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    <p>This is my attempt to implement that unpacker. Not tested as there is no example data to test it with... (not even compiled, actually)</p> <pre><code>std::vector&lt;int&gt; regions(std::vector&lt;unsigned char&gt;&amp; data6) { int rp = 0, sz = data6.size(); std::vector&lt;int&gt; result; int current_id = 0; while (rp &lt; sz) { int c = data6[rp++]; if (c &lt;= 0x3E) { // 0x00..0x3E : skip forward by this many region IDs current_id += c; } else if (c == 0x3F) { // 0x3F WORD skip forward by the amount given in the following 16-bit WORD if (rp + 2 &gt; sz) throw std::runtime_error("Invalid data"); int count = data[rp] + (data[rp + 1] &lt;&lt; 8); // (NOTE: May be H/L ?) rp += 2; current_id += count; } else if (c &lt;= 0x7F) { // 0x40..0x7F skip forward based on bits 3..5, // then include the number of IDs based on bits 0..2 int keep = (c &amp; 7); int skip = (c &gt;&gt; 3) &amp; 7; current_id += skip; for (int i=0; i&lt;keep; i++) result.push_back(current_id++); } else if (c &lt;= 0xBF) { // 0x80..0xBF include the number of IDs based on bits 3..5, // then skip the number of IDs based on bits 0..2 int skip = (c &amp; 7); int keep = (c &gt;&gt; 3) &amp; 7; for (int i=0; i&lt;keep; i++) result.push_back(current_id++); current_id += skip; } else if (c &lt;= 0xFE) { // 0xC0..0xFE subtracting 0xC0, this many region IDs are nearby int keep = c - 0xC0; for (int i=0; i&lt;keep; i++) result.push_back(current_id++); } else { // 0xFF WORD the number of region IDs given by the following WORD are nearby if (rp + 2 &gt; sz) throw std::runtime_error("Invalid data"); int count = data[rp] + (data[rp + 1] &lt;&lt; 8); // (NOTE: May be H/L ?) rp += 2; for (int i=0; i&lt;count; i++) result.push_back(current_id++); } } return result; } </code></pre> <p>I assumed that <code>WORD</code>s are encoded as low/high, but may be it's the opposite...</p>
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    1. COYou are a god among men. I will test this out tonight and even if I have to tweak around with it, you have given me a great idea of what I am to be doing. Thank you so much. You have no idea...
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