public static QRSegment CreateNumericSegment(string digits)
{
if (digits is null)
{
throw new ArgumentNullException(nameof(digits));
}
var numbers = digits
.Select(x => x >= '0' && x <= '9' ? x - '0' : throw new ArgumentException("String contains non-numeric characters", nameof(digits)))
.Bucket(3)
.Select(x => {
int[] currentDigits = x.ToArray();
return(new { Count = currentDigits.Length, Number = x.Aggregate(0, (a, b) => a * 10 + b) });
});
BitList bits = new BitList();
foreach (var num in numbers)
{
bits.Add(num.Number, num.Count * 3 + 1);
}
return(new QRSegment(Mode.Numeric, digits.Length, bits));
}
public static QRCode EncodeSegments(IEnumerable <QRSegment> segments, CorrectionLevel correctionLevel, int minVersion, int maxVersion, Mask mask, bool boostECL)
{
if (segments is null)
{
throw new ArgumentNullException(nameof(segments));
}
if (correctionLevel is null)
{
throw new ArgumentNullException(nameof(correctionLevel));
}
if (!(MinVersion <= minVersion && minVersion <= maxVersion && maxVersion <= MaxVersion))
{
throw new ArgumentOutOfRangeException(nameof(minVersion), nameof(maxVersion));
}
List <QRSegment> segmentList = segments.ToList();
int version;
int usedBits;
for (version = minVersion; ; ++version)
{
int capacity = ComputeCodewordsCount(version, correctionLevel) * 8;
usedBits = QRSegment.ComputeBitLength(segmentList, version);
if (usedBits != -1 && usedBits <= capacity)
{
break;
}
if (version >= maxVersion)
{
throw new ArgumentOutOfRangeException(nameof(segments), "Data length was too long");
}
}
if (boostECL)
{
while (correctionLevel.Id != CorrectionLevel.MaxValue)
{
CorrectionLevel check = correctionLevel + 1;
if (usedBits <= ComputeCodewordsCount(version, check) * 8)
{
correctionLevel = check;
}
else
{
break;
}
}
}
BitList bits = new BitList();
foreach (QRSegment segment in segmentList)
{
bits.Add(segment.Mode.ModeBits, 4);
bits.Add(segment.CharsCount, segment.Mode.GetCharsCountBitsCount(version));
bits.Add(segment.Data);
}
Debug.Assert(bits.Length == usedBits);
int dataCapacityBits = ComputeCodewordsCount(version, correctionLevel) * 8;
Debug.Assert(bits.Length <= dataCapacityBits);
bits.Add(0, Math.Min(4, dataCapacityBits - bits.Length));
bits.Add(0, (8 - bits.Length % 8) % 8);
Debug.Assert(bits.Length % 8 == 0);
for (int padByte = 0b11101100; bits.Length < dataCapacityBits; padByte ^= 0b11111101)
{
bits.Add(padByte, 8);
}
byte[] dataCodewords = new byte[bits.Length / 8];
for (int i = 0; i < bits.Length; ++i)
{
int index = i >> 3;
dataCodewords[index] = (byte)(dataCodewords[index] | (bits[i] << (7 - (i & 7))));
}
return(new QRCode(version, correctionLevel, dataCodewords, mask));
}