mirror of
https://github.com/gohugoio/hugo.git
synced 2024-06-30 17:19:25 +00:00
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
// Copyright 2022 The Hugo Authors. All rights reserved.
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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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// 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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package hugio
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import (
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"bytes"
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)
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// HasBytesWriter is a writer that will set Match to true if the given pattern
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// is found in the stream.
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type HasBytesWriter struct {
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Match bool
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Pattern []byte
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i int
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done bool
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buff []byte
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}
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func (h *HasBytesWriter) Write(p []byte) (n int, err error) {
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if h.done {
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return len(p), nil
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}
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if len(h.buff) == 0 {
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h.buff = make([]byte, len(h.Pattern)*2)
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}
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for i := range p {
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h.buff[h.i] = p[i]
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h.i++
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if h.i == len(h.buff) {
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// Shift left.
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copy(h.buff, h.buff[len(h.buff)/2:])
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h.i = len(h.buff) / 2
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}
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if bytes.Contains(h.buff, h.Pattern) {
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h.Match = true
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h.done = true
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return len(p), nil
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}
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}
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return len(p), nil
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}
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