Sequences of unspecified length

[wezm]

OpenType contains sequences with an unspecified length in a number of places. We need a way to handle these.

• Simple glyph flags (glyf)
  • The number of flags bytes to read is not specified. Instead bytes need to be read until there's a flag byte for each point. The flags themselves can control what is read after the current byte and may contain a bit indicating that one byte read applies to many points.
• Glyph names in post
  • There is an array of Pascal strings and an array that maps glyphs to an index in string array. Reading the string array requires known the maximum index in the mapping array, then read that many (+1) Pascal strings from the string data.