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lineignorer.go
60 lines (52 loc) · 1.25 KB
/
lineignorer.go
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/*************************************************************************
* Copyright 2023 Gravwell, Inc. All rights reserved.
* Contact: <legal@gravwell.io>
*
* This software may be modified and distributed under the terms of the
* BSD 2-clause license. See the LICENSE file for details.
**************************************************************************/
package utils
import (
"bytes"
"unsafe"
"github.com/gobwas/glob"
)
type LineIgnorer struct {
prefixes [][]byte
globs []glob.Glob
}
func NewIgnorer(prefixes, globs []string) (*LineIgnorer, error) {
li := &LineIgnorer{}
for _, v := range prefixes {
if len(v) > 0 {
li.prefixes = append(li.prefixes, []byte(v))
}
}
for _, v := range globs {
c, err := glob.Compile(v)
if err != nil {
return nil, err
}
li.globs = append(li.globs, c)
}
return li, nil
}
// Ignore returns true if the given byte slice matches any of the prefixes or
// globs in the ignorer.
func (l *LineIgnorer) Ignore(b []byte) bool {
if len(b) == 0 {
return false
}
for _, prefix := range l.prefixes {
if bytes.HasPrefix(b, prefix) {
return true
}
}
bString := unsafe.String(&b[0], len(b))
for _, glob := range l.globs {
if glob.Match(bString) {
return true
}
}
return false
}