"""cffLib: read/write Adobe CFF fonts

OpenType fonts with PostScript outlines contain a completely independent
font file, Adobe's *Compact Font Format*. So dealing with OpenType fonts
requires also dealing with CFF. This module allows you to read and write
fonts written in the CFF format.

In 2016, OpenType 1.8 introduced the `CFF2 <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2>`_
format which, along with other changes, extended the CFF format to deal with
the demands of variable fonts. This module parses both original CFF and CFF2.

"""

from fontTools.misc import sstruct
from fontTools.misc import psCharStrings
from fontTools.misc.arrayTools import unionRect, intRect
from fontTools.misc.textTools import bytechr, byteord, bytesjoin, tobytes, tostr, safeEval
from fontTools.ttLib import TTFont
from fontTools.ttLib.tables.otBase import OTTableWriter
from fontTools.ttLib.tables.otBase import OTTableReader
from fontTools.ttLib.tables import otTables as ot
from io import BytesIO
import struct
import logging
import re

# mute cffLib debug messages when running ttx in verbose mode
DEBUG = logging.DEBUG - 1
log = logging.getLogger(__name__)

cffHeaderFormat = """
	major:   B
	minor:   B
	hdrSize: B
"""

maxStackLimit = 513
# maxstack operator has been deprecated. max stack is now always 513.


class CFFFontSet(object):
	"""A CFF font "file" can contain more than one font, although this is
	extremely rare (and not allowed within OpenType fonts).

	This class is the entry point for parsing a CFF table. To actually
	manipulate the data inside the CFF font, you will want to access the
	``CFFFontSet``'s :class:`TopDict` object. To do this, a ``CFFFontSet``
	object can either be treated as a dictionary (with appropriate
	``keys()`` and ``values()`` methods) mapping font names to :class:`TopDict`
	objects, or as a list.

	.. code:: python

		from fontTools import ttLib
		tt = ttLib.TTFont("Tests/cffLib/data/LinLibertine_RBI.otf")
		tt["CFF "].cff
		# <fontTools.cffLib.CFFFontSet object at 0x101e24c90>
		tt["CFF "].cff[0] # Here's your actual font data
		# <fontTools.cffLib.TopDict object at 0x1020f1fd0>
	
	"""

	def decompile(self, file, otFont, isCFF2=None):
		"""Parse a binary CFF file into an internal representation. ``file``
		should be a file handle object. ``otFont`` is the top-level
		:py:class:`fontTools.ttLib.ttFont.TTFont` object containing this CFF file.

		If ``isCFF2`` is passed and set to ``True`` or ``False``, then the
		library makes an assertion that the CFF header is of the appropriate
		version.
		"""

		self.otFont = otFont
		sstruct.unpack(cffHeaderFormat, file.read(3), self)
		if isCFF2 is not None:
			# called from ttLib: assert 'major' as read from file matches the
			# expected version
			expected_major = (2 if isCFF2 else 1)
			if self.major != expected_major:
				raise ValueError(
					"Invalid CFF 'major' version: expected %d, found %d" %
					(expected_major, self.major))
		else:
			# use 'major' version from file to determine if isCFF2
			assert self.major in (1, 2), "Unknown CFF format"
			isCFF2 = self.major == 2
		if not isCFF2:
			self.offSize = struct.unpack("B", file.read(1))[0]
			file.seek(self.hdrSize)
			self.fontNames = list(tostr(s) for s in Index(file, isCFF2=isCFF2))
			self.topDictIndex = TopDictIndex(file, isCFF2=isCFF2)
			self.strings = IndexedStrings(file)
		else:  # isCFF2
			self.topDictSize = struct.unpack(">H", file.read(2))[0]
			file.seek(self.hdrSize)
			self.fontNames = ["CFF2Font"]
			cff2GetGlyphOrder = otFont.getGlyphOrder
			# in CFF2, offsetSize is the size of the TopDict data.
			self.topDictIndex = TopDictIndex(
				file, cff2GetGlyphOrder, self.topDictSize, isCFF2=isCFF2)
			self.strings = None
		self.GlobalSubrs = GlobalSubrsIndex(file, isCFF2=isCFF2)
		self.topDictIndex.strings = self.strings
		self.topDictIndex.GlobalSubrs = self.GlobalSubrs

	def __len__(self):
		return len(self.fontNames)

	def keys(self):
		return list(self.fontNames)

	def values(self):
		return self.topDictIndex

	def __getitem__(self, nameOrIndex):
		""" Return TopDict instance identified by name (str) or index (int
		or any object that implements `__index__`).
		"""
		if hasattr(nameOrIndex, "__index__"):
			index = nameOrIndex.__index__()
		elif isinstance(nameOrIndex, str):
			name = nameOrIndex
			try:
				index = self.fontNames.index(name)
			except ValueError:
				raise KeyError(nameOrIndex)
		else:
			raise TypeError(nameOrIndex)
		return self.topDictIndex[index]

	def compile(self, file, otFont, isCFF2=None):
		"""Write the object back into binary representation onto the given file.
		``file`` should be a file handle object. ``otFont`` is the top-level
		:py:class:`fontTools.ttLib.ttFont.TTFont` object containing this CFF file.

		If ``isCFF2`` is passed and set to ``True`` or ``False``, then the
		library makes an assertion that the CFF header is of the appropriate
		version.
		"""
		self.otFont = otFont
		if isCFF2 is not None:
			# called from ttLib: assert 'major' value matches expected version
			expected_major = (2 if isCFF2 else 1)
			if self.major != expected_major:
				raise ValueError(
					"Invalid CFF 'major' version: expected %d, found %d" %
					(expected_major, self.major))
		else:
			# use current 'major' value to determine output format
			assert self.major in (1, 2), "Unknown CFF format"
			isCFF2 = self.major == 2

		if otFont.recalcBBoxes and not isCFF2:
			for topDict in self.topDictIndex:
				topDict.recalcFontBBox()

		if not isCFF2:
			strings = IndexedStrings()
		else:
			strings = None
		writer = CFFWriter(isCFF2)
		topCompiler = self.topDictIndex.getCompiler(strings, self, isCFF2=isCFF2)
		if isCFF2:
			self.hdrSize = 5
			writer.add(sstruct.pack(cffHeaderFormat, self))
			# Note: topDictSize will most likely change in CFFWriter.toFile().
			self.topDictSize = topCompiler.getDataLength()
			writer.add(struct.pack(">H", self.topDictSize))
		else:
			self.hdrSize = 4
			self.offSize = 4  # will most likely change in CFFWriter.toFile().
			writer.add(sstruct.pack(cffHeaderFormat, self))
			writer.add(struct.pack("B", self.offSize))
		if not isCFF2:
			fontNames = Index()
			for name in self.fontNames:
				fontNames.append(name)
			writer.add(fontNames.getCompiler(strings, self, isCFF2=isCFF2))
		writer.add(topCompiler)
		if not isCFF2:
			writer.add(strings.getCompiler())
		writer.add(self.GlobalSubrs.getCompiler(strings, self, isCFF2=isCFF2))

		for topDict in self.topDictIndex:
			if not hasattr(topDict, "charset") or topDict.charset is None:
				charset = otFont.getGlyphOrder()
				topDict.charset = charset
		children = topCompiler.getChildren(strings)
		for child in children:
			writer.add(child)

		writer.toFile(file)

	def toXML(self, xmlWriter):
		"""Write the object into XML representation onto the given
		:class:`fontTools.misc.xmlWriter.XMLWriter`.

		.. code:: python

			writer = xmlWriter.XMLWriter(sys.stdout)
			tt["CFF "].cff.toXML(writer)

		"""

		xmlWriter.simpletag("major", value=self.major)
		xmlWriter.newline()
		xmlWriter.simpletag("minor", value=self.minor)
		xmlWriter.newline()
		for fontName in self.fontNames:
			xmlWriter.begintag("CFFFont", name=tostr(fontName))
			xmlWriter.newline()
			font = self[fontName]
			font.toXML(xmlWriter)
			xmlWriter.endtag("CFFFont")
			xmlWriter.newline()
		xmlWriter.newline()
		xmlWriter.begintag("GlobalSubrs")
		xmlWriter.newline()
		self.GlobalSubrs.toXML(xmlWriter)
		xmlWriter.endtag("GlobalSubrs")
		xmlWriter.newline()

	def fromXML(self, name, attrs, content, otFont=None):
		"""Reads data from the XML element into the ``CFFFontSet`` object."""
		self.otFont = otFont

		# set defaults. These will be replaced if there are entries for them
		# in the XML file.
		if not hasattr(self, "major"):
			self.major = 1
		if not hasattr(self, "minor"):
			self.minor = 0

		if name == "CFFFont":
			if self.major == 1:
				if not hasattr(self, "offSize"):
					# this will be recalculated when the cff is compiled.
					self.offSize = 4
				if not hasattr(self, "hdrSize"):
					self.hdrSize = 4
				if not hasattr(self, "GlobalSubrs"):
					self.GlobalSubrs = GlobalSubrsIndex()
				if not hasattr(self, "fontNames"):
					self.fontNames = []
					self.topDictIndex = TopDictIndex()
				fontName = attrs["name"]
				self.fontNames.append(fontName)
				topDict = TopDict(GlobalSubrs=self.GlobalSubrs)
				topDict.charset = None  # gets filled in later
			elif self.major == 2:
				if not hasattr(self, "hdrSize"):
					self.hdrSize = 5
				if not hasattr(self, "GlobalSubrs"):
					self.GlobalSubrs = GlobalSubrsIndex()
				if not hasattr(self, "fontNames"):
					self.fontNames = ["CFF2Font"]
				cff2GetGlyphOrder = self.otFont.getGlyphOrder
				topDict = TopDict(
					GlobalSubrs=self.GlobalSubrs,
					cff2GetGlyphOrder=cff2GetGlyphOrder)
				self.topDictIndex = TopDictIndex(None, cff2GetGlyphOrder, None)
			self.topDictIndex.append(topDict)
			for element in content:
				if isinstance(element, str):
					continue
				name, attrs, content = element
				topDict.fromXML(name, attrs, content)

			if hasattr(topDict, "VarStore") and topDict.FDArray[0].vstore is None:
				fdArray = topDict.FDArray
				for fontDict in fdArray:
					if hasattr(fontDict, "Private"):
						fontDict.Private.vstore = topDict.VarStore

		elif name == "GlobalSubrs":
			subrCharStringClass = psCharStrings.T2CharString
			if not hasattr(self, "GlobalSubrs"):
				self.GlobalSubrs = GlobalSubrsIndex()
			for element in content:
				if isinstance(element, str):
					continue
				name, attrs, content = element
				subr = subrCharStringClass()
				subr.fromXML(name, attrs, content)
				self.GlobalSubrs.append(subr)
		elif name == "major":
			self.major = int(attrs['value'])
		elif name == "minor":
			self.minor = int(attrs['value'])

	def convertCFFToCFF2(self, otFont):
		"""Converts this object from CFF format to CFF2 format. This conversion
		is done 'in-place'. The conversion cannot be reversed.

		This assumes a decompiled CFF table. (i.e. that the object has been
		filled via :meth:`decompile`.)"""
		self.major = 2
		cff2GetGlyphOrder = self.otFont.getGlyphOrder
		topDictData = TopDictIndex(None, cff2GetGlyphOrder, None)
		topDictData.items = self.topDictIndex.items
		self.topDictIndex = topDictData
		topDict = topDictData[0]
		if hasattr(topDict, 'Private'):
			privateDict = topDict.Private
		else:
			privateDict = None
		opOrder = buildOrder(topDictOperators2)
		topDict.order = opOrder
		topDict.cff2GetGlyphOrder = cff2GetGlyphOrder
		for entry in topDictOperators:
			key = entry[1]
			if key not in opOrder:
				if key in topDict.rawDict:
					del topDict.rawDict[key]
				if hasattr(topDict, key):
					delattr(topDict, key)

		if not hasattr(topDict, "FDArray"):
			fdArray = topDict.FDArray = FDArrayIndex()
			fdArray.strings = None
			fdArray.GlobalSubrs = topDict.GlobalSubrs
			topDict.GlobalSubrs.fdArray = fdArray
			charStrings = topDict.CharStrings
			if charStrings.charStringsAreIndexed:
				charStrings.charStringsIndex.fdArray = fdArray
			else:
				charStrings.fdArray = fdArray
			fontDict = FontDict()
			fontDict.setCFF2(True)
			fdArray.append(fontDict)
			fontDict.Private = privateDict
			privateOpOrder = buildOrder(privateDictOperators2)
			for entry in privateDictOperators:
				key = entry[1]
				if key not in privateOpOrder:
					if key in privateDict.rawDict:
						# print "Removing private dict", key
						del privateDict.rawDict[key]
					if hasattr(privateDict, key):
						delattr(privateDict, key)
						# print "Removing privateDict attr", key
		else:
			# clean up the PrivateDicts in the fdArray
			fdArray = topDict.FDArray
			privateOpOrder = buildOrder(privateDictOperators2)
			for fontDict in fdArray:
				fontDict.setCFF2(True)
				for key in fontDict.rawDict.keys():
					if key not in fontDict.order:
						del fontDict.rawDict[key]
						if hasattr(fontDict, key):
							delattr(fontDict, key)

				privateDict = fontDict.Private
				for entry in privateDictOperators:
					key = entry[1]
					if key not in privateOpOrder:
						if key in privateDict.rawDict:
							# print "Removing private dict", key
							del privateDict.rawDict[key]
						if hasattr(privateDict, key):
							delattr(privateDict, key)
							# print "Removing privateDict attr", key
		# At this point, the Subrs and Charstrings are all still T2Charstring class
		# easiest to fix this by compiling, then decompiling again
		file = BytesIO()
		self.compile(file, otFont, isCFF2=True)
		file.seek(0)
		self.decompile(file, otFont, isCFF2=True)


class CFFWriter(object):
	"""Helper class for serializing CFF data to binary. Used by
	:meth:`CFFFontSet.compile`."""
	def __init__(self, isCFF2):
		self.data = []
		self.isCFF2 = isCFF2

	def add(self, table):
		self.data.append(table)

	def toFile(self, file):
		lastPosList = None
		count = 1
		while True:
			log.log(DEBUG, "CFFWriter.toFile() iteration: %d", count)
			count = count + 1
			pos = 0
			posList = [pos]
			for item in self.data:
				if hasattr(item, "getDataLength"):
					endPos = pos + item.getDataLength()
					if isinstance(item, TopDictIndexCompiler) and item.isCFF2:
						self.topDictSize = item.getDataLength()
				else:
					endPos = pos + len(item)
				if hasattr(item, "setPos"):
					item.setPos(pos, endPos)
				pos = endPos
				posList.append(pos)
			if posList == lastPosList:
				break
			lastPosList = posList
		log.log(DEBUG, "CFFWriter.toFile() writing to file.")
		begin = file.tell()
		if self.isCFF2:
			self.data[1] = struct.pack(">H", self.topDictSize)
		else:
			self.offSize = calcOffSize(lastPosList[-1])
			self.data[1] = struct.pack("B", self.offSize)
		posList = [0]
		for item in self.data:
			if hasattr(item, "toFile"):
				item.toFile(file)
			else:
				file.write(item)
			posList.append(file.tell() - begin)
		assert posList == lastPosList


def calcOffSize(largestOffset):
	if largestOffset < 0x100:
		offSize = 1
	elif largestOffset < 0x10000:
		offSize = 2
	elif largestOffset < 0x1000000:
		offSize = 3
	else:
		offSize = 4
	return offSize


class IndexCompiler(object):
	"""Base class for writing CFF `INDEX data <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#5-index-data>`_
	to binary."""

	def __init__(self, items, strings, parent, isCFF2=None):
		if isCFF2 is None and hasattr(parent, "isCFF2"):
			isCFF2 = parent.isCFF2
			assert isCFF2 is not None
		self.isCFF2 = isCFF2
		self.items = self.getItems(items, strings)
		self.parent = parent

	def getItems(self, items, strings):
		return items

	def getOffsets(self):
		# An empty INDEX contains only the count field.
		if self.items:
			pos = 1
			offsets = [pos]
			for item in self.items:
				if hasattr(item, "getDataLength"):
					pos = pos + item.getDataLength()
				else:
					pos = pos + len(item)
				offsets.append(pos)
		else:
			offsets = []
		return offsets

	def getDataLength(self):
		if self.isCFF2:
			countSize = 4
		else:
			countSize = 2

		if self.items:
			lastOffset = self.getOffsets()[-1]
			offSize = calcOffSize(lastOffset)
			dataLength = (
				countSize +                        # count
				1 +                                # offSize
				(len(self.items) + 1) * offSize +  # the offsets
				lastOffset - 1                     # size of object data
			)
		else:
			# count. For empty INDEX tables, this is the only entry.
			dataLength = countSize

		return dataLength

	def toFile(self, file):
		offsets = self.getOffsets()
		if self.isCFF2:
			writeCard32(file, len(self.items))
		else:
			writeCard16(file, len(self.items))
		# An empty INDEX contains only the count field.
		if self.items:
			offSize = calcOffSize(offsets[-1])
			writeCard8(file, offSize)
			offSize = -offSize
			pack = struct.pack
			for offset in offsets:
				binOffset = pack(">l", offset)[offSize:]
				assert len(binOffset) == -offSize
				file.write(binOffset)
			for item in self.items:
				if hasattr(item, "toFile"):
					item.toFile(file)
				else:
					data = tobytes(item, encoding="latin1")
					file.write(data)


class IndexedStringsCompiler(IndexCompiler):

	def getItems(self, items, strings):
		return items.strings


class TopDictIndexCompiler(IndexCompiler):
	"""Helper class for writing the TopDict to binary."""

	def getItems(self, items, strings):
		out = []
		for item in items:
			out.append(item.getCompiler(strings, self))
		return out

	def getChildren(self, strings):
		children = []
		for topDict in self.items:
			children.extend(topDict.getChildren(strings))
		return children

	def getOffsets(self):
		if self.isCFF2:
			offsets = [0, self.items[0].getDataLength()]
			return offsets
		else:
			return super(TopDictIndexCompiler, self).getOffsets()

	def getDataLength(self):
		if self.isCFF2:
			dataLength = self.items[0].getDataLength()
			return dataLength
		else:
			return super(TopDictIndexCompiler, self).getDataLength()

	def toFile(self, file):
		if self.isCFF2:
			self.items[0].toFile(file)
		else:
			super(TopDictIndexCompiler, self).toFile(file)


class FDArrayIndexCompiler(IndexCompiler):
	"""Helper class for writing the
	`Font DICT INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#10-font-dict-index-font-dicts-and-fdselect>`_
	to binary."""

	def getItems(self, items, strings):
		out = []
		for item in items:
			out.append(item.getCompiler(strings, self))
		return out

	def getChildren(self, strings):
		children = []
		for fontDict in self.items:
			children.extend(fontDict.getChildren(strings))
		return children

	def toFile(self, file):
		offsets = self.getOffsets()
		if self.isCFF2:
			writeCard32(file, len(self.items))
		else:
			writeCard16(file, len(self.items))
		offSize = calcOffSize(offsets[-1])
		writeCard8(file, offSize)
		offSize = -offSize
		pack = struct.pack
		for offset in offsets:
			binOffset = pack(">l", offset)[offSize:]
			assert len(binOffset) == -offSize
			file.write(binOffset)
		for item in self.items:
			if hasattr(item, "toFile"):
				item.toFile(file)
			else:
				file.write(item)

	def setPos(self, pos, endPos):
		self.parent.rawDict["FDArray"] = pos


class GlobalSubrsCompiler(IndexCompiler):
	"""Helper class for writing the `global subroutine INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#9-local-and-global-subr-indexes>`_
	to binary."""

	def getItems(self, items, strings):
		out = []
		for cs in items:
			cs.compile(self.isCFF2)
			out.append(cs.bytecode)
		return out


class SubrsCompiler(GlobalSubrsCompiler):
	"""Helper class for writing the `local subroutine INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#9-local-and-global-subr-indexes>`_
	to binary."""
	
	def setPos(self, pos, endPos):
		offset = pos - self.parent.pos
		self.parent.rawDict["Subrs"] = offset


class CharStringsCompiler(GlobalSubrsCompiler):
	"""Helper class for writing the `CharStrings INDEX <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#9-local-and-global-subr-indexes>`_
	to binary."""
	def getItems(self, items, strings):
		out = []
		for cs in items:
			cs.compile(self.isCFF2)
			out.append(cs.bytecode)
		return out

	def setPos(self, pos, endPos):
		self.parent.rawDict["CharStrings"] = pos


class Index(object):
	"""This class represents what the CFF spec calls an INDEX (an array of
	variable-sized objects). `Index` items can be addressed and set using
	Python list indexing."""

	compilerClass = IndexCompiler

	def __init__(self, file=None, isCFF2=None):
		assert (isCFF2 is None) == (file is None)
		self.items = []
		name = self.__class__.__name__
		if file is None:
			return
		self._isCFF2 = isCFF2
		log.log(DEBUG, "loading %s at %s", name, file.tell())
		self.file = file
		if isCFF2:
			count = readCard32(file)
		else:
			count = readCard16(file)
		if count == 0:
			return
		self.items = [None] * count
		offSize = readCard8(file)
		log.log(DEBUG, "    index count: %s offSize: %s", count, offSize)
		assert offSize <= 4, "offSize too large: %s" % offSize
		self.offsets = offsets = []
		pad = b'\0' * (4 - offSize)
		for index in range(count + 1):
			chunk = file.read(offSize)
			chunk = pad + chunk
			offset, = struct.unpack(">L", chunk)
			offsets.append(int(offset))
		self.offsetBase = file.tell() - 1
		file.seek(self.offsetBase + offsets[-1])  # pretend we've read the whole lot
		log.log(DEBUG, "    end of %s at %s", name, file.tell())

	def __len__(self):
		return len(self.items)

	def __getitem__(self, index):
		item = self.items[index]
		if item is not None:
			return item
		offset = self.offsets[index] + self.offsetBase
		size = self.offsets[index + 1] - self.offsets[index]
		file = self.file
		file.seek(offset)
		data = file.read(size)
		assert len(data) == size
		item = self.produceItem(index, data, file, offset)
		self.items[index] = item
		return item

	def __setitem__(self, index, item):
		self.items[index] = item

	def produceItem(self, index, data, file, offset):
		return data

	def append(self, item):
		"""Add an item to an INDEX."""
		self.items.append(item)

	def getCompiler(self, strings, parent, isCFF2=None):
		return self.compilerClass(self, strings, parent, isCFF2=isCFF2)

	def clear(self):
		"""Empty the INDEX."""
		del self.items[:]


class GlobalSubrsIndex(Index):
	"""This index contains all the global subroutines in the font. A global
	subroutine is a set of ``CharString`` data which is accessible to any
	glyph in the font, and are used to store repeated instructions - for
	example, components may be encoded as global subroutines, but so could
	hinting instructions.

	Remember that when interpreting a ``callgsubr`` instruction (or indeed
	a ``callsubr`` instruction) that you will need to add the "subroutine
	number bias" to number given:

	.. code:: python

		tt = ttLib.TTFont("Almendra-Bold.otf")
		u = tt["CFF "].cff[0].CharStrings["udieresis"]
		u.decompile()

		u.toXML(XMLWriter(sys.stdout))
		# <some stuff>
		# -64 callgsubr <-- Subroutine which implements the dieresis mark
		# <other stuff>

		tt["CFF "].cff[0].GlobalSubrs[-64] # <-- WRONG
		# <T2CharString (bytecode) at 103451d10>

		tt["CFF "].cff[0].GlobalSubrs[-64 + 107] # <-- RIGHT
		# <T2CharString (source) at 103451390>

	("The bias applied depends on the number of subrs (gsubrs). If the number of
	subrs (gsubrs) is less than 1240, the bias is 107. Otherwise if it is less
	than 33900, it is 1131; otherwise it is 32768.",
	`Subroutine Operators <https://docs.microsoft.com/en-us/typography/opentype/otspec180/cff2charstr#section4.4>`)
	"""

	compilerClass = GlobalSubrsCompiler
	subrClass = psCharStrings.T2CharString
	charStringClass = psCharStrings.T2CharString

	def __init__(self, file=None, globalSubrs=None, private=None,
			fdSelect=None, fdArray=None, isCFF2=None):
		super(GlobalSubrsIndex, self).__init__(file, isCFF2=isCFF2)
		self.globalSubrs = globalSubrs
		self.private = private
		if fdSelect:
			self.fdSelect = fdSelect
		if fdArray:
			self.fdArray = fdArray

	def produceItem(self, index, data, file, offset):
		if self.private is not None:
			private = self.private
		elif hasattr(self, 'fdArray') and self.fdArray is not None:
			if hasattr(self, 'fdSelect') and self.fdSelect is not None:
				fdIndex = self.fdSelect[index]
			else:
				fdIndex = 0
			private = self.fdArray[fdIndex].Private
		else:
			private = None
		return self.subrClass(data, private=private, globalSubrs=self.globalSubrs)

	def toXML(self, xmlWriter):
		"""Write the subroutines index into XML representation onto the given
		:class:`fontTools.misc.xmlWriter.XMLWriter`.

		.. code:: python

			writer = xmlWriter.XMLWriter(sys.stdout)
			tt["CFF "].cff[0].GlobalSubrs.toXML(writer)

		"""
		xmlWriter.comment(
			"The 'index' attribute is only for humans; "
			"it is ignored when parsed.")
		xmlWriter.newline()
		for i in range(len(self)):
			subr = self[i]
			if subr.needsDecompilation():
				xmlWriter.begintag("CharString", index=i, raw=1)
			else:
				xmlWriter.begintag("CharString", index=i)
			xmlWriter.newline()
			subr.toXML(xmlWriter)
			xmlWriter.endtag("CharString")
			xmlWriter.newline()

	def fromXML(self, name, attrs, content):
		if name != "CharString":
			return
		subr = self.subrClass()
		subr.fromXML(name, attrs, content)
		self.append(subr)

	def getItemAndSelector(self, index):
		sel = None
		if hasattr(self, 'fdSelect'):
			sel = self.fdSelect[index]
		return self[index], sel


class SubrsIndex(GlobalSubrsIndex):
	"""This index contains a glyph's local subroutines. A local subroutine is a
	private set of ``CharString`` data which is accessible only to the glyph to
	which the index is attached."""

	compilerClass = SubrsCompiler


class TopDictIndex(Index):
	"""This index represents the array of ``TopDict`` structures in the font
	(again, usually only one entry is present). Hence the following calls are
	equivalent:

	.. code:: python

		tt["CFF "].cff[0]
		# <fontTools.cffLib.TopDict object at 0x102ed6e50>
		tt["CFF "].cff.topDictIndex[0]
		# <fontTools.cffLib.TopDict object at 0x102ed6e50>

	"""

	compilerClass = TopDictIndexCompiler

	def __init__(self, file=None, cff2GetGlyphOrder=None, topSize=0,
			isCFF2=None):
		assert (isCFF2 is None) == (file is None)
		self.cff2GetGlyphOrder = cff2GetGlyphOrder
		if file is not None and isCFF2:
			self._isCFF2 = isCFF2
			self.items = []
			name = self.__class__.__name__
			log.log(DEBUG, "loading %s at %s", name, file.tell())
			self.file = file
			count = 1
			self.items = [None] * count
			self.offsets = [0, topSize]
			self.offsetBase = file.tell()
			# pretend we've read the whole lot
			file.seek(self.offsetBase + topSize)
			log.log(DEBUG, "    end of %s at %s", name, file.tell())
		else:
			super(TopDictIndex, self).__init__(file, isCFF2=isCFF2)

	def produceItem(self, index, data, file, offset):
		top = TopDict(
			self.strings, file, offset, self.GlobalSubrs,
			self.cff2GetGlyphOrder, isCFF2=self._isCFF2)
		top.decompile(data)
		return top

	def toXML(self, xmlWriter):
		for i in range(len(self)):
			xmlWriter.begintag("FontDict", index=i)
			xmlWriter.newline()
			self[i].toXML(xmlWriter)
			xmlWriter.endtag("FontDict")
			xmlWriter.newline()


class FDArrayIndex(Index):

	compilerClass = FDArrayIndexCompiler

	def toXML(self, xmlWriter):
		for i in range(len(self)):
			xmlWriter.begintag("FontDict", index=i)
			xmlWriter.newline()
			self[i].toXML(xmlWriter)
			xmlWriter.endtag("FontDict")
			xmlWriter.newline()

	def produceItem(self, index, data, file, offset):
		fontDict = FontDict(
			self.strings, file, offset, self.GlobalSubrs, isCFF2=self._isCFF2,
			vstore=self.vstore)
		fontDict.decompile(data)
		return fontDict

	def fromXML(self, name, attrs, content):
		if name != "FontDict":
			return
		fontDict = FontDict()
		for element in content:
			if isinstance(element, str):
				continue
			name, attrs, content = element
			fontDict.fromXML(name, attrs, content)
		self.append(fontDict)


class VarStoreData(object):

	def __init__(self, file=None, otVarStore=None):
		self.file = file
		self.data = None
		self.otVarStore = otVarStore
		self.font = TTFont()  # dummy font for the decompile function.

	def decompile(self):
		if self.file:
			class GlobalState(object):
				def __init__(self, tableType, cachingStats):
					self.tableType = tableType
					self.cachingStats = cachingStats
			globalState = GlobalState(tableType="VarStore", cachingStats={})
			# read data in from file. Assume position is correct.
			length = readCard16(self.file)
			self.data = self.file.read(length)
			globalState = {}
			reader = OTTableReader(self.data, globalState)
			self.otVarStore = ot.VarStore()
			self.otVarStore.decompile(reader, self.font)
		return self

	def compile(self):
		writer = OTTableWriter()
		self.otVarStore.compile(writer, self.font)
		# Note that this omits the initial Card16 length from the CFF2
		# VarStore data block
		self.data = writer.getAllData()

	def writeXML(self, xmlWriter, name):
		self.otVarStore.toXML(xmlWriter, self.font)

	def xmlRead(self, name, attrs, content, parent):
		self.otVarStore = ot.VarStore()
		for element in content:
			if isinstance(element, tuple):
				name, attrs, content = element
				self.otVarStore.fromXML(name, attrs, content, self.font)
			else:
				pass
		return None

	def __len__(self):
		return len(self.data)

	def getNumRegions(self, vsIndex):
		varData = self.otVarStore.VarData[vsIndex]
		numRegions = varData.VarRegionCount
		return numRegions


class FDSelect(object):

	def __init__(self, file=None, numGlyphs=None, format=None):
		if file:
			# read data in from file
			self.format = readCard8(file)
			if self.format == 0:
				from array import array
				self.gidArray = array("B", file.read(numGlyphs)).tolist()
			elif self.format == 3:
				gidArray = [None] * numGlyphs
				nRanges = readCard16(file)
				fd = None
				prev = None
				for i in range(nRanges):
					first = readCard16(file)
					if prev is not None:
						for glyphID in range(prev, first):
							gidArray[glyphID] = fd
					prev = first
					fd = readCard8(file)
				if prev is not None:
					first = readCard16(file)
					for glyphID in range(prev, first):
						gidArray[glyphID] = fd
				self.gidArray = gidArray
			elif self.format == 4:
				gidArray = [None] * numGlyphs
				nRanges = readCard32(file)
				fd = None
				prev = None
				for i in range(nRanges):
					first = readCard32(file)
					if prev is not None:
						for glyphID in range(prev, first):
							gidArray[glyphID] = fd
					prev = first
					fd = readCard16(file)
				if prev is not None:
					first = readCard32(file)
					for glyphID in range(prev, first):
						gidArray[glyphID] = fd
				self.gidArray = gidArray
			else:
				assert False, "unsupported FDSelect format: %s" % format
		else:
			# reading from XML. Make empty gidArray, and leave format as passed in.
			# format is None will result in the smallest representation being used.
			self.format = format
			self.gidArray = []

	def __len__(self):
		return len(self.gidArray)

	def __getitem__(self, index):
		return self.gidArray[index]

	def __setitem__(self, index, fdSelectValue):
		self.gidArray[index] = fdSelectValue

	def append(self, fdSelectValue):
		self.gidArray.append(fdSelectValue)


class CharStrings(object):
	"""The ``CharStrings`` in the font represent the instructions for drawing 
	each glyph. This object presents a dictionary interface to the font's
	CharStrings, indexed by glyph name:

	.. code:: python
	
		tt["CFF "].cff[0].CharStrings["a"]
		# <T2CharString (bytecode) at 103451e90>

	See :class:`fontTools.misc.psCharStrings.T1CharString` and
	:class:`fontTools.misc.psCharStrings.T2CharString` for how to decompile,
	compile and interpret the glyph drawing instructions in the returned objects.

	"""

	def __init__(self, file, charset, globalSubrs, private, fdSelect, fdArray,
			isCFF2=None):
		self.globalSubrs = globalSubrs
		if file is not None:
			self.charStringsIndex = SubrsIndex(
				file, globalSubrs, private, fdSelect, fdArray, isCFF2=isCFF2)
			self.charStrings = charStrings = {}
			for i in range(len(charset)):
				charStrings[charset[i]] = i
			# read from OTF file: charStrings.values() are indices into
			# charStringsIndex.
			self.charStringsAreIndexed = 1
		else:
			self.charStrings = {}
			# read from ttx file: charStrings.values() are actual charstrings
			self.charStringsAreIndexed = 0
			self.private = private
			if fdSelect is not None:
				self.fdSelect = fdSelect
			if fdArray is not None:
				self.fdArray = fdArray

	def keys(self):
		return list(self.charStrings.keys())

	def values(self):
		if self.charStringsAreIndexed:
			return self.charStringsIndex
		else:
			return list(self.charStrings.values())

	def has_key(self, name):
		return name in self.charStrings

	__contains__ = has_key

	def __len__(self):
		return len(self.charStrings)

	def __getitem__(self, name):
		charString = self.charStrings[name]
		if self.charStringsAreIndexed:
			charString = self.charStringsIndex[charString]
		return charString

	def __setitem__(self, name, charString):
		if self.charStringsAreIndexed:
			index = self.charStrings[name]
			self.charStringsIndex[index] = charString
		else:
			self.charStrings[name] = charString

	def getItemAndSelector(self, name):
		if self.charStringsAreIndexed:
			index = self.charStrings[name]
			return self.charStringsIndex.getItemAndSelector(index)
		else:
			if hasattr(self, 'fdArray'):
				if hasattr(self, 'fdSelect'):
					sel = self.charStrings[name].fdSelectIndex
				else:
					sel = 0
			else:
				sel = None
			return self.charStrings[name], sel

	def toXML(self, xmlWriter):
		names = sorted(self.keys())
		for name in names:
			charStr, fdSelectIndex = self.getItemAndSelector(name)
			if charStr.needsDecompilation():
				raw = [("raw", 1)]
			else:
				raw = []
			if fdSelectIndex is None:
				xmlWriter.begintag("CharString", [('name', name)] + raw)
			else:
				xmlWriter.begintag(
					"CharString",
					[('name', name), ('fdSelectIndex', fdSelectIndex)] + raw)
			xmlWriter.newline()
			charStr.toXML(xmlWriter)
			xmlWriter.endtag("CharString")
			xmlWriter.newline()

	def fromXML(self, name, attrs, content):
		for element in content:
			if isinstance(element, str):
				continue
			name, attrs, content = element
			if name != "CharString":
				continue
			fdID = -1
			if hasattr(self, "fdArray"):
				try:
					fdID = safeEval(attrs["fdSelectIndex"])
				except KeyError:
					fdID = 0
				private = self.fdArray[fdID].Private
			else:
				private = self.private

			glyphName = attrs["name"]
			charStringClass = psCharStrings.T2CharString
			charString = charStringClass(
					private=private,
					globalSubrs=self.globalSubrs)
			charString.fromXML(name, attrs, content)
			if fdID >= 0:
				charString.fdSelectIndex = fdID
			self[glyphName] = charString


def readCard8(file):
	return byteord(file.read(1))


def readCard16(file):
	value, = struct.unpack(">H", file.read(2))
	return value


def readCard32(file):
	value, = struct.unpack(">L", file.read(4))
	return value


def writeCard8(file, value):
	file.write(bytechr(value))


def writeCard16(file, value):
	file.write(struct.pack(">H", value))


def writeCard32(file, value):
	file.write(struct.pack(">L", value))


def packCard8(value):
	return bytechr(value)


def packCard16(value):
	return struct.pack(">H", value)


def packCard32(value):
	return struct.pack(">L", value)


def buildOperatorDict(table):
	d = {}
	for op, name, arg, default, conv in table:
		d[op] = (name, arg)
	return d


def buildOpcodeDict(table):
	d = {}
	for op, name, arg, default, conv in table:
		if isinstance(op, tuple):
			op = bytechr(op[0]) + bytechr(op[1])
		else:
			op = bytechr(op)
		d[name] = (op, arg)
	return d


def buildOrder(table):
	l = []
	for op, name, arg, default, conv in table:
		l.append(name)
	return l


def buildDefaults(table):
	d = {}
	for op, name, arg, default, conv in table:
		if default is not None:
			d[name] = default
	return d


def buildConverters(table):
	d = {}
	for op, name, arg, default, conv in table:
		d[name] = conv
	return d


class SimpleConverter(object):

	def read(self, parent, value):
		if not hasattr(parent, "file"):
			return self._read(parent, value)
		file = parent.file
		pos = file.tell()
		try:
			return self._read(parent, value)
		finally:
			file.seek(pos)

	def _read(self, parent, value):
		return value

	def write(self, parent, value):
		return value

	def xmlWrite(self, xmlWriter, name, value):
		xmlWriter.simpletag(name, value=value)
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		return attrs["value"]


class ASCIIConverter(SimpleConverter):

	def _read(self, parent, value):
		return tostr(value, encoding='ascii')

	def write(self, parent, value):
		return tobytes(value, encoding='ascii')

	def xmlWrite(self, xmlWriter, name, value):
		xmlWriter.simpletag(name, value=tostr(value, encoding="ascii"))
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		return tobytes(attrs["value"], encoding=("ascii"))


class Latin1Converter(SimpleConverter):

	def _read(self, parent, value):
		return tostr(value, encoding='latin1')

	def write(self, parent, value):
		return tobytes(value, encoding='latin1')

	def xmlWrite(self, xmlWriter, name, value):
		value = tostr(value, encoding="latin1")
		if name in ['Notice', 'Copyright']:
			value = re.sub(r"[\r\n]\s+", " ", value)
		xmlWriter.simpletag(name, value=value)
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		return tobytes(attrs["value"], encoding=("latin1"))


def parseNum(s):
	try:
		value = int(s)
	except:
		value = float(s)
	return value


def parseBlendList(s):
	valueList = []
	for element in s:
		if isinstance(element, str):
			continue
		name, attrs, content = element
		blendList = attrs["value"].split()
		blendList = [eval(val) for val in blendList]
		valueList.append(blendList)
	if len(valueList) == 1:
		valueList = valueList[0]
	return valueList


class NumberConverter(SimpleConverter):
	def xmlWrite(self, xmlWriter, name, value):
		if isinstance(value, list):
			xmlWriter.begintag(name)
			xmlWriter.newline()
			xmlWriter.indent()
			blendValue = " ".join([str(val) for val in value])
			xmlWriter.simpletag(kBlendDictOpName, value=blendValue)
			xmlWriter.newline()
			xmlWriter.dedent()
			xmlWriter.endtag(name)
			xmlWriter.newline()
		else:
			xmlWriter.simpletag(name, value=value)
			xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		valueString = attrs.get("value", None)
		if valueString is None:
			value = parseBlendList(content)
		else:
			value = parseNum(attrs["value"])
		return value


class ArrayConverter(SimpleConverter):
	def xmlWrite(self, xmlWriter, name, value):
		if value and isinstance(value[0], list):
			xmlWriter.begintag(name)
			xmlWriter.newline()
			xmlWriter.indent()
			for valueList in value:
				blendValue = " ".join([str(val) for val in valueList])
				xmlWriter.simpletag(kBlendDictOpName, value=blendValue)
				xmlWriter.newline()
			xmlWriter.dedent()
			xmlWriter.endtag(name)
			xmlWriter.newline()
		else:
			value = " ".join([str(val) for val in value])
			xmlWriter.simpletag(name, value=value)
			xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		valueString = attrs.get("value", None)
		if valueString is None:
			valueList = parseBlendList(content)
		else:
			values = valueString.split()
			valueList = [parseNum(value) for value in values]
		return valueList


class TableConverter(SimpleConverter):

	def xmlWrite(self, xmlWriter, name, value):
		xmlWriter.begintag(name)
		xmlWriter.newline()
		value.toXML(xmlWriter)
		xmlWriter.endtag(name)
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		ob = self.getClass()()
		for element in content:
			if isinstance(element, str):
				continue
			name, attrs, content = element
			ob.fromXML(name, attrs, content)
		return ob


class PrivateDictConverter(TableConverter):

	def getClass(self):
		return PrivateDict

	def _read(self, parent, value):
		size, offset = value
		file = parent.file
		isCFF2 = parent._isCFF2
		try:
			vstore = parent.vstore
		except AttributeError:
			vstore = None
		priv = PrivateDict(
			parent.strings, file, offset, isCFF2=isCFF2, vstore=vstore)
		file.seek(offset)
		data = file.read(size)
		assert len(data) == size
		priv.decompile(data)
		return priv

	def write(self, parent, value):
		return (0, 0)  # dummy value


class SubrsConverter(TableConverter):

	def getClass(self):
		return SubrsIndex

	def _read(self, parent, value):
		file = parent.file
		isCFF2 = parent._isCFF2
		file.seek(parent.offset + value)  # Offset(self)
		return SubrsIndex(file, isCFF2=isCFF2)

	def write(self, parent, value):
		return 0  # dummy value


class CharStringsConverter(TableConverter):

	def _read(self, parent, value):
		file = parent.file
		isCFF2 = parent._isCFF2
		charset = parent.charset
		globalSubrs = parent.GlobalSubrs
		if hasattr(parent, "FDArray"):
			fdArray = parent.FDArray
			if hasattr(parent, "FDSelect"):
				fdSelect = parent.FDSelect
			else:
				fdSelect = None
			private = None
		else:
			fdSelect, fdArray = None, None
			private = parent.Private
		file.seek(value)  # Offset(0)
		charStrings = CharStrings(
			file, charset, globalSubrs, private, fdSelect, fdArray, isCFF2=isCFF2)
		return charStrings

	def write(self, parent, value):
		return 0  # dummy value

	def xmlRead(self, name, attrs, content, parent):
		if hasattr(parent, "FDArray"):
			# if it is a CID-keyed font, then the private Dict is extracted from the
			# parent.FDArray
			fdArray = parent.FDArray
			if hasattr(parent, "FDSelect"):
				fdSelect = parent.FDSelect
			else:
				fdSelect = None
			private = None
		else:
			# if it is a name-keyed font, then the private dict is in the top dict,
			# and
			# there is no fdArray.
			private, fdSelect, fdArray = parent.Private, None, None
		charStrings = CharStrings(
			None, None, parent.GlobalSubrs, private, fdSelect, fdArray)
		charStrings.fromXML(name, attrs, content)
		return charStrings


class CharsetConverter(SimpleConverter):
	def _read(self, parent, value):
		isCID = hasattr(parent, "ROS")
		if value > 2:
			numGlyphs = parent.numGlyphs
			file = parent.file
			file.seek(value)
			log.log(DEBUG, "loading charset at %s", value)
			format = readCard8(file)
			if format == 0:
				charset = parseCharset0(numGlyphs, file, parent.strings, isCID)
			elif format == 1 or format == 2:
				charset = parseCharset(numGlyphs, file, parent.strings, isCID, format)
			else:
				raise NotImplementedError
			assert len(charset) == numGlyphs
			log.log(DEBUG, "    charset end at %s", file.tell())
			# make sure glyph names are unique
			allNames = {}
			newCharset = []
			for glyphName in charset:
				if glyphName in allNames:
					# make up a new glyphName that's unique
					n = allNames[glyphName]
					while (glyphName + "#" + str(n)) in allNames:
						n += 1
					allNames[glyphName] = n + 1
					glyphName = glyphName + "#" + str(n)
				allNames[glyphName] = 1
				newCharset.append(glyphName)
			charset = newCharset
		else:  # offset == 0 -> no charset data.
			if isCID or "CharStrings" not in parent.rawDict:
				# We get here only when processing fontDicts from the FDArray of
				# CFF-CID fonts. Only the real topDict references the chrset.
				assert value == 0
				charset = None
			elif value == 0:
				charset = cffISOAdobeStrings
			elif value == 1:
				charset = cffIExpertStrings
			elif value == 2:
				charset = cffExpertSubsetStrings
		if charset and (len(charset) != parent.numGlyphs):
			charset = charset[:parent.numGlyphs]
		return charset

	def write(self, parent, value):
		return 0  # dummy value

	def xmlWrite(self, xmlWriter, name, value):
		# XXX only write charset when not in OT/TTX context, where we
		# dump charset as a separate "GlyphOrder" table.
		# # xmlWriter.simpletag("charset")
		xmlWriter.comment("charset is dumped separately as the 'GlyphOrder' element")
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		pass


class CharsetCompiler(object):

	def __init__(self, strings, charset, parent):
		assert charset[0] == '.notdef'
		isCID = hasattr(parent.dictObj, "ROS")
		data0 = packCharset0(charset, isCID, strings)
		data = packCharset(charset, isCID, strings)
		if len(data) < len(data0):
			self.data = data
		else:
			self.data = data0
		self.parent = parent

	def setPos(self, pos, endPos):
		self.parent.rawDict["charset"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)


def getStdCharSet(charset):
	# check to see if we can use a predefined charset value.
	predefinedCharSetVal = None
	predefinedCharSets = [
		(cffISOAdobeStringCount, cffISOAdobeStrings, 0),
		(cffExpertStringCount, cffIExpertStrings, 1),
		(cffExpertSubsetStringCount, cffExpertSubsetStrings, 2)]
	lcs = len(charset)
	for cnt, pcs, csv in predefinedCharSets:
		if predefinedCharSetVal is not None:
			break
		if lcs > cnt:
			continue
		predefinedCharSetVal = csv
		for i in range(lcs):
			if charset[i] != pcs[i]:
				predefinedCharSetVal = None
				break
	return predefinedCharSetVal


def getCIDfromName(name, strings):
	return int(name[3:])


def getSIDfromName(name, strings):
	return strings.getSID(name)


def packCharset0(charset, isCID, strings):
	fmt = 0
	data = [packCard8(fmt)]
	if isCID:
		getNameID = getCIDfromName
	else:
		getNameID = getSIDfromName

	for name in charset[1:]:
		data.append(packCard16(getNameID(name, strings)))
	return bytesjoin(data)


def packCharset(charset, isCID, strings):
	fmt = 1
	ranges = []
	first = None
	end = 0
	if isCID:
		getNameID = getCIDfromName
	else:
		getNameID = getSIDfromName

	for name in charset[1:]:
		SID = getNameID(name, strings)
		if first is None:
			first = SID
		elif end + 1 != SID:
			nLeft = end - first
			if nLeft > 255:
				fmt = 2
			ranges.append((first, nLeft))
			first = SID
		end = SID
	if end:
		nLeft = end - first
		if nLeft > 255:
			fmt = 2
		ranges.append((first, nLeft))

	data = [packCard8(fmt)]
	if fmt == 1:
		nLeftFunc = packCard8
	else:
		nLeftFunc = packCard16
	for first, nLeft in ranges:
		data.append(packCard16(first) + nLeftFunc(nLeft))
	return bytesjoin(data)


def parseCharset0(numGlyphs, file, strings, isCID):
	charset = [".notdef"]
	if isCID:
		for i in range(numGlyphs - 1):
			CID = readCard16(file)
			charset.append("cid" + str(CID).zfill(5))
	else:
		for i in range(numGlyphs - 1):
			SID = readCard16(file)
			charset.append(strings[SID])
	return charset


def parseCharset(numGlyphs, file, strings, isCID, fmt):
	charset = ['.notdef']
	count = 1
	if fmt == 1:
		nLeftFunc = readCard8
	else:
		nLeftFunc = readCard16
	while count < numGlyphs:
		first = readCard16(file)
		nLeft = nLeftFunc(file)
		if isCID:
			for CID in range(first, first + nLeft + 1):
				charset.append("cid" + str(CID).zfill(5))
		else:
			for SID in range(first, first + nLeft + 1):
				charset.append(strings[SID])
		count = count + nLeft + 1
	return charset


class EncodingCompiler(object):

	def __init__(self, strings, encoding, parent):
		assert not isinstance(encoding, str)
		data0 = packEncoding0(parent.dictObj.charset, encoding, parent.strings)
		data1 = packEncoding1(parent.dictObj.charset, encoding, parent.strings)
		if len(data0) < len(data1):
			self.data = data0
		else:
			self.data = data1
		self.parent = parent

	def setPos(self, pos, endPos):
		self.parent.rawDict["Encoding"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)


class EncodingConverter(SimpleConverter):

	def _read(self, parent, value):
		if value == 0:
			return "StandardEncoding"
		elif value == 1:
			return "ExpertEncoding"
		else:
			assert value > 1
			file = parent.file
			file.seek(value)
			log.log(DEBUG, "loading Encoding at %s", value)
			fmt = readCard8(file)
			haveSupplement = fmt & 0x80
			if haveSupplement:
				raise NotImplementedError("Encoding supplements are not yet supported")
			fmt = fmt & 0x7f
			if fmt == 0:
				encoding = parseEncoding0(parent.charset, file, haveSupplement,
						parent.strings)
			elif fmt == 1:
				encoding = parseEncoding1(parent.charset, file, haveSupplement,
						parent.strings)
			return encoding

	def write(self, parent, value):
		if value == "StandardEncoding":
			return 0
		elif value == "ExpertEncoding":
			return 1
		return 0  # dummy value

	def xmlWrite(self, xmlWriter, name, value):
		if value in ("StandardEncoding", "ExpertEncoding"):
			xmlWriter.simpletag(name, name=value)
			xmlWriter.newline()
			return
		xmlWriter.begintag(name)
		xmlWriter.newline()
		for code in range(len(value)):
			glyphName = value[code]
			if glyphName != ".notdef":
				xmlWriter.simpletag("map", code=hex(code), name=glyphName)
				xmlWriter.newline()
		xmlWriter.endtag(name)
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		if "name" in attrs:
			return attrs["name"]
		encoding = [".notdef"] * 256
		for element in content:
			if isinstance(element, str):
				continue
			name, attrs, content = element
			code = safeEval(attrs["code"])
			glyphName = attrs["name"]
			encoding[code] = glyphName
		return encoding


def parseEncoding0(charset, file, haveSupplement, strings):
	nCodes = readCard8(file)
	encoding = [".notdef"] * 256
	for glyphID in range(1, nCodes + 1):
		code = readCard8(file)
		if code != 0:
			encoding[code] = charset[glyphID]
	return encoding


def parseEncoding1(charset, file, haveSupplement, strings):
	nRanges = readCard8(file)
	encoding = [".notdef"] * 256
	glyphID = 1
	for i in range(nRanges):
		code = readCard8(file)
		nLeft = readCard8(file)
		for glyphID in range(glyphID, glyphID + nLeft + 1):
			encoding[code] = charset[glyphID]
			code = code + 1
		glyphID = glyphID + 1
	return encoding


def packEncoding0(charset, encoding, strings):
	fmt = 0
	m = {}
	for code in range(len(encoding)):
		name = encoding[code]
		if name != ".notdef":
			m[name] = code
	codes = []
	for name in charset[1:]:
		code = m.get(name)
		codes.append(code)

	while codes and codes[-1] is None:
		codes.pop()

	data = [packCard8(fmt), packCard8(len(codes))]
	for code in codes:
		if code is None:
			code = 0
		data.append(packCard8(code))
	return bytesjoin(data)


def packEncoding1(charset, encoding, strings):
	fmt = 1
	m = {}
	for code in range(len(encoding)):
		name = encoding[code]
		if name != ".notdef":
			m[name] = code
	ranges = []
	first = None
	end = 0
	for name in charset[1:]:
		code = m.get(name, -1)
		if first is None:
			first = code
		elif end + 1 != code:
			nLeft = end - first
			ranges.append((first, nLeft))
			first = code
		end = code
	nLeft = end - first
	ranges.append((first, nLeft))

	# remove unencoded glyphs at the end.
	while ranges and ranges[-1][0] == -1:
		ranges.pop()

	data = [packCard8(fmt), packCard8(len(ranges))]
	for first, nLeft in ranges:
		if first == -1:  # unencoded
			first = 0
		data.append(packCard8(first) + packCard8(nLeft))
	return bytesjoin(data)


class FDArrayConverter(TableConverter):

	def _read(self, parent, value):
		try:
			vstore = parent.VarStore
		except AttributeError:
			vstore = None
		file = parent.file
		isCFF2 = parent._isCFF2
		file.seek(value)
		fdArray = FDArrayIndex(file, isCFF2=isCFF2)
		fdArray.vstore = vstore
		fdArray.strings = parent.strings
		fdArray.GlobalSubrs = parent.GlobalSubrs
		return fdArray

	def write(self, parent, value):
		return 0  # dummy value

	def xmlRead(self, name, attrs, content, parent):
		fdArray = FDArrayIndex()
		for element in content:
			if isinstance(element, str):
				continue
			name, attrs, content = element
			fdArray.fromXML(name, attrs, content)
		return fdArray


class FDSelectConverter(SimpleConverter):

	def _read(self, parent, value):
		file = parent.file
		file.seek(value)
		fdSelect = FDSelect(file, parent.numGlyphs)
		return fdSelect

	def write(self, parent, value):
		return 0  # dummy value

	# The FDSelect glyph data is written out to XML in the charstring keys,
	# so we write out only the format selector
	def xmlWrite(self, xmlWriter, name, value):
		xmlWriter.simpletag(name, [('format', value.format)])
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		fmt = safeEval(attrs["format"])
		file = None
		numGlyphs = None
		fdSelect = FDSelect(file, numGlyphs, fmt)
		return fdSelect


class VarStoreConverter(SimpleConverter):

	def _read(self, parent, value):
		file = parent.file
		file.seek(value)
		varStore = VarStoreData(file)
		varStore.decompile()
		return varStore

	def write(self, parent, value):
		return 0  # dummy value

	def xmlWrite(self, xmlWriter, name, value):
		value.writeXML(xmlWriter, name)

	def xmlRead(self, name, attrs, content, parent):
		varStore = VarStoreData()
		varStore.xmlRead(name, attrs, content, parent)
		return varStore


def packFDSelect0(fdSelectArray):
	fmt = 0
	data = [packCard8(fmt)]
	for index in fdSelectArray:
		data.append(packCard8(index))
	return bytesjoin(data)


def packFDSelect3(fdSelectArray):
	fmt = 3
	fdRanges = []
	lenArray = len(fdSelectArray)
	lastFDIndex = -1
	for i in range(lenArray):
		fdIndex = fdSelectArray[i]
		if lastFDIndex != fdIndex:
			fdRanges.append([i, fdIndex])
			lastFDIndex = fdIndex
	sentinelGID = i + 1

	data = [packCard8(fmt)]
	data.append(packCard16(len(fdRanges)))
	for fdRange in fdRanges:
		data.append(packCard16(fdRange[0]))
		data.append(packCard8(fdRange[1]))
	data.append(packCard16(sentinelGID))
	return bytesjoin(data)


def packFDSelect4(fdSelectArray):
	fmt = 4
	fdRanges = []
	lenArray = len(fdSelectArray)
	lastFDIndex = -1
	for i in range(lenArray):
		fdIndex = fdSelectArray[i]
		if lastFDIndex != fdIndex:
			fdRanges.append([i, fdIndex])
			lastFDIndex = fdIndex
	sentinelGID = i + 1

	data = [packCard8(fmt)]
	data.append(packCard32(len(fdRanges)))
	for fdRange in fdRanges:
		data.append(packCard32(fdRange[0]))
		data.append(packCard16(fdRange[1]))
	data.append(packCard32(sentinelGID))
	return bytesjoin(data)


class FDSelectCompiler(object):

	def __init__(self, fdSelect, parent):
		fmt = fdSelect.format
		fdSelectArray = fdSelect.gidArray
		if fmt == 0:
			self.data = packFDSelect0(fdSelectArray)
		elif fmt == 3:
			self.data = packFDSelect3(fdSelectArray)
		elif fmt == 4:
			self.data = packFDSelect4(fdSelectArray)
		else:
			# choose smaller of the two formats
			data0 = packFDSelect0(fdSelectArray)
			data3 = packFDSelect3(fdSelectArray)
			if len(data0) < len(data3):
				self.data = data0
				fdSelect.format = 0
			else:
				self.data = data3
				fdSelect.format = 3

		self.parent = parent

	def setPos(self, pos, endPos):
		self.parent.rawDict["FDSelect"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)


class VarStoreCompiler(object):

	def __init__(self, varStoreData, parent):
		self.parent = parent
		if not varStoreData.data:
			varStoreData.compile()
		data = [
			packCard16(len(varStoreData.data)),
			varStoreData.data
		]
		self.data = bytesjoin(data)

	def setPos(self, pos, endPos):
		self.parent.rawDict["VarStore"] = pos

	def getDataLength(self):
		return len(self.data)

	def toFile(self, file):
		file.write(self.data)


class ROSConverter(SimpleConverter):

	def xmlWrite(self, xmlWriter, name, value):
		registry, order, supplement = value
		xmlWriter.simpletag(
			name,
			[
				('Registry', tostr(registry)),
				('Order', tostr(order)),
				('Supplement', supplement)
			])
		xmlWriter.newline()

	def xmlRead(self, name, attrs, content, parent):
		return (attrs['Registry'], attrs['Order'], safeEval(attrs['Supplement']))

topDictOperators = [
#	opcode		name			argument type	default	converter
	(25,		'maxstack',		'number',	None,	None),
	((12, 30),	'ROS',	('SID', 'SID', 'number'),	None,	ROSConverter()),
	((12, 20),	'SyntheticBase',	'number',	None,	None),
	(0,		'version',		'SID',		None,	None),
	(1,		'Notice',		'SID',		None,	Latin1Converter()),
	((12, 0),	'Copyright',		'SID',		None,	Latin1Converter()),
	(2,		'FullName',		'SID',		None,	None),
	((12, 38),	'FontName',		'SID',		None,	None),
	(3,		'FamilyName',		'SID',		None,	None),
	(4,		'Weight',		'SID',		None,	None),
	((12, 1),	'isFixedPitch',		'number',	0,	None),
	((12, 2),	'ItalicAngle',		'number',	0,	None),
	((12, 3),	'UnderlinePosition',	'number',	-100,	None),
	((12, 4),	'UnderlineThickness',	'number',	50,	None),
	((12, 5),	'PaintType',		'number',	0,	None),
	((12, 6),	'CharstringType',	'number',	2,	None),
	((12, 7),	'FontMatrix',		'array',	[0.001, 0, 0, 0.001, 0, 0],	None),
	(13,		'UniqueID',		'number',	None,	None),
	(5,		'FontBBox',		'array',	[0, 0, 0, 0],	None),
	((12, 8),	'StrokeWidth',		'number',	0,	None),
	(14,		'XUID',			'array',	None,	None),
	((12, 21),	'PostScript',		'SID',		None,	None),
	((12, 22),	'BaseFontName',		'SID',		None,	None),
	((12, 23),	'BaseFontBlend',	'delta',	None,	None),
	((12, 31),	'CIDFontVersion',	'number',	0,	None),
	((12, 32),	'CIDFontRevision',	'number',	0,	None),
	((12, 33),	'CIDFontType',		'number',	0,	None),
	((12, 34),	'CIDCount',		'number',	8720,	None),
	(15,		'charset',		'number',	None,	CharsetConverter()),
	((12, 35),	'UIDBase',		'number',	None,	None),
	(16,		'Encoding',		'number',	0,	EncodingConverter()),
	(18,		'Private',	('number', 'number'),	None,	PrivateDictConverter()),
	((12, 37),	'FDSelect',		'number',	None,	FDSelectConverter()),
	((12, 36),	'FDArray',		'number',	None,	FDArrayConverter()),
	(17,		'CharStrings',		'number',	None,	CharStringsConverter()),
	(24,		'VarStore',		'number',	None,	VarStoreConverter()),
]

topDictOperators2 = [
#	opcode		name			argument type	default	converter
	(25,		'maxstack',		'number',	None,	None),
	((12, 7),	'FontMatrix',		'array',	[0.001, 0, 0, 0.001, 0, 0],	None),
	((12, 37),	'FDSelect',		'number',	None,	FDSelectConverter()),
	((12, 36),	'FDArray',		'number',	None,	FDArrayConverter()),
	(17,		'CharStrings',		'number',	None,	CharStringsConverter()),
	(24,		'VarStore',		'number',	None,	VarStoreConverter()),
]

# Note! FDSelect and FDArray must both preceed CharStrings in the output XML build order,
# in order for the font to compile back from xml.

kBlendDictOpName = "blend"
blendOp = 23

privateDictOperators = [
#	opcode		name			argument type	default	converter
	(22,	"vsindex",		'number',	None,	None),
	(blendOp,	kBlendDictOpName,		'blendList',	None,	None), # This is for reading to/from XML: it not written to CFF.
	(6,		'BlueValues',		'delta',	None,	None),
	(7,		'OtherBlues',		'delta',	None,	None),
	(8,		'FamilyBlues',		'delta',	None,	None),
	(9,		'FamilyOtherBlues',	'delta',	None,	None),
	((12, 9),	'BlueScale',		'number',	0.039625, None),
	((12, 10),	'BlueShift',		'number',	7,	None),
	((12, 11),	'BlueFuzz',		'number',	1,	None),
	(10,		'StdHW',		'number',	None,	None),
	(11,		'StdVW',		'number',	None,	None),
	((12, 12),	'StemSnapH',		'delta',	None,	None),
	((12, 13),	'StemSnapV',		'delta',	None,	None),
	((12, 14),	'ForceBold',		'number',	0,	None),
	((12, 15),	'ForceBoldThreshold',	'number',	None,	None), # deprecated
	((12, 16),	'lenIV',		'number',	None,	None), # deprecated
	((12, 17),	'LanguageGroup',	'number',	0,	None),
	((12, 18),	'ExpansionFactor',	'number',	0.06,	None),
	((12, 19),	'initialRandomSeed',	'number',	0,	None),
	(20,		'defaultWidthX',	'number',	0,	None),
	(21,		'nominalWidthX',	'number',	0,	None),
	(19,		'Subrs',		'number',	None,	SubrsConverter()),
]

privateDictOperators2 = [
#	opcode		name			argument type	default	converter
	(22,	"vsindex",		'number',	None,	None),
	(blendOp,	kBlendDictOpName,		'blendList',	None,	None), # This is for reading to/from XML: it not written to CFF.
	(6,		'BlueValues',		'delta',	None,	None),
	(7,		'OtherBlues',		'delta',	None,	None),
	(8,		'FamilyBlues',		'delta',	None,	None),
	(9,		'FamilyOtherBlues',	'delta',	None,	None),
	((12, 9),	'BlueScale',		'number',	0.039625, None),
	((12, 10),	'BlueShift',		'number',	7,	None),
	((12, 11),	'BlueFuzz',		'number',	1,	None),
	(10,		'StdHW',		'number',	None,	None),
	(11,		'StdVW',		'number',	None,	None),
	((12, 12),	'StemSnapH',		'delta',	None,	None),
	((12, 13),	'StemSnapV',		'delta',	None,	None),
	((12, 17),	'LanguageGroup',	'number',	0,	None),
	((12, 18),	'ExpansionFactor',	'number',	0.06,	None),
	(19,		'Subrs',		'number',	None,	SubrsConverter()),
]


def addConverters(table):
	for i in range(len(table)):
		op, name, arg, default, conv = table[i]
		if conv is not None:
			continue
		if arg in ("delta", "array"):
			conv = ArrayConverter()
		elif arg == "number":
			conv = NumberConverter()
		elif arg == "SID":
			conv = ASCIIConverter()
		elif arg == 'blendList':
			conv = None
		else:
			assert False
		table[i] = op, name, arg, default, conv


addConverters(privateDictOperators)
addConverters(topDictOperators)


class TopDictDecompiler(psCharStrings.DictDecompiler):
	operators = buildOperatorDict(topDictOperators)


class PrivateDictDecompiler(psCharStrings.DictDecompiler):
	operators = buildOperatorDict(privateDictOperators)


class DictCompiler(object):
	maxBlendStack = 0

	def __init__(self, dictObj, strings, parent, isCFF2=None):
		if strings:
			assert isinstance(strings, IndexedStrings)
		if isCFF2 is None and hasattr(parent, "isCFF2"):
			isCFF2 = parent.isCFF2
			assert isCFF2 is not None
		self.isCFF2 = isCFF2
		self.dictObj = dictObj
		self.strings = strings
		self.parent = parent
		rawDict = {}
		for name in dictObj.order:
			value = getattr(dictObj, name, None)
			if value is None:
				continue
			conv = dictObj.converters[name]
			value = conv.write(dictObj, value)
			if value == dictObj.defaults.get(name):
				continue
			rawDict[name] = value
		self.rawDict = rawDict

	def setPos(self, pos, endPos):
		pass

	def getDataLength(self):
		return len(self.compile("getDataLength"))

	def compile(self, reason):
		log.log(DEBUG, "-- compiling %s for %s", self.__class__.__name__, reason)
		rawDict = self.rawDict
		data = []
		for name in self.dictObj.order:
			value = rawDict.get(name)
			if value is None:
				continue
			op, argType = self.opcodes[name]
			if isinstance(argType, tuple):
				l = len(argType)
				assert len(value) == l, "value doesn't match arg type"
				for i in range(l):
					arg = argType[i]
					v = value[i]
					arghandler = getattr(self, "arg_" + arg)
					data.append(arghandler(v))
			else:
				arghandler = getattr(self, "arg_" + argType)
				data.append(arghandler(value))
			data.append(op)
		data = bytesjoin(data)
		return data

	def toFile(self, file):
		data = self.compile("toFile")
		file.write(data)

	def arg_number(self, num):
		if isinstance(num, list):
			data = [encodeNumber(val) for val in num]
			data.append(encodeNumber(1))
			data.append(bytechr(blendOp))
			datum = bytesjoin(data)
		else:
			datum = encodeNumber(num)
		return datum

	def arg_SID(self, s):
		return psCharStrings.encodeIntCFF(self.strings.getSID(s))

	def arg_array(self, value):
		data = []
		for num in value:
			data.append(self.arg_number(num))
		return bytesjoin(data)

	def arg_delta(self, value):
		if not value:
			return b""
		val0 = value[0]
		if isinstance(val0, list):
			data = self.arg_delta_blend(value)
		else:
			out = []
			last = 0
			for v in value:
				out.append(v - last)
				last = v
			data = []
			for num in out:
				data.append(encodeNumber(num))
		return bytesjoin(data)


	def arg_delta_blend(self, value):
		"""A delta list with blend lists has to be *all* blend lists.

		The value is a list is arranged as follows::

			[
				[V0, d0..dn]
				[V1, d0..dn]
				...
				[Vm, d0..dn]
			]

		``V`` is the absolute coordinate value from the default font, and ``d0-dn``
		are the delta values from the *n* regions. Each ``V`` is an absolute
		coordinate from the default font.

		We want to return a list::

			[
				[v0, v1..vm]
				[d0..dn]
				...
				[d0..dn]
				numBlends
				blendOp
			]

		where each ``v`` is relative to the previous default font value.
		"""
		numMasters = len(value[0])
		numBlends = len(value)
		numStack = (numBlends * numMasters) + 1
		if numStack > self.maxBlendStack:
			# Figure out the max number of value we can blend
			# and divide this list up into chunks of that size.

			numBlendValues = int((self.maxBlendStack - 1) / numMasters)
			out = []
			while True:
				numVal = min(len(value), numBlendValues)
				if numVal == 0:
					break
				valList = value[0:numVal]
				out1 = self.arg_delta_blend(valList)
				out.extend(out1)
				value = value[numVal:]
		else:
			firstList = [0] * numBlends
			deltaList = [None] * numBlends
			i = 0
			prevVal = 0
			while i < numBlends:
				# For PrivateDict BlueValues, the default font
				# values are absolute, not relative.
				# Must convert these back to relative coordinates
				# befor writing to CFF2.
				defaultValue = value[i][0]
				firstList[i] = defaultValue - prevVal
				prevVal = defaultValue
				deltaList[i] = value[i][1:]
				i += 1

			relValueList = firstList
			for blendList in deltaList:
				relValueList.extend(blendList)
			out = [encodeNumber(val) for val in relValueList]
			out.append(encodeNumber(numBlends))
			out.append(bytechr(blendOp))
		return out


def encodeNumber(num):
	if isinstance(num, float):
		return psCharStrings.encodeFloat(num)
	else:
		return psCharStrings.encodeIntCFF(num)


class TopDictCompiler(DictCompiler):

	opcodes = buildOpcodeDict(topDictOperators)

	def getChildren(self, strings):
		isCFF2 = self.isCFF2
		children = []
		if self.dictObj.cff2GetGlyphOrder is None:
			if hasattr(self.dictObj, "charset") and self.dictObj.charset:
				if hasattr(self.dictObj, "ROS"):  # aka isCID
					charsetCode = None
				else:
					charsetCode = getStdCharSet(self.dictObj.charset)
				if charsetCode is None:
					children.append(CharsetCompiler(strings, self.dictObj.charset, self))
				else:
					self.rawDict["charset"] = charsetCode
			if hasattr(self.dictObj, "Encoding") and self.dictObj.Encoding:
				encoding = self.dictObj.Encoding
				if not isinstance(encoding, str):
					children.append(EncodingCompiler(strings, encoding, self))
		else:
			if hasattr(self.dictObj, "VarStore"):
				varStoreData = self.dictObj.VarStore
				varStoreComp = VarStoreCompiler(varStoreData, self)
				children.append(varStoreComp)
		if hasattr(self.dictObj, "FDSelect"):
			# I have not yet supported merging a ttx CFF-CID font, as there are
			# interesting issues about merging the FDArrays. Here I assume that
			# either the font was read from XML, and the FDSelect indices are all
			# in the charstring data, or the FDSelect array is already fully defined.
			fdSelect = self.dictObj.FDSelect
			# probably read in from XML; assume fdIndex in CharString data
			if len(fdSelect) == 0:
				charStrings = self.dictObj.CharStrings
				for name in self.dictObj.charset:
					fdSelect.append(charStrings[name].fdSelectIndex)
			fdSelectComp = FDSelectCompiler(fdSelect, self)
			children.append(fdSelectComp)
		if hasattr(self.dictObj, "CharStrings"):
			items = []
			charStrings = self.dictObj.CharStrings
			for name in self.dictObj.charset:
				items.append(charStrings[name])
			charStringsComp = CharStringsCompiler(
				items, strings, self, isCFF2=isCFF2)
			children.append(charStringsComp)
		if hasattr(self.dictObj, "FDArray"):
			# I have not yet supported merging a ttx CFF-CID font, as there are
			# interesting issues about merging the FDArrays. Here I assume that the
			# FDArray info is correct and complete.
			fdArrayIndexComp = self.dictObj.FDArray.getCompiler(strings, self)
			children.append(fdArrayIndexComp)
			children.extend(fdArrayIndexComp.getChildren(strings))
		if hasattr(self.dictObj, "Private"):
			privComp = self.dictObj.Private.getCompiler(strings, self)
			children.append(privComp)
			children.extend(privComp.getChildren(strings))
		return children


class FontDictCompiler(DictCompiler):
	opcodes = buildOpcodeDict(topDictOperators)

	def __init__(self, dictObj, strings, parent, isCFF2=None):
		super(FontDictCompiler, self).__init__(dictObj, strings, parent, isCFF2=isCFF2)
		#
		# We now take some effort to detect if there were any key/value pairs
		# supplied that were ignored in the FontDict context, and issue a warning
		# for those cases.
		#
		ignoredNames = []
		dictObj = self.dictObj
		for name in sorted(set(dictObj.converters) - set(dictObj.order)):
			if name in dictObj.rawDict:
				# The font was directly read from binary. In this
				# case, we want to report *all* "useless" key/value
				# pairs that are in the font, not just the ones that
				# are different from the default.
				ignoredNames.append(name)
			else:
				# The font was probably read from a TTX file. We only
				# warn about keys whos value is not the default. The
				# ones that have the default value will not be written
				# to binary anyway.
				default = dictObj.defaults.get(name)
				if default is not None:
					conv = dictObj.converters[name]
					default = conv.read(dictObj, default)
				if getattr(dictObj, name, None) != default:
					ignoredNames.append(name)
		if ignoredNames:
			log.warning(
				"Some CFF FDArray/FontDict keys were ignored upon compile: " +
				" ".join(sorted(ignoredNames)))

	def getChildren(self, strings):
		children = []
		if hasattr(self.dictObj, "Private"):
			privComp = self.dictObj.Private.getCompiler(strings, self)
			children.append(privComp)
			children.extend(privComp.getChildren(strings))
		return children


class PrivateDictCompiler(DictCompiler):

	maxBlendStack = maxStackLimit
	opcodes = buildOpcodeDict(privateDictOperators)

	def setPos(self, pos, endPos):
		size = endPos - pos
		self.parent.rawDict["Private"] = size, pos
		self.pos = pos

	def getChildren(self, strings):
		children = []
		if hasattr(self.dictObj, "Subrs"):
			children.append(self.dictObj.Subrs.getCompiler(strings, self))
		return children


class BaseDict(object):

	def __init__(self, strings=None, file=None, offset=None, isCFF2=None):
		assert (isCFF2 is None) == (file is None)
		self.rawDict = {}
		self.skipNames = []
		self.strings = strings
		if file is None:
			return
		self._isCFF2 = isCFF2
		self.file = file
		if offset is not None:
			log.log(DEBUG, "loading %s at %s", self.__class__.__name__, offset)
			self.offset = offset

	def decompile(self, data):
		log.log(DEBUG, "    length %s is %d", self.__class__.__name__, len(data))
		dec = self.decompilerClass(self.strings, self)
		dec.decompile(data)
		self.rawDict = dec.getDict()
		self.postDecompile()

	def postDecompile(self):
		pass

	def getCompiler(self, strings, parent, isCFF2=None):
		return self.compilerClass(self, strings, parent, isCFF2=isCFF2)

	def __getattr__(self, name):
		if name[:2] == name[-2:] == "__":
			# to make deepcopy() and pickle.load() work, we need to signal with
			# AttributeError that dunder methods like '__deepcopy__' or '__getstate__'
			# aren't implemented. For more details, see:
			# https://github.com/fonttools/fonttools/pull/1488
			raise AttributeError(name)
		value = self.rawDict.get(name, None)
		if value is None:
			value = self.defaults.get(name)
		if value is None:
			raise AttributeError(name)
		conv = self.converters[name]
		value = conv.read(self, value)
		setattr(self, name, value)
		return value

	def toXML(self, xmlWriter):
		for name in self.order:
			if name in self.skipNames:
				continue
			value = getattr(self, name, None)
			# XXX For "charset" we never skip calling xmlWrite even if the
			# value is None, so we always write the following XML comment:
			#
			# <!-- charset is dumped separately as the 'GlyphOrder' element -->
			#
			# Charset is None when 'CFF ' table is imported from XML into an
			# empty TTFont(). By writing this comment all the time, we obtain
			# the same XML output whether roundtripping XML-to-XML or
			# dumping binary-to-XML
			if value is None and name != "charset":
				continue
			conv = self.converters[name]
			conv.xmlWrite(xmlWriter, name, value)
		ignoredNames = set(self.rawDict) - set(self.order)
		if ignoredNames:
			xmlWriter.comment(
				"some keys were ignored: %s" % " ".join(sorted(ignoredNames)))
			xmlWriter.newline()

	def fromXML(self, name, attrs, content):
		conv = self.converters[name]
		value = conv.xmlRead(name, attrs, content, self)
		setattr(self, name, value)


class TopDict(BaseDict):
	"""The ``TopDict`` represents the top-level dictionary holding font
	information. CFF2 tables contain a restricted set of top-level entries
	as described `here <https://docs.microsoft.com/en-us/typography/opentype/spec/cff2#7-top-dict-data>`_,
	but CFF tables may contain a wider range of information. This information
	can be accessed through attributes or through the dictionary returned
	through the ``rawDict`` property:

	.. code:: python

		font = tt["CFF "].cff[0]
		font.FamilyName
		# 'Linux Libertine O'
		font.rawDict["FamilyName"]
		# 'Linux Libertine O'

	More information is available in the CFF file's private dictionary, accessed
	via the ``Private`` property:

	.. code:: python

		tt["CFF "].cff[0].Private.BlueValues
		# [-15, 0, 515, 515, 666, 666]
	
	"""

	defaults = buildDefaults(topDictOperators)
	converters = buildConverters(topDictOperators)
	compilerClass = TopDictCompiler
	order = buildOrder(topDictOperators)
	decompilerClass = TopDictDecompiler

	def __init__(self, strings=None, file=None, offset=None,
			GlobalSubrs=None, cff2GetGlyphOrder=None, isCFF2=None):
		super(TopDict, self).__init__(strings, file, offset, isCFF2=isCFF2)
		self.cff2GetGlyphOrder = cff2GetGlyphOrder
		self.GlobalSubrs = GlobalSubrs
		if isCFF2:
			self.defaults = buildDefaults(topDictOperators2)
			self.charset = cff2GetGlyphOrder()
			self.order = buildOrder(topDictOperators2)
		else:
			self.defaults = buildDefaults(topDictOperators)
			self.order = buildOrder(topDictOperators)

	def getGlyphOrder(self):
		"""Returns a list of glyph names in the CFF font."""
		return self.charset

	def postDecompile(self):
		offset = self.rawDict.get("CharStrings")
		if offset is None:
			return
		# get the number of glyphs beforehand.
		self.file.seek(offset)
		if self._isCFF2:
			self.numGlyphs = readCard32(self.file)
		else:
			self.numGlyphs = readCard16(self.file)

	def toXML(self, xmlWriter):
		if hasattr(self, "CharStrings"):
			self.decompileAllCharStrings()
		if hasattr(self, "ROS"):
			self.skipNames = ['Encoding']
		if not hasattr(self, "ROS") or not hasattr(self, "CharStrings"):
			# these values have default values, but I only want them to show up
			# in CID fonts.
			self.skipNames = [
				'CIDFontVersion', 'CIDFontRevision', 'CIDFontType', 'CIDCount']
		BaseDict.toXML(self, xmlWriter)

	def decompileAllCharStrings(self):
		# Make sure that all the Private Dicts have been instantiated.
		for i, charString in enumerate(self.CharStrings.values()):
			try:
				charString.decompile()
			except:
				log.error("Error in charstring %s", i)
				raise

	def recalcFontBBox(self):
		fontBBox = None
		for charString in self.CharStrings.values():
			bounds = charString.calcBounds(self.CharStrings)
			if bounds is not None:
				if fontBBox is not None:
					fontBBox = unionRect(fontBBox, bounds)
				else:
					fontBBox = bounds

		if fontBBox is None:
			self.FontBBox = self.defaults['FontBBox'][:]
		else:
			self.FontBBox = list(intRect(fontBBox))


class FontDict(BaseDict):
	#
	# Since fonttools used to pass a lot of fields that are not relevant in the FDArray
	# FontDict, there are 'ttx' files in the wild that contain all these. These got in
	# the ttx files because fonttools writes explicit values for all the TopDict default
	# values. These are not actually illegal in the context of an FDArray FontDict - you
	# can legally, per spec, put any arbitrary key/value pair in a FontDict - but are
	# useless since current major company CFF interpreters ignore anything but the set
	# listed in this file. So, we just silently skip them. An exception is Weight: this
	# is not used by any interpreter, but some foundries have asked that this be
	# supported in FDArray FontDicts just to preserve information about the design when
	# the font is being inspected.
	#
	# On top of that, there are fonts out there that contain such useless FontDict values.
	#
	# By subclassing TopDict, we *allow* all key/values from TopDict, both when reading
	# from binary or when reading from XML, but by overriding `order` with a limited
	# list of names, we ensure that only the useful names ever get exported to XML and
	# ever get compiled into the binary font.
	#
	# We override compilerClass so we can warn about "useless" key/value pairs, either
	# from the original binary font or from TTX input.
	#
	# See:
	# - https://github.com/fonttools/fonttools/issues/740
	# - https://github.com/fonttools/fonttools/issues/601
	# - https://github.com/adobe-type-tools/afdko/issues/137
	#
	defaults = {}
	converters = buildConverters(topDictOperators)
	compilerClass = FontDictCompiler
	orderCFF = ['FontName', 'FontMatrix', 'Weight', 'Private']
	orderCFF2 = ['Private']
	decompilerClass = TopDictDecompiler

	def __init__(self, strings=None, file=None, offset=None,
			GlobalSubrs=None, isCFF2=None, vstore=None):
		super(FontDict, self).__init__(strings, file, offset, isCFF2=isCFF2)
		self.vstore = vstore
		self.setCFF2(isCFF2)

	def setCFF2(self, isCFF2):
		# isCFF2 may be None.
		if isCFF2:
			self.order = self.orderCFF2
			self._isCFF2 = True
		else:
			self.order = self.orderCFF
			self._isCFF2 = False


class PrivateDict(BaseDict):
	defaults = buildDefaults(privateDictOperators)
	converters = buildConverters(privateDictOperators)
	order = buildOrder(privateDictOperators)
	decompilerClass = PrivateDictDecompiler
	compilerClass = PrivateDictCompiler

	def __init__(self, strings=None, file=None, offset=None, isCFF2=None,
			vstore=None):
		super(PrivateDict, self).__init__(strings, file, offset, isCFF2=isCFF2)
		self.vstore = vstore
		if isCFF2:
			self.defaults = buildDefaults(privateDictOperators2)
			self.order = buildOrder(privateDictOperators2)
			# Provide dummy values. This avoids needing to provide
			# an isCFF2 state in a lot of places.
			self.nominalWidthX = self.defaultWidthX = None
		else:
			self.defaults = buildDefaults(privateDictOperators)
			self.order = buildOrder(privateDictOperators)

	@property
	def in_cff2(self):
		return self._isCFF2

	def getNumRegions(self, vi=None):  # called from misc/psCharStrings.py
		# if getNumRegions is being called, we can assume that VarStore exists.
		if vi is None:
			if hasattr(self, 'vsindex'):
				vi = self.vsindex
			else:
				vi = 0
		numRegions = self.vstore.getNumRegions(vi)
		return numRegions


class IndexedStrings(object):

	"""SID -> string mapping."""

	def __init__(self, file=None):
		if file is None:
			strings = []
		else:
			strings = [
				tostr(s, encoding="latin1")
				for s in Index(file, isCFF2=False)
			]
		self.strings = strings

	def getCompiler(self):
		return IndexedStringsCompiler(self, None, self, isCFF2=False)

	def __len__(self):
		return len(self.strings)

	def __getitem__(self, SID):
		if SID < cffStandardStringCount:
			return cffStandardStrings[SID]
		else:
			return self.strings[SID - cffStandardStringCount]

	def getSID(self, s):
		if not hasattr(self, "stringMapping"):
			self.buildStringMapping()
		s = tostr(s, encoding="latin1")
		if s in cffStandardStringMapping:
			SID = cffStandardStringMapping[s]
		elif s in self.stringMapping:
			SID = self.stringMapping[s]
		else:
			SID = len(self.strings) + cffStandardStringCount
			self.strings.append(s)
			self.stringMapping[s] = SID
		return SID

	def getStrings(self):
		return self.strings

	def buildStringMapping(self):
		self.stringMapping = {}
		for index in range(len(self.strings)):
			self.stringMapping[self.strings[index]] = index + cffStandardStringCount


# The 391 Standard Strings as used in the CFF format.
# from Adobe Technical None #5176, version 1.0, 18 March 1998

cffStandardStrings = ['.notdef', 'space', 'exclam', 'quotedbl', 'numbersign',
		'dollar', 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright',
		'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', 'one',
		'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'colon',
		'semicolon', 'less', 'equal', 'greater', 'question', 'at', 'A', 'B', 'C',
		'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
		'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'bracketleft', 'backslash',
		'bracketright', 'asciicircum', 'underscore', 'quoteleft', 'a', 'b', 'c',
		'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
		's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'braceleft', 'bar', 'braceright',
		'asciitilde', 'exclamdown', 'cent', 'sterling', 'fraction', 'yen', 'florin',
		'section', 'currency', 'quotesingle', 'quotedblleft', 'guillemotleft',
		'guilsinglleft', 'guilsinglright', 'fi', 'fl', 'endash', 'dagger',
		'daggerdbl', 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase',
		'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', 'perthousand',
		'questiondown', 'grave', 'acute', 'circumflex', 'tilde', 'macron', 'breve',
		'dotaccent', 'dieresis', 'ring', 'cedilla', 'hungarumlaut', 'ogonek', 'caron',
		'emdash', 'AE', 'ordfeminine', 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae',
		'dotlessi', 'lslash', 'oslash', 'oe', 'germandbls', 'onesuperior',
		'logicalnot', 'mu', 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn',
		'onequarter', 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters',
		'twosuperior', 'registered', 'minus', 'eth', 'multiply', 'threesuperior',
		'copyright', 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring',
		'Atilde', 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave',
		'Iacute', 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute',
		'Ocircumflex', 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute',
		'Ucircumflex', 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron',
		'aacute', 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla',
		'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex',
		'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis',
		'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', 'ugrave',
		'yacute', 'ydieresis', 'zcaron', 'exclamsmall', 'Hungarumlautsmall',
		'dollaroldstyle', 'dollarsuperior', 'ampersandsmall', 'Acutesmall',
		'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', 'onedotenleader',
		'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', 'fouroldstyle',
		'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle',
		'nineoldstyle', 'commasuperior', 'threequartersemdash', 'periodsuperior',
		'questionsmall', 'asuperior', 'bsuperior', 'centsuperior', 'dsuperior',
		'esuperior', 'isuperior', 'lsuperior', 'msuperior', 'nsuperior', 'osuperior',
		'rsuperior', 'ssuperior', 'tsuperior', 'ff', 'ffi', 'ffl', 'parenleftinferior',
		'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall',
		'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', 'Hsmall',
		'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', 'Osmall', 'Psmall',
		'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', 'Vsmall', 'Wsmall', 'Xsmall',
		'Ysmall', 'Zsmall', 'colonmonetary', 'onefitted', 'rupiah', 'Tildesmall',
		'exclamdownsmall', 'centoldstyle', 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall',
		'Dieresissmall', 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall',
		'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', 'Cedillasmall',
		'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', 'seveneighths',
		'onethird', 'twothirds', 'zerosuperior', 'foursuperior', 'fivesuperior',
		'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', 'zeroinferior',
		'oneinferior', 'twoinferior', 'threeinferior', 'fourinferior', 'fiveinferior',
		'sixinferior', 'seveninferior', 'eightinferior', 'nineinferior', 'centinferior',
		'dollarinferior', 'periodinferior', 'commainferior', 'Agravesmall',
		'Aacutesmall', 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall',
		'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', 'Ecircumflexsmall',
		'Edieresissmall', 'Igravesmall', 'Iacutesmall', 'Icircumflexsmall',
		'Idieresissmall', 'Ethsmall', 'Ntildesmall', 'Ogravesmall', 'Oacutesmall',
		'Ocircumflexsmall', 'Otildesmall', 'Odieresissmall', 'OEsmall', 'Oslashsmall',
		'Ugravesmall', 'Uacutesmall', 'Ucircumflexsmall', 'Udieresissmall',
		'Yacutesmall', 'Thornsmall', 'Ydieresissmall', '001.000', '001.001', '001.002',
		'001.003', 'Black', 'Bold', 'Book', 'Light', 'Medium', 'Regular', 'Roman',
		'Semibold'
]

cffStandardStringCount = 391
assert len(cffStandardStrings) == cffStandardStringCount
# build reverse mapping
cffStandardStringMapping = {}
for _i in range(cffStandardStringCount):
	cffStandardStringMapping[cffStandardStrings[_i]] = _i

cffISOAdobeStrings = [".notdef", "space", "exclam", "quotedbl", "numbersign",
"dollar", "percent", "ampersand", "quoteright", "parenleft", "parenright",
"asterisk", "plus", "comma", "hyphen", "period", "slash", "zero", "one", "two",
"three", "four", "five", "six", "seven", "eight", "nine", "colon", "semicolon",
"less", "equal", "greater", "question", "at", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W",
"X", "Y", "Z", "bracketleft", "backslash", "bracketright", "asciicircum",
"underscore", "quoteleft", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j",
"k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z",
"braceleft", "bar", "braceright", "asciitilde", "exclamdown", "cent",
"sterling", "fraction", "yen", "florin", "section", "currency", "quotesingle",
"quotedblleft", "guillemotleft", "guilsinglleft", "guilsinglright", "fi", "fl",
"endash", "dagger", "daggerdbl", "periodcentered", "paragraph", "bullet",
"quotesinglbase", "quotedblbase", "quotedblright", "guillemotright", "ellipsis",
"perthousand", "questiondown", "grave", "acute", "circumflex", "tilde",
"macron", "breve", "dotaccent", "dieresis", "ring", "cedilla", "hungarumlaut",
"ogonek", "caron", "emdash", "AE", "ordfeminine", "Lslash", "Oslash", "OE",
"ordmasculine", "ae", "dotlessi", "lslash", "oslash", "oe", "germandbls",
"onesuperior", "logicalnot", "mu", "trademark", "Eth", "onehalf", "plusminus",
"Thorn", "onequarter", "divide", "brokenbar", "degree", "thorn",
"threequarters", "twosuperior", "registered", "minus", "eth", "multiply",
"threesuperior", "copyright", "Aacute", "Acircumflex", "Adieresis", "Agrave",
"Aring", "Atilde", "Ccedilla", "Eacute", "Ecircumflex", "Edieresis", "Egrave",
"Iacute", "Icircumflex", "Idieresis", "Igrave", "Ntilde", "Oacute",
"Ocircumflex", "Odieresis", "Ograve", "Otilde", "Scaron", "Uacute",
"Ucircumflex", "Udieresis", "Ugrave", "Yacute", "Ydieresis", "Zcaron", "aacute",
"acircumflex", "adieresis", "agrave", "aring", "atilde", "ccedilla", "eacute",
"ecircumflex", "edieresis", "egrave", "iacute", "icircumflex", "idieresis",
"igrave", "ntilde", "oacute", "ocircumflex", "odieresis", "ograve", "otilde",
"scaron", "uacute", "ucircumflex", "udieresis", "ugrave", "yacute", "ydieresis",
"zcaron"]

cffISOAdobeStringCount = 229
assert len(cffISOAdobeStrings) == cffISOAdobeStringCount

cffIExpertStrings = [".notdef", "space", "exclamsmall", "Hungarumlautsmall",
"dollaroldstyle", "dollarsuperior", "ampersandsmall", "Acutesmall",
"parenleftsuperior", "parenrightsuperior", "twodotenleader", "onedotenleader",
"comma", "hyphen", "period", "fraction", "zerooldstyle", "oneoldstyle",
"twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle", "sixoldstyle",
"sevenoldstyle", "eightoldstyle", "nineoldstyle", "colon", "semicolon",
"commasuperior", "threequartersemdash", "periodsuperior", "questionsmall",
"asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior",
"lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior",
"tsuperior", "ff", "fi", "fl", "ffi", "ffl", "parenleftinferior",
"parenrightinferior", "Circumflexsmall", "hyphensuperior", "Gravesmall",
"Asmall", "Bsmall", "Csmall", "Dsmall", "Esmall", "Fsmall", "Gsmall", "Hsmall",
"Ismall", "Jsmall", "Ksmall", "Lsmall", "Msmall", "Nsmall", "Osmall", "Psmall",
"Qsmall", "Rsmall", "Ssmall", "Tsmall", "Usmall", "Vsmall", "Wsmall", "Xsmall",
"Ysmall", "Zsmall", "colonmonetary", "onefitted", "rupiah", "Tildesmall",
"exclamdownsmall", "centoldstyle", "Lslashsmall", "Scaronsmall", "Zcaronsmall",
"Dieresissmall", "Brevesmall", "Caronsmall", "Dotaccentsmall", "Macronsmall",
"figuredash", "hypheninferior", "Ogoneksmall", "Ringsmall", "Cedillasmall",
"onequarter", "onehalf", "threequarters", "questiondownsmall", "oneeighth",
"threeeighths", "fiveeighths", "seveneighths", "onethird", "twothirds",
"zerosuperior", "onesuperior", "twosuperior", "threesuperior", "foursuperior",
"fivesuperior", "sixsuperior", "sevensuperior", "eightsuperior", "ninesuperior",
"zeroinferior", "oneinferior", "twoinferior", "threeinferior", "fourinferior",
"fiveinferior", "sixinferior", "seveninferior", "eightinferior", "nineinferior",
"centinferior", "dollarinferior", "periodinferior", "commainferior",
"Agravesmall", "Aacutesmall", "Acircumflexsmall", "Atildesmall",
"Adieresissmall", "Aringsmall", "AEsmall", "Ccedillasmall", "Egravesmall",
"Eacutesmall", "Ecircumflexsmall", "Edieresissmall", "Igravesmall",
"Iacutesmall", "Icircumflexsmall", "Idieresissmall", "Ethsmall", "Ntildesmall",
"Ogravesmall", "Oacutesmall", "Ocircumflexsmall", "Otildesmall",
"Odieresissmall", "OEsmall", "Oslashsmall", "Ugravesmall", "Uacutesmall",
"Ucircumflexsmall", "Udieresissmall", "Yacutesmall", "Thornsmall",
"Ydieresissmall"]

cffExpertStringCount = 166
assert len(cffIExpertStrings) == cffExpertStringCount

cffExpertSubsetStrings = [".notdef", "space", "dollaroldstyle",
"dollarsuperior", "parenleftsuperior", "parenrightsuperior", "twodotenleader",
"onedotenleader", "comma", "hyphen", "period", "fraction", "zerooldstyle",
"oneoldstyle", "twooldstyle", "threeoldstyle", "fouroldstyle", "fiveoldstyle",
"sixoldstyle", "sevenoldstyle", "eightoldstyle", "nineoldstyle", "colon",
"semicolon", "commasuperior", "threequartersemdash", "periodsuperior",
"asuperior", "bsuperior", "centsuperior", "dsuperior", "esuperior", "isuperior",
"lsuperior", "msuperior", "nsuperior", "osuperior", "rsuperior", "ssuperior",
"tsuperior", "ff", "fi", "fl", "ffi", "ffl", "parenleftinferior",
"parenrightinferior", "hyphensuperior", "colonmonetary", "onefitted", "rupiah",
"centoldstyle", "figuredash", "hypheninferior", "onequarter", "onehalf",
"threequarters", "oneeighth", "threeeighths", "fiveeighths", "seveneighths",
"onethird", "twothirds", "zerosuperior", "onesuperior", "twosuperior",
"threesuperior", "foursuperior", "fivesuperior", "sixsuperior", "sevensuperior",
"eightsuperior", "ninesuperior", "zeroinferior", "oneinferior", "twoinferior",
"threeinferior", "fourinferior", "fiveinferior", "sixinferior", "seveninferior",
"eightinferior", "nineinferior", "centinferior", "dollarinferior",
"periodinferior", "commainferior"]

cffExpertSubsetStringCount = 87
assert len(cffExpertSubsetStrings) == cffExpertSubsetStringCount
