// Copyright 2015-2020 Parity Technologies (UK) Ltd.
// This file is part of OpenEthereum.

// OpenEthereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// OpenEthereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.

//! Data format for importing/exporting blocks from disk
use std::str::FromStr;

/// Format for importing/exporting blocks
#[derive(Debug, PartialEq)]
pub enum DataFormat {
    Hex,
    Binary,
}

impl Default for DataFormat {
    fn default() -> Self {
        DataFormat::Binary
    }
}

impl FromStr for DataFormat {
    type Err = String;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "binary" | "bin" => Ok(DataFormat::Binary),
            "hex" => Ok(DataFormat::Hex),
            x => Err(format!("Invalid format: {}", x)),
        }
    }
}
