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// Copyright 2020 Alex Dukhno // // 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. use std::convert::TryFrom; /// PostgreSQL formats for transferring data /// `0` - textual representation /// `1` - binary representation #[derive(Debug, PartialEq, Clone, Copy)] pub enum PgFormat { /// data from/to client should be sent in text format Text, /// data from/to client should be sent in binary format Binary, } impl TryFrom<i16> for PgFormat { type Error = UnrecognizedFormat; fn try_from(value: i16) -> std::result::Result<Self, Self::Error> { match value { 0 => Ok(PgFormat::Text), 1 => Ok(PgFormat::Binary), other => Err(UnrecognizedFormat(other)), } } } /// Represents an error if frontend sent unrecognizable format /// contains the integer code that was sent #[derive(Debug)] pub struct UnrecognizedFormat(pub(crate) i16);