public bool Read()
{
bool result;
if (result = _reader.MoveToNextLine())
{
CodePoint = HexCodePoint.ParsePrefixed(_reader.ReadField());
PropertyName = _reader.ReadField();
PropertyValue = _reader.ReadField();
}
else
{
CodePoint = 0;
PropertyName = null;
PropertyValue = null;
}
return(result);
}
private static async Task ProcessNameAliasesFile(IDataSource ucdSource, UnicodeInfoBuilder builder)
{
using (var reader = new UnicodeDataFileReader(await ucdSource.OpenDataFileAsync(NameAliasesFileName).ConfigureAwait(false), ';'))
{
while (reader.MoveToNextLine())
{
var ucd = builder.GetUcd(int.Parse(reader.ReadField(), NumberStyles.HexNumber));
string name = reader.ReadField();
string kindName = reader.ReadField();
if (!EnumHelper <UnicodeNameAliasKind> .TryGetNamedValue(kindName, out var kind))
{
throw new InvalidDataException("Unrecognized name alias: " + kindName + ".3");
}
ucd.NameAliases.Add(new UnicodeNameAlias(name, kind));
}
}
}
private static async Task ProcessCjkRadicalsFile(IDataSource ucdSource, UnicodeInfoBuilder builder)
{
using (var reader = new UnicodeDataFileReader(await ucdSource.OpenDataFileAsync(CjkRadicalsFileName).ConfigureAwait(false), ';'))
{
int lastReadRadical = 0;
while (reader.MoveToNextLine())
{
string radicalIndexText = reader.ReadField();
bool isSimplified = radicalIndexText[radicalIndexText.Length - 1] == '\'';
int radicalIndex = int.Parse(isSimplified ? radicalIndexText.Substring(0, radicalIndexText.Length - 1) : radicalIndexText);
if (isSimplified ? radicalIndex != lastReadRadical : lastReadRadical + 1 != (lastReadRadical = radicalIndex))
{
throw new InvalidDataException("Did not expect radical number " + radicalIndexText + ".");
}
char radicalCodePoint = checked ((char)int.Parse(reader.ReadTrimmedField(), NumberStyles.HexNumber));
char characterCodePoint = checked ((char)int.Parse(reader.ReadTrimmedField(), NumberStyles.HexNumber));
if (!isSimplified && (radicalCodePoint & 0x8000) != 0)
{
throw new InvalidOperationException("Did not expect the radical code point to be higher than U+8000 for radical " + radicalIndex.ToString() + ".");
}
if (isSimplified)
{
builder.SetRadicalInfo(radicalIndex, UpdateRadicalData(builder.GetRadicalInfo(radicalIndex), radicalCodePoint, characterCodePoint));
}
else
{
builder.SetRadicalInfo(radicalIndex, new CjkRadicalData(radicalCodePoint, characterCodePoint));
}
}
if (lastReadRadical != UnicodeInfoBuilder.CjkRadicalCount)
{
throw new InvalidOperationException("There was not enough data for the 214 CJK radicals.");
}
}
}
private static async Task ProcessUnicodeDataFile(IDataSource ucdSource, UnicodeInfoBuilder builder)
{
using (var reader = new UnicodeDataFileReader(await ucdSource.OpenDataFileAsync(UnicodeDataFileName).ConfigureAwait(false), ';'))
{
int rangeStartCodePoint = -1;
while (reader.MoveToNextLine())
{
var codePoint = new UnicodeCodePointRange(int.Parse(reader.ReadField(), NumberStyles.HexNumber));
string name = reader.ReadField();
if (!string.IsNullOrEmpty(name) && name[0] == '<' && name[name.Length - 1] == '>')
{
if (name.EndsWith(", First>", StringComparison.OrdinalIgnoreCase))
{
if (rangeStartCodePoint >= 0)
{
throw new InvalidDataException("Invalid range data in UnicodeData.txt.");
}
rangeStartCodePoint = codePoint.FirstCodePoint;
continue;
}
else if (name.EndsWith(", Last>", StringComparison.OrdinalIgnoreCase))
{
if (rangeStartCodePoint < 0)
{
throw new InvalidDataException("Invalid range data in UnicodeData.txt.");
}
codePoint = new UnicodeCodePointRange(rangeStartCodePoint, codePoint.LastCodePoint);
name = name.Substring(1, name.Length - 8).ToUpperInvariant(); // Upper-case the name in order to respect unicode naming scheme. (Spec says all names are uppercase ASCII)
rangeStartCodePoint = -1;
}
else if (name == "<control>") // Ignore the name of the property for these code points, as it should really be empty by the spec.
{
// For control characters, we can derive a character label in of the form <control-NNNN>, which is not the character name.
name = null;
}
else
{
throw new InvalidDataException("Unexpected code point name tag: " + name + ".");
}
}
else if (rangeStartCodePoint >= 0)
{
throw new InvalidDataException("Invalid range data in UnicodeData.txt.");
}
// NB: Fields 10 and 11 are deemed obsolete. Field 11 should always be empty, and will be ignored here.
var characterData = new UnicodeCharacterDataBuilder(codePoint)
{
Name = NullIfEmpty(name),
Category = UnicodeCategoryInfo.FromShortName(reader.ReadField()).Category,
CanonicalCombiningClass = (CanonicalCombiningClass)byte.Parse(reader.ReadField()),
};
if (EnumHelper <BidirectionalClass> .TryGetNamedValue(reader.ReadField(), out var bidirectionalClass))
{
characterData.BidirectionalClass = bidirectionalClass;
}
else
{
throw new InvalidDataException(string.Format("Missing Bidi_Class property for code point(s) {0}.", codePoint));
}
characterData.CharacterDecompositionMapping = CharacterDecompositionMapping.Parse(NullIfEmpty(reader.ReadField()));
string numericDecimalField = NullIfEmpty(reader.ReadField());
string numericDigitField = NullIfEmpty(reader.ReadField());
string numericNumericField = NullIfEmpty(reader.ReadField());
characterData.BidirectionalMirrored = reader.ReadField() == "Y";
characterData.OldName = NullIfEmpty(reader.ReadField());
reader.SkipField();
characterData.SimpleUpperCaseMapping = ParseSimpleCaseMapping(reader.ReadField());
characterData.SimpleLowerCaseMapping = ParseSimpleCaseMapping(reader.ReadField());
characterData.SimpleTitleCaseMapping = ParseSimpleCaseMapping(reader.ReadField());
// Handle Numeric_Type & Numeric_Value:
// If field 6 is set, fields 7 and 8 should have the same value, and Numeric_Type is Decimal.
// If field 6 is not set but field 7 is set, field 8 should be set and have the same value. Then, the type is Digit.
// If field 6 and 7 are not set, but field 8 is set, then Numeric_Type is Numeric.
if (numericNumericField != null)
{
characterData.NumericValue = UnicodeRationalNumber.Parse(numericNumericField);
if (numericDigitField != null)
{
if (numericDigitField != numericNumericField)
{
throw new InvalidDataException("Invalid value for field 7 of code point " + characterData.CodePointRange.ToString() + ".");
}
if (numericDecimalField != null)
{
if (numericDecimalField != numericDigitField)
{
throw new InvalidDataException("Invalid value for field 6 of code point " + characterData.CodePointRange.ToString() + ".");
}
characterData.NumericType = UnicodeNumericType.Decimal;
}
else
{
characterData.NumericType = UnicodeNumericType.Digit;
}
}
else
{
characterData.NumericType = UnicodeNumericType.Numeric;
}
}
builder.Insert(characterData);
}
}
}
private static async Task ProcessBlocksFile(IDataSource ucdSource, UnicodeInfoBuilder builder)
{
using (var reader = new UnicodeDataFileReader(await ucdSource.OpenDataFileAsync(BlocksFileName).ConfigureAwait(false), ';'))
{
while (reader.MoveToNextLine())
{
builder.AddBlockEntry(new UnicodeBlock(UnicodeCodePointRange.Parse(reader.ReadField()), reader.ReadTrimmedField()));
}
}
}