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/* Copyright [2021] [Cerda] * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /// Enum representing each way the appication can fail. #[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)] pub enum Error { /// No errors occured, everything executed correctly. NoError, /// Parsing of command-line options failed. OptionParsingError, /// Selected and saved hash lengths differ. HashLengthDiffers, /// Parsing the hashes file failed. HashesFileParsingFailure, /// The specified amount of files do not match. NFilesDiffer(i32), } impl Error { /// Get the executable exit value from an `Error` instance. pub fn exit_value(&self) -> i32 { match *self { Error::NoError => 0, Error::OptionParsingError => 1, Error::HashLengthDiffers => 2, Error::HashesFileParsingFailure => 3, Error::NFilesDiffer(i) => i + 3, } } } impl From<i32> for Error { fn from(i: i32) -> Self { match i { 0 => Error::NoError, 1 => Error::OptionParsingError, 2 => Error::HashLengthDiffers, 3 => Error::HashesFileParsingFailure, i => Error::NFilesDiffer(i - 3), } } }