mirror of https://github.com/golang/go.git
52 lines
1.2 KiB
Go
52 lines
1.2 KiB
Go
// Copyright 2018 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 str
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import (
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"path/filepath"
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"strings"
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)
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// HasPathPrefix reports whether the slash-separated path s
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// begins with the elements in prefix.
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func HasPathPrefix(s, prefix string) bool {
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if len(s) == len(prefix) {
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return s == prefix
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}
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if prefix == "" {
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return true
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}
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if len(s) > len(prefix) {
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if prefix[len(prefix)-1] == '/' || s[len(prefix)] == '/' {
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return s[:len(prefix)] == prefix
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}
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}
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return false
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}
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// HasFilePathPrefix reports whether the filesystem path s
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// begins with the elements in prefix.
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func HasFilePathPrefix(s, prefix string) bool {
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sv := strings.ToUpper(filepath.VolumeName(s))
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pv := strings.ToUpper(filepath.VolumeName(prefix))
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s = s[len(sv):]
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prefix = prefix[len(pv):]
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switch {
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default:
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return false
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case sv != pv:
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return false
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case len(s) == len(prefix):
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return s == prefix
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case prefix == "":
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return true
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case len(s) > len(prefix):
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if prefix[len(prefix)-1] == filepath.Separator {
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return strings.HasPrefix(s, prefix)
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}
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return s[len(prefix)] == filepath.Separator && s[:len(prefix)] == prefix
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}
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}
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