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package Torello.Java;

import Torello.Java.Function.ToCharIntCharFunc;

class CharArrToCharReplFunc
{
    static String replace(
            final String            s,
            final boolean           ignoreCase,
            final char[]            matchCharsInput,
            final ToCharIntCharFunc replaceFunction
        )
    {
        char[] cArr = s.toCharArray();

        if (ignoreCase)
        {
            // Make sure the 'var-args' are not changed.  We must resort to copying
            // the input 'matchChars' array.

            char[] matchChars = new char[matchCharsInput.length];

            // Set them to lower-case, as they are copied.
            for (int i=0; i < matchChars.length; i++)
                matchChars[i] = Character.toLowerCase(matchCharsInput[i]);

            // Do the replacement on a case-insensitive basis
            for (int i=0; i < cArr.length; i++)
            {
                char c = Character.toLowerCase(cArr[i]);

                for (int j=0; j < matchChars.length; j++)

                    if (c == matchChars[j])
                    {
                        cArr[i] = replaceFunction.apply(i, cArr[i]);
                        break;
                    }
            }
        }

        else

            // Do the replacement, case-sensitive.
            for (int i=0; i < cArr.length; i++)
                for (int j=0; j < matchCharsInput.length; j++)
                    if (cArr[i] == matchCharsInput[j])
                    {
                        cArr[i] = replaceFunction.apply(i, cArr[i]);
                        break;
                    }

        return new String(cArr);
    }
}