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| 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 library barback.utils; |
| 6 |
| 7 /// Converts a number in the range [0-255] to a two digit hex string. |
| 8 /// |
| 9 /// For example, given `255`, returns `ff`. |
| 10 String byteToHex(int byte) { |
| 11 assert(byte >= 0 && byte < 255); |
| 12 |
| 13 const DIGITS = "0123456789abcdef"; |
| 14 return DIGITS[(byte ~/ 16) % 16] + DIGITS[byte % 16]; |
| 15 } |
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