1 files changed, 259 insertions, 0 deletions
diff --git a/vendor/git2/src/oid.rs b/vendor/git2/src/oid.rs
new file mode 100644
index 0000000..145458a
--- /dev/null
+++ b/vendor/git2/src/oid.rs
@@ -0,0 +1,259 @@
+use libc;
+use std::cmp::Ordering;
+use std::fmt;
+use std::hash::{Hash, Hasher};
+use std::path::Path;
+use std::str;
+
+use crate::{raw, Error, IntoCString, ObjectType};
+
+use crate::util::{c_cmp_to_ordering, Binding};
+
+/// Unique identity of any object (commit, tree, blob, tag).
+#[derive(Copy, Clone)]
+#[repr(C)]
+pub struct Oid {
+    raw: raw::git_oid,
+}
+
+impl Oid {
+    /// Parse a hex-formatted object id into an Oid structure.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the string is empty, is longer than 40 hex
+    /// characters, or contains any non-hex characters.
+    pub fn from_str(s: &str) -> Result<Oid, Error> {
+        crate::init();
+        let mut raw = raw::git_oid {
+            id: [0; raw::GIT_OID_RAWSZ],
+        };
+        unsafe {
+            try_call!(raw::git_oid_fromstrn(
+                &mut raw,
+                s.as_bytes().as_ptr() as *const libc::c_char,
+                s.len() as libc::size_t
+            ));
+        }
+        Ok(Oid { raw })
+    }
+
+    /// Parse a raw object id into an Oid structure.
+    ///
+    /// If the array given is not 20 bytes in length, an error is returned.
+    pub fn from_bytes(bytes: &[u8]) -> Result<Oid, Error> {
+        crate::init();
+        let mut raw = raw::git_oid {
+            id: [0; raw::GIT_OID_RAWSZ],
+        };
+        if bytes.len() != raw::GIT_OID_RAWSZ {
+            Err(Error::from_str("raw byte array must be 20 bytes"))
+        } else {
+            unsafe {
+                try_call!(raw::git_oid_fromraw(&mut raw, bytes.as_ptr()));
+            }
+            Ok(Oid { raw })
+        }
+    }
+
+    /// Creates an all zero Oid structure.
+    pub fn zero() -> Oid {
+        let out = raw::git_oid {
+            id: [0; raw::GIT_OID_RAWSZ],
+        };
+        Oid { raw: out }
+    }
+
+    /// Hashes the provided data as an object of the provided type, and returns
+    /// an Oid corresponding to the result. This does not store the object
+    /// inside any object database or repository.
+    pub fn hash_object(kind: ObjectType, bytes: &[u8]) -> Result<Oid, Error> {
+        crate::init();
+
+        let mut out = raw::git_oid {
+            id: [0; raw::GIT_OID_RAWSZ],
+        };
+        unsafe {
+            try_call!(raw::git_odb_hash(
+                &mut out,
+                bytes.as_ptr() as *const libc::c_void,
+                bytes.len(),
+                kind.raw()
+            ));
+        }
+
+        Ok(Oid { raw: out })
+    }
+
+    /// Hashes the content of the provided file as an object of the provided type,
+    /// and returns an Oid corresponding to the result. This does not store the object
+    /// inside any object database or repository.
+    pub fn hash_file<P: AsRef<Path>>(kind: ObjectType, path: P) -> Result<Oid, Error> {
+        crate::init();
+
+        // Normal file path OK (does not need Windows conversion).
+        let rpath = path.as_ref().into_c_string()?;
+
+        let mut out = raw::git_oid {
+            id: [0; raw::GIT_OID_RAWSZ],
+        };
+        unsafe {
+            try_call!(raw::git_odb_hashfile(&mut out, rpath, kind.raw()));
+        }
+
+        Ok(Oid { raw: out })
+    }
+
+    /// View this OID as a byte-slice 20 bytes in length.
+    pub fn as_bytes(&self) -> &[u8] {
+        &self.raw.id
+    }
+
+    /// Test if this OID is all zeros.
+    pub fn is_zero(&self) -> bool {
+        unsafe { raw::git_oid_iszero(&self.raw) == 1 }
+    }
+}
+
+impl Binding for Oid {
+    type Raw = *const raw::git_oid;
+
+    unsafe fn from_raw(oid: *const raw::git_oid) -> Oid {
+        Oid { raw: *oid }
+    }
+    fn raw(&self) -> *const raw::git_oid {
+        &self.raw as *const _
+    }
+}
+
+impl fmt::Debug for Oid {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(self, f)
+    }
+}
+
+impl fmt::Display for Oid {
+    /// Hex-encode this Oid into a formatter.
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut dst = [0u8; raw::GIT_OID_HEXSZ + 1];
+        unsafe {
+            raw::git_oid_tostr(
+                dst.as_mut_ptr() as *mut libc::c_char,
+                dst.len() as libc::size_t,
+                &self.raw,
+            );
+        }
+        let s = &dst[..dst.iter().position(|&a| a == 0).unwrap()];
+        str::from_utf8(s).unwrap().fmt(f)
+    }
+}
+
+impl str::FromStr for Oid {
+    type Err = Error;
+
+    /// Parse a hex-formatted object id into an Oid structure.
+    ///
+    /// # Errors
+    ///
+    /// Returns an error if the string is empty, is longer than 40 hex
+    /// characters, or contains any non-hex characters.
+    fn from_str(s: &str) -> Result<Oid, Error> {
+        Oid::from_str(s)
+    }
+}
+
+impl PartialEq for Oid {
+    fn eq(&self, other: &Oid) -> bool {
+        unsafe { raw::git_oid_equal(&self.raw, &other.raw) != 0 }
+    }
+}
+impl Eq for Oid {}
+
+impl PartialOrd for Oid {
+    fn partial_cmp(&self, other: &Oid) -> Option<Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Ord for Oid {
+    fn cmp(&self, other: &Oid) -> Ordering {
+        c_cmp_to_ordering(unsafe { raw::git_oid_cmp(&self.raw, &other.raw) })
+    }
+}
+
+impl Hash for Oid {
+    fn hash<H: Hasher>(&self, into: &mut H) {
+        self.raw.id.hash(into)
+    }
+}
+
+impl AsRef<[u8]> for Oid {
+    fn as_ref(&self) -> &[u8] {
+        self.as_bytes()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::fs::File;
+    use std::io::prelude::*;
+
+    use super::Error;
+    use super::Oid;
+    use crate::ObjectType;
+    use tempfile::TempDir;
+
+    #[test]
+    fn conversions() {
+        assert!(Oid::from_str("foo").is_err());
+        assert!(Oid::from_str("decbf2be529ab6557d5429922251e5ee36519817").is_ok());
+        assert!(Oid::from_bytes(b"foo").is_err());
+        assert!(Oid::from_bytes(b"00000000000000000000").is_ok());
+    }
+
+    #[test]
+    fn comparisons() -> Result<(), Error> {
+        assert_eq!(Oid::from_str("decbf2b")?, Oid::from_str("decbf2b")?);
+        assert!(Oid::from_str("decbf2b")? <= Oid::from_str("decbf2b")?);
+        assert!(Oid::from_str("decbf2b")? >= Oid::from_str("decbf2b")?);
+        {
+            let o = Oid::from_str("decbf2b")?;
+            assert_eq!(o, o);
+            assert!(o <= o);
+            assert!(o >= o);
+        }
+        assert_eq!(
+            Oid::from_str("decbf2b")?,
+            Oid::from_str("decbf2b000000000000000000000000000000000")?
+        );
+        assert!(
+            Oid::from_bytes(b"00000000000000000000")? < Oid::from_bytes(b"00000000000000000001")?
+        );
+        assert!(Oid::from_bytes(b"00000000000000000000")? < Oid::from_str("decbf2b")?);
+        assert_eq!(
+            Oid::from_bytes(b"00000000000000000000")?,
+            Oid::from_str("3030303030303030303030303030303030303030")?
+        );
+        Ok(())
+    }
+
+    #[test]
+    fn zero_is_zero() {
+        assert!(Oid::zero().is_zero());
+    }
+
+    #[test]
+    fn hash_object() {
+        let bytes = "Hello".as_bytes();
+        assert!(Oid::hash_object(ObjectType::Blob, bytes).is_ok());
+    }
+
+    #[test]
+    fn hash_file() {
+        let td = TempDir::new().unwrap();
+        let path = td.path().join("hello.txt");
+        let mut file = File::create(&path).unwrap();
+        file.write_all("Hello".as_bytes()).unwrap();
+        assert!(Oid::hash_file(ObjectType::Blob, &path).is_ok());
+    }
+}