74 lines
2.9 KiB
C#
74 lines
2.9 KiB
C#
using System;
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namespace NSspi
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{
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/// <summary>
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/// Reads and writes value types to byte arrays with explicit endianness.
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/// </summary>
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public static class ByteWriter
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{
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// Big endian: Most significant byte at lowest address in memory.
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/// <summary>
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/// Writes a 2-byte signed integer to the buffer in big-endian format.
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/// </summary>
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/// <param name="value">The value to write to the buffer.</param>
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/// <param name="buffer">The buffer to write to.</param>
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/// <param name="position">The index of the first byte to write to.</param>
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public static void WriteInt16_BE( Int16 value, byte[] buffer, int position )
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{
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buffer[position + 0] = (byte)( value >> 8 );
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buffer[position + 1] = (byte)( value );
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}
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/// <summary>
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/// Writes a 4-byte signed integer to the buffer in big-endian format.
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/// </summary>
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/// <param name="value">The value to write to the buffer.</param>
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/// <param name="buffer">The buffer to write to.</param>
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/// <param name="position">The index of the first byte to write to.</param>
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public static void WriteInt32_BE( Int32 value, byte[] buffer, int position )
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{
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buffer[position + 0] = (byte)( value >> 24 );
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buffer[position + 1] = (byte)( value >> 16 );
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buffer[position + 2] = (byte)( value >> 8 );
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buffer[position + 3] = (byte)( value );
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}
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/// <summary>
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/// Reads a 2-byte signed integer that is stored in the buffer in big-endian format.
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/// The returned value is in the native endianness.
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/// </summary>
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/// <param name="buffer">The buffer to read.</param>
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/// <param name="position">The index of the first byte to read.</param>
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/// <returns></returns>
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public static Int16 ReadInt16_BE( byte[] buffer, int position )
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{
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Int16 value;
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value = (Int16)( buffer[position + 0] << 8 );
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value += (Int16)( buffer[position + 1] );
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return value;
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}
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/// <summary>
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/// Reads a 4-byte signed integer that is stored in the buffer in big-endian format.
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/// The returned value is in the native endianness.
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/// </summary>
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/// <param name="buffer">The buffer to read.</param>
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/// <param name="position">The index of the first byte to read.</param>
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/// <returns></returns>
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public static Int32 ReadInt32_BE( byte[] buffer, int position )
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{
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Int32 value;
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value = (Int32)( buffer[position + 0] << 24 );
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value |= (Int32)( buffer[position + 1] << 16 );
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value |= (Int32)( buffer[position + 2] << 8 );
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value |= (Int32)( buffer[position + 3] );
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return value;
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}
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}
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} |