harfbuzz/src/gen-use-table.py

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#!/usr/bin/env python3
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# flake8: noqa: F821
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"""usage: ./gen-use-table.py IndicSyllabicCategory.txt IndicPositionalCategory.txt UnicodeData.txt Blocks.txt
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Input file:
* https://unicode.org/Public/UCD/latest/ucd/IndicSyllabicCategory.txt
* https://unicode.org/Public/UCD/latest/ucd/IndicPositionalCategory.txt
* https://unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
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* https://unicode.org/Public/UCD/latest/ucd/Blocks.txt
"""
import sys
if len (sys.argv) != 5:
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sys.exit (__doc__)
BLACKLISTED_BLOCKS = ["Thai", "Lao"]
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files = [open (x, encoding='utf-8') for x in sys.argv[1:]]
headers = [[f.readline () for i in range (2)] for j,f in enumerate(files) if j != 2]
headers.append (["UnicodeData.txt does not have a header."])
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data = [{} for _ in files]
values = [{} for _ in files]
for i, f in enumerate (files):
for line in f:
j = line.find ('#')
if j >= 0:
line = line[:j]
fields = [x.strip () for x in line.split (';')]
if len (fields) == 1:
continue
uu = fields[0].split ('..')
start = int (uu[0], 16)
if len (uu) == 1:
end = start
else:
end = int (uu[1], 16)
t = fields[1 if i != 2 else 2]
for u in range (start, end + 1):
data[i][u] = t
values[i][t] = values[i].get (t, 0) + end - start + 1
defaults = ('Other', 'Not_Applicable', 'Cn', 'No_Block')
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# TODO Characters that are not in Unicode Indic files, but used in USE
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data[0][0x034F] = defaults[0]
data[0][0x1B61] = defaults[0]
data[0][0x1B63] = defaults[0]
data[0][0x1B64] = defaults[0]
data[0][0x1B65] = defaults[0]
data[0][0x1B66] = defaults[0]
data[0][0x1B67] = defaults[0]
data[0][0x1B69] = defaults[0]
data[0][0x1B6A] = defaults[0]
data[0][0x2060] = defaults[0]
# TODO https://github.com/harfbuzz/harfbuzz/pull/1685
data[0][0x1B5B] = 'Consonant_Placeholder'
data[0][0x1B5C] = 'Consonant_Placeholder'
data[0][0x1B5F] = 'Consonant_Placeholder'
data[0][0x1B62] = 'Consonant_Placeholder'
data[0][0x1B68] = 'Consonant_Placeholder'
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# TODO https://github.com/harfbuzz/harfbuzz/issues/1035
data[0][0x11C44] = 'Consonant_Placeholder'
data[0][0x11C45] = 'Consonant_Placeholder'
# TODO https://github.com/harfbuzz/harfbuzz/pull/1399
data[0][0x111C8] = 'Consonant_Placeholder'
for u in range (0xFE00, 0xFE0F + 1):
data[0][u] = defaults[0]
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# Merge data into one dict:
for i,v in enumerate (defaults):
values[i][v] = values[i].get (v, 0) + 1
combined = {}
for i,d in enumerate (data):
for u,v in d.items ():
if i >= 2 and not u in combined:
continue
if not u in combined:
combined[u] = list (defaults)
combined[u][i] = v
combined = {k:v for k,v in combined.items() if v[3] not in BLACKLISTED_BLOCKS}
data = combined
del combined
property_names = [
# General_Category
'Cc', 'Cf', 'Cn', 'Co', 'Cs', 'Ll', 'Lm', 'Lo', 'Lt', 'Lu', 'Mc',
'Me', 'Mn', 'Nd', 'Nl', 'No', 'Pc', 'Pd', 'Pe', 'Pf', 'Pi', 'Po',
'Ps', 'Sc', 'Sk', 'Sm', 'So', 'Zl', 'Zp', 'Zs',
# Indic_Syllabic_Category
'Other',
'Bindu',
'Visarga',
'Avagraha',
'Nukta',
'Virama',
'Pure_Killer',
'Invisible_Stacker',
'Vowel_Independent',
'Vowel_Dependent',
'Vowel',
'Consonant_Placeholder',
'Consonant',
'Consonant_Dead',
'Consonant_With_Stacker',
'Consonant_Prefixed',
'Consonant_Preceding_Repha',
'Consonant_Succeeding_Repha',
'Consonant_Subjoined',
'Consonant_Medial',
'Consonant_Final',
'Consonant_Head_Letter',
'Consonant_Initial_Postfixed',
'Modifying_Letter',
'Tone_Letter',
'Tone_Mark',
'Gemination_Mark',
'Cantillation_Mark',
'Register_Shifter',
'Syllable_Modifier',
'Consonant_Killer',
'Non_Joiner',
'Joiner',
'Number_Joiner',
'Number',
'Brahmi_Joining_Number',
# Indic_Positional_Category
'Not_Applicable',
'Right',
'Left',
'Visual_Order_Left',
'Left_And_Right',
'Top',
'Bottom',
'Top_And_Bottom',
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'Top_And_Bottom_And_Left',
'Top_And_Right',
'Top_And_Left',
'Top_And_Left_And_Right',
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'Bottom_And_Left',
'Bottom_And_Right',
'Top_And_Bottom_And_Right',
'Overstruck',
]
class PropertyValue(object):
def __init__(self, name_):
self.name = name_
def __str__(self):
return self.name
def __eq__(self, other):
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return self.name == (other if isinstance(other, str) else other.name)
def __ne__(self, other):
return not (self == other)
def __hash__(self):
return hash(str(self))
property_values = {}
for name in property_names:
value = PropertyValue(name)
assert value not in property_values
assert value not in globals()
property_values[name] = value
globals().update(property_values)
def is_BASE(U, UISC, UGC):
return (UISC in [Number, Consonant, Consonant_Head_Letter,
#SPEC-DRAFT Consonant_Placeholder,
Tone_Letter,
Vowel_Independent #SPEC-DRAFT
] or
(UGC == Lo and UISC in [Avagraha, Bindu, Consonant_Final, Consonant_Medial,
Consonant_Subjoined, Vowel, Vowel_Dependent]))
def is_BASE_IND(U, UISC, UGC):
#SPEC-DRAFT return (UISC in [Consonant_Dead, Modifying_Letter] or UGC == Po)
return (UISC in [Consonant_Dead, Modifying_Letter] or
(UGC == Po and not U in [0x104B, 0x104E, 0x1B5B, 0x1B5C, 0x1B5F, 0x2022, 0x111C8, 0x11A3F, 0x11A45, 0x11C44, 0x11C45]) or
False # SPEC-DRAFT-OUTDATED! U == 0x002D
)
def is_BASE_NUM(U, UISC, UGC):
return UISC == Brahmi_Joining_Number
def is_BASE_OTHER(U, UISC, UGC):
if UISC == Consonant_Placeholder: return True #SPEC-DRAFT
#SPEC-DRAFT return U in [0x00A0, 0x00D7, 0x2015, 0x2022, 0x25CC, 0x25FB, 0x25FC, 0x25FD, 0x25FE]
return U in [0x2015, 0x2022, 0x25FB, 0x25FC, 0x25FD, 0x25FE]
def is_CGJ(U, UISC, UGC):
return U == 0x034F
def is_CONS_FINAL(U, UISC, UGC):
return ((UISC == Consonant_Final and UGC != Lo) or
UISC == Consonant_Succeeding_Repha)
def is_CONS_FINAL_MOD(U, UISC, UGC):
#SPEC-DRAFT return UISC in [Consonant_Final_Modifier, Syllable_Modifier]
return UISC == Syllable_Modifier
def is_CONS_MED(U, UISC, UGC):
# Consonant_Initial_Postfixed is new in Unicode 11; not in the spec.
return (UISC == Consonant_Medial and UGC != Lo or
UISC == Consonant_Initial_Postfixed)
def is_CONS_MOD(U, UISC, UGC):
return UISC in [Nukta, Gemination_Mark, Consonant_Killer]
def is_CONS_SUB(U, UISC, UGC):
#SPEC-DRAFT return UISC == Consonant_Subjoined
return UISC == Consonant_Subjoined and UGC != Lo
def is_CONS_WITH_STACKER(U, UISC, UGC):
return UISC == Consonant_With_Stacker
def is_HALANT(U, UISC, UGC):
return (UISC in [Virama, Invisible_Stacker]
and not is_HALANT_OR_VOWEL_MODIFIER(U, UISC, UGC)
and not is_SAKOT(U, UISC, UGC))
def is_HALANT_OR_VOWEL_MODIFIER(U, UISC, UGC):
# https://github.com/harfbuzz/harfbuzz/issues/1102
# https://github.com/harfbuzz/harfbuzz/issues/1379
return U in [0x11046, 0x1134D]
def is_HALANT_NUM(U, UISC, UGC):
return UISC == Number_Joiner
def is_ZWNJ(U, UISC, UGC):
return UISC == Non_Joiner
def is_ZWJ(U, UISC, UGC):
return UISC == Joiner
def is_Word_Joiner(U, UISC, UGC):
return U == 0x2060
def is_OTHER(U, UISC, UGC):
#SPEC-OUTDATED return UGC == Zs # or any other SCRIPT_COMMON characters
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return (UISC == Other
and not is_SYM(U, UISC, UGC)
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and not is_SYM_MOD(U, UISC, UGC)
and not is_CGJ(U, UISC, UGC)
and not is_Word_Joiner(U, UISC, UGC)
and not is_VARIATION_SELECTOR(U, UISC, UGC)
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)
def is_Reserved(U, UISC, UGC):
return UGC == 'Cn'
def is_REPHA(U, UISC, UGC):
return UISC in [Consonant_Preceding_Repha, Consonant_Prefixed]
def is_SAKOT(U, UISC, UGC):
return U == 0x1A60
def is_SYM(U, UISC, UGC):
if U == 0x25CC: return False #SPEC-DRAFT
#SPEC-DRAFT return UGC in [So, Sc] or UISC == Symbol_Letter
return UGC in [So, Sc] and U not in [0x1B62, 0x1B68]
def is_SYM_MOD(U, UISC, UGC):
return U in [0x1B6B, 0x1B6C, 0x1B6D, 0x1B6E, 0x1B6F, 0x1B70, 0x1B71, 0x1B72, 0x1B73]
def is_VARIATION_SELECTOR(U, UISC, UGC):
return 0xFE00 <= U <= 0xFE0F
def is_VOWEL(U, UISC, UGC):
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# https://github.com/harfbuzz/harfbuzz/issues/376
return (UISC == Pure_Killer or
(UGC != Lo and UISC in [Vowel, Vowel_Dependent] and U not in [0xAA29]))
def is_VOWEL_MOD(U, UISC, UGC):
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# https://github.com/harfbuzz/harfbuzz/issues/376
return (UISC in [Tone_Mark, Cantillation_Mark, Register_Shifter, Visarga] or
(UGC != Lo and (UISC == Bindu or U in [0xAA29])))
use_mapping = {
'B': is_BASE,
'IND': is_BASE_IND,
'N': is_BASE_NUM,
'GB': is_BASE_OTHER,
'CGJ': is_CGJ,
'F': is_CONS_FINAL,
'FM': is_CONS_FINAL_MOD,
'M': is_CONS_MED,
'CM': is_CONS_MOD,
'SUB': is_CONS_SUB,
'CS': is_CONS_WITH_STACKER,
'H': is_HALANT,
'HVM': is_HALANT_OR_VOWEL_MODIFIER,
'HN': is_HALANT_NUM,
'ZWNJ': is_ZWNJ,
'ZWJ': is_ZWJ,
'WJ': is_Word_Joiner,
'O': is_OTHER,
'Rsv': is_Reserved,
'R': is_REPHA,
'S': is_SYM,
'Sk': is_SAKOT,
'SM': is_SYM_MOD,
'VS': is_VARIATION_SELECTOR,
'V': is_VOWEL,
'VM': is_VOWEL_MOD,
}
use_positions = {
'F': {
'Abv': [Top],
'Blw': [Bottom],
'Pst': [Right],
},
'M': {
'Abv': [Top],
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'Blw': [Bottom, Bottom_And_Left, Bottom_And_Right],
'Pst': [Right],
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'Pre': [Left, Top_And_Bottom_And_Left],
},
'CM': {
'Abv': [Top],
'Blw': [Bottom],
},
'V': {
'Abv': [Top, Top_And_Bottom, Top_And_Bottom_And_Right, Top_And_Right],
'Blw': [Bottom, Overstruck, Bottom_And_Right],
'Pst': [Right, Top_And_Left, Top_And_Left_And_Right, Left_And_Right],
'Pre': [Left],
},
'VM': {
'Abv': [Top],
'Blw': [Bottom, Overstruck],
'Pst': [Right],
'Pre': [Left],
},
'SM': {
'Abv': [Top],
'Blw': [Bottom],
},
'H': None,
'HVM': None,
'B': None,
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'FM': {
'Abv': [Top],
'Blw': [Bottom],
'Pst': [Not_Applicable],
},
'SUB': None,
}
def map_to_use(data):
out = {}
items = use_mapping.items()
for U,(UISC,UIPC,UGC,UBlock) in data.items():
# Resolve Indic_Syllabic_Category
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# TODO: These don't have UISC assigned in Unicode 13.0.0, but have UIPC
if 0x1CE2 <= U <= 0x1CE8: UISC = Cantillation_Mark
# Tibetan:
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# TODO: These don't have UISC assigned in Unicode 13.0.0, but have UIPC
if 0x0F18 <= U <= 0x0F19 or 0x0F3E <= U <= 0x0F3F: UISC = Vowel_Dependent
if 0x0F86 <= U <= 0x0F87: UISC = Tone_Mark
# Overrides to allow NFC order matching syllable
# https://github.com/harfbuzz/harfbuzz/issues/1012
if UBlock == 'Tibetan' and is_VOWEL (U, UISC, UGC):
if UIPC == Top:
UIPC = Bottom
# TODO: https://github.com/harfbuzz/harfbuzz/pull/982
# also https://github.com/harfbuzz/harfbuzz/issues/1012
if UBlock == 'Chakma' and is_VOWEL (U, UISC, UGC):
if UIPC == Top:
UIPC = Bottom
elif UIPC == Bottom:
UIPC = Top
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# TODO: https://github.com/harfbuzz/harfbuzz/pull/627
if 0x1BF2 <= U <= 0x1BF3: UISC = Nukta; UIPC = Bottom
# TODO: U+1CED should only be allowed after some of
# the nasalization marks, maybe only for U+1CE9..U+1CF1.
if U == 0x1CED: UISC = Tone_Mark
# TODO: https://github.com/harfbuzz/harfbuzz/issues/1105
if U == 0x11134: UISC = Gemination_Mark
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values = [k for k,v in items if v(U,UISC,UGC)]
assert len(values) == 1, "%s %s %s %s" % (hex(U), UISC, UGC, values)
USE = values[0]
# Resolve Indic_Positional_Category
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# TODO: These should die, but have UIPC in Unicode 13.0.0
if U in [0x953, 0x954]: UIPC = Not_Applicable
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# TODO: https://github.com/harfbuzz/harfbuzz/pull/2012
if U == 0x1C29: UIPC = Left
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# TODO: These are not in USE's override list that we have, nor are they in Unicode 13.0.0
if 0xA926 <= U <= 0xA92A: UIPC = Top
# TODO: https://github.com/harfbuzz/harfbuzz/pull/1037
# and https://github.com/harfbuzz/harfbuzz/issues/1631
if U in [0x11302, 0x11303, 0x114C1]: UIPC = Top
if 0x1CF8 <= U <= 0x1CF9: UIPC = Top
assert (UIPC in [Not_Applicable, Visual_Order_Left] or
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USE == 'R' or
USE in use_positions), "%s %s %s %s %s" % (hex(U), UIPC, USE, UISC, UGC)
pos_mapping = use_positions.get(USE, None)
if pos_mapping:
values = [k for k,v in pos_mapping.items() if v and UIPC in v]
assert len(values) == 1, "%s %s %s %s %s %s" % (hex(U), UIPC, USE, UISC, UGC, values)
USE = USE + values[0]
out[U] = (USE, UBlock)
return out
defaults = ('O', 'No_Block')
data = map_to_use(data)
print ("/* == Start of generated table == */")
print ("/*")
print (" * The following table is generated by running:")
print (" *")
print (" * ./gen-use-table.py IndicSyllabicCategory.txt IndicPositionalCategory.txt UnicodeData.txt Blocks.txt")
print (" *")
print (" * on files with these headers:")
print (" *")
for h in headers:
for l in h:
print (" * %s" % (l.strip()))
print (" */")
print ()
print ('#include "hb.hh"')
print ()
print ('#ifndef HB_NO_OT_SHAPE')
print ()
print ('#include "hb-ot-shape-complex-use.hh"')
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)
if start % 16:
print (' ' * (20 + (start % 16 * 6)), end='')
num = 0
assert start % 8 == 0
assert (end+1) % 8 == 0
for u in range (start, end+1):
if u % 16 == 0:
print ()
print (" /* %04X */" % u, end='')
if u in data:
num += 1
d = data.get (u, defaults)
print ("%6s," % d[0], end='')
total += end - start + 1
used += num
if block:
last_block = block
uu = sorted (data.keys ())
last = -100000
num = 0
offset = 0
starts = []
ends = []
print ('#pragma GCC diagnostic push')
print ('#pragma GCC diagnostic ignored "-Wunused-macros"')
for k,v in sorted(use_mapping.items()):
if k in use_positions and use_positions[k]: continue
print ("#define %s USE_%s /* %s */" % (k, k, v.__name__[3:]))
for k,v in sorted(use_positions.items()):
if not v: continue
for suf in v.keys():
tag = k + suf
print ("#define %s USE_%s" % (tag, tag))
print ('#pragma GCC diagnostic pop')
print ("")
print ("static const USE_TABLE_ELEMENT_TYPE use_table[] = {")
for u in uu:
if u <= last:
continue
block = data[u][1]
start = u//8*8
end = start+1
while end in uu and block == data[end][1]:
end += 1
end = (end-1)//8*8 + 7
if start != last + 1:
if start - last <= 1+16*3:
print_block (None, last+1, start-1, data)
else:
if last >= 0:
ends.append (last + 1)
offset += ends[-1] - starts[-1]
print ()
print ()
print ("#define use_offset_0x%04xu %d" % (start, offset))
starts.append (start)
print_block (block, start, end, 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 ("USE_TABLE_ELEMENT_TYPE")
print ("hb_use_get_category (hb_codepoint_t u)")
print ("{")
print (" switch (u >> %d)" % page_bits)
print (" {")
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pages = set([u>>page_bits for u in starts+ends])
for p in sorted(pages):
print (" case 0x%0Xu:" % p)
for (start,end) in zip (starts, ends):
if p not in [start>>page_bits, end>>page_bits]: continue
offset = "use_offset_0x%04xu" % start
print (" if (hb_in_range<hb_codepoint_t> (u, 0x%04Xu, 0x%04Xu)) return use_table[u - 0x%04Xu + %s];" % (start, end-1, start, offset))
print (" break;")
print ("")
print (" default:")
print (" break;")
print (" }")
print (" return USE_O;")
print ("}")
print ()
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for k in sorted(use_mapping.keys()):
if k in use_positions and use_positions[k]: continue
print ("#undef %s" % k)
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for k,v in sorted(use_positions.items()):
if not v: continue
for suf in v.keys():
tag = k + suf
print ("#undef %s" % tag)
print ()
print ()
print ('#endif')
print ("/* == End of generated table == */")
# Maintain at least 50% occupancy in the table */
if occupancy < 50:
raise Exception ("Table too sparse, please investigate: ", occupancy)