public bool Decode(Barcode barcode)
{
var text = barcode.Scanned;
var gs1Barcode = new Gs1128Barcode(barcode);
// Max lenght for application identifier is four
var applicationIdentifier = new StringBuilder(4);
var data = new StringBuilder();
for (var i = 0; i < text.Length; ++i)
{
var character = text[i];
if (character == '(')
{
// Process application identifier
do
{
character = text[++i];
if (character == ')')
{
break;
}
applicationIdentifier.Append(character);
} while (true);
}
// Act upon application identifier and extract that it identifies
var ai = applicationIdentifier.ToString();
var processor = Processors[ai];
processor(data, gs1Barcode, ref i);
applicationIdentifier.Clear();
}
return true;
}
public void Decode(string text)
{
var decoder = new Gs1128BarcodeTextDecoder();
var barcode = new Barcode(text, "gs1-128");
var decoded = decoder.Decode(barcode);
Assert.True(decoded);
}
public bool Decode(Barcode barcode)
{
var text = barcode.Scanned;
if (!(text.Length != 8 || text.Length != 13))
{
return false;
}
var checkDigit = CalculateCheckDigit(text);
var lastDigit = text[text.Length - 1] - 0x30;
if (checkDigit < 0 || checkDigit != lastDigit)
{
return false;
}
if (text.Length != 13 && !Gtin13Prefixes.Any(prefix => text.StartsWith(prefix)))
{
// No data to decode in form of weight or price
return true;
}
var gtin13Barcode = new Gtin13Barcode();
// Extract data to be decoded and determine type
var dataText = text.Substring(DataStartIndex, 4);
var data = float.Parse(dataText);
if (text.StartsWith("20"))
{
data /= 100;
gtin13Barcode.DataType = Gtin13BarcodeDataType.Price;
}
if (text.StartsWith("21"))
{
data /= 10;
gtin13Barcode.DataType = Gtin13BarcodeDataType.Price;
}
if (text.StartsWith("22"))
{
gtin13Barcode.DataType = Gtin13BarcodeDataType.Price;
}
if (text.StartsWith("23"))
{
gtin13Barcode.DataType = Gtin13BarcodeDataType.Weight;
data /= 1000;
}
if (text.StartsWith("24"))
{
gtin13Barcode.DataType = Gtin13BarcodeDataType.Weight;
data /= 100;
}
if (text.StartsWith("25"))
{
gtin13Barcode.DataType = Gtin13BarcodeDataType.Weight;
data /= 10;
}
gtin13Barcode.Data = data;
var decoded = text.Substring(0, DataStartIndex) + "0000";
gtin13Barcode.Decoded = decoded + CalculateCheckDigit(decoded, true);
barcode.Context = gtin13Barcode;
return true;
}
public Gs1128Barcode(Barcode barcode)
{
Scanned = barcode.Scanned;
Type = barcode.Type;
barcode.Context = this;
}
