61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
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package tun
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import (
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"errors"
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"fmt"
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)
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var (
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// ErrTooManySegments is returned by Device.Read() when segmentation
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// overflows the length of supplied buffers. This error should not cause
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// reads to cease.
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ErrTooManySegments = errors.New("too many segments")
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)
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type errorBatch []error
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// ErrorBatch takes a possibly nil or empty list of errors, and if the list is
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// non-nil returns an error type that wraps all of the errors. Expected usage is
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// to append to an []errors and coerce the set to an error using this method.
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func ErrorBatch(errs []error) error {
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if len(errs) == 0 {
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return nil
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}
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return errorBatch(errs)
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}
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func (e errorBatch) Error() string {
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if len(e) == 0 {
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return ""
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}
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if len(e) == 1 {
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return e[0].Error()
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}
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return fmt.Sprintf("batch operation: %v (and %d more errors)", e[0], len(e)-1)
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}
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func (e errorBatch) Is(target error) bool {
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for _, err := range e {
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if errors.Is(err, target) {
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return true
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}
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}
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return false
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}
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func (e errorBatch) As(target interface{}) bool {
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for _, err := range e {
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if errors.As(err, target) {
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return true
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}
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}
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return false
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}
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func (e errorBatch) Unwrap() error {
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if len(e) == 0 {
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return nil
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}
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return e[0]
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}
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