Detect-It-Easy/db/Binary/text.plaintext.3.sg

// Detect It Easy: detection rule file

init("format", "Plain text");

function detect() {
    if (Binary.isPlainText()) {
        var sText = Binary.getString(0, Math.min(Binary.getSize(), 3));
        // UTF-8 BOM.
        if (/^\xef\xbb\xbf/.test(sText)) {
            sName = "UTF-8 text";
        }

        var size = Binary.getSize() < 4096 ? Binary.getSize() : 4096,
            pos = Binary.findByte(0, size, 10);

        if (pos !== -1) {
            sOptions = (pos != 0 && Binary.readByte(pos - 1) == 13) || (pos + 1 < Binary.getSize() && Binary.readByte(pos + 1) == 13) ? "CRLF" : "LF";
        } else if (Binary.findByte(0, size, 13) != -1) {
            sOptions = "CR";
        }

        bDetected = true;
    }

    return result();
}