forked from jshiffer/matterbridge
37 lines
715 B
Go
37 lines
715 B
Go
|
// Copyright 2015 The Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package mdurl
|
||
|
|
|
||
|
|
func hexDigit(b byte) bool {
|
||
|
|
return digit(b) || b >= 'a' && b <= 'f' || b >= 'A' && b <= 'F'
|
||
|
|
}
|
||
|
|
|
||
|
|
func unhex(b byte) byte {
|
||
|
|
switch {
|
||
|
|
case digit(b):
|
||
|
|
return b - '0'
|
||
|
|
case b >= 'a' && b <= 'f':
|
||
|
|
return b - 'a' + 10
|
||
|
|
case b >= 'A' && b <= 'F':
|
||
|
|
return b - 'A' + 10
|
||
|
|
}
|
||
|
|
panic("unhex: not a hex digit")
|
||
|
|
}
|
||
|
|
|
||
|
|
func letter(b byte) bool {
|
||
|
|
return b >= 'a' && b <= 'z' || b >= 'A' && b <= 'Z'
|
||
|
|
}
|
||
|
|
|
||
|
|
func digit(b byte) bool {
|
||
|
|
return b >= '0' && b <= '9'
|
||
|
|
}
|
||
|
|
|
||
|
|
func byteToUpper(b byte) byte {
|
||
|
|
if b >= 'a' && b <= 'z' {
|
||
|
|
return b - 'a' + 'A'
|
||
|
|
}
|
||
|
|
return b
|
||
|
|
}
|