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use futures::AsyncRead;
use super::{AsyncReader, ByteRecord};
use crate::error::{Error, Result};
pub async fn read_rows<R>(
reader: &mut AsyncReader<R>,
skip: usize,
rows: &mut [ByteRecord],
) -> Result<usize>
where
R: AsyncRead + Unpin + Send + Sync,
{
let mut row = ByteRecord::new();
for _ in 0..skip {
let res = reader.read_byte_record(&mut row).await;
if !res.unwrap_or(false) {
break;
}
}
let mut row_number = 0;
for row in rows.iter_mut() {
let has_more = reader
.read_byte_record(row)
.await
.map_err(|e| Error::External(format!(" at line {}", skip + row_number), Box::new(e)))?;
if !has_more {
break;
}
row_number += 1;
}
Ok(row_number)
}