| // Copyright 2015 The LUCI Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package recordio |
| |
| // FrameHeaderSize calculates the size of the RecordIO frame header for a given |
| // amount of data. |
| // |
| // A RecordIO frame header is a Uvarint containing the length. Uvarint values |
| // contain 7 bits of size data and 1 continuation bit (see encoding/binary). |
| func FrameHeaderSize(s int64) int { |
| size := 1 |
| for s >>= 7; s > 0; s >>= 7 { |
| size++ |
| } |
| return size |
| } |
