kc3-lang/harfbuzz/src/OT/Var/VARC/coord-setter.hh

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• Hash : bb4d37b0
  Author :
  Date : 2025-02-26T12:17:27
  

  [VARC/coord-setter] Reduce stack allocation on 32bit systems
  

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• src/OT/Var/VARC/coord-setter.hh

• #ifndef OT_VAR_VARC_COORD_SETTER_HH
  #define OT_VAR_VARC_COORD_SETTER_HH
  
  
  #include "../../../hb.hh"
  
  
  namespace OT {
  //namespace Var {
  
  
  struct coord_setter_t
  {
    coord_setter_t (hb_array_t<const int> coords_)
    {
      length = coords_.length;
      if (length <= ARRAY_LENGTH (static_coords))
        hb_memcpy (static_coords, coords_.arrayZ, length * sizeof (int));
      else
        dynamic_coords.extend (coords_);
    }
  
    int& operator [] (unsigned idx)
    {
      if (unlikely (idx >= HB_VAR_COMPOSITE_MAX_AXES))
        return Crap(int);
  
      if (length <= ARRAY_LENGTH (static_coords))
      {
        if (idx < ARRAY_LENGTH (static_coords))
        {
          while (length <= idx)
  	  static_coords[length++] = 0;
  	return static_coords[idx];
        }
        else
          dynamic_coords.extend (hb_array (static_coords, length));
      }
  
      if (dynamic_coords.length <= idx)
      {
        if (unlikely (!dynamic_coords.resize (idx + 1)))
  	return Crap(int);
        length = idx + 1;
      }
      return dynamic_coords.arrayZ[idx];
    }
  
    hb_array_t<int> get_coords ()
    { return length <= ARRAY_LENGTH (static_coords) ? hb_array (static_coords, length) : dynamic_coords.as_array (); }
  
    private:
    hb_vector_t<int> dynamic_coords;
    unsigned length;
    int static_coords[sizeof (void *) * 8];
  };
  
  
  //} // namespace Var
  
  } // namespace OT
  
  #endif /* OT_VAR_VARC_COORD_SETTER_HH */
  

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