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