github.com/prattmic/llgo-embedded@v0.0.0-20150820070356-41cfecea0e1e/third_party/gofrontend/libgo/go/os/error_plan9.go (about)

     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  package os
     6  
     7  func isExist(err error) bool {
     8  	switch pe := err.(type) {
     9  	case nil:
    10  		return false
    11  	case *PathError:
    12  		err = pe.Err
    13  	case *LinkError:
    14  		err = pe.Err
    15  	}
    16  	return contains(err.Error(), " exists")
    17  }
    18  
    19  func isNotExist(err error) bool {
    20  	switch pe := err.(type) {
    21  	case nil:
    22  		return false
    23  	case *PathError:
    24  		err = pe.Err
    25  	case *LinkError:
    26  		err = pe.Err
    27  	}
    28  	return contains(err.Error(), "does not exist") || contains(err.Error(), "not found") ||
    29  		contains(err.Error(), "has been removed") || contains(err.Error(), "no parent")
    30  }
    31  
    32  func isPermission(err error) bool {
    33  	switch pe := err.(type) {
    34  	case nil:
    35  		return false
    36  	case *PathError:
    37  		err = pe.Err
    38  	case *LinkError:
    39  		err = pe.Err
    40  	}
    41  	return contains(err.Error(), "permission denied")
    42  }
    43  
    44  // contains is a local version of strings.Contains. It knows len(sep) > 1.
    45  func contains(s, sep string) bool {
    46  	n := len(sep)
    47  	c := sep[0]
    48  	for i := 0; i+n <= len(s); i++ {
    49  		if s[i] == c && s[i:i+n] == sep {
    50  			return true
    51  		}
    52  	}
    53  	return false
    54  }