private void WriteSegments(BitSequence bs)
{
foreach (QRCodeEncoder segment in _segments)
{
bs.Append(segment.ModeIndicator, ModeIndicator.LENGTH);
bs.Append(segment.CharCount,
CharCountIndicator.GetLength(
_currVersion, segment.EncodingMode)
);
byte[] data = segment.GetBytes();
for (int i = 0; i < data.Length - 1; ++i)
{
bs.Append(data[i], 8);
}
int codewordBitLength = segment.BitCount % 8;
if (codewordBitLength == 0)
{
codewordBitLength = 8;
}
bs.Append(data[data.Length - 1] >> (8 - codewordBitLength),
codewordBitLength);
}
}
/// <summary>
/// 符号化モードを設定します。
/// </summary>
/// <param name="encMode">符号化モード</param>
/// <param name="c">符号化する最初の文字。この文字はシンボルに追加されません。</param>
/// <returns>シンボル容量が不足している場合は false を返します。</returns>
internal bool TrySetEncodingMode(EncodingMode encMode, char c)
{
QRCodeEncoder encoder;
Encoding encoding = _parent.Encoding;
switch (encMode)
{
case EncodingMode.NUMERIC:
encoder = new NumericEncoder(encoding);
break;
case EncodingMode.ALPHA_NUMERIC:
encoder = new AlphanumericEncoder(encoding);
break;
case EncodingMode.EIGHT_BIT_BYTE:
encoder = new ByteEncoder(encoding);
break;
case EncodingMode.KANJI:
if (Charset.IsJP(encoding.WebName))
{
encoder = new KanjiEncoder(encoding);
}
else
{
throw new InvalidOperationException();
}
break;
default:
throw new ArgumentOutOfRangeException(nameof(encMode));
}
int bitLength = encoder.GetCodewordBitLength(c);
while (_dataBitCapacity <
_dataBitCounter
+ ModeIndicator.LENGTH
+ CharCountIndicator.GetLength(_currVersion, encMode)
+ bitLength)
{
if (_currVersion >= _parent.MaxVersion)
{
return(false);
}
SelectVersion();
}
_dataBitCounter += ModeIndicator.LENGTH
+ CharCountIndicator.GetLength(_currVersion, encMode);
_currEncoder = encoder;
_segments.Add(_currEncoder);
_segmentCounter[encMode]++;
_currEncodingMode = encMode;
return(true);
}
/// <summary>
/// 型番を決定します。
/// </summary>
private void SelectVersion()
{
foreach (EncodingMode encMode in _segmentCounter.Keys)
{
int num = _segmentCounter[encMode];
_dataBitCounter +=
num * CharCountIndicator.GetLength(_currVersion + 1, encMode)
- num * CharCountIndicator.GetLength(_currVersion + 0, encMode);
}
_currVersion++;
_dataBitCapacity = 8 * DataCodeword.GetTotalNumber(
_parent.ErrorCorrectionLevel, _currVersion);
_parent.MinVersion = _currVersion;
if (_parent.StructuredAppendAllowed)
{
_dataBitCapacity -= StructuredAppend.HEADER_LENGTH;
}
}