Creating a code editor - Splitting a file

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Hello everyone, I have a small question.

I'm making a code editor (not for a big programming language) and I need some help on splitting the opened file.
The said file has such structure:

#Comments may occur in the code
["values", other values, [more values]" more values],

This was just one tuple of a file that may contain a thousand.

It would look like this:

["values", other values, [more values], more values],
["values", other values, [more values]" more values],
["values", other values, [more values], more values],

But there might be new lines throughout the code, such as:

["values", 
other values, [more 
values], more values],

The whole point is to print every value in a text box and include writing options, but for now my only problem is splitting the tuples correctly.

Could anyone give me hints on how to split such a thing properly? I'll be very, very grateful.

Posted 11-Jun-10 9:22am

User970

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volksgrenadier128 11-Jun-10 15:40pm

You can try by adding an "end tuple" character something like this:

["values", other values, [more values], more values];

Then parse it and add the text to your control.

3 solutions

Solution 3

I did it! I had to use this:

//Debug
            filearray = Regex.Split(file, @"\[""");
            foreach (string item in filearray)
            {
                MessageBox.Show(item);
            }

but it captures the [". This works for now. Thank you all!

Posted 11-Jun-10 23:35pm

User970

Updated 11-Jun-10 23:36pm

v2

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DaveAuld · Accepted Answer · 2010-06-11T10:05:00

Solution 1

Looking at the examples you have provided, it looks like the tuples can be split on;

],[

In which case i would give that a bash.

Posted 11-Jun-10 10:05am

DaveAuld

Comments

LookSharp 11-Jun-10 19:24pm

It would be nice if it were that simple, but his tuples' contents can also be wrapped in [] so a ],[ sequence can appear within a tuple as well as between them.

The examples all show the first (and only the first) member of each tuple being a quoted string, so perhaps ],[" is the separator to match on. Unfortunately, since the quoted string is 'values' I suspect that any value can be quoted.

User970 12-Jun-10 5:25am

Only the first one can be quoted. The ],[" separator is interesting, I'd really like to try it out, but whenever I try to use Regex.Split(file, "],["); I get an error (argumentExpetion - Unterminated [] set). Plus, I don't know how to put quotes as a separator... Any help on this?
(I know, stupid question, but I'm new to C#)

EDIT: After some googling, I managed to find it out. Look at my answer.

User970 16-Aug-10 10:55am

Reason for my vote of 5
It helped me answer myself

LookSharp · Accepted Answer · 2010-06-11T13:37:00

Given the assumptions that (1) any value can be optionally quoted (so the presence of quotes cannot be used as a marker) (2) brackets ([]) can be nested to an arbitrary depth, then you need to implement a parser of some kind that is able to detect commas that are not within brackets. For example:

// Returns a List<> of the positions of the record separators (commas that are not enclosed by brackets)
public List<int> ParseNestedBrackets(string inputText)
    {
    List<int> separators = new List<int>();

    int depth = 0;
    int length = inputText.Length;      // Cache the length to save a method call for each interation of the loop
    for (int pos = 0; pos < length; ++pos)
        {
        switch (inputText[pos])
            {
        case '[':
                depth += 1;
                break;
        case ',':
                if (depth == 0)
                    separators.Add(pos);
                break;
        case ']':
                depth -= 1;
                break;
        default:
            break;
            }
        }

        return separators;
    }