54 lines
1.0 KiB
Go
54 lines
1.0 KiB
Go
// 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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func isExist(err error) bool {
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switch pe := err.(type) {
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case nil:
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return false
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case *PathError:
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err = pe.Err
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case *LinkError:
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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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func isNotExist(err error) bool {
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switch pe := err.(type) {
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case nil:
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return false
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case *PathError:
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err = pe.Err
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case *LinkError:
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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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func isPermission(err error) bool {
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switch pe := err.(type) {
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case nil:
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return false
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case *PathError:
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err = pe.Err
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case *LinkError:
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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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