public static QrSegment MakeAlphanumeric(string text)
{
Utils.CheckNull(text, nameof(text));
if (text.Any(c => !ALPHANUMERIC_CHARSET.Contains(c)))
{
throw new ArgumentException("String contains unencodable characters in alphanumeric mode");
}
var bb = new BitBuffer();
int i;
for (i = 0; i <= text.Length - 2; i += 2)
{
var temp = ALPHANUMERIC_CHARSET.IndexOf(text[i]) * 45;
temp += ALPHANUMERIC_CHARSET.IndexOf(text[i + 1]);
bb.AppendBits(temp, 11);
}
if (i < text.Length)
{
bb.AppendBits(ALPHANUMERIC_CHARSET.IndexOf(text[i]), 6);
}
return(new QrSegment(Mode.ALPHANUMERIC, text.Length, bb));
}
public static QrSegment MakeEci(int assignVal)
{
var bb = new BitBuffer();
if (assignVal < 0)
{
throw new ArgumentException("ECI assignment value out of range");
}
else if (assignVal < (1 << 7))
{
bb.AppendBits(assignVal, 8);
}
else if (assignVal < (1 << 14))
{
bb.AppendBits(2, 2);
bb.AppendBits(assignVal, 14);
}
else if (assignVal < 1_000_000)
{
bb.AppendBits(6, 3);
bb.AppendBits(assignVal, 21);
}
else
{
throw new ArgumentException("ECI assignment value out of range");
}
return(new QrSegment(Mode.ECI, 0, bb));
}
public static QrSegment MakeBytes(byte[] data)
{
Utils.CheckNull(data, nameof(data));
var bb = new BitBuffer();
foreach (var b in data)
{
bb.AppendBits(b & 0xFF, 8);
}
return(new QrSegment(Mode.BYTE, data.Length, bb));
}
public static QrSegment MakeKanji(string text)
{
Utils.CheckNull(text, nameof(text));
var bb = new BitBuffer();
foreach (var c in text)
{
var val = UNICODE_TO_QR_KANJI[c];
if (val == -1)
{
throw new ArgumentException("String contains non-kanji-mode characters");
}
bb.AppendBits(val, 13);
}
return(new QrSegment(Mode.KANJI, text.Length, bb));
}
public static QrSegment MakeNumeric(string digits)
{
Utils.CheckNull(digits, nameof(digits));
if (digits.Any(c => !char.IsDigit(c)))
{
throw new ArgumentException("String contains non-numeric characters");
}
var bb = new BitBuffer();
for (int i = 0; i < digits.Length;)
{
var n = Math.Min(digits.Length - i, 3);
bb.AppendBits(int.Parse(digits.AsSpan().Slice(i, n)), n * 3 + 1);
i += n;
}
return(new QrSegment(Mode.NUMERIC, digits.Length, bb));
}
public static QrCode EncodeSegments(List <QrSegment> segs, Ecc ecl, int minVersion, int maxVersion, int mask, bool boostEcl)
{
Utils.CheckNull(segs, nameof(segs));
if (!(MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= MAX_VERSION) || mask < -1 || mask > 7)
{
throw new ArgumentException("Invalid value");
}
int version, dataUsedBits;
for (version = minVersion; ; version++)
{
var capacityBits = GetNumDataCodewords(version, ecl) * 8;
dataUsedBits = QrSegment.GetTotalBits(segs, version);
if (dataUsedBits != -1 && dataUsedBits <= capacityBits)
{
break;
}
if (version >= maxVersion)
{
var msg = "Segment too long";
if (dataUsedBits != -1)
{
msg = string.Format("Data length = {0} bits, Max capacity = {1} bits", dataUsedBits, capacityBits);
}
throw new DataTooLongException(msg);
}
}
foreach (var newEcl in new Ecc[] { Ecc.Low, Ecc.Medium, Ecc.Quartitle, Ecc.High })
{
if (boostEcl && dataUsedBits <= GetNumDataCodewords(version, newEcl) * 8)
{
ecl = newEcl;
}
}
var bb = new BitBuffer();
foreach (var seg in segs)
{
bb.AppendBits(seg.Mode.ModeBits, 4);
bb.AppendBits(seg.NumChars, seg.Mode.NumCharCountBits(version));
bb.AppendData(seg.Data);
}
var dataCapacityBits = GetNumDataCodewords(version, ecl) * 8;
bb.AppendBits(0, Math.Min(4, dataCapacityBits - bb.Length));
bb.AppendBits(0, (8 - bb.Length % 8) % 8);
for (var padByte = 0xEC; bb.Length < dataCapacityBits; padByte ^= 0xEC ^ 0x11)
{
bb.AppendBits(padByte, 8);
}
var dataCodewords = new byte[bb.Length / 8];
for (var i = 0; i < bb.Length; i++)
{
dataCodewords[i >> 3] = (byte)(dataCodewords[i >> 3] | bb.GetBit(i) << (7 - (i & 7)));
}
// Create the QR Code object
return(new QrCode(version, ecl, dataCodewords, mask));
}
