diff options
Diffstat (limited to 'third_party/rust/webext-storage/src/ffi.rs')
-rw-r--r-- | third_party/rust/webext-storage/src/ffi.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/third_party/rust/webext-storage/src/ffi.rs b/third_party/rust/webext-storage/src/ffi.rs new file mode 100644 index 0000000000..dc4af8ed6e --- /dev/null +++ b/third_party/rust/webext-storage/src/ffi.rs @@ -0,0 +1,48 @@ +/* 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/. */ + +/// This module contains glue for the FFI, including error codes and a +/// `From<Error>` implementation for `ffi_support::ExternError`. These must be +/// implemented in this crate, and not `webext_storage_ffi`, because of Rust's +/// orphan rule for implementing traits (`webext_storage_ffi` can't implement +/// a trait in `ffi_support` for a type in `webext_storage`). +use ffi_support::{ErrorCode, ExternError}; + +use crate::error::{Error, ErrorKind, QuotaReason}; + +mod error_codes { + /// An unexpected error occurred which likely cannot be meaningfully handled + /// by the application. + pub const UNEXPECTED: i32 = 1; + + /// The application passed an invalid JSON string for a storage key or value. + pub const INVALID_JSON: i32 = 2; + + /// The total number of bytes stored in the database for this extension, + /// counting all key-value pairs serialized to JSON, exceeds the allowed limit. + pub const QUOTA_TOTAL_BYTES_EXCEEDED: i32 = 32; + + /// A single key-value pair exceeds the allowed byte limit when serialized + /// to JSON. + pub const QUOTA_ITEM_BYTES_EXCEEDED: i32 = 32 + 1; + + /// The total number of key-value pairs stored for this extension exceeded the + /// allowed limit. + pub const QUOTA_MAX_ITEMS_EXCEEDED: i32 = 32 + 2; +} + +impl From<Error> for ExternError { + fn from(err: Error) -> ExternError { + let code = ErrorCode::new(match err.kind() { + ErrorKind::JsonError(_) => error_codes::INVALID_JSON, + ErrorKind::QuotaError(QuotaReason::TotalBytes) => { + error_codes::QUOTA_TOTAL_BYTES_EXCEEDED + } + ErrorKind::QuotaError(QuotaReason::ItemBytes) => error_codes::QUOTA_ITEM_BYTES_EXCEEDED, + ErrorKind::QuotaError(QuotaReason::MaxItems) => error_codes::QUOTA_MAX_ITEMS_EXCEEDED, + _ => error_codes::UNEXPECTED, + }); + ExternError::new_error(code, err.to_string()) + } +} |