76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
// SPDX-FileCopyrightText: 2023 The Pion community <https://pion.ly>
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// SPDX-License-Identifier: MIT
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// Package util provides auxiliary functions internally used in webrtc package
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package util
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import (
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"errors"
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"strings"
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"github.com/pion/randutil"
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)
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const (
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runesAlpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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)
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// Use global random generator to properly seed by crypto grade random.
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var globalMathRandomGenerator = randutil.NewMathRandomGenerator() // nolint:gochecknoglobals
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// MathRandAlpha generates a mathmatical random alphabet sequence of the requested length.
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func MathRandAlpha(n int) string {
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return globalMathRandomGenerator.GenerateString(n, runesAlpha)
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}
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// RandUint32 generates a mathmatical random uint32.
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func RandUint32() uint32 {
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return globalMathRandomGenerator.Uint32()
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}
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// FlattenErrs flattens multiple errors into one
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func FlattenErrs(errs []error) error {
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errs2 := []error{}
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for _, e := range errs {
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if e != nil {
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errs2 = append(errs2, e)
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}
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}
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if len(errs2) == 0 {
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return nil
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}
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return multiError(errs2)
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}
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type multiError []error //nolint:errname
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func (me multiError) Error() string {
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var errstrings []string
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for _, err := range me {
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if err != nil {
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errstrings = append(errstrings, err.Error())
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}
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}
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if len(errstrings) == 0 {
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return "multiError must contain multiple error but is empty"
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}
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return strings.Join(errstrings, "\n")
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}
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func (me multiError) Is(err error) bool {
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for _, e := range me {
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if errors.Is(e, err) {
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return true
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}
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if me2, ok := e.(multiError); ok { //nolint:errorlint
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if me2.Is(err) {
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return true
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}
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}
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}
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return false
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}
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