mirror of
https://github.com/autc04/Retro68.git
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42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
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// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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// IsExist returns whether the error is known to report that a file already exists.
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func IsExist(err error) bool {
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if pe, ok := err.(*PathError); ok {
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err = pe.Err
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}
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return contains(err.Error(), " exists")
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}
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// IsNotExist returns whether the error is known to report that a file does not exist.
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func IsNotExist(err error) bool {
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if pe, ok := err.(*PathError); ok {
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err = pe.Err
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}
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return contains(err.Error(), "does not exist")
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}
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// IsPermission returns whether the error is known to report that permission is denied.
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func IsPermission(err error) bool {
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if pe, ok := err.(*PathError); ok {
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err = pe.Err
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}
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return contains(err.Error(), "permission denied")
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}
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// contains is a local version of strings.Contains. It knows len(sep) > 1.
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func contains(s, sep string) bool {
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n := len(sep)
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c := sep[0]
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for i := 0; i+n <= len(s); i++ {
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if s[i] == c && s[i:i+n] == sep {
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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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