1 files changed, 83 insertions, 0 deletions
diff --git a/third_party/rust/zip/src/result.rs b/third_party/rust/zip/src/result.rs
new file mode 100644
index 0000000000..72a30e4881
--- /dev/null
+++ b/third_party/rust/zip/src/result.rs
@@ -0,0 +1,83 @@
+//! Error types that can be emitted from this library
+
+use std::error::Error;
+use std::fmt;
+use std::io;
+
+/// Generic result type with ZipError as its error variant
+pub type ZipResult<T> = Result<T, ZipError>;
+
+/// The given password is wrong
+#[derive(Debug)]
+pub struct InvalidPassword;
+
+impl fmt::Display for InvalidPassword {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        write!(fmt, "invalid password for file in archive")
+    }
+}
+
+impl Error for InvalidPassword {}
+
+/// Error type for Zip
+#[derive(Debug)]
+pub enum ZipError {
+    /// An Error caused by I/O
+    Io(io::Error),
+
+    /// This file is probably not a zip archive
+    InvalidArchive(&'static str),
+
+    /// This archive is not supported
+    UnsupportedArchive(&'static str),
+
+    /// The requested file could not be found in the archive
+    FileNotFound,
+}
+
+impl From<io::Error> for ZipError {
+    fn from(err: io::Error) -> ZipError {
+        ZipError::Io(err)
+    }
+}
+
+impl fmt::Display for ZipError {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            ZipError::Io(err) => write!(fmt, "{}", err),
+            ZipError::InvalidArchive(err) => write!(fmt, "invalid Zip archive: {}", err),
+            ZipError::UnsupportedArchive(err) => write!(fmt, "unsupported Zip archive: {}", err),
+            ZipError::FileNotFound => write!(fmt, "specified file not found in archive"),
+        }
+    }
+}
+
+impl Error for ZipError {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            ZipError::Io(err) => Some(err),
+            _ => None,
+        }
+    }
+}
+
+impl ZipError {
+    /// The text used as an error when a password is required and not supplied
+    ///
+    /// ```rust,no_run
+    /// # use zip::result::ZipError;
+    /// # let mut archive = zip::ZipArchive::new(std::io::Cursor::new(&[])).unwrap();
+    /// match archive.by_index(1) {
+    ///     Err(ZipError::UnsupportedArchive(ZipError::PASSWORD_REQUIRED)) => eprintln!("a password is needed to unzip this file"),
+    ///     _ => (),
+    /// }
+    /// # ()
+    /// ```
+    pub const PASSWORD_REQUIRED: &'static str = "Password required to decrypt file";
+}
+
+impl From<ZipError> for io::Error {
+    fn from(err: ZipError) -> io::Error {
+        io::Error::new(io::ErrorKind::Other, err)
+    }
+}