1 files changed, 81 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..4bc8902389
--- /dev/null
+++ b/toolkit/components/xulstore/src/error.rs
@@ -0,0 +1,81 @@
+/* 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};
+use thiserror::Error;
+
+pub(crate) type XULStoreResult<T> = Result<T, XULStoreError>;
+
+#[derive(Debug, Error)]
+pub(crate) enum XULStoreError {
+    #[error("error converting bytes: {0:?}")]
+    ConvertBytes(#[from] Utf8Error),
+
+    #[error("error converting string: {0:?}")]
+    ConvertString(#[from] FromUtf16Error),
+
+    #[error("I/O error: {0:?}")]
+    IoError(#[from] IoError),
+
+    #[error("iteration is finished")]
+    IterationFinished,
+
+    #[error("JSON error: {0}")]
+    JsonError(#[from] SerdeJsonError),
+
+    #[error("error result {0}")]
+    NsResult(#[from] nsresult),
+
+    #[error("poison error getting read/write lock")]
+    PoisonError,
+
+    #[error("migrate error: {0:?}")]
+    RkvMigrateError(#[from] RkvMigrateError),
+
+    #[error("store error: {0:?}")]
+    RkvStoreError(#[from] RkvStoreError),
+
+    #[error("id or attribute name too long")]
+    IdAttrNameTooLong,
+
+    #[error("unavailable")]
+    Unavailable,
+
+    #[error("unexpected key: {0:?}")]
+    UnexpectedKey(String),
+
+    #[error("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<T> From<PoisonError<T>> for XULStoreError {
+    fn from(_: PoisonError<T>) -> XULStoreError {
+        XULStoreError::PoisonError
+    }
+}