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111 lines
3 KiB
Python
111 lines
3 KiB
Python
# Needs UnicodeData.txt and confusables.txt in the current directory.
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#
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# Those can be obtained from unicode.org:
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# - http://www.unicode.org/Public/security/<VERSION>/confusables.txt
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# - http://www.unicode.org/Public/<VERSION>/ucd/UnicodeData.txt
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#
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# If executed as a script, it will generate the contents of the file
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# `src/base/unicode/confusables_data.h`.
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import unicode
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def generate_decompositions():
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ud = unicode.data()
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con = unicode.confusables()
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category = lambda x: {unicode.unhex(u["Value"]) for u in ud if u["General_Category"].startswith(x)}
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# TODO: Is this correct? They changed the decompositioning format
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nfd = {unicode.unhex(u["Value"]): unicode.unhex_sequence(u["Decomposition_Type"]) for u in ud}
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nfd = {k: v for k, v in nfd.items() if v}
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con = {unicode.unhex(c["Value"]): unicode.unhex_sequence(c["Target"]) for c in con}
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# C: Control
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# M: Combining
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# Z: Space
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ignore = category("C") | category("M") | category("Z")
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con[0x006C] = [0x0069] # LATIN SMALL LETTER L -> LATIN SMALL LETTER I
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con[0x2800] = [] # BRAILLE PATTERN BLANK
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con[0xFFFC] = [] # OBJECT REPLACEMENT CHARACTER
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interesting = ignore | set(nfd) | set(con)
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def apply(l, replacements):
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return [d for c in l for d in replacements.get(c, [c])]
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def gen(c):
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result = [c]
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while True:
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first = apply(result, nfd)
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second = apply(first, con)
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# Apply substitutions until convergence.
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if result == first and result == second:
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break
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result = second
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return [c for c in result if c not in ignore]
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return {c: gen(c) for c in interesting}
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def main():
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decompositions = generate_decompositions()
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# Deduplicate
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decomposition_set = sorted(set(tuple(x) for x in decompositions.values()))
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len_set = sorted(set(len(x) for x in decomposition_set))
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if len(len_set) > 8:
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raise ValueError("Can't pack offset (13 bit) together with len (>3bit)")
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cur_offset = 0
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decomposition_offsets = []
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for d in decomposition_set:
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decomposition_offsets.append(cur_offset)
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cur_offset += len(d)
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print("""\
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#include <stdint.h>
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struct DECOMP_SLICE
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{
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\tuint16_t offset : 13;
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\tuint16_t length : 3;
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};
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""")
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print("enum")
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print("{")
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print("\tNUM_DECOMP_LENGTHS = {},".format(len(len_set)))
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print("\tNUM_DECOMPS = {},".format(len(decompositions)))
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print("};")
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print()
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print("static const uint8_t decomp_lengths[NUM_DECOMP_LENGTHS] = {")
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for l in len_set:
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print("\t{},".format(l))
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print("};")
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print()
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print("static const int32_t decomp_chars[NUM_DECOMPS] = {")
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for k in sorted(decompositions):
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print("\t0x{:x},".format(k))
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print("};")
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print()
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print("static const struct DECOMP_SLICE decomp_slices[NUM_DECOMPS] = {")
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for k in sorted(decompositions):
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d = decompositions[k]
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i = decomposition_set.index(tuple(d))
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l = len_set.index(len(d))
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print("\t{{{}, {}}},".format(decomposition_offsets[i], l))
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print("};")
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print()
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print("static const int32_t decomp_data[] = {")
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for d in decomposition_set:
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for c in d:
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print("\t0x{:x},".format(c))
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print("};")
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if __name__ == '__main__':
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main()
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