Utility.cs

using System;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Text;

namespace eveMarshal
{

    public static class Utility
    {

        public static uint ToBigEndian(uint source)
        {
            return source >> 24 |
                   ((source << 8) & 0x00FF0000) |
                   ((source >> 8) & 0x0000FF00) |
                   (source << 24);
        }

        public static ushort ToBigEndian(ushort source)
        {
            return (ushort)(source >> 8 | source << 8);
        }

        public static byte[] StringToByteArray(string hex)
        {
            var ret = new byte[hex.Length / 2];
            for (int i = 0; i < hex.Length / 2; i++)
            {
                ret[i] = Convert.ToByte(hex.Substring((i * 2), 2), 16);
            }
            return ret;
        }

        public static string ByteArrayToString(byte[] data)
        {
            var r = new StringBuilder(data.Length * 2);
            foreach (var b in data)
                r.Append(b.ToString("X2"));
            return r.ToString();
        }

        public static void ReadFully(this Stream stream, byte[] buffer, int index, int length)
        {
            var left = length;
            while (left > 0)
            {
                int read = stream.Read(buffer, index, left);
                left -= read;
                index += read;
            }
        }

        public static void ReadFully(this Stream stream, byte[] buffer)
        {
            ReadFully(stream, buffer, 0, buffer.Length);
        }

        public static uint ReadSizeEx(this BinaryReader reader)
        {
            var len = reader.ReadByte();
            if (len == 0xFF)
                return reader.ReadUInt32();
            return len;
        }

        public static void WriteSizeEx(this BinaryWriter writer, uint len)
        {
            if (len < 0xFF)
                writer.Write((byte)len);
            else
            {
                writer.Write((byte)0xFF);
                writer.Write(len);
            }
        }

        public static void WriteSizeEx(this BinaryWriter writer, int len)
        {
            WriteSizeEx(writer, (uint)len);
        }

        public static string HexDump(byte[] bytes)
        {
            if (bytes == null) return "<null>";
            int len = bytes.Length;
            var result = new StringBuilder(((len + 15) / 16) * 78);
            var chars = new char[78];
            // fill all with blanks
            for (int i = 0; i < 75; i++)
                chars[i] = ' ';
            chars[76] = '\r';
            chars[77] = '\n';

            for (int i1 = 0; i1 < len; i1 += 16)
            {
                chars[0] = HexChar(i1 >> 28);
                chars[1] = HexChar(i1 >> 24);
                chars[2] = HexChar(i1 >> 20);
                chars[3] = HexChar(i1 >> 16);
                chars[4] = HexChar(i1 >> 12);
                chars[5] = HexChar(i1 >> 8);
                chars[6] = HexChar(i1 >> 4);
                chars[7] = HexChar(i1 >> 0);

                int offset1 = 11;
                int offset2 = 60;

                for (int i2 = 0; i2 < 16; i2++)
                {
                    if (i1 + i2 >= len)
                    {
                        chars[offset1] = ' ';
                        chars[offset1 + 1] = ' ';
                        chars[offset2] = ' ';
                    }
                    else
                    {
                        byte b = bytes[i1 + i2];
                        chars[offset1] = HexChar(b >> 4);
                        chars[offset1 + 1] = HexChar(b);
                        chars[offset2] = (b < 32 ? '·' : (char)b);
                    }
                    offset1 += (i2 == 7 ? 4 : 3);
                    offset2++;
                }
                result.Append(chars);
            }
            return result.ToString();
        }

        private static char HexChar(int value)
        {
            value &= 0xF;
            if (value >= 0 && value <= 9)
                return (char)('0' + value);
            return (char)('A' + (value - 10));
        }

        /// <summary>
        /// Reads the contents of the stream into a byte array.
        /// data is returned as a byte array. An IOException is
        /// thrown if any of the underlying IO calls fail.
        /// </summary>
        /// <param name="source">The stream to read.</param>
        /// <returns>A byte array containing the contents of the stream.</returns>
        /// <exception cref="NotSupportedException">The stream does not support reading.</exception>
        /// <exception cref="ObjectDisposedException">Methods were called after the stream was closed.</exception>
        /// <exception cref="System.IO.IOException">An I/O error occurs.</exception>
        public static byte[] ReadAllBytes(this Stream source)
        {
            var readBuffer = new byte[4096];

            int totalBytesRead = 0;
            int bytesRead;

            while ((bytesRead = source.Read(readBuffer, totalBytesRead, readBuffer.Length - totalBytesRead)) > 0)
            {
                totalBytesRead += bytesRead;

                if (totalBytesRead == readBuffer.Length)
                {
                    int nextByte = source.ReadByte();
                    if (nextByte != -1)
                    {
                        var temp = new byte[readBuffer.Length * 2];
                        Buffer.BlockCopy(readBuffer, 0, temp, 0, readBuffer.Length);
                        Buffer.SetByte(temp, totalBytesRead, (byte)nextByte);
                        readBuffer = temp;
                        totalBytesRead++;
                    }
                }
            }

            byte[] buffer = readBuffer;
            if (readBuffer.Length != totalBytesRead)
            {
                buffer = new byte[totalBytesRead];
                Buffer.BlockCopy(readBuffer, 0, buffer, 0, totalBytesRead);
            }
            return buffer;
        }

    }

    public static class Zlib
    {
        public static byte[] Decompress(byte[] input)
        {
            // two bytes shaved off (zlib header)
            var sourceStream = new MemoryStream(input, 2, input.Length - 2);
            var stream = new DeflateStream(sourceStream, CompressionMode.Decompress);
            return stream.ReadAllBytes();
        }
    }

    public static class Adler32
    {
        private const int ModuloPrime = 65521;

        public static uint Checksum(byte[] data)
        {
            uint checksum = 1;
            uint s1 = checksum & 0xFFFF;
            uint s2 = checksum >> 16;

            int len = data.Length;
            int i = 0;
            while (len > 0)
            {
                int maxDefer = 3800;
                if (maxDefer > len)
                    maxDefer = len;
                len -= maxDefer;
                while (--maxDefer >= 0)
                {
                    s1 = s1 + (uint)(data[i++] & 0xFF);
                    s2 = s2 + s1;
                }
                s1 %= ModuloPrime;
                s2 %= ModuloPrime;
            }

            checksum = (s2 << 16) | s1;
            return checksum;
        }
    }

    public static class Crc32
    {
        private static readonly uint[] _crc32Tab = new uint[]
                                              {
                                                  0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419,
                                                  0x706af48f, 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4,
                                                  0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07,
                                                  0x90bf1d91, 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
                                                  0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856,
                                                  0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
                                                  0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4,
                                                  0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
                                                  0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3,
                                                  0x45df5c75, 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a,
                                                  0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599,
                                                  0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
                                                  0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190,
                                                  0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f,
                                                  0x9fbfe4a5, 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e,
                                                  0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
                                                  0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed,
                                                  0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
                                                  0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3,
                                                  0xfbd44c65, 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
                                                  0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a,
                                                  0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5,
                                                  0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010,
                                                  0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
                                                  0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17,
                                                  0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6,
                                                  0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615,
                                                  0x73dc1683, 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
                                                  0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344,
                                                  0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
                                                  0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a,
                                                  0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
                                                  0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1,
                                                  0xa6bc5767, 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c,
                                                  0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef,
                                                  0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
                                                  0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe,
                                                  0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31,
                                                  0x2cd99e8b, 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c,
                                                  0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
                                                  0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b,
                                                  0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
                                                  0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1,
                                                  0x18b74777, 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
                                                  0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278,
                                                  0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7,
                                                  0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66,
                                                  0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
                                                  0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605,
                                                  0xcdd70693, 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8,
                                                  0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b,
                                                  0x2d02ef8d
                                              };

        public static uint Checksum(byte[] data)
        {
            uint crc = data.Aggregate(0xFFFFFFFF, (current, b) => (current >> 8) ^ _crc32Tab[b ^ (current & 0x000000FF)]);
            return ~crc;
        }
    }

}