Decompress UInt : int « Data Types « C# / C Sharp

1. C# / C Sharp
2. Data Types
3. int

Decompress UInt

  

using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;


public static class Utility
{

    public static uint DecompressUInt(byte[] data)
    {
        if (data == null)
            throw new ArgumentNullException("data");

        if ((data[0] & 0x80 /* (1000000B) */) == 0  // ???????????0bbbbbbb B)   
            && data.Length == 1)
        {
            return (uint)data[0];
        }
        else if ((data[0] & 0xC0 /* (11000000B) */) == 0x80 /* (10000000B) */  // ???????????10bbbbbb bbbbbbbb B)   
            && data.Length == 2)
        {
            return (uint)((data[0] & 0x3F /* (00111111B) */) << 8 | data[1]);
        }
        else if ((data[0] & 0xE0 /* (11100000B) */) == 0xC0 /* (11000000B) */  // ???????????110bbbbb bbbbbbbb bbbbbbbb bbbbbbbb B?   
            && data.Length == 4)
        {
            return (uint)((data[0] & 0x1F /* (00011111B) */) << 24 | data[1] << 16 | data[2] << 8 | data[3]);
        }
        else
        {
            throw new NotSupportedException();
        }
    }
}

   
    
  

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