Index get_index(string p, int pos, int i, Tagger tagger)
{
if (p[i] != '[')
{
return(new Index(null, i));
}
i++;
var isInRow = true;
var col = 0;
var row = 0;
var neg = 1;
if (p[i] == '-')
{
neg = -1;
i++;
}
for (; i < p.Length; i++)
{
var c = p[i];
if (isInRow)
{
if (c >= '0' && c <= '9')
{
row = 10 * row + (c - '0');
}
else if (c == ',')
{
isInRow = false;
}
else
{
return(new Index(null, i));
}
}
else
{
if (c >= '0' && c <= '9')
{
col = 10 * col + (c - '0');
}
else if (c == ']')
{
break;
}
else
{
return(new Index(null, i));
}
}
}
row *= neg;
if (col < 0 || col >= xsize_)
{
return(new Index(null, i));
}
var idx = pos + row;
if (idx < 0)
{
return(new Index("_B-" + (-idx).ToString(), i));;
}
if (idx >= tagger.word_num)
{
return(new Index("_B+" + (idx - tagger.word_num + 1).ToString(), i));
}
return(new Index(tagger.x_[idx][col], i));
}
public StringBuilder apply_rule(string p, int pos, StringBuilder resultContainer, Tagger tagger)
{
resultContainer.Clear();
for (var i = 0; i < p.Length; i++)
{
if (p[i] == '%')
{
i++;
if (p[i] == 'x')
{
i++;
var res = get_index(p, pos, i, tagger);
i = res.idx;
if (res.value == null)
{
return(null);
}
resultContainer.Append(res.value);
}
else
{
return(null);
}
}
else
{
resultContainer.Append(p[i]);
}
}
return(resultContainer);
}