1 files changed, 71 insertions, 0 deletions
diff --git a/vendor/git2/src/buf.rs b/vendor/git2/src/buf.rs
new file mode 100644
index 000000000..fd2bcbf96
--- /dev/null
+++ b/vendor/git2/src/buf.rs
@@ -0,0 +1,71 @@
+use std::ops::{Deref, DerefMut};
+use std::ptr;
+use std::slice;
+use std::str;
+
+use crate::raw;
+use crate::util::Binding;
+
+/// A structure to wrap an intermediate buffer used by libgit2.
+///
+/// A buffer can be thought of a `Vec<u8>`, but the `Vec` type is not used to
+/// avoid copying data back and forth.
+pub struct Buf {
+    raw: raw::git_buf,
+}
+
+impl Default for Buf {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Buf {
+    /// Creates a new empty buffer.
+    pub fn new() -> Buf {
+        crate::init();
+        unsafe {
+            Binding::from_raw(&mut raw::git_buf {
+                ptr: ptr::null_mut(),
+                size: 0,
+                reserved: 0,
+            } as *mut _)
+        }
+    }
+
+    /// Attempt to view this buffer as a string slice.
+    ///
+    /// Returns `None` if the buffer is not valid utf-8.
+    pub fn as_str(&self) -> Option<&str> {
+        str::from_utf8(&**self).ok()
+    }
+}
+
+impl Deref for Buf {
+    type Target = [u8];
+    fn deref(&self) -> &[u8] {
+        unsafe { slice::from_raw_parts(self.raw.ptr as *const u8, self.raw.size as usize) }
+    }
+}
+
+impl DerefMut for Buf {
+    fn deref_mut(&mut self) -> &mut [u8] {
+        unsafe { slice::from_raw_parts_mut(self.raw.ptr as *mut u8, self.raw.size as usize) }
+    }
+}
+
+impl Binding for Buf {
+    type Raw = *mut raw::git_buf;
+    unsafe fn from_raw(raw: *mut raw::git_buf) -> Buf {
+        Buf { raw: *raw }
+    }
+    fn raw(&self) -> *mut raw::git_buf {
+        &self.raw as *const _ as *mut _
+    }
+}
+
+impl Drop for Buf {
+    fn drop(&mut self) {
+        unsafe { raw::git_buf_dispose(&mut self.raw) }
+    }
+}