bool nbDoubleSafeChar()
{
if (nbDoubleSafeCharset(Text[P]))
{
StringValue.Append(Text[P++]);
return(true);
}
return(false);
}
private bool bBreak(string pres, Context c)
{
if (Text[P] == '\r')
{
StringValue.Append(@"\r");
P++;
if (!EndOfString() && Text[P] == '\n')
{
StringValue.Append(@"\n");
P++;
}
}
else
if (Text[P] == '\n')
{
StringValue.Append(@"\n");
P++;
}
else
{
return(false);
}
if (EndOfString() || c == Context.NoBreak)
{
return(true);
}
// fold the string with escaping line break
StringValue.AppendLine(@"\");
StringValue.Append(pres);
// if the following line starts from space char, escape it.
if (Text[P] == ' ')
{
StringValue.Append(@"\");
}
return(true);
}
private bool nsEscapedChar()
{
var c = Text[P];
string escaped;
if (CharEscaping.TryGetValue(c, out escaped))
{
StringValue.Append(escaped);
}
else
{
if (c < 0x100)
{
StringValue.Append(string.Format(@"\x{0:x2}", (int)c));
}
else
{
StringValue.Append(string.Format(@"\u{0:x4}", (int)c));
}
}
P++;
return(true);
}
/// <summary>
/// <para>Saves a part of the source text that is reduced in the <paramref name="rule"/>
/// and append it to <see cref="StringValue"/>.</para>
/// <para>If the rule does not match, nothing happens.</para>
/// </summary>
/// <param name="rule">Reduction rule to match.</param>
/// <returns>true if <paramref name="rule"/> matches; otherwise false.</returns>
protected bool Save(Func <bool> rule)
{
return
(Save(rule, s => StringValue.Append(s)));
}