internal void EnterField(FtField aField)
{
field = aField;
// cache field values
fieldSubstitutionsEnabled = core.SubstitutionsEnabled;
fieldSubstitutionChar = core.SubstitutionChar;
fieldDelimiterChar = core.DelimiterChar;
fieldQuoteChar = core.QuoteChar;
if (headings)
{
fieldQuotedType = field.HeadingQuotedType;
}
else
{
fieldQuotedType = field.ValueQuotedType;
}
switch (fieldQuotedType)
{
case FtQuotedType.Never:
quotedState = QuotedState.NeverOpen;
break;
case FtQuotedType.Optional:
quotedState = QuotedState.CanOpen;
break;
case FtQuotedType.Always:
quotedState = QuotedState.MustOpen;
break;
default:
throw FtInternalException.Create(InternalError.DelimitedFieldParser_EnterField_UnsupportedQuotedType, fieldQuotedType.ToString());
}
textBuilder.Clear();
position = charReader.Position;
rawOffset = -1;
rawLength = 0;
}
internal DelimitedFieldParser(SerializationCore myCore, CharReader myCharReader, bool forHeadings)
{
headings = forHeadings;
charReader = myCharReader;
core = myCore;
textBuilder = new StringBuilder(20);
field = null;
fieldQuotedType = FtQuotedType.Optional;
fieldSubstitutionsEnabled = false;
fieldSubstitutionChar = '\0';
fieldDelimiterChar = '\0';
fieldQuoteChar = '\0';
quotedState = QuotedState.CanOpen;
substitutionActive = false;
position = -1;
rawOffset = -1;
rawLength = 0;
}
internal void ParseChar(char aChar, out bool finished)
{
if (substitutionActive)
{
AppendSubstitution(aChar);
substitutionActive = false;
rawLength++;
finished = false;
}
else
{
if (fieldSubstitutionsEnabled && aChar == fieldSubstitutionChar)
{
substitutionActive = true;
rawLength++;
finished = false;
}
else
{
switch (quotedState)
{
case QuotedState.NeverOpen:
if (aChar == fieldDelimiterChar)
{
finished = true;
}
else
{
finished = false;
AppendValueChar(aChar);
}
break;
case QuotedState.CanOpen:
if (aChar == fieldQuoteChar)
{
finished = false;
quotedState = QuotedState.Opened;
}
else
{
if (char.IsWhiteSpace(aChar))
{
finished = false;
rawLength++;
textBuilder.Append(aChar);
}
else
{
quotedState = QuotedState.NeverOpen;
ParseChar(aChar, out finished);
}
}
break;
case QuotedState.MustOpen:
if (char.IsWhiteSpace(aChar))
{
finished = false; // ignore white space before quote is opened
}
else
{
if (aChar == fieldDelimiterChar)
{
finished = true; // null
}
else
{
if (aChar == fieldQuoteChar)
{
finished = false;
quotedState = QuotedState.Opened;
}
else
{
FtSerializationError error = headings ? FtSerializationError.HeadingNonWhiteSpaceCharBeforeQuotesOpened : FtSerializationError.ValueNonWhiteSpaceCharBeforeQuotesOpened;
string message = headings ? Properties.Resources.DelimitedFieldParser_ParseChar_HeadingNonWhiteSpaceCharBeforeQuotesOpened : Properties.Resources.DelimitedFieldParser_ParseChar_ValueNonWhiteSpaceCharBeforeQuotesOpened;
throw new FtSerializationException(error, field, message);
}
}
}
break;
case QuotedState.Opened:
rawOffset = (int)(charReader.Position - position);
rawLength = 0;
quotedState = QuotedState.Open;
ParseChar(aChar, out finished);
break;
case QuotedState.Open:
finished = false;
if (aChar != fieldQuoteChar)
{
AppendValueChar(aChar);
}
else
{
if (charReader.Peek() == fieldQuoteChar)
{
rawLength++;
quotedState = QuotedState.Stuffed;
}
else
{
rawLength = (int)(charReader.Position - position) + rawOffset;
quotedState = QuotedState.Closed;
}
}
break;
case QuotedState.Stuffed:
AppendValueChar(fieldQuoteChar);
quotedState = QuotedState.Open;
finished = false;
break;
case QuotedState.Closed:
if (aChar == fieldDelimiterChar)
{
finished = true;
}
else
{
if (char.IsWhiteSpace(aChar))
{
finished = false;
}
else
{
FtSerializationError error = headings ? FtSerializationError.HeadingNonWhiteSpaceCharAfterQuotesClosed : FtSerializationError.ValueNonWhiteSpaceCharAfterQuotesClosed;
string message = headings ? Properties.Resources.DelimitedFieldParser_ParseChar_HeadingNonWhiteSpaceCharAfterQuotesClosed : Properties.Resources.DelimitedFieldParser_ParseChar_ValueNonWhiteSpaceCharAfterQuotesClosed;
throw new FtSerializationException(error, field, message);
}
}
break;
default:
throw FtInternalException.Create(InternalError.DelimitedFieldParser_ParseChar_UnsupportedQuotedState, quotedState.ToString());
}
}
}
}
