1 //! Bindings to libgit2's raw `git_oidarray` type 2 3 use std::ops::Deref; 4 5 use crate::oid::Oid; 6 use crate::raw; 7 use crate::util::Binding; 8 use std::mem; 9 use std::slice; 10 11 /// An oid array structure used by libgit2 12 /// 13 /// Some apis return arrays of oids which originate from libgit2. This 14 /// wrapper type behaves a little like `Vec<&Oid>` but does so without copying 15 /// the underlying Oids until necessary. 16 pub struct OidArray { 17 raw: raw::git_oidarray, 18 } 19 20 impl Deref for OidArray { 21 type Target = [Oid]; 22 deref(&self) -> &[Oid]23 fn deref(&self) -> &[Oid] { 24 unsafe { 25 debug_assert_eq!(mem::size_of::<Oid>(), mem::size_of_val(&*self.raw.ids)); 26 27 slice::from_raw_parts(self.raw.ids as *const Oid, self.raw.count as usize) 28 } 29 } 30 } 31 32 impl Binding for OidArray { 33 type Raw = raw::git_oidarray; from_raw(raw: raw::git_oidarray) -> OidArray34 unsafe fn from_raw(raw: raw::git_oidarray) -> OidArray { 35 OidArray { raw } 36 } raw(&self) -> raw::git_oidarray37 fn raw(&self) -> raw::git_oidarray { 38 self.raw 39 } 40 } 41 42 impl<'repo> std::fmt::Debug for OidArray { fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error>43 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> { 44 f.debug_tuple("OidArray").field(&self.deref()).finish() 45 } 46 } 47 48 impl Drop for OidArray { drop(&mut self)49 fn drop(&mut self) { 50 unsafe { raw::git_oidarray_free(&mut self.raw) } 51 } 52 } 53