277 lines
6.7 KiB
Python
Executable File
277 lines
6.7 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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'Sinhala',
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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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data = [{} for f in files]
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values = [{} for f 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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data[i][u] = t
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values[i][t] = values[i].get (t, 0) + end - start + 1
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# Merge data into one dict:
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defaults = ('Other', 'Not_Applicable', 'No_Block')
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for i,v in enumerate (defaults):
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values[i][v] = values[i].get (v, 0) + 1
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combined = {}
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for i,d in enumerate (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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data = combined
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del combined
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num = len (data)
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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] = data[u]
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del 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-shape-complex-indic.hh"')
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print ()
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# Shorten values
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short = [{
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"Bindu": 'Bi',
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"Cantillation_Mark": 'Ca',
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"Joiner": 'ZWJ',
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"Non_Joiner": 'ZWNJ',
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"Number": 'Nd',
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"Visarga": 'Vs',
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"Vowel": 'Vo',
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"Vowel_Dependent": 'M',
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"Consonant_Prefixed": 'CPrf',
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"Other": 'x',
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},{
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"Not_Applicable": 'x',
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}]
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all_shorts = [{},{}]
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# Add some of the values, to make them more readable, and to avoid duplicates
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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
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what = ["INDIC_SYLLABIC_CATEGORY", "INDIC_MATRA_CATEGORY"]
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what_short = ["ISC", "IMC"]
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print ('#pragma GCC diagnostic push')
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print ('#pragma GCC diagnostic ignored "-Wunused-macros"')
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cat_defs = []
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for i in range (2):
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vv = sorted (values[i].keys ())
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for v in vv:
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v_no_and = v.replace ('_And_', '_')
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if v in short[i]:
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s = short[i][v]
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else:
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s = ''.join ([c for c in v_no_and if ord ('A') <= ord (c) <= ord ('Z')])
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if s in all_shorts[i]:
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raise Exception ("Duplicate short value alias", v, all_shorts[i][s])
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all_shorts[i][s] = v
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short[i][v] = s
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cat_defs.append ((what_short[i] + '_' + s, what[i] + '_' + v.upper (), str (values[i][v]), v))
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maxlen_s = max ([len (c[0]) for c in cat_defs])
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maxlen_l = max ([len (c[1]) for c in cat_defs])
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maxlen_n = max ([len (c[2]) for c in cat_defs])
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for s in what_short:
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print ()
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for c in [c for c in cat_defs if s in c[0]]:
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print ("#define %s %s /* %s chars; %s */" %
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(c[0].ljust (maxlen_s), c[1].ljust (maxlen_l), c[2].rjust (maxlen_n), c[3]))
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print ()
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print ('#pragma GCC diagnostic pop')
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print ()
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print ("#define _(S,M) INDIC_COMBINE_CATEGORIES (ISC_##S, IMC_##M)")
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print ()
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print ()
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total = 0
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used = 0
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last_block = None
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def print_block (block, start, end, data):
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global total, used, last_block
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if block and block != last_block:
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print ()
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print ()
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print (" /* %s */" % block)
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num = 0
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assert start % 8 == 0
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assert (end+1) % 8 == 0
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for u in range (start, end+1):
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if u % 8 == 0:
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print ()
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print (" /* %04X */" % u, end="")
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if u in data:
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num += 1
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d = data.get (u, defaults)
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print ("%9s" % ("_(%s,%s)," % (short[0][d[0]], short[1][d[1]])), end="")
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total += end - start + 1
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used += num
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if block:
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last_block = block
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uu = sorted (data.keys ())
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last = -100000
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num = 0
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offset = 0
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starts = []
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ends = []
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print ("static const INDIC_TABLE_ELEMENT_TYPE indic_table[] = {")
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for u in uu:
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if u <= last:
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continue
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block = data[u][2]
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start = u//8*8
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end = start+1
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while end in uu and block == data[end][2]:
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end += 1
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end = (end-1)//8*8 + 7
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if start != last + 1:
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if start - last <= 1+16*3:
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print_block (None, last+1, start-1, data)
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last = start-1
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else:
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if last >= 0:
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ends.append (last + 1)
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offset += ends[-1] - starts[-1]
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print ()
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print ()
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print ("#define indic_offset_0x%04xu %d" % (start, offset))
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starts.append (start)
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print_block (block, start, end, data)
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last = end
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ends.append (last + 1)
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offset += ends[-1] - starts[-1]
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print ()
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print ()
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occupancy = used * 100. / total
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page_bits = 12
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print ("}; /* Table items: %d; occupancy: %d%% */" % (offset, occupancy))
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print ()
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print ("INDIC_TABLE_ELEMENT_TYPE")
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print ("hb_indic_get_categories (hb_codepoint_t u)")
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print ("{")
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print (" switch (u >> %d)" % page_bits)
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print (" {")
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pages = set ([u>>page_bits for u in starts+ends+list (singles.keys ())])
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for p in sorted(pages):
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print (" case 0x%0Xu:" % p)
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for u,d in singles.items ():
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if p != u>>page_bits: continue
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print (" if (unlikely (u == 0x%04Xu)) return _(%s,%s);" % (u, short[0][d[0]], short[1][d[1]]))
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for (start,end) in zip (starts, ends):
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if p not in [start>>page_bits, end>>page_bits]: continue
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offset = "indic_offset_0x%04xu" % start
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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))
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print (" break;")
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print ("")
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print (" default:")
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print (" break;")
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print (" }")
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print (" return _(x,x);")
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print ("}")
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print ()
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print ("#undef _")
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for i in range (2):
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print ()
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vv = sorted (values[i].keys ())
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for v in vv:
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print ("#undef %s_%s" %
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(what_short[i], short[i][v]))
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print ()
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print ('#endif')
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print ()
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print ("/* == End of generated table == */")
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# Maintain at least 30% occupancy in the table */
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if occupancy < 30:
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raise Exception ("Table too sparse, please investigate: ", occupancy)
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