mirror of
https://github.com/minio/minio-rs.git
synced 2025-12-06 23:36:52 +08:00
65 lines
1.7 KiB
Rust
65 lines
1.7 KiB
Rust
// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
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// Copyright 2025 MinIO, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use futures_io::AsyncRead;
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use std::io;
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use std::pin::Pin;
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use std::task::{Context, Poll};
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pub struct RandReader {
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size: u64,
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}
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impl RandReader {
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#[allow(dead_code)]
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pub fn new(size: u64) -> RandReader {
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RandReader { size }
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}
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}
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impl io::Read for RandReader {
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fn read(&mut self, buf: &mut [u8]) -> Result<usize, io::Error> {
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let bytes_read = buf.len().min(self.size as usize);
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if bytes_read > 0 {
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let random: &mut dyn rand::RngCore = &mut rand::rng();
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random.fill_bytes(&mut buf[0..bytes_read]);
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}
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self.size -= bytes_read as u64;
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Ok(bytes_read)
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}
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}
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impl AsyncRead for RandReader {
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fn poll_read(
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self: Pin<&mut Self>,
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_cx: &mut Context<'_>,
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buf: &mut [u8],
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) -> Poll<io::Result<usize>> {
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let bytes_read = buf.len().min(self.size as usize);
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if bytes_read > 0 {
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let random: &mut dyn rand::RngCore = &mut rand::rng();
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random.fill_bytes(&mut buf[0..bytes_read]);
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}
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self.get_mut().size -= bytes_read as u64;
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Poll::Ready(Ok(bytes_read))
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}
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}
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