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$first=$last=$idx=0; while (<>) { local($ucs,$rest) = split; local($u)=hex($ucs); if ($u - $last > 6) { if ($last != 0) { printf (" { start: 0x%04x, end: 0x%04x, idx: %5d },\n", $first, $last, $idx); $idx -= $u - $last - 1; } $first=$u; } $last=$u; } printf (" { start: 0x%04x, end: 0x%04x, idx: %5d },\n", $first, $last, $idx);