Function default_range_extractor

primitives/src/virtual/utils.rs:18–31

Extract indices from a range with overscan applied.

(
    range: std::ops::Range<usize>,
    overscan: usize,
    count: usize,
)

/// Extract indices from a range with overscan applied.
pub(crate) fn default_range_extractor(
    range: std::ops::Range<usize>,
    overscan: usize,
    count: usize,
) -> RangeInclusive<usize> {
    if count == 0 {
        return 0..=0;
    }

    let start = range.start.saturating_sub(overscan);
    let end = (range.end + overscan).min(count - 1);

    start..=end
}