// Copyright 2024 The Prometheus 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 utils import ( "bytes" "strings" ) func SafeDereference[T any](s ...*T) []T { var resolved []T for _, v := range s { if v != nil { resolved = append(resolved, *v) } else { var zeroValue T resolved = append(resolved, zeroValue) } } return resolved } // SafeBytesToString takes a slice of bytes and sanitizes it for Prometheus label // values. // * Terminate the string at the first null byte. // * Convert any invalid UTF-8 to "�". func SafeBytesToString(b []byte) string { var s string zeroIndex := bytes.IndexByte(b, 0) if zeroIndex == -1 { s = string(b) } else { s = string(b[:zeroIndex]) } return strings.ToValidUTF8(s, "�") }