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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [path/] [filepath/] [path_windows.go] - Blame information for rev 747

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Line No. Rev Author Line
1 747 jeremybenn 
// Copyright 2010 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 filepath
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import (
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        "strings"
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)
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func isSlash(c uint8) bool {
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        return c == '\\' || c == '/'
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}
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// IsAbs returns true if the path is absolute.
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func IsAbs(path string) (b bool) {
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        v := VolumeName(path)
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        if v == "" {
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                return false
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        }
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        path = path[len(v):]
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        if path == "" {
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                return false
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        }
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        return isSlash(path[0])
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}
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// VolumeName returns leading volume name.
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// Given "C:\foo\bar" it returns "C:" under windows.
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// Given "\\host\share\foo" it returns "\\host\share".
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// On other platforms it returns "".
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func VolumeName(path string) (v string) {
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        if len(path) < 2 {
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                return ""
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        }
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        // with drive letter
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        c := path[0]
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        if path[1] == ':' &&
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                ('0' <= c && c <= '9' || 'a' <= c && c <= 'z' ||
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                        'A' <= c && c <= 'Z') {
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                return path[:2]
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        }
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        // is it UNC
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        if l := len(path); l >= 5 && isSlash(path[0]) && isSlash(path[1]) &&
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                !isSlash(path[2]) && path[2] != '.' {
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                // first, leading `\\` and next shouldn't be `\`. its server name.
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                for n := 3; n < l-1; n++ {
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                        // second, next '\' shouldn't be repeated.
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                        if isSlash(path[n]) {
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                                n++
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                                // third, following something characters. its share name.
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                                if !isSlash(path[n]) {
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                                        if path[n] == '.' {
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                                                break
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                                        }
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                                        for ; n < l; n++ {
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                                                if isSlash(path[n]) {
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                                                        break
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                                                }
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                                        }
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                                        return path[:n]
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                                }
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                                break
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                        }
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                }
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        }
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        return ""
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}
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// HasPrefix tests whether the path p begins with prefix.
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// It ignores case while comparing.
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func HasPrefix(p, prefix string) bool {
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        if strings.HasPrefix(p, prefix) {
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                return true
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        }
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        return strings.HasPrefix(strings.ToLower(p), strings.ToLower(prefix))
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}

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