opensrv_clickhouse/binary/
uvarint.rs

1// Copyright 2021 Datafuse Labs.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7//     http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15// put_uvarint encodes a uint64 into buf and returns the number of bytes written.
16// If the buffer is too small, put_uvarint will panic.
17pub fn put_uvarint(mut buffer: impl AsMut<[u8]>, x: u64) -> usize {
18    let mut i = 0;
19    let mut mx = x;
20    let buf = buffer.as_mut();
21    while mx >= 0x80 {
22        buf[i] = mx as u8 | 0x80;
23        mx >>= 7;
24        i += 1;
25    }
26    buf[i] = mx as u8;
27    i + 1
28}
opensrv_clickhouse/binary/uvarint.rs

opensrv_clickhouse/binary/
uvarint.rs
