust.git] / src / librustrt / c_str.rs

diff --git a/src/librustrt/c_str.rs b/src/librustrt/c_str.rs
index 06f4e71871d40ba4c3d36a483a1d62b8abcd5ef3..396d51f4fcb13a4128d62046199608646d72c385 100644 (file)
--- a/src/librustrt/c_str.rs
+++ b/src/librustrt/c_str.rs
@@ -69,6 +69,7 @@ fn main() {
 
 use alloc::libc_heap::malloc_raw;
 use collections::string::String;
+use collections::hash;
 use core::kinds::marker;
 use core::mem;
 use core::ptr;
@@ -116,6 +117,22 @@ fn eq(&self, other: &CString) -> bool {
     }
 }
 
+impl PartialOrd for CString {
+    #[inline]
+    fn partial_cmp(&self, other: &CString) -> Option<Ordering> {
+        self.as_bytes().partial_cmp(&other.as_bytes())
+    }
+}
+
+impl Eq for CString {}
+
+impl<S: hash::Writer> hash::Hash<S> for CString {
+    #[inline]
+    fn hash(&self, state: &mut S) {
+        self.as_bytes().hash(state)
+    }
+}
+
 impl CString {
     /// Create a C String from a pointer.
     pub unsafe fn new(buf: *const libc::c_char, owns_buffer: bool) -> CString {