1 files changed, 122 insertions, 0 deletions
diff --git a/toolkit/components/xulstore/src/error.rs b/toolkit/components/xulstore/src/error.rs
new file mode 100644
index 0000000000..d1aaa023f9
--- /dev/null
+++ b/toolkit/components/xulstore/src/error.rs
@@ -0,0 +1,122 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use nserror::{
+    nsresult, NS_ERROR_FAILURE, NS_ERROR_ILLEGAL_VALUE, NS_ERROR_NOT_AVAILABLE, NS_ERROR_UNEXPECTED,
+};
+use rkv::{MigrateError as RkvMigrateError, StoreError as RkvStoreError};
+use serde_json::Error as SerdeJsonError;
+use std::{io::Error as IoError, str::Utf8Error, string::FromUtf16Error, sync::PoisonError};
+
+pub(crate) type XULStoreResult<T> = Result<T, XULStoreError>;
+
+#[derive(Debug, Fail)]
+pub(crate) enum XULStoreError {
+    #[fail(display = "error converting bytes: {:?}", _0)]
+    ConvertBytes(Utf8Error),
+
+    #[fail(display = "error converting string: {:?}", _0)]
+    ConvertString(FromUtf16Error),
+
+    #[fail(display = "I/O error: {:?}", _0)]
+    IoError(IoError),
+
+    #[fail(display = "iteration is finished")]
+    IterationFinished,
+
+    #[fail(display = "JSON error: {}", _0)]
+    JsonError(SerdeJsonError),
+
+    #[fail(display = "error result {}", _0)]
+    NsResult(nsresult),
+
+    #[fail(display = "poison error getting read/write lock")]
+    PoisonError,
+
+    #[fail(display = "migrate error: {:?}", _0)]
+    RkvMigrateError(RkvMigrateError),
+
+    #[fail(display = "store error: {:?}", _0)]
+    RkvStoreError(RkvStoreError),
+
+    #[fail(display = "id or attribute name too long")]
+    IdAttrNameTooLong,
+
+    #[fail(display = "unavailable")]
+    Unavailable,
+
+    #[fail(display = "unexpected key: {:?}", _0)]
+    UnexpectedKey(String),
+
+    #[fail(display = "unexpected value")]
+    UnexpectedValue,
+}
+
+impl From<XULStoreError> for nsresult {
+    fn from(err: XULStoreError) -> nsresult {
+        match err {
+            XULStoreError::ConvertBytes(_) => NS_ERROR_FAILURE,
+            XULStoreError::ConvertString(_) => NS_ERROR_FAILURE,
+            XULStoreError::IoError(_) => NS_ERROR_FAILURE,
+            XULStoreError::IterationFinished => NS_ERROR_FAILURE,
+            XULStoreError::JsonError(_) => NS_ERROR_FAILURE,
+            XULStoreError::NsResult(result) => result,
+            XULStoreError::PoisonError => NS_ERROR_UNEXPECTED,
+            XULStoreError::RkvMigrateError(_) => NS_ERROR_FAILURE,
+            XULStoreError::RkvStoreError(_) => NS_ERROR_FAILURE,
+            XULStoreError::IdAttrNameTooLong => NS_ERROR_ILLEGAL_VALUE,
+            XULStoreError::Unavailable => NS_ERROR_NOT_AVAILABLE,
+            XULStoreError::UnexpectedKey(_) => NS_ERROR_UNEXPECTED,
+            XULStoreError::UnexpectedValue => NS_ERROR_UNEXPECTED,
+        }
+    }
+}
+
+impl From<FromUtf16Error> for XULStoreError {
+    fn from(err: FromUtf16Error) -> XULStoreError {
+        XULStoreError::ConvertString(err)
+    }
+}
+
+impl From<nsresult> for XULStoreError {
+    fn from(result: nsresult) -> XULStoreError {
+        XULStoreError::NsResult(result)
+    }
+}
+
+impl<T> From<PoisonError<T>> for XULStoreError {
+    fn from(_: PoisonError<T>) -> XULStoreError {
+        XULStoreError::PoisonError
+    }
+}
+
+impl From<RkvMigrateError> for XULStoreError {
+    fn from(err: RkvMigrateError) -> XULStoreError {
+        XULStoreError::RkvMigrateError(err)
+    }
+}
+
+impl From<RkvStoreError> for XULStoreError {
+    fn from(err: RkvStoreError) -> XULStoreError {
+        XULStoreError::RkvStoreError(err)
+    }
+}
+
+impl From<Utf8Error> for XULStoreError {
+    fn from(err: Utf8Error) -> XULStoreError {
+        XULStoreError::ConvertBytes(err)
+    }
+}
+
+impl From<IoError> for XULStoreError {
+    fn from(err: IoError) -> XULStoreError {
+        XULStoreError::IoError(err)
+    }
+}
+
+impl From<SerdeJsonError> for XULStoreError {
+    fn from(err: SerdeJsonError) -> XULStoreError {
+        XULStoreError::JsonError(err)
+    }
+}