1 // Copyright 2023 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 //////////////////////////////////////////////////////////////////////////////// 16 17 //! Error Handling 18 19 use alloc::string::String; 20 use authgraph_wire::ErrorCode; 21 use coset::CoseError; 22 23 /// AuthGraph error type. 24 #[derive(Debug)] 25 pub struct Error(pub ErrorCode, pub String); 26 27 impl core::convert::From<CoseError> for Error { from(e: CoseError) -> Self28 fn from(e: CoseError) -> Self { 29 crate::ag_err!(InternalError, "CoseError: {}", e) 30 } 31 } 32 33 impl From<alloc::collections::TryReserveError> for Error { from(e: alloc::collections::TryReserveError) -> Self34 fn from(e: alloc::collections::TryReserveError) -> Self { 35 crate::ag_err!(MemoryAllocationFailed, "allocation of Vec failed: {:?}", e) 36 } 37 } 38 39 /// Macro to build an [`Error`] instance. 40 /// E.g. use: `ag_err!(InternalError, "some {} format", arg)`. 41 #[macro_export] 42 macro_rules! ag_err { 43 { $error_code:ident, $($arg:tt)+ } => { 44 Error(ErrorCode::$error_code, 45 alloc::format!("{}:{}: {}", file!(), line!(), format_args!($($arg)+))) }; 46 } 47 48 /// Macro to build an [`Error`] instance. 49 /// E.g. use: `ag_verr!(rc, "some {} format", arg)`. 50 #[macro_export] 51 macro_rules! ag_verr { 52 { $error_code:expr, $($arg:tt)+ } => { 53 Error($error_code, 54 alloc::format!("{}:{}: {}", file!(), line!(), format_args!($($arg)+))) }; 55 } 56