48 lines
1.6 KiB
Go
48 lines
1.6 KiB
Go
// Licensed to Elasticsearch B.V. under one or more contributor
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// license agreements. See the NOTICE file distributed with
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// this work for additional information regarding copyright
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// ownership. Elasticsearch B.V. licenses this file to you under
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// the Apache License, Version 2.0 (the "License"); you may
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// 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,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package tcp
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import (
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"bufio"
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"bytes"
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)
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// factoryDelimiter return a function to split line using a custom delimiter supporting multibytes
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// delimiter, the delimiter is stripped from the returned value.
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func factoryDelimiter(delimiter []byte) bufio.SplitFunc {
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return func(data []byte, eof bool) (int, []byte, error) {
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if eof && len(data) == 0 {
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return 0, nil, nil
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}
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if i := bytes.Index(data, delimiter); i >= 0 {
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return i + len(delimiter), dropDelimiter(data[0:i], delimiter), nil
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}
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if eof {
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return len(data), dropDelimiter(data, delimiter), nil
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}
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return 0, nil, nil
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}
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}
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func dropDelimiter(data []byte, delimiter []byte) []byte {
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if len(data) > len(delimiter) &&
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bytes.Equal(data[len(data)-len(delimiter):len(data)], delimiter) {
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return data[0 : len(data)-len(delimiter)]
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}
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return data
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}
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