Parse CSV data in Kotlin

CsvParser.kt

class CsvParser {
    fun parseLine(line: String) : List<String> = parseLine(line, ',')

    fun parseLine(line: String, separator: Char) : List<String> {
        val result = mutableListOf<String>()
        val builder = StringBuilder()
        var quotes = 0
        for (ch in line) {
            when {
                ch == '\"' -> {
                    quotes++
                    builder.append(ch)
                }
                (ch == '\n') || (ch ==  '\r') -> {}
                (ch == separator) && (quotes % 2 == 0) -> {
                    result.add(builder.toString())
                    builder.setLength(0)
                }
                else -> builder.append(ch)
            }
        }
        if (builder.length > 0) result.add(builder.toString())

        return result
    }
}

// --- USAGE ---
//val lines = Files.readAllLines(csvFile.toPath(), StandardCharsets.UTF_8)
//  for (i in 1 until lines.size) {
//      val values = csvParser.parseLine(lines[i])
//      // do something useful with the values
//  }