github.com/t2y/goofys@v0.19.1-0.20190123053037-27053313e616/internal/utils.go (about)

     1  // Copyright 2015 - 2017 Ka-Hing Cheung
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package internal
    16  
    17  import (
    18  	"fmt"
    19  	"time"
    20  	"unicode"
    21  
    22  	"github.com/jacobsa/fuse"
    23  )
    24  
    25  func MaxInt(a, b int) int {
    26  	if a > b {
    27  		return a
    28  	} else {
    29  		return b
    30  	}
    31  }
    32  
    33  func MinInt(a, b int) int {
    34  	if a < b {
    35  		return a
    36  	} else {
    37  		return b
    38  	}
    39  }
    40  
    41  func MaxUInt32(a, b uint32) uint32 {
    42  	if a > b {
    43  		return a
    44  	} else {
    45  		return b
    46  	}
    47  }
    48  
    49  func MinUInt32(a, b uint32) uint32 {
    50  	if a < b {
    51  		return a
    52  	} else {
    53  		return b
    54  	}
    55  }
    56  
    57  func MaxUInt64(a, b uint64) uint64 {
    58  	if a > b {
    59  		return a
    60  	} else {
    61  		return b
    62  	}
    63  }
    64  
    65  func MinUInt64(a, b uint64) uint64 {
    66  	if a < b {
    67  		return a
    68  	} else {
    69  		return b
    70  	}
    71  }
    72  
    73  func xattrEscape(value []byte) (s string) {
    74  	for _, c := range value {
    75  		if c == '%' {
    76  			s += "%25"
    77  		} else if unicode.IsPrint(rune(c)) {
    78  			s += string(c)
    79  		} else {
    80  			s += "%" + fmt.Sprintf("%02X", c)
    81  		}
    82  	}
    83  
    84  	return
    85  }
    86  
    87  func Dup(value []byte) []byte {
    88  	ret := make([]byte, len(value))
    89  	copy(ret, value)
    90  	return ret
    91  }
    92  
    93  func TryUnmount(mountPoint string) (err error) {
    94  	for i := 0; i < 20; i++ {
    95  		err = fuse.Unmount(mountPoint)
    96  		if err != nil {
    97  			time.Sleep(time.Second)
    98  		} else {
    99  			break
   100  		}
   101  	}
   102  	return
   103  }