path_unix.go

     1  // Copyright 2011 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build aix || darwin || dragonfly || freebsd || (js && wasm) || linux || netbsd || openbsd || solaris
     6  
     7  package os
     8  
     9  const (
    10  	PathSeparator     = '/' // OS-specific path separator
    11  	PathListSeparator = ':' // OS-specific path list separator
    12  )
    13  
    14  // IsPathSeparator reports whether c is a directory separator character.
    15  func IsPathSeparator(c uint8) bool {
    16  	return PathSeparator == c
    17  }
    18  
    19  // basename removes trailing slashes and the leading directory name from path name.
    20  func basename(name string) string {
    21  	i := len(name) - 1
    22  	// Remove trailing slashes
    23  	for ; i > 0 && name[i] == '/'; i-- {
    24  		name = name[:i]
    25  	}
    26  	// Remove leading directory name
    27  	for i--; i >= 0; i-- {
    28  		if name[i] == '/' {
    29  			name = name[i+1:]
    30  			break
    31  		}
    32  	}
    33  
    34  	return name
    35  }
    36  
    37  // splitPath returns the base name and parent directory.
    38  func splitPath(path string) (string, string) {
    39  	// if no better parent is found, the path is relative from "here"
    40  	dirname := "."
    41  
    42  	// Remove all but one leading slash.
    43  	for len(path) > 1 && path[0] == '/' && path[1] == '/' {
    44  		path = path[1:]
    45  	}
    46  
    47  	i := len(path) - 1
    48  
    49  	// Remove trailing slashes.
    50  	for ; i > 0 && path[i] == '/'; i-- {
    51  		path = path[:i]
    52  	}
    53  
    54  	// if no slashes in path, base is path
    55  	basename := path
    56  
    57  	// Remove leading directory path
    58  	for i--; i >= 0; i-- {
    59  		if path[i] == '/' {
    60  			if i == 0 {
    61  				dirname = path[:1]
    62  			} else {
    63  				dirname = path[:i]
    64  			}
    65  			basename = path[i+1:]
    66  			break
    67  		}
    68  	}
    69  
    70  	return dirname, basename
    71  }
    72  
    73  func fixRootDirectory(p string) string {
    74  	return p
    75  }
    76
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