TheXamlGuy
81 lines
2.8 KiB
C#
81 lines
2.8 KiB
C#
using System;
|
|
|
|
namespace Gma.QrCodeNet.Encoding.DataEncodation;
|
|
|
|
/// <summary>
|
|
/// EightBitByte is a bit complicate compare to other encoding.
|
|
/// It can accept several different encoding table from global ECI table.
|
|
/// For different country, default encoding is different. JP use shift_jis, International spec use iso-8859-1
|
|
/// China use ASCII which is first part of normal char table. Between 00 to 7E
|
|
/// Korean and Thai should have their own default encoding as well. But so far I cannot find their specification freely online.
|
|
/// QrCode.Net will use international standard which is iso-8859-1 as default encoding.
|
|
/// And use UTF8 as suboption for any string that not belong to any char table or other encoder.
|
|
/// </summary>
|
|
/// <remarks>ISO/IEC 18004:2000 Chapter 8.4.4 Page 22</remarks>
|
|
internal class EightBitByteEncoder : EncoderBase
|
|
{
|
|
private const string DefaultEncoding = QRCodeConstantVariable.DefaultEncoding;
|
|
|
|
/// <summary>
|
|
/// Bitcount, Chapter 8.4.4, P.24
|
|
/// </summary>
|
|
private const int EightBitByteBitcount = 8;
|
|
|
|
/// <summary>
|
|
/// EightBitByte encoder's encoding will change according to different region
|
|
/// </summary>
|
|
/// <param name="encoding">Default encoding is "iso-8859-1"</param>
|
|
internal EightBitByteEncoder(string encoding) : base()
|
|
{
|
|
Encoding = encoding ?? DefaultEncoding;
|
|
}
|
|
|
|
internal EightBitByteEncoder() : base()
|
|
{
|
|
Encoding = DefaultEncoding;
|
|
}
|
|
|
|
internal string Encoding { get; private set; }
|
|
|
|
protected byte[] EncodeContent(string content, string encoding) => System.Text.Encoding.GetEncoding(encoding).GetBytes(content);
|
|
|
|
internal override BitList GetDataBits(string content)
|
|
{
|
|
var eciSet = new ECISet(ECISet.AppendOption.NameToValue);
|
|
if (!eciSet.ContainsECIName(Encoding))
|
|
{
|
|
throw new ArgumentOutOfRangeException(
|
|
nameof(Encoding),
|
|
$"Current ECI table does not support this encoding. Please check {nameof(ECISet)} class for more info.");
|
|
}
|
|
|
|
byte[] contentBytes = EncodeContent(content, Encoding);
|
|
|
|
return GetDataBitsByByteArray(contentBytes, Encoding);
|
|
}
|
|
|
|
internal BitList GetDataBitsByByteArray(byte[] encodeContent, string encodingName)
|
|
{
|
|
var dataBits = new BitList();
|
|
|
|
// Current plan for UTF8 support is put Byte order Mark in front of content byte.
|
|
// Also include ECI header before encoding header. Which will be add with encoding header.
|
|
if (encodingName == "utf-8")
|
|
{
|
|
byte[] utf8BOM = QRCodeConstantVariable.UTF8ByteOrderMark;
|
|
for (int index = 0; index < utf8BOM.Length; index++)
|
|
{
|
|
dataBits.Add(utf8BOM[index], EightBitByteBitcount);
|
|
}
|
|
}
|
|
|
|
for (int index = 0; index < encodeContent.Length; index++)
|
|
{
|
|
dataBits.Add(encodeContent[index], EightBitByteBitcount);
|
|
}
|
|
return dataBits;
|
|
}
|
|
|
|
protected override int GetBitCountInCharCountIndicator(int version) => CharCountIndicatorTable.GetBitCountInCharCountIndicator(version);
|
|
}
|