arrow-csv/src/lib.rs

// Licensed to the Apache Software Foundation (ASF) under one
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// distributed with this work for additional information
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// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
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//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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// software distributed under the License is distributed on an
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//! Transfer data between the Arrow memory format and CSV (comma-separated values).

pub mod reader;
pub mod writer;

pub use self::reader::infer_schema_from_files;
pub use self::reader::Reader;
pub use self::reader::ReaderBuilder;
pub use self::writer::Writer;
pub use self::writer::WriterBuilder;
use arrow_schema::ArrowError;

fn map_csv_error(error: csv::Error) -> ArrowError {
    match error.kind() {
        csv::ErrorKind::Io(error) => ArrowError::CsvError(error.to_string()),
        csv::ErrorKind::Utf8 { pos: _, err } => ArrowError::CsvError(format!(
            "Encountered UTF-8 error while reading CSV file: {err}"
        )),
        csv::ErrorKind::UnequalLengths {
            expected_len, len, ..
        } => ArrowError::CsvError(format!(
            "Encountered unequal lengths between records on CSV file. Expected {len} \
                 records, found {expected_len} records"
        )),
        _ => ArrowError::CsvError("Error reading CSV file".to_string()),
    }
}