/// <summary>
/// Check if two arrays of bits are equals
/// Returns true if every bit of this first array is equal to the corresponding bit of the second, false otherwise
/// </summary>
public static bool Equals(BitArray a, BitArray b)
{
if (a.Length != b.Length) return false;
var enumA = a.GetEnumerator();
var enumB = b.GetEnumerator();
while (enumA.MoveNext() && enumB.MoveNext())
{
if ((bool)enumA.Current != (bool)enumB.Current) return false;
}
return true;
}
static public int GetEnumerator(IntPtr l)
{
try {
System.Collections.BitArray self = (System.Collections.BitArray)checkSelf(l);
var ret = self.GetEnumerator();
pushValue(l, true);
pushValue(l, ret);
return(2);
}
catch (Exception e) {
return(error(l, e));
}
}
/// <summary>
/// Check if two arrays of bits are equals
/// </summary>
/// <param name="sourceData">Source data</param>
/// <param name="targetData">Target data</param>
/// <returns>Return whether </returns>
public static bool Compare(this BitArray sourceData, BitArray targetData)
{
if (sourceData == null || targetData == null || sourceData.Length != targetData.Length)
{
return(false);
}
var sourceDataEnumerator = sourceData.GetEnumerator();
var targetDataEnumerator = targetData.GetEnumerator();
while (sourceDataEnumerator.MoveNext() && targetDataEnumerator.MoveNext())
{
if ((bool)sourceDataEnumerator.Current != (bool)targetDataEnumerator.Current)
{
return(false);
}
}
return(true);
}
public void InsertMessage(string message)
{
Stopwatch watch = new Stopwatch();
watch.Start();
var dataToEncode = Encoding.ASCII.GetBytes(message);
byte[] dataWithMeta = new byte[dataToEncode.Length + MessageLength + MessageLengthPadding];
//four bytes for message length; 2 bytes for padding
var messageLengthInfo = BitConverter.GetBytes(message.Length);
Array.Copy(messageLengthInfo, dataWithMeta, MessageLength);
Array.Copy(dataToEncode, 0, dataWithMeta, MessageLength + MessageLengthPadding, dataToEncode.Length);
BitArray bits = new BitArray(dataWithMeta);
var e = bits.GetEnumerator();
var bmpPixelEnumerator = new BitmapPixelEnumerator(_img);
foreach (Pixel pixel in bmpPixelEnumerator)
{
byte oldBlue = pixel.Blue;
byte oldGreen = pixel.Green;
byte oldRed = pixel.Red;
byte newBlue;
if (InsertData(e, oldBlue, out newBlue)) return;
_copy.SetPixel(pixel.X, pixel.Y, Color.FromArgb(newBlue, oldGreen, oldRed));
byte newGreen;
if (InsertData(e, oldGreen, out newGreen)) return;
_copy.SetPixel(pixel.X, pixel.Y, Color.FromArgb(newBlue, newGreen, oldRed));
byte newRed;
if (InsertData(e, oldRed, out newRed)) return;
_copy.SetPixel(pixel.X, pixel.Y, Color.FromArgb(newBlue, newGreen, newRed));
}
watch.Stop();
Debug.WriteLine(watch.Elapsed);
}
public static void BitArray_GetEnumeratorTest_Negative()
{
int size = 10;
Boolean[] bolArr1 = new Boolean[size];
for (int i = 0; i < size; i++)
{
if (i > 5)
bolArr1[i] = true;
else
bolArr1[i] = false;
}
BitArray bitArr1 = new BitArray(bolArr1);
IEnumerator ienm1 = bitArr1.GetEnumerator();
// test that initially enumerator is positioned before the first element in the collection --> Current will be undefined
Assert.Throws<InvalidOperationException>(delegate { Object obj = ienm1.Current; }); //"Err_40! wrong exception thrown."
// get to the end of the collection
while (ienm1.MoveNext()) ;
// test that after MoveNext() returns false (i.e. we are at the end) enumerator is positioned after the last element in the collection --> Current will be undefined
Assert.Throws<InvalidOperationException>(delegate { Object obj = ienm1.Current; }); //"Err_41! wrong exception thrown."
//[] we will change the underlying BitArray and see the effect
ienm1.Reset();
ienm1.MoveNext();
bitArr1[0] = false;
// we do not throw exception when getting Current
Object obj2 = ienm1.Current;
// test that the enumerator is not valid after modifying collection
Assert.Throws<InvalidOperationException>(delegate { ienm1.MoveNext(); }); //"Err_42! wrong exception thrown."
Assert.Throws<InvalidOperationException>(delegate { ienm1.Reset(); }); //"Err_43! wrong exception thrown."
}
public static void BitArray_GetEnumeratorTest()
{
int size = 10;
Boolean[] bolArr1 = new Boolean[size];
for (int i = 0; i < size; i++)
{
if (i > 5)
bolArr1[i] = true;
else
bolArr1[i] = false;
}
BitArray bitArr1 = new BitArray(bolArr1);
IEnumerator ienm1 = bitArr1.GetEnumerator();
int iCount = 0;
while (ienm1.MoveNext())
{
Assert.Equal((Boolean)ienm1.Current, bolArr1[iCount++]); //"Err_26! wrong value returned"
}
ienm1.Reset();
iCount = 0;
while (ienm1.MoveNext())
{
Assert.Equal((Boolean)ienm1.Current, bolArr1[iCount++]); //"Err_27! wrong value returned"
}
}
/// <summary> Zjistí, jestli stejnì dlouhé BitArrays mají nastavené stejné bity. </summary>
/// <param name="bits1"> 1. BitArray. </param>
/// <param name="bits2"> 2. BitArray. </param>
/// <returns> true, když mají nastavené stejné bity. </returns>
public static bool BitArraysEqual ( BitArray bits1, BitArray bits2 )
{
if ( bits1.Count != bits2.Count )
throw new Exception( string.Format( "OtherCore.BitArraysEqual: different BitArray sizes {0} != {1}", bits1.Count != bits2.Count ) );
return EnumerablesAreSame( bits1.GetEnumerator(), bits2.GetEnumerator() );
//
// int[] array1 = new int[ ( bits1.Count + 31 ) / 32 ];
// bits1.CopyTo( array1, 0 );
// int[] array2 = new int[ array1.Length ];
// bits2.CopyTo( array2, 0 );
//
// for ( int index = array1.Length ; --index >= 0 ; )
// if ( array1[ index ] != array2[ index ] )
// return false;
//
// return true;
}
