private void record(int b) {
            data[pos] = (byte) b;
            pos++;
            if (pos >= data.length) {
                pos = 0;
            }
        }
Provides a view on the previous 5 bytes
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-cad-module/src/main/java/org/apache/tika/parser/prt/PRTParser.java