pdfbox/src/main/java/org/apache/pdfbox/pdmodel/font/PDTrueTypeFont.java [762:783]:
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    private TTFParser getParser(RandomAccessRead randomAccessRead, boolean isEmbedded)
            throws IOException
    {
        long startPos = randomAccessRead.getPosition();
        byte[] tagBytes = new byte[4];
        int remainingBytes = tagBytes.length;
        int amountRead;
        while ((amountRead = randomAccessRead.read(tagBytes, tagBytes.length - remainingBytes,
                remainingBytes)) > 0)
        {
            remainingBytes -= amountRead;
        }
        randomAccessRead.seek(startPos);
        if ("OTTO".equals(new String(tagBytes, StandardCharsets.US_ASCII)))
        {
            return new OTFParser(isEmbedded);
        }
        else
        {
            return new TTFParser(isEmbedded);
        }
    }
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pdfbox/src/main/java/org/apache/pdfbox/pdmodel/font/PDCIDFontType2.java [505:526]:
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    private TTFParser getParser(RandomAccessRead randomAccessRead, boolean isEmbedded)
            throws IOException
    {
        long startPos = randomAccessRead.getPosition();
        byte[] tagBytes = new byte[4];
        int remainingBytes = tagBytes.length;
        int amountRead;
        while ((amountRead = randomAccessRead.read(tagBytes, tagBytes.length - remainingBytes,
                remainingBytes)) > 0)
        {
            remainingBytes -= amountRead;
        }
        randomAccessRead.seek(startPos);
        if ("OTTO".equals(new String(tagBytes, StandardCharsets.US_ASCII)))
        {
            return new OTFParser(isEmbedded);
        }
        else
        {
            return new TTFParser(isEmbedded);
        }
    }
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