700 lines
17 KiB
Python
Executable File
700 lines
17 KiB
Python
Executable File
#!/usr/bin/env python3
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"""usage: ./gen-indic-table.py IndicSyllabicCategory.txt IndicPositionalCategory.txt Blocks.txt
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Input files:
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* https://unicode.org/Public/UCD/latest/ucd/IndicSyllabicCategory.txt
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* https://unicode.org/Public/UCD/latest/ucd/IndicPositionalCategory.txt
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* https://unicode.org/Public/UCD/latest/ucd/Blocks.txt
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"""
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import sys
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if len (sys.argv) != 4:
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sys.exit (__doc__)
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ALLOWED_SINGLES = [0x00A0, 0x25CC]
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ALLOWED_BLOCKS = [
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'Basic Latin',
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'Latin-1 Supplement',
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'Devanagari',
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'Bengali',
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'Gurmukhi',
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'Gujarati',
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'Oriya',
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'Tamil',
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'Telugu',
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'Kannada',
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'Malayalam',
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'Myanmar',
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'Khmer',
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'Vedic Extensions',
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'General Punctuation',
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'Superscripts and Subscripts',
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'Devanagari Extended',
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'Myanmar Extended-B',
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'Myanmar Extended-A',
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]
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files = [open (x, encoding='utf-8') for x in sys.argv[1:]]
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headers = [[f.readline () for i in range (2)] for f in files]
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unicode_data = [{} for _ in files]
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for i, f in enumerate (files):
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for line in f:
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j = line.find ('#')
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if j >= 0:
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line = line[:j]
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fields = [x.strip () for x in line.split (';')]
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if len (fields) == 1:
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continue
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uu = fields[0].split ('..')
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start = int (uu[0], 16)
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if len (uu) == 1:
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end = start
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else:
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end = int (uu[1], 16)
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t = fields[1]
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for u in range (start, end + 1):
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unicode_data[i][u] = t
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# Merge data into one dict:
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defaults = ('Other', 'Not_Applicable', 'No_Block')
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combined = {}
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for i,d in enumerate (unicode_data):
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for u,v in d.items ():
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if i == 2 and not u in combined:
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continue
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if not u in combined:
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combined[u] = list (defaults)
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combined[u][i] = v
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combined = {k:v for k,v in combined.items() if k in ALLOWED_SINGLES or v[2] in ALLOWED_BLOCKS}
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# Convert categories & positions types
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categories = {
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'indic' : [
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'X',
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'C',
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'V',
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'N',
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'H',
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'ZWNJ',
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'ZWJ',
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'M',
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'SM',
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'A',
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'VD',
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'PLACEHOLDER',
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'DOTTEDCIRCLE',
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'RS',
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'MPst',
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'Repha',
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'Ra',
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'CM',
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'Symbol',
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'CS',
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],
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'khmer' : [
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'VAbv',
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'VBlw',
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'VPre',
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'VPst',
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'Robatic',
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'Xgroup',
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'Ygroup',
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],
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'myanmar' : [
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'VAbv',
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'VBlw',
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'VPre',
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'VPst',
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'IV',
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'As',
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'DB',
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'GB',
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'MH',
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'MR',
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'MW',
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'MY',
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'PT',
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'VS',
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'ML',
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],
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}
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category_map = {
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'Other' : 'X',
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'Avagraha' : 'Symbol',
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'Bindu' : 'SM',
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'Brahmi_Joining_Number' : 'PLACEHOLDER', # Don't care.
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'Cantillation_Mark' : 'A',
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'Consonant' : 'C',
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'Consonant_Dead' : 'C',
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'Consonant_Final' : 'CM',
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'Consonant_Head_Letter' : 'C',
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'Consonant_Initial_Postfixed' : 'C', # TODO
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'Consonant_Killer' : 'M', # U+17CD only.
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'Consonant_Medial' : 'CM',
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'Consonant_Placeholder' : 'PLACEHOLDER',
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'Consonant_Preceding_Repha' : 'Repha',
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'Consonant_Prefixed' : 'X', # Don't care.
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'Consonant_Subjoined' : 'CM',
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'Consonant_Succeeding_Repha' : 'CM',
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'Consonant_With_Stacker' : 'CS',
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'Gemination_Mark' : 'SM', # https://github.com/harfbuzz/harfbuzz/issues/552
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'Invisible_Stacker' : 'H',
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'Joiner' : 'ZWJ',
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'Modifying_Letter' : 'X',
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'Non_Joiner' : 'ZWNJ',
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'Nukta' : 'N',
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'Number' : 'PLACEHOLDER',
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'Number_Joiner' : 'PLACEHOLDER', # Don't care.
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'Pure_Killer' : 'M', # Is like a vowel matra.
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'Register_Shifter' : 'RS',
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'Syllable_Modifier' : 'SM',
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'Tone_Letter' : 'X',
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'Tone_Mark' : 'N',
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'Virama' : 'H',
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'Visarga' : 'SM',
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'Vowel' : 'V',
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'Vowel_Dependent' : 'M',
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'Vowel_Independent' : 'V',
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}
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position_map = {
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'Not_Applicable' : 'END',
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'Left' : 'PRE_C',
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'Top' : 'ABOVE_C',
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'Bottom' : 'BELOW_C',
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'Right' : 'POST_C',
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# These should resolve to the position of the last part of the split sequence.
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'Bottom_And_Right' : 'POST_C',
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'Left_And_Right' : 'POST_C',
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'Top_And_Bottom' : 'BELOW_C',
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'Top_And_Bottom_And_Left' : 'BELOW_C',
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'Top_And_Bottom_And_Right' : 'POST_C',
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'Top_And_Left' : 'ABOVE_C',
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'Top_And_Left_And_Right' : 'POST_C',
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'Top_And_Right' : 'POST_C',
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'Overstruck' : 'AFTER_MAIN',
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'Visual_order_left' : 'PRE_M',
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}
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category_overrides = {
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# These are the variation-selectors. They only appear in the Myanmar grammar
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# but are not Myanmar-specific
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0xFE00: 'VS',
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0xFE01: 'VS',
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0xFE02: 'VS',
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0xFE03: 'VS',
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0xFE04: 'VS',
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0xFE05: 'VS',
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0xFE06: 'VS',
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0xFE07: 'VS',
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0xFE08: 'VS',
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0xFE09: 'VS',
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0xFE0A: 'VS',
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0xFE0B: 'VS',
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0xFE0C: 'VS',
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0xFE0D: 'VS',
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0xFE0E: 'VS',
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0xFE0F: 'VS',
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# These appear in the OT Myanmar spec, but are not Myanmar-specific
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0x2015: 'PLACEHOLDER',
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0x2022: 'PLACEHOLDER',
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0x25FB: 'PLACEHOLDER',
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0x25FC: 'PLACEHOLDER',
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0x25FD: 'PLACEHOLDER',
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0x25FE: 'PLACEHOLDER',
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# Indic
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0x0930: 'Ra', # Devanagari
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0x09B0: 'Ra', # Bengali
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0x09F0: 'Ra', # Bengali
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0x0A30: 'Ra', # Gurmukhi No Reph
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0x0AB0: 'Ra', # Gujarati
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0x0B30: 'Ra', # Oriya
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0x0BB0: 'Ra', # Tamil No Reph
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0x0C30: 'Ra', # Telugu Reph formed only with ZWJ
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0x0CB0: 'Ra', # Kannada
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0x0D30: 'Ra', # Malayalam No Reph, Logical Repha
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# The following act more like the Bindus.
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0x0953: 'SM',
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0x0954: 'SM',
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# U+0A40 GURMUKHI VOWEL SIGN II may be preceded by U+0A02 GURMUKHI SIGN BINDI.
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0x0A40: 'MPst',
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# The following act like consonants.
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0x0A72: 'C',
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0x0A73: 'C',
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0x1CF5: 'C',
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0x1CF6: 'C',
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# TODO: The following should only be allowed after a Visarga.
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# For now, just treat them like regular tone marks.
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0x1CE2: 'A',
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0x1CE3: 'A',
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0x1CE4: 'A',
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0x1CE5: 'A',
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0x1CE6: 'A',
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0x1CE7: 'A',
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0x1CE8: 'A',
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# TODO: The following should only be allowed after some of
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# the nasalization marks, maybe only for U+1CE9..U+1CF1.
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# For now, just treat them like tone marks.
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0x1CED: 'A',
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# The following take marks in standalone clusters, similar to Avagraha.
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0xA8F2: 'Symbol',
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0xA8F3: 'Symbol',
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0xA8F4: 'Symbol',
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0xA8F5: 'Symbol',
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0xA8F6: 'Symbol',
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0xA8F7: 'Symbol',
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0x1CE9: 'Symbol',
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0x1CEA: 'Symbol',
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0x1CEB: 'Symbol',
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0x1CEC: 'Symbol',
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0x1CEE: 'Symbol',
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0x1CEF: 'Symbol',
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0x1CF0: 'Symbol',
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0x1CF1: 'Symbol',
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0x0A51: 'M', # https://github.com/harfbuzz/harfbuzz/issues/524
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# According to ScriptExtensions.txt, these Grantha marks may also be used in Tamil,
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# so the Indic shaper needs to know their categories.
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0x11301: 'SM',
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0x11302: 'SM',
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0x11303: 'SM',
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0x1133B: 'N',
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0x1133C: 'N',
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0x0AFB: 'N', # https://github.com/harfbuzz/harfbuzz/issues/552
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0x0B55: 'N', # https://github.com/harfbuzz/harfbuzz/issues/2849
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0x09FC: 'PLACEHOLDER', # https://github.com/harfbuzz/harfbuzz/pull/1613
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0x0C80: 'PLACEHOLDER', # https://github.com/harfbuzz/harfbuzz/pull/623
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0x0D04: 'PLACEHOLDER', # https://github.com/harfbuzz/harfbuzz/pull/3511
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0x25CC: 'DOTTEDCIRCLE',
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# Khmer
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0x179A: 'Ra',
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0x17CC: 'Robatic',
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0x17C9: 'Robatic',
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0x17CA: 'Robatic',
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0x17C6: 'Xgroup',
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0x17CB: 'Xgroup',
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0x17CD: 'Xgroup',
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0x17CE: 'Xgroup',
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0x17CF: 'Xgroup',
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0x17D0: 'Xgroup',
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0x17D1: 'Xgroup',
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0x17C7: 'Ygroup',
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0x17C8: 'Ygroup',
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0x17DD: 'Ygroup',
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0x17D3: 'Ygroup', # Just guessing. Uniscribe doesn't categorize it.
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0x17D9: 'PLACEHOLDER', # https://github.com/harfbuzz/harfbuzz/issues/2384
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# Myanmar
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# https://docs.microsoft.com/en-us/typography/script-development/myanmar#analyze
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0x104E: 'C', # The spec says C, IndicSyllableCategory says Consonant_Placeholder
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0x1004: 'Ra',
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0x101B: 'Ra',
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0x105A: 'Ra',
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0x1032: 'A',
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0x1036: 'A',
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0x103A: 'As',
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#0x1040: 'D0', # XXX The spec says D0, but Uniscribe doesn't seem to do.
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0x103E: 'MH',
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0x1060: 'ML',
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0x103C: 'MR',
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0x103D: 'MW',
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0x1082: 'MW',
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0x103B: 'MY',
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0x105E: 'MY',
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0x105F: 'MY',
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0x1063: 'PT',
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0x1064: 'PT',
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0x1069: 'PT',
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0x106A: 'PT',
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0x106B: 'PT',
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0x106C: 'PT',
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0x106D: 'PT',
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0xAA7B: 'PT',
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0x1038: 'SM',
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0x1087: 'SM',
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0x1088: 'SM',
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0x1089: 'SM',
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0x108A: 'SM',
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0x108B: 'SM',
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0x108C: 'SM',
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0x108D: 'SM',
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0x108F: 'SM',
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0x109A: 'SM',
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0x109B: 'SM',
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0x109C: 'SM',
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0x104A: 'PLACEHOLDER',
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}
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position_overrides = {
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0x0A51: 'BELOW_C', # https://github.com/harfbuzz/harfbuzz/issues/524
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0x0B01: 'BEFORE_SUB', # Oriya Bindu is BeforeSub in the spec.
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}
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def matra_pos_left(u, block):
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return "PRE_M"
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def matra_pos_right(u, block):
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if block == 'Devanagari': return 'AFTER_SUB'
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if block == 'Bengali': return 'AFTER_POST'
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if block == 'Gurmukhi': return 'AFTER_POST'
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if block == 'Gujarati': return 'AFTER_POST'
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if block == 'Oriya': return 'AFTER_POST'
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if block == 'Tamil': return 'AFTER_POST'
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if block == 'Telugu': return 'BEFORE_SUB' if u <= 0x0C42 else 'AFTER_SUB'
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if block == 'Kannada': return 'BEFORE_SUB' if u < 0x0CC3 or u > 0x0CD6 else 'AFTER_SUB'
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if block == 'Malayalam': return 'AFTER_POST'
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return 'AFTER_SUB'
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def matra_pos_top(u, block):
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# BENG and MLYM don't have top matras.
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if block == 'Devanagari': return 'AFTER_SUB'
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if block == 'Gurmukhi': return 'AFTER_POST' # Deviate from spec
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if block == 'Gujarati': return 'AFTER_SUB'
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if block == 'Oriya': return 'AFTER_MAIN'
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if block == 'Tamil': return 'AFTER_SUB'
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if block == 'Telugu': return 'BEFORE_SUB'
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if block == 'Kannada': return 'BEFORE_SUB'
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return 'AFTER_SUB'
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def matra_pos_bottom(u, block):
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if block == 'Devanagari': return 'AFTER_SUB'
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if block == 'Bengali': return 'AFTER_SUB'
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if block == 'Gurmukhi': return 'AFTER_POST'
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if block == 'Gujarati': return 'AFTER_POST'
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if block == 'Oriya': return 'AFTER_SUB'
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if block == 'Tamil': return 'AFTER_POST'
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if block == 'Telugu': return 'BEFORE_SUB'
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if block == 'Kannada': return 'BEFORE_SUB'
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if block == 'Malayalam': return 'AFTER_POST'
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return "AFTER_SUB"
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def indic_matra_position(u, pos, block): # Reposition matra
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if pos == 'PRE_C': return matra_pos_left(u, block)
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if pos == 'POST_C': return matra_pos_right(u, block)
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if pos == 'ABOVE_C': return matra_pos_top(u, block)
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if pos == 'BELOW_C': return matra_pos_bottom(u, block)
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assert (False)
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def position_to_category(pos):
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if pos == 'PRE_C': return 'VPre'
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if pos == 'ABOVE_C': return 'VAbv'
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if pos == 'BELOW_C': return 'VBlw'
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if pos == 'POST_C': return 'VPst'
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assert(False)
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defaults = (category_map[defaults[0]], position_map[defaults[1]], defaults[2])
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indic_data = {}
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for k, (cat, pos, block) in combined.items():
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cat = category_map[cat]
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pos = position_map[pos]
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indic_data[k] = (cat, pos, block)
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for k,new_cat in category_overrides.items():
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(cat, pos, _) = indic_data.get(k, defaults)
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indic_data[k] = (new_cat, pos, unicode_data[2][k])
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# We only expect position for certain types
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positioned_categories = ('CM', 'SM', 'RS', 'H', 'M', 'MPst')
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for k, (cat, pos, block) in indic_data.items():
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if cat not in positioned_categories:
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pos = 'END'
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indic_data[k] = (cat, pos, block)
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# Position overrides are more complicated
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# Keep in sync with CONSONANT_FLAGS in the shaper
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consonant_categories = ('C', 'CS', 'Ra','CM', 'V', 'PLACEHOLDER', 'DOTTEDCIRCLE')
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matra_categories = ('M', 'MPst')
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smvd_categories = ('SM', 'VD', 'A', 'Symbol')
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for k, (cat, pos, block) in indic_data.items():
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if cat in consonant_categories:
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pos = 'BASE_C'
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elif cat in matra_categories:
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if block.startswith('Khmer') or block.startswith('Myanmar'):
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cat = position_to_category(pos)
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else:
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pos = indic_matra_position(k, pos, block)
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elif cat in smvd_categories:
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pos = 'SMVD';
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indic_data[k] = (cat, pos, block)
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for k,new_pos in position_overrides.items():
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(cat, pos, _) = indic_data.get(k, defaults)
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indic_data[k] = (cat, new_pos, unicode_data[2][k])
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values = [{_: 1} for _ in defaults]
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for vv in indic_data.values():
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for i,v in enumerate(vv):
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values[i][v] = values[i].get (v, 0) + 1
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# Move the outliers NO-BREAK SPACE and DOTTED CIRCLE out
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singles = {}
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for u in ALLOWED_SINGLES:
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singles[u] = indic_data[u]
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del indic_data[u]
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print ("/* == Start of generated table == */")
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print ("/*")
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print (" * The following table is generated by running:")
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print (" *")
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print (" * ./gen-indic-table.py IndicSyllabicCategory.txt IndicPositionalCategory.txt Blocks.txt")
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print (" *")
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print (" * on files with these headers:")
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print (" *")
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for h in headers:
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for l in h:
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print (" * %s" % (l.strip()))
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print (" */")
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print ()
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print ('#include "hb.hh"')
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print ()
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print ('#ifndef HB_NO_OT_SHAPE')
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print ()
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print ('#include "hb-ot-shaper-indic.hh"')
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print ()
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print ('#pragma GCC diagnostic push')
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print ('#pragma GCC diagnostic ignored "-Wunused-macros"')
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print ()
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|
|
|
# Print categories
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for shaper in categories:
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print ('#include "hb-ot-shaper-%s-machine.hh"' % shaper)
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print ()
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done = {}
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for shaper, shaper_cats in categories.items():
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print ('/* %s */' % shaper)
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for cat in shaper_cats:
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v = shaper[0].upper()
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if cat not in done:
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print ("#define OT_%s %s_Cat(%s)" % (cat, v, cat))
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done[cat] = v
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else:
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print ('static_assert (OT_%s == %s_Cat(%s), "");' % (cat, v, cat))
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print ()
|
|
|
|
# Shorten values
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|
short = [{
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"Repha": 'Rf',
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"PLACEHOLDER": 'GB',
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"DOTTEDCIRCLE": 'DC',
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"VPst": 'VR',
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|
"VPre": 'VL',
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|
"Robatic": 'Rt',
|
|
"Xgroup": 'Xg',
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|
"Ygroup": 'Yg',
|
|
"As": 'As',
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|
},{
|
|
"END": 'X',
|
|
"BASE_C": 'C',
|
|
"ABOVE_C": 'T',
|
|
"BELOW_C": 'B',
|
|
"POST_C": 'R',
|
|
"PRE_C": 'L',
|
|
"PRE_M": 'LM',
|
|
"AFTER_MAIN": 'A',
|
|
"AFTER_SUB": 'AS',
|
|
"BEFORE_SUB": 'BS',
|
|
"AFTER_POST": 'AP',
|
|
"SMVD": 'SM',
|
|
}]
|
|
all_shorts = [{},{}]
|
|
|
|
# Add some of the values, to make them more readable, and to avoid duplicates
|
|
|
|
for i in range (2):
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|
for v,s in short[i].items ():
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|
all_shorts[i][s] = v
|
|
|
|
what = ["OT", "POS"]
|
|
what_short = ["_OT", "_POS"]
|
|
cat_defs = []
|
|
for i in range (2):
|
|
vv = sorted (values[i].keys ())
|
|
for v in vv:
|
|
v_no_and = v.replace ('_And_', '_')
|
|
if v in short[i]:
|
|
s = short[i][v]
|
|
else:
|
|
s = ''.join ([c for c in v_no_and if ord ('A') <= ord (c) <= ord ('Z')])
|
|
if s in all_shorts[i]:
|
|
raise Exception ("Duplicate short value alias", v, all_shorts[i][s])
|
|
all_shorts[i][s] = v
|
|
short[i][v] = s
|
|
cat_defs.append ((what_short[i] + '_' + s, what[i] + '_' + (v.upper () if i else v), str (values[i][v]), v))
|
|
|
|
maxlen_s = max ([len (c[0]) for c in cat_defs])
|
|
maxlen_l = max ([len (c[1]) for c in cat_defs])
|
|
maxlen_n = max ([len (c[2]) for c in cat_defs])
|
|
for s in what_short:
|
|
print ()
|
|
for c in [c for c in cat_defs if s in c[0]]:
|
|
print ("#define %s %s /* %s chars; %s */" %
|
|
(c[0].ljust (maxlen_s), c[1].ljust (maxlen_l), c[2].rjust (maxlen_n), c[3]))
|
|
print ()
|
|
print ('#pragma GCC diagnostic pop')
|
|
print ()
|
|
print ("#define INDIC_COMBINE_CATEGORIES(S,M) ((S) | ((M) << 8))")
|
|
print ()
|
|
print ("#define _(S,M) INDIC_COMBINE_CATEGORIES (%s_##S, %s_##M)" % tuple(what_short))
|
|
print ()
|
|
print ()
|
|
|
|
total = 0
|
|
used = 0
|
|
last_block = None
|
|
def print_block (block, start, end, data):
|
|
global total, used, last_block
|
|
if block and block != last_block:
|
|
print ()
|
|
print ()
|
|
print (" /* %s */" % block)
|
|
num = 0
|
|
assert start % 8 == 0
|
|
assert (end+1) % 8 == 0
|
|
for u in range (start, end+1):
|
|
if u % 8 == 0:
|
|
print ()
|
|
print (" /* %04X */" % u, end="")
|
|
if u in data:
|
|
num += 1
|
|
d = data.get (u, defaults)
|
|
print ("%9s" % ("_(%s,%s)," % (short[0][d[0]], short[1][d[1]])), end="")
|
|
|
|
total += end - start + 1
|
|
used += num
|
|
if block:
|
|
last_block = block
|
|
|
|
uu = sorted (indic_data)
|
|
|
|
last = -100000
|
|
num = 0
|
|
offset = 0
|
|
starts = []
|
|
ends = []
|
|
print ("static const uint16_t indic_table[] = {")
|
|
for u in uu:
|
|
if u <= last:
|
|
continue
|
|
block = indic_data[u][2]
|
|
|
|
start = u//8*8
|
|
end = start+1
|
|
while end in uu and block == indic_data[end][2]:
|
|
end += 1
|
|
end = (end-1)//8*8 + 7
|
|
|
|
if start != last + 1:
|
|
if start - last <= 1+16*2:
|
|
print_block (None, last+1, start-1, indic_data)
|
|
else:
|
|
if last >= 0:
|
|
ends.append (last + 1)
|
|
offset += ends[-1] - starts[-1]
|
|
print ()
|
|
print ()
|
|
print ("#define indic_offset_0x%04xu %d" % (start, offset))
|
|
starts.append (start)
|
|
|
|
print_block (block, start, end, indic_data)
|
|
last = end
|
|
ends.append (last + 1)
|
|
offset += ends[-1] - starts[-1]
|
|
print ()
|
|
print ()
|
|
occupancy = used * 100. / total
|
|
page_bits = 12
|
|
print ("}; /* Table items: %d; occupancy: %d%% */" % (offset, occupancy))
|
|
print ()
|
|
print ("uint16_t")
|
|
print ("hb_indic_get_categories (hb_codepoint_t u)")
|
|
print ("{")
|
|
print (" switch (u >> %d)" % page_bits)
|
|
print (" {")
|
|
pages = set ([u>>page_bits for u in starts+ends+list (singles.keys ())])
|
|
for p in sorted(pages):
|
|
print (" case 0x%0Xu:" % p)
|
|
for u,d in singles.items ():
|
|
if p != u>>page_bits: continue
|
|
print (" if (unlikely (u == 0x%04Xu)) return _(%s,%s);" % (u, short[0][d[0]], short[1][d[1]]))
|
|
for (start,end) in zip (starts, ends):
|
|
if p not in [start>>page_bits, end>>page_bits]: continue
|
|
offset = "indic_offset_0x%04xu" % start
|
|
print (" if (hb_in_range<hb_codepoint_t> (u, 0x%04Xu, 0x%04Xu)) return indic_table[u - 0x%04Xu + %s];" % (start, end-1, start, offset))
|
|
print (" break;")
|
|
print ("")
|
|
print (" default:")
|
|
print (" break;")
|
|
print (" }")
|
|
print (" return _(X,X);")
|
|
print ("}")
|
|
print ()
|
|
print ("#undef _")
|
|
print ("#undef INDIC_COMBINE_CATEGORIES")
|
|
for i in range (2):
|
|
print ()
|
|
vv = sorted (values[i].keys ())
|
|
for v in vv:
|
|
print ("#undef %s_%s" %
|
|
(what_short[i], short[i][v]))
|
|
print ()
|
|
print ('#endif')
|
|
print ()
|
|
print ("/* == End of generated table == */")
|
|
|
|
# Maintain at least 50% occupancy in the table */
|
|
if occupancy < 50:
|
|
raise Exception ("Table too sparse, please investigate: ", occupancy)
|