/// <summary>
/// Reads next <paramref name="bitsCount"/> bits from byte array as <see cref="Int32"/>
/// </summary>
/// <param name="bitsCount"></param>
/// <returns>The 32-bit signed integer value of the specified amount of bits</returns>
/// <exception cref="ArgumentException">Thrown if <paramref name="bitsCount"/> is not in inclusive range [1, 32]</exception>
/// <exception cref="InvalidOperationException">Thrown if requested <paramref name="bitsCount"/> amount of bits couldn't be read</exception>
public int ReadInt32(int bitsCount = BitsCount.BitsPerDWord)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerDWord);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
int result = (int)GetSigned(bitsCount);
if (bitsCount == BitsCount.BitsPerDWord)
{
mBitsRead += bitsCount;
return(result);
}
int mask = (1 << bitsCount) - 1;
int signMask = 1 << (bitsCount - 1);
if ((result & signMask) != 0)
{
result |= ~mask;
}
mBitsRead += bitsCount;
return(result);
}
/// <summary>
/// Reads next <paramref name="bitsCount"/> bits from byte array as <see cref="Int16"/>
/// </summary>
/// <param name="bitsCount"></param>
/// <returns>The 16-bit signed integer value of the specified amount of bits</returns>
/// <exception cref="ArgumentException">Thrown if <paramref name="bitsCount"/> is not in inclusive range [1, 16]</exception>
/// <exception cref="InvalidOperationException">Thrown if requested <paramref name="bitsCount"/> amount of bits couldn't be read</exception>
public short ReadInt16(int bitsCount = BitsCount.BitsPerWord)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerWord);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
short result = (short)GetSigned(bitsCount);
if (bitsCount == BitsCount.BitsPerWord)
{
mBitsRead += bitsCount;
return(result);
}
var mask = (short)((1 << bitsCount) - 1);
var signMask = (short)(1 << (bitsCount - 1));
if ((result & signMask) != 0)
{
result |= (short)~mask;
}
mBitsRead += bitsCount;
return(result);
}
public sbyte ReadInt8(int bitsCount = BitsCount.BitsPerByte)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerByte);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
sbyte result = (sbyte)GetSigned(bitsCount);
if (bitsCount == BitsCount.BitsPerByte)
{
mBitsRead += bitsCount;
return(result);
}
var mask = (sbyte)((1 << bitsCount) - 1);
var signMask = (sbyte)(1 << (bitsCount - 1));
if ((result & signMask) != 0)
{
result |= (sbyte)~mask;
}
mBitsRead += bitsCount;
return(result);
}
public ushort ReadUInt16(int bitsCount = BitsCount.BitsPerWord)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerWord);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
var result = (ushort)GetUnsigned(bitsCount);
mBitsRead += bitsCount;
return(result);
}
/// <summary>
/// Reads next <paramref name="bitsCount"/> bits from byte array as <see cref="Byte"/>
/// </summary>
/// <param name="bitsCount"></param>
/// <returns>The 8-bit unsigned integer value of the specified amount of bits</returns>
/// <exception cref="ArgumentException">Thrown if <paramref name="bitsCount"/> is not in inclusive range [1, 8]</exception>
/// <exception cref="InvalidOperationException">Thrown if requested <paramref name="bitsCount"/> amount of bits couldn't be read</exception>
public byte ReadUInt8(int bitsCount = BitsCount.BitsPerByte)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerByte);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
var result = (byte)GetUnsigned(bitsCount);
mBitsRead += bitsCount;
return(result);
}
public ulong ReadUInt64(int bitsCount = BitsCount.BitsPerQWord)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerQWord);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
ulong result = GetUnsigned(bitsCount);
mBitsRead += bitsCount;
return(result);
}
/// <summary>
/// Reads next <paramref name="bitsCount"/> bits from byte array as <see cref="Int64"/>
/// </summary>
/// <param name="bitsCount"></param>
/// <returns>The 64-bit signed integer value of the specified amount of bits</returns>
/// <exception cref="ArgumentException">Thrown if <paramref name="bitsCount"/> is not in inclusive range [1, 64]</exception>
/// <exception cref="InvalidOperationException">Thrown if requested <paramref name="bitsCount"/> amount of bits couldn't be read</exception>
public long ReadInt64(int bitsCount = BitsCount.BitsPerQWord)
{
BitsCount.EnsureBitsCount(bitsCount, BitsCount.BitsPerQWord);
EnsureRequestedBitsCount(mBitsRead, bitsCount, mBitArray.Count);
long result = GetSigned(bitsCount);
if (bitsCount == BitsCount.BitsPerQWord)
{
mBitsRead += bitsCount;
return(result);
}
long mask;
if (bitsCount < 63)
{
mask = (1L << bitsCount) - 1;
}
else if (bitsCount == 63)
{
mask = long.MaxValue;
}
else
{
mask = -1;
}
long signMask = 1L << (bitsCount - 1);
if ((result & signMask) != 0)
{
result |= ~mask;
}
mBitsRead += bitsCount;
return(result);
}
