datafusion/proto/src/common.rs

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 datafusion_common::{internal_datafusion_err, internal_err, Result};

pub(crate) fn str_to_byte(s: &String, description: &str) -> Result<u8> {
    if s.len() != 1 {
        return internal_err!(
            "Invalid CSV {description}: expected single character, got {s}"
        );
    }
    Ok(s.as_bytes()[0])
}

pub(crate) fn byte_to_string(b: u8, description: &str) -> Result<String> {
    let b = &[b];
    let b = std::str::from_utf8(b).map_err(|_| {
        internal_datafusion_err!(
            "Invalid CSV {description}: can not represent {b:0x?} as utf8"
        )
    })?;
    Ok(b.to_owned())
}

#[macro_export]
macro_rules! convert_required {
    ($PB:expr) => {{
        if let Some(field) = $PB.as_ref() {
            Ok(field.try_into()?)
        } else {
            Err(proto_error("Missing required field in protobuf"))
        }
    }};
}

#[macro_export]
macro_rules! into_required {
    ($PB:expr) => {{
        if let Some(field) = $PB.as_ref() {
            Ok(field.into())
        } else {
            Err(proto_error("Missing required field in protobuf"))
        }
    }};
}

#[macro_export]
macro_rules! convert_box_required {
    ($PB:expr) => {{
        if let Some(field) = $PB.as_ref() {
            field.as_ref().try_into()
        } else {
            Err(proto_error("Missing required field in protobuf"))
        }
    }};
}