87 lines
2.3 KiB
C#
87 lines
2.3 KiB
C#
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using System;
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namespace HC
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{
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public class HCConvertUtils
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{
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public static string BytesToHexString(byte[] bytes, bool isUpperCase)
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{
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if (bytes == null)
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return "";
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char[] hexDigits = isUpperCase ? HEX_DIGITS_UPPER : HEX_DIGITS_LOWER;
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int len = bytes.Length;
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if (len == 0)
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return "";
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char[] ret = new char[len << 1];
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for (int i = 0, j = 0; i < len; i++)
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{
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ret[j++] = hexDigits[bytes[i] >> 4 & 0x0f];
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ret[j++] = hexDigits[bytes[i] & 0x0f];
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}
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return new string(ret);
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}
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public static byte[] HexStringToBytes(string hexString)
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{
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if (IsSpace(hexString))
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return new byte[0];
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int len = hexString.Length;
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if (len % 2 != 0)
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{
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hexString = "0" + hexString;
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len = len + 1;
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}
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char[] hexBytes = hexString.ToUpper().ToCharArray();
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byte[] ret = new byte[len >> 1];
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for (int i = 0; i < len; i += 2)
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{
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ret[i >> 1] = (byte)(HexToDec(hexBytes[i]) << 4 | HexToDec(hexBytes[i + 1]));
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}
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return ret;
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}
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public static bool IsSpace(string s)
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{
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if (s == null)
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return true;
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for (int i = 0, len = s.Length; i < len; ++i)
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{
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if (!char.IsWhiteSpace(s[i]))
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{
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return false;
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}
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}
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return true;
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}
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private static int HexToDec(char hexChar)
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{
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if (hexChar >= '0' && hexChar <= '9')
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{
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return hexChar - '0';
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}
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else if (hexChar >= 'A' && hexChar <= 'F')
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{
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return hexChar - 'A' + 10;
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}
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else
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{
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throw new ArgumentException();
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}
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}
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private static readonly char[] HEX_DIGITS_UPPER =
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{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
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private static readonly char[] HEX_DIGITS_LOWER =
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{ '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
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}
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}
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