public override (BitList, VersionInfo) Encode(string content, ErrorCorrectionLevel errorCorrectionLevel)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
byte[] data = TextEncoding.UTF8.GetBytes(content);
EncodingMode encodingMode = EncodingMode.Byte;
var versionInfo = VersionInfo.FindSmallestVersionInfo(errorCorrectionLevel, encodingMode, data.Length * 8);
if (versionInfo == null)
{
throw new InvalidOperationException("Too much data to encode");
}
var bits = new BitList();
bits.AddBits((uint)encodingMode, 4);
bits.AddBits((uint)content.Length, versionInfo.CharCountBits(encodingMode));
foreach (var b in data)
{
bits.AddByte(b);
}
AddPaddingAndTerminator(ref bits, versionInfo);
return(bits, versionInfo);
}
public void FindSmallestVersionInfo_NumberOfDataBitsOutOfRange_ShouldReturnNull()
{
// Act
var versionInfo = VersionInfo.FindSmallestVersionInfo(ErrorCorrectionLevel.H, EncodingMode.AlphaNumeric, 10208);
// Assert
versionInfo.Should().BeNull();
}
public void FindSmallestVersionInfo_ShouldReturnCorrectVersionForGivenNumberOfDataBits(int dataBits, byte expectedVersion)
{
// Act
var versionInfo = VersionInfo.FindSmallestVersionInfo(ErrorCorrectionLevel.H, EncodingMode.AlphaNumeric, dataBits);
// Assert
versionInfo.Should().NotBeNull();
versionInfo.Version.Should().Be(expectedVersion);
}
public override (BitList, VersionInfo) Encode(string content, ErrorCorrectionLevel errorCorrectionLevel)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
bool contentLengthIsOdd = content.Length % 2 == 1;
int contentBitCount = (content.Length / 2) * 11;
if (contentLengthIsOdd)
{
contentBitCount += 6;
}
EncodingMode encodingMode = EncodingMode.AlphaNumeric;
var versionInfo = VersionInfo.FindSmallestVersionInfo(errorCorrectionLevel, encodingMode, contentBitCount);
if (versionInfo == null)
{
throw new InvalidOperationException("Too much data to encode");
}
var bits = new BitList();
bits.AddBits((uint)encodingMode, 4);
bits.AddBits((uint)content.Length, versionInfo.CharCountBits(encodingMode));
var encoder = new Queue <int>(content.Select(x => CharSet.IndexOf(x)));
for (int i = 0; i < content.Length / 2; i++)
{
int c1 = encoder.Dequeue();
int c2 = encoder.Dequeue();
if (c1 < 0 || c2 < 0)
{
throw new InvalidOperationException($"{content} can not be ancoded as {encodingMode}");
}
bits.AddBits((uint)(c1 * 45 + c2), 11);
}
if (contentLengthIsOdd)
{
int c = encoder.Dequeue();
if (c < 0)
{
throw new InvalidOperationException($"{content} can not be ancoded as {encodingMode}");
}
bits.AddBits((uint)c, 6);
}
AddPaddingAndTerminator(ref bits, versionInfo);
return(bits, versionInfo);
}
public override (BitList, VersionInfo) Encode(string content, ErrorCorrectionLevel errorCorrectionLevel)
{
if (content == null)
{
throw new ArgumentNullException(nameof(content));
}
var contentBitCount = (content.Length / 3) * 10;
switch (content.Length % 3)
{
case 1:
contentBitCount += 4;
break;
case 2:
contentBitCount += 7;
break;
}
EncodingMode encodingMode = EncodingMode.Numeric;
var versionInfo = VersionInfo.FindSmallestVersionInfo(errorCorrectionLevel, encodingMode, contentBitCount);
if (versionInfo == null)
{
throw new InvalidOperationException("Too much data to encode");
}
var bits = new BitList();
bits.AddBits((uint)encodingMode, 4);
bits.AddBits((uint)content.Length, versionInfo.CharCountBits(encodingMode));
for (int i = 0; i < content.Length; i += 3)
{
string currentContentPart = i + 3 <= content.Length ? content.Substring(i, 3) : content.Substring(i);
if (!uint.TryParse(currentContentPart, out uint currentNumericalValue))
{
throw new InvalidOperationException($"{content} can not be ancoded as {encodingMode}");
}
byte bitCount;
switch (currentContentPart.Length % 3)
{
case 0:
bitCount = 10;
break;
case 1:
bitCount = 4;
break;
case 2:
bitCount = 7;
break;
default:
throw new InvalidOperationException();
}
bits.AddBits(currentNumericalValue, bitCount);
}
AddPaddingAndTerminator(ref bits, versionInfo);
return(bits, versionInfo);
}