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Prevent race in Code128 constructor #2

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Oct 10, 2016
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Prevent race in Code128 constructor #2

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223 changes: 111 additions & 112 deletions PDFsharp/code/PdfSharp/PdfSharp.Drawing.BarCodes/Code128.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,117 @@ private Code128Type Code128Code
/// <summary>
/// A static place holder for the patterns to draw the code 128 barcode
/// </summary>
public static Dictionary<Byte, Byte[]> Patterns;
public static readonly Dictionary<Byte, Byte[]> Patterns = new Dictionary<Byte, Byte[]>
{
{ 0, new Byte[] { 2, 1, 2, 2, 2, 2 } },
{ 1, new Byte[] { 2, 2, 2, 1, 2, 2 } },
{ 2, new Byte[] { 2, 2, 2, 2, 2, 1 } },
{ 3, new Byte[] { 1, 2, 1, 2, 2, 3 } },
{ 4, new Byte[] { 1, 2, 1, 3, 2, 2 } },
{ 5, new Byte[] { 1, 3, 1, 2, 2, 2 } },
{ 6, new Byte[] { 1, 2, 2, 2, 1, 3 } },
{ 7, new Byte[] { 1, 2, 2, 3, 1, 2 } },
{ 8, new Byte[] { 1, 3, 2, 2, 1, 2 } },
{ 9, new Byte[] { 2, 2, 1, 2, 1, 3 } },
{ 10, new Byte[] { 2, 2, 1, 3, 1, 2 } },
{ 11, new Byte[] { 2, 3, 1, 2, 1, 2 } },
{ 12, new Byte[] { 1, 1, 2, 2, 3, 2 } },
{ 13, new Byte[] { 1, 2, 2, 1, 3, 2 } },
{ 14, new Byte[] { 1, 2, 2, 2, 3, 1 } },
{ 15, new Byte[] { 1, 1, 3, 2, 2, 2 } },
{ 16, new Byte[] { 1, 2, 3, 1, 2, 2 } },
{ 17, new Byte[] { 1, 2, 3, 2, 2, 1 } },
{ 18, new Byte[] { 2, 2, 3, 2, 1, 1 } },
{ 19, new Byte[] { 2, 2, 1, 1, 3, 2 } },
{ 20, new Byte[] { 2, 2, 1, 2, 3, 1 } },
{ 21, new Byte[] { 2, 1, 3, 2, 1, 2 } },
{ 22, new Byte[] { 2, 2, 3, 1, 1, 2 } },
{ 23, new Byte[] { 3, 1, 2, 1, 3, 1 } },
{ 24, new Byte[] { 3, 1, 1, 2, 2, 2 } },
{ 25, new Byte[] { 3, 2, 1, 1, 2, 2 } },
{ 26, new Byte[] { 3, 2, 1, 2, 2, 1 } },
{ 27, new Byte[] { 3, 1, 2, 2, 1, 2 } },
{ 28, new Byte[] { 3, 2, 2, 1, 1, 2 } },
{ 29, new Byte[] { 3, 2, 2, 2, 1, 1 } },
{ 30, new Byte[] { 2, 1, 2, 1, 2, 3 } },
{ 31, new Byte[] { 2, 1, 2, 3, 2, 1 } },
{ 32, new Byte[] { 2, 3, 2, 1, 2, 1 } },
{ 33, new Byte[] { 1, 1, 1, 3, 2, 3 } },
{ 34, new Byte[] { 1, 3, 1, 1, 2, 3 } },
{ 35, new Byte[] { 1, 3, 1, 3, 2, 1 } },
{ 36, new Byte[] { 1, 1, 2, 3, 1, 3 } },
{ 37, new Byte[] { 1, 3, 2, 1, 1, 3 } },
{ 38, new Byte[] { 1, 3, 2, 3, 1, 1 } },
{ 39, new Byte[] { 2, 1, 1, 3, 1, 3 } },
{ 40, new Byte[] { 2, 3, 1, 1, 1, 3 } },
{ 41, new Byte[] { 2, 3, 1, 3, 1, 1 } },
{ 42, new Byte[] { 1, 1, 2, 1, 3, 3 } },
{ 43, new Byte[] { 1, 1, 2, 3, 3, 1 } },
{ 44, new Byte[] { 1, 3, 2, 1, 3, 1 } },
{ 45, new Byte[] { 1, 1, 3, 1, 2, 3 } },
{ 46, new Byte[] { 1, 1, 3, 3, 2, 1 } },
{ 47, new Byte[] { 1, 3, 3, 1, 2, 1 } },
{ 48, new Byte[] { 3, 1, 3, 1, 2, 1 } },
{ 49, new Byte[] { 2, 1, 1, 3, 3, 1 } },
{ 50, new Byte[] { 2, 3, 1, 1, 3, 1 } },
{ 51, new Byte[] { 2, 1, 3, 1, 1, 3 } },
{ 52, new Byte[] { 2, 1, 3, 3, 1, 1 } },
{ 53, new Byte[] { 2, 1, 3, 1, 3, 1 } },
{ 54, new Byte[] { 3, 1, 1, 1, 2, 3 } },
{ 55, new Byte[] { 3, 1, 1, 3, 2, 1 } },
{ 56, new Byte[] { 3, 3, 1, 1, 2, 1 } },
{ 57, new Byte[] { 3, 1, 2, 1, 1, 3 } },
{ 58, new Byte[] { 3, 1, 2, 3, 1, 1 } },
{ 59, new Byte[] { 3, 3, 2, 1, 1, 1 } },
{ 60, new Byte[] { 3, 1, 4, 1, 1, 1 } },
{ 61, new Byte[] { 2, 2, 1, 4, 1, 1 } },
{ 62, new Byte[] { 4, 3, 1, 1, 1, 1 } },
{ 63, new Byte[] { 1, 1, 1, 2, 2, 4 } },
{ 64, new Byte[] { 1, 1, 1, 4, 2, 2 } },
{ 65, new Byte[] { 1, 2, 1, 1, 2, 4 } },
{ 66, new Byte[] { 1, 2, 1, 4, 2, 1 } },
{ 67, new Byte[] { 1, 4, 1, 1, 2, 2 } },
{ 68, new Byte[] { 1, 4, 1, 2, 2, 1 } },
{ 69, new Byte[] { 1, 1, 2, 2, 1, 4 } },
{ 70, new Byte[] { 1, 1, 2, 4, 1, 2 } },
{ 71, new Byte[] { 1, 2, 2, 1, 1, 4 } },
{ 72, new Byte[] { 1, 2, 2, 4, 1, 1 } },
{ 73, new Byte[] { 1, 4, 2, 1, 1, 2 } },
{ 74, new Byte[] { 1, 4, 2, 2, 1, 1 } },
{ 75, new Byte[] { 2, 4, 1, 2, 1, 1 } },
{ 76, new Byte[] { 2, 2, 1, 1, 1, 4 } },
{ 77, new Byte[] { 4, 1, 3, 1, 1, 1 } },
{ 78, new Byte[] { 2, 4, 1, 1, 1, 2 } },
{ 79, new Byte[] { 1, 3, 4, 1, 1, 1 } },
{ 80, new Byte[] { 1, 1, 1, 2, 4, 2 } },
{ 81, new Byte[] { 1, 2, 1, 1, 4, 2 } },
{ 82, new Byte[] { 1, 2, 1, 2, 4, 1 } },
{ 83, new Byte[] { 1, 1, 4, 2, 1, 2 } },
{ 84, new Byte[] { 1, 2, 4, 1, 1, 2 } },
{ 85, new Byte[] { 1, 2, 4, 2, 1, 1 } },
{ 86, new Byte[] { 4, 1, 1, 2, 1, 2 } },
{ 87, new Byte[] { 4, 2, 1, 1, 1, 2 } },
{ 88, new Byte[] { 4, 2, 1, 2, 1, 1 } },
{ 89, new Byte[] { 2, 1, 2, 1, 4, 1 } },
{ 90, new Byte[] { 2, 1, 4, 1, 2, 1 } },
{ 91, new Byte[] { 4, 1, 2, 1, 2, 1 } },
{ 92, new Byte[] { 1, 1, 1, 1, 4, 3 } },
{ 93, new Byte[] { 1, 1, 1, 3, 4, 1 } },
{ 94, new Byte[] { 1, 3, 1, 1, 4, 1 } },
{ 95, new Byte[] { 1, 1, 4, 1, 1, 3 } },
{ 96, new Byte[] { 1, 1, 4, 3, 1, 1 } },
{ 97, new Byte[] { 4, 1, 1, 1, 1, 3 } },
{ 98, new Byte[] { 4, 1, 1, 3, 1, 1 } },
{ 99, new Byte[] { 1, 1, 3, 1, 4, 1 } },
{ 100, new Byte[] { 1, 1, 4, 1, 3, 1 } },
{ 101, new Byte[] { 3, 1, 1, 1, 4, 1 } },
{ 102, new Byte[] { 4, 1, 1, 1, 3, 1 } },
{ 103, new Byte[] { 2, 1, 1, 4, 1, 2 } },
{ 104, new Byte[] { 2, 1, 1, 2, 1, 4 } },
{ 105, new Byte[] { 2, 1, 1, 2, 3, 2 } },
{ 106, new Byte[] { 2, 3, 3, 1, 1, 1, 2 } }
};

#endregion
#endregion
#region Methods
Expand Down Expand Up @@ -318,117 +428,6 @@ protected override void CheckCode(String text)
public Code128()
: base("", XSize.Empty, CodeDirection.LeftToRight)
{
if (Patterns == null)
{
Patterns = new Dictionary<Byte, Byte[]>();
Patterns.Add(0, new Byte[] { 2, 1, 2, 2, 2, 2 });
Patterns.Add(1, new Byte[] { 2, 2, 2, 1, 2, 2 });
Patterns.Add(2, new Byte[] { 2, 2, 2, 2, 2, 1 });
Patterns.Add(3, new Byte[] { 1, 2, 1, 2, 2, 3 });
Patterns.Add(4, new Byte[] { 1, 2, 1, 3, 2, 2 });
Patterns.Add(5, new Byte[] { 1, 3, 1, 2, 2, 2 });
Patterns.Add(6, new Byte[] { 1, 2, 2, 2, 1, 3 });
Patterns.Add(7, new Byte[] { 1, 2, 2, 3, 1, 2 });
Patterns.Add(8, new Byte[] { 1, 3, 2, 2, 1, 2 });
Patterns.Add(9, new Byte[] { 2, 2, 1, 2, 1, 3 });
Patterns.Add(10, new Byte[] { 2, 2, 1, 3, 1, 2 });
Patterns.Add(11, new Byte[] { 2, 3, 1, 2, 1, 2 });
Patterns.Add(12, new Byte[] { 1, 1, 2, 2, 3, 2 });
Patterns.Add(13, new Byte[] { 1, 2, 2, 1, 3, 2 });
Patterns.Add(14, new Byte[] { 1, 2, 2, 2, 3, 1 });
Patterns.Add(15, new Byte[] { 1, 1, 3, 2, 2, 2 });
Patterns.Add(16, new Byte[] { 1, 2, 3, 1, 2, 2 });
Patterns.Add(17, new Byte[] { 1, 2, 3, 2, 2, 1 });
Patterns.Add(18, new Byte[] { 2, 2, 3, 2, 1, 1 });
Patterns.Add(19, new Byte[] { 2, 2, 1, 1, 3, 2 });
Patterns.Add(20, new Byte[] { 2, 2, 1, 2, 3, 1 });
Patterns.Add(21, new Byte[] { 2, 1, 3, 2, 1, 2 });
Patterns.Add(22, new Byte[] { 2, 2, 3, 1, 1, 2 });
Patterns.Add(23, new Byte[] { 3, 1, 2, 1, 3, 1 });
Patterns.Add(24, new Byte[] { 3, 1, 1, 2, 2, 2 });
Patterns.Add(25, new Byte[] { 3, 2, 1, 1, 2, 2 });
Patterns.Add(26, new Byte[] { 3, 2, 1, 2, 2, 1 });
Patterns.Add(27, new Byte[] { 3, 1, 2, 2, 1, 2 });
Patterns.Add(28, new Byte[] { 3, 2, 2, 1, 1, 2 });
Patterns.Add(29, new Byte[] { 3, 2, 2, 2, 1, 1 });
Patterns.Add(30, new Byte[] { 2, 1, 2, 1, 2, 3 });
Patterns.Add(31, new Byte[] { 2, 1, 2, 3, 2, 1 });
Patterns.Add(32, new Byte[] { 2, 3, 2, 1, 2, 1 });
Patterns.Add(33, new Byte[] { 1, 1, 1, 3, 2, 3 });
Patterns.Add(34, new Byte[] { 1, 3, 1, 1, 2, 3 });
Patterns.Add(35, new Byte[] { 1, 3, 1, 3, 2, 1 });
Patterns.Add(36, new Byte[] { 1, 1, 2, 3, 1, 3 });
Patterns.Add(37, new Byte[] { 1, 3, 2, 1, 1, 3 });
Patterns.Add(38, new Byte[] { 1, 3, 2, 3, 1, 1 });
Patterns.Add(39, new Byte[] { 2, 1, 1, 3, 1, 3 });
Patterns.Add(40, new Byte[] { 2, 3, 1, 1, 1, 3 });
Patterns.Add(41, new Byte[] { 2, 3, 1, 3, 1, 1 });
Patterns.Add(42, new Byte[] { 1, 1, 2, 1, 3, 3 });
Patterns.Add(43, new Byte[] { 1, 1, 2, 3, 3, 1 });
Patterns.Add(44, new Byte[] { 1, 3, 2, 1, 3, 1 });
Patterns.Add(45, new Byte[] { 1, 1, 3, 1, 2, 3 });
Patterns.Add(46, new Byte[] { 1, 1, 3, 3, 2, 1 });
Patterns.Add(47, new Byte[] { 1, 3, 3, 1, 2, 1 });
Patterns.Add(48, new Byte[] { 3, 1, 3, 1, 2, 1 });
Patterns.Add(49, new Byte[] { 2, 1, 1, 3, 3, 1 });
Patterns.Add(50, new Byte[] { 2, 3, 1, 1, 3, 1 });
Patterns.Add(51, new Byte[] { 2, 1, 3, 1, 1, 3 });
Patterns.Add(52, new Byte[] { 2, 1, 3, 3, 1, 1 });
Patterns.Add(53, new Byte[] { 2, 1, 3, 1, 3, 1 });
Patterns.Add(54, new Byte[] { 3, 1, 1, 1, 2, 3 });
Patterns.Add(55, new Byte[] { 3, 1, 1, 3, 2, 1 });
Patterns.Add(56, new Byte[] { 3, 3, 1, 1, 2, 1 });
Patterns.Add(57, new Byte[] { 3, 1, 2, 1, 1, 3 });
Patterns.Add(58, new Byte[] { 3, 1, 2, 3, 1, 1 });
Patterns.Add(59, new Byte[] { 3, 3, 2, 1, 1, 1 });
Patterns.Add(60, new Byte[] { 3, 1, 4, 1, 1, 1 });
Patterns.Add(61, new Byte[] { 2, 2, 1, 4, 1, 1 });
Patterns.Add(62, new Byte[] { 4, 3, 1, 1, 1, 1 });
Patterns.Add(63, new Byte[] { 1, 1, 1, 2, 2, 4 });
Patterns.Add(64, new Byte[] { 1, 1, 1, 4, 2, 2 });
Patterns.Add(65, new Byte[] { 1, 2, 1, 1, 2, 4 });
Patterns.Add(66, new Byte[] { 1, 2, 1, 4, 2, 1 });
Patterns.Add(67, new Byte[] { 1, 4, 1, 1, 2, 2 });
Patterns.Add(68, new Byte[] { 1, 4, 1, 2, 2, 1 });
Patterns.Add(69, new Byte[] { 1, 1, 2, 2, 1, 4 });
Patterns.Add(70, new Byte[] { 1, 1, 2, 4, 1, 2 });
Patterns.Add(71, new Byte[] { 1, 2, 2, 1, 1, 4 });
Patterns.Add(72, new Byte[] { 1, 2, 2, 4, 1, 1 });
Patterns.Add(73, new Byte[] { 1, 4, 2, 1, 1, 2 });
Patterns.Add(74, new Byte[] { 1, 4, 2, 2, 1, 1 });
Patterns.Add(75, new Byte[] { 2, 4, 1, 2, 1, 1 });
Patterns.Add(76, new Byte[] { 2, 2, 1, 1, 1, 4 });
Patterns.Add(77, new Byte[] { 4, 1, 3, 1, 1, 1 });
Patterns.Add(78, new Byte[] { 2, 4, 1, 1, 1, 2 });
Patterns.Add(79, new Byte[] { 1, 3, 4, 1, 1, 1 });
Patterns.Add(80, new Byte[] { 1, 1, 1, 2, 4, 2 });
Patterns.Add(81, new Byte[] { 1, 2, 1, 1, 4, 2 });
Patterns.Add(82, new Byte[] { 1, 2, 1, 2, 4, 1 });
Patterns.Add(83, new Byte[] { 1, 1, 4, 2, 1, 2 });
Patterns.Add(84, new Byte[] { 1, 2, 4, 1, 1, 2 });
Patterns.Add(85, new Byte[] { 1, 2, 4, 2, 1, 1 });
Patterns.Add(86, new Byte[] { 4, 1, 1, 2, 1, 2 });
Patterns.Add(87, new Byte[] { 4, 2, 1, 1, 1, 2 });
Patterns.Add(88, new Byte[] { 4, 2, 1, 2, 1, 1 });
Patterns.Add(89, new Byte[] { 2, 1, 2, 1, 4, 1 });
Patterns.Add(90, new Byte[] { 2, 1, 4, 1, 2, 1 });
Patterns.Add(91, new Byte[] { 4, 1, 2, 1, 2, 1 });
Patterns.Add(92, new Byte[] { 1, 1, 1, 1, 4, 3 });
Patterns.Add(93, new Byte[] { 1, 1, 1, 3, 4, 1 });
Patterns.Add(94, new Byte[] { 1, 3, 1, 1, 4, 1 });
Patterns.Add(95, new Byte[] { 1, 1, 4, 1, 1, 3 });
Patterns.Add(96, new Byte[] { 1, 1, 4, 3, 1, 1 });
Patterns.Add(97, new Byte[] { 4, 1, 1, 1, 1, 3 });
Patterns.Add(98, new Byte[] { 4, 1, 1, 3, 1, 1 });
Patterns.Add(99, new Byte[] { 1, 1, 3, 1, 4, 1 });
Patterns.Add(100, new Byte[] { 1, 1, 4, 1, 3, 1 });
Patterns.Add(101, new Byte[] { 3, 1, 1, 1, 4, 1 });
Patterns.Add(102, new Byte[] { 4, 1, 1, 1, 3, 1 });
Patterns.Add(103, new Byte[] { 2, 1, 1, 4, 1, 2 });
Patterns.Add(104, new Byte[] { 2, 1, 1, 2, 1, 4 });
Patterns.Add(105, new Byte[] { 2, 1, 1, 2, 3, 2 });
Patterns.Add(106, new Byte[] { 2, 3, 3, 1, 1, 1, 2 });
}
this.code128Code = Code128Type.B;
}
/// <summary>
Expand Down