public Result <TextSpan, TextSpan> Parse(ParseText text, TextSpan span)
{
var firstLine = _lineParser.Parse(text, span);
if (!firstLine.HasResult)
{
return(new Unmatched <TextSpan, TextSpan>(span));
}
var firstValue = firstLine.Result;
if (firstValue.Length == 0)
{
return(new Unmatched <TextSpan, TextSpan>(span));
}
if (firstValue.Length < 105)
{
return(new Unmatched <TextSpan, TextSpan>(span));
}
int firstStart = firstValue.Start;
if (text[firstStart + 0] != 'I' || text[firstStart + 1] != 'S' || text[firstStart + 2] != 'A')
{
return(new Unmatched <TextSpan, TextSpan>(span));
}
Result <TextSpan, TextSpan> previousLine = firstLine;
Result <TextSpan, TextSpan> nextLine;
while ((nextLine = _lineParser.Parse(text, previousLine.Next)).HasResult)
{
int start = nextLine.Result.Start;
if (nextLine.Result.Length >= 3 && text[start] == 'I' && text[start + 1] == 'S' && text[start + 2] == 'A')
{
return(new Success <TextSpan, TextSpan>(TextSpan.FromBounds(firstStart, previousLine.Result.End), previousLine.Next));
}
previousLine = nextLine;
}
int previousEnd = previousLine.Result.End;
return(new Success <TextSpan, TextSpan>(TextSpan.FromBounds(firstStart, previousEnd), TextSpan.FromBounds(previousEnd, span.End)));
}
public Result <TextSpan, TextSpan> Parse(ParseText text, TextSpan span)
{
var firstLine = _lineParser.Parse(text, span);
if (!firstLine.HasResult)
{
return(new Unmatched <TextSpan, TextSpan>(span));
}
var firstValue = firstLine.Result;
if (firstValue.Length == 0)
{
throw new MacheteParserException("The body was empty");
}
if (firstValue.Length < 8)
{
throw new MacheteParserException("The body must contain at least 8 characters");
}
int firstStart = firstValue.Start;
if (text[firstStart + 0] != 'M' || text[firstStart + 1] != 'S' || text[firstStart + 2] != 'H')
{
throw new MacheteParserException("The body must start with an MSH segment");
}
Result <TextSpan, TextSpan> previousLine = firstLine;
Result <TextSpan, TextSpan> nextLine;
while ((nextLine = _lineParser.Parse(text, previousLine.Next)).HasResult)
{
int start = nextLine.Result.Start;
if (nextLine.Result.Length >= 3 && text[start] == 'M' && text[start + 1] == 'S' && text[start + 2] == 'H')
{
return(new Success <TextSpan, TextSpan>(TextSpan.FromBounds(firstStart, previousLine.Result.End), previousLine.Next));
}
previousLine = nextLine;
}
int previousEnd = previousLine.Result.End;
return(new Success <TextSpan, TextSpan>(TextSpan.FromBounds(firstStart, previousEnd), TextSpan.FromBounds(previousEnd, span.End)));
}