// Detect It Easy: detection rule file format
// Author: LinXP
// doc-ref: https://www.sqlite.org/fileformat.html

init("format", "");

function detect() {
    if (Binary.compare("'SQLite format 3'00")) {
        sName = "SQLite 3 database (.SQLITE)";
        bDetected = true;
        var nTextEncoding = Binary.read_uint32(0x38, _BE)
        var nAppID = Binary.read_uint32(0x44, _BE);
        var nSQLiteVersionNumber = Binary.read_uint32(0x60, _BE);
        var nChangeCount = Binary.read_uint32(0x18, _BE);

        var nMajor = nSQLiteVersionNumber / 1000000 >> 0;
        var nMinor = (nSQLiteVersionNumber - nMajor * 1000000) / 1000 >> 0;
        var nRelease = nSQLiteVersionNumber - (nMajor * 1000000) - (nMinor * 1000) >> 0;
        sVersion = nMajor + "." + nMinor + "." + nRelease;

        switch (nTextEncoding) {
            case 1:
                sOption("UTF-8");
                break;
            case 2:
                sOption("UTF-16LE");
                break;
            case 3:
                sOption("UTF-16BE");
                break;
            default:
                bDetected = false;
        }

        if (nAppID && Binary.isVerbose()) {
            sOption("AppID:" + nAppID);
        }

        if (nChangeCount && Binary.isVerbose()) {
            sOption("Changes:" + nChangeCount);
        }
    }

    return result();
}