vortex-array 0.68.0

Vortex in memory columnar data format
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright the Vortex contributors

use std::fmt;

use humansize::DECIMAL;
use humansize::format_size;

use crate::ArrayRef;
use crate::display::extractor::TreeContext;
use crate::display::extractor::TreeExtractor;

/// Extractor that adds `nbytes=X (Y%)` to the header line.
pub struct NbytesExtractor;

impl TreeExtractor for NbytesExtractor {
    fn write_header(
        &self,
        array: &ArrayRef,
        ctx: &TreeContext,
        f: &mut fmt::Formatter<'_>,
    ) -> fmt::Result {
        let nbytes = array.nbytes();
        let total_size = ctx.parent_total_size().unwrap_or(nbytes);
        let percent = if total_size == 0 {
            0.0
        } else {
            100_f64 * nbytes as f64 / total_size as f64
        };
        write!(
            f,
            " nbytes={} ({:.2}%)",
            format_size(nbytes, DECIMAL),
            percent
        )
    }
}