string ConstantString(int index)
{
LuaValue constant = Constants[index];
string s;
if (constant == null)
{
return("nil");
}
else if (constant.TryToString(out s))
{
StringBuilder escapedString = new StringBuilder();
escapedString.Append("\"");
int start = 0;
for (int c = 0; c < s.Length; ++c)
{
if (s[c] == '"' || s[c] == '\\' || Char.IsControl(s[c]))
{
escapedString.Append(s, start, c - start);
start = c + 1;
switch (s[c])
{
case '"': escapedString.Append("\\\""); break;
case '\0': escapedString.Append("\\0"); break;
case '\a': escapedString.Append("\\a"); break;
case '\b': escapedString.Append("\\b"); break;
case '\f': escapedString.Append("\\f"); break;
case '\n': escapedString.Append("\\n"); break;
case '\r': escapedString.Append("\\r"); break;
case '\t': escapedString.Append("\\t"); break;
case '\v': escapedString.Append("\\v"); break;
default:
byte[] utf8 = Encoding.UTF8.GetBytes(s[c].ToString());
foreach (byte b in utf8)
{
escapedString.AppendFormat("\\x{0:X2}", b);
}
break;
}
}
}
escapedString.Append(s, start, s.Length - start);
escapedString.Append("\"");
return(escapedString.ToString());
}
else
{
return(String.Format("#{0}", constant));
}
}
protected static bool CastToString(LuaValue v, out string value)
{
if (v == null)
{
value = String.Empty;
return(false);
}
return(v.TryToString(out value));
}
