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using System; using System.IO; using System.Text; namespace AlexClarai { class Program { static void Main(string[] args) { using (var binaryStream = new BinaryStream()) { binaryStream.Write(true, true, true); binaryStream.Write(false, false, false); binaryStream.Write(true, true, true); binaryStream.Write(false, false, false); binaryStream.Write(true, false, true); binaryStream.Write(true, true, false); binaryStream.Write(true, true, true); binaryStream.Write(false, false, false); binaryStream.Write(true, true, true); binaryStream.Write(false, false, false); binaryStream.Write(true, false, true); binaryStream.Write(true, true, false); binaryStream.Write(true, true); binaryStream.Flush(); Console.WriteLine(binaryStream.ToBitString(true)); using (var fileStream = new FileStream("C:/bits.bit", FileMode.Create)) { binaryStream.WriteTo(fileStream); } } Console.ReadLine(); } } /// <summary> /// Stream umožňující zápis jednotlivých bitů. /// </summary> public class BinaryStream : MemoryStream { // Pole celých bajtů, které se při naplněné zapíše // a ukazatel na aktuální pozici v něm. private byte[] byteBuffer = new byte[32]; private int byteIndex = 0; // Pole bitů (poslední, neúplný bajt), které se při // naplnění zapíše do pole bajtů a ukazatel na // aktuální pozici v něm. private byte bitBuffer = 0x00; private int bitIndex = 0; /// <summary> /// Meotda pro zápis jednoho či více samostatných bitů. /// </summary> /// <param name="bits">Pole bitů pro zápis.</param> public void Write(params bool[] bits) { foreach (var bit in bits) { // Posuneme bit buffer bitBuffer <<= 1; if (bit) bitBuffer |= 1; else bitBuffer |= 0; // Naplněno, zapíšeme bit buffer if (bitIndex++ == 7) { bitIndex = 0; // Posuneme byte buffer byteBuffer[byteIndex] = bitBuffer; // Naplněno, zapíšeme byte buffer if (byteIndex++ == byteBuffer.Length - 1) { byteIndex = 0; base.Write(byteBuffer, 0, byteBuffer.Length); } } } } /// <summary> /// Metoda, která zapíše do streamu obsah bufferu bajtů /// do aktuální pozice a odsadí do bajtu a zapíše buffer /// bitů. /// </summary> public override void Flush() { // Zapsat aktuální bajty base.Write(byteBuffer, 0, byteIndex); // Odsadit a zapsat bity base.Write(new byte[] { (byte)(bitBuffer << (8 - bitIndex)) }, 0, 1); } } public static class ExtensionMethods { /// <summary> /// Metoda vypisující v textové podobě binární podobu jednoho /// bajtu. /// </summary> /// <param name="buffer">Bajt k převedení na string.</param> /// <returns>Textová reprezentace bajtu.</returns> public static string ToBitString(this byte buffer) { var builder = new StringBuilder(); for (var i = 128; i > 0; i /= 2) { builder.Append((buffer & i) == 0 ? '0' : '1'); } return builder.ToString(); } /// <summary> /// Metoda vypisující celé pole bajtů v jejich textové podobě, /// volitelně oddělené mezerou. /// </summary> /// <param name="buffer">Pole bajtů k převedení na string.</param> /// <param name="delimit">Pravidvostní hodnota určující, zda rozdělit bajty mezerou.</param> /// <returns>Textová reprezentace pole bajtů.</returns> public static string ToBitString(this byte[] buffer, bool delimit = false) { var builder = new StringBuilder(); foreach (var individualBuffer in buffer) { builder.Append(individualBuffer.ToBitString()); if (delimit) builder.Append(' '); } return builder.ToString(); } /// <summary> /// Metoda vypisující binární obsah streamu v textové podobě, /// volitelně oddělený mezerami po jednom bajtu. /// </summary> /// <param name="stream">Stream k převedení na string.</param> /// <param name="delimit">Pravidvostní hodnota určující, zda rozdělit bajty mezerou.</param> /// <returns>Textová reprezentace streamu.</returns> /// <remarks> /// Určeno k ladění, nepoužívat na dlouhé streamy - čte celý stream najednou! /// </remarks> public static string ToBitString(this Stream stream, bool delimit = false) { if (!stream.CanSeek) throw new InvalidOperationException("Stream neumožňuje posouvání, nelze začít číst od počátku streamu."); stream.Seek(0, SeekOrigin.Begin); var buffer = new byte[stream.Length]; stream.Read(buffer, 0, buffer.Length); stream.Seek(0, SeekOrigin.End); return buffer.ToBitString(delimit); } } }
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