package loader // Copyright 2010 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. // https://github.com/golang/go/blob/master/LICENSE // This file contains utilities to check for Windows absolute paths on Linux. // The code in this file was largely copied from the Golang filepath package // https://github.com/golang/go/blob/1d0e94b1e13d5e8a323a63cd1cc1ef95290c9c36/src/path/filepath/path_windows.go#L12-L65 func isSlash(c uint8) bool { return c == '\\' || c == '/' } // isAbs reports whether the path is a Windows absolute path. func isAbs(path string) (b bool) { l := volumeNameLen(path) if l == 0 { return false } path = path[l:] if path == "" { return false } return isSlash(path[0]) } // volumeNameLen returns length of the leading volume name on Windows. // It returns 0 elsewhere. // nolint: gocyclo func volumeNameLen(path string) int { if len(path) < 2 { return 0 } // with drive letter c := path[0] if path[1] == ':' && ('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z') { return 2 } // is it UNC? https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx if l := len(path); l >= 5 && isSlash(path[0]) && isSlash(path[1]) && !isSlash(path[2]) && path[2] != '.' { // first, leading `\\` and next shouldn't be `\`. its server name. for n := 3; n < l-1; n++ { // second, next '\' shouldn't be repeated. if isSlash(path[n]) { n++ // third, following something characters. its share name. if !isSlash(path[n]) { if path[n] == '.' { break } for ; n < l; n++ { if isSlash(path[n]) { break } } return n } break } } } return 0 }