C# human readable formating of a special syntax [closed]

Question

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.

Closed 9 years ago.

Hi all i kinda need some help at creating a function for turning a plain syntax in human readable format:

Syntax looks like this:

[OPENTAG]
(type)name:value
[OPENTAG]
(type)name:value
(type)name:value
(type)name:value
[/CLOSETAG]
[/CLOSETAG]

Would like to turn this into this:

    [OPENTAG]
         (type)name:value
         [OPENTAG]
             (type)name:value
             (type)name:value
             (type)name:value
         [/CLOSETAG]
    [/CLOSETAG]

    private string textFormater(string input)
    {
        string[] lines = Regex.Split(input, "\r\n");
        int tabs = 0;
        string newtext = "";
        foreach (string line in lines)
        {

            Match m = Regex.Match(line, "\\[.*\\]");
            bool isTop;
            bool isTopClose = false;
            string tabtext = "";

            if (m.Success)
            {
                if (line.Contains("/"))
                {
                    tabs--;
                    isTopClose = true;
                }
                else
                {
                    tabs++;
                }
                isTop = true;
            }
            else
            {
                isTop = false;
            }

            if (isTop && !isTopClose && tabs == 1)
            {
                newtext += line;
            }
            else if (isTop && !isTopClose)
            {
                for (int i = 1; i <= tabs - 1; i++)
                {
                    tabtext += "\t";
                }
                newtext += "\r\n" + tabtext + line;
            }
            else
            {
                for (int i = 1; i <= tabs; i++)
                {
                    tabtext += "\t";
                }
                newtext += "\r\n" + tabtext + line;
            }

        }
        return newtext;
    }

I have atm a solution but the code is so messy and slow, in a 2mb file it takes ages :) Thanks for your help!

Cheers

Answer 1

Try to use a StringBuilder for your output text instead of just a string, that should speed things up.

EDIT:

Does this do what you want?

private static string textFormater2(string input)
    {
        string[] lines = Regex.Split(input, "\r\n");
        int tabCount = 0;
        StringBuilder output = new StringBuilder();

        using (StringReader sr = new StringReader(input))
        {
            string l;
            while (!string.IsNullOrEmpty(l = sr.ReadLine()))
            {
                if (l.Substring(0, 1) == "[")
                    if (l.Contains('/'))
                        tabCount--;

                string tabs = string.Empty;
                for (int i = 0; i < tabCount; i++)
                    tabs += "\t";

                output.AppendLine(tabs + l);

                if (l.Substring(0, 1) == "[")
                    if (!l.Contains('/'))
                        tabCount++;
            }
        }

        return output.ToString();
    }