mirror of
https://codeberg.org/dnkl/foot.git
synced 2026-02-05 04:06:08 -05:00
aed9c392eb
Lookups in this table is not performance critical at all. Thus, let's compact it to bring down the binary size of foot. This brings the size of each entry down from 9 bytes to 6, bringing the size of the whole thing down from 1647 bytes to 1098 bytes, saving us 549 bytes.
96 lines
2.9 KiB
Python
96 lines
2.9 KiB
Python
#!/usr/bin/env python3
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import argparse
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import sys
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class Codepoint:
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def __init__(self, start: int, end: None|int = None):
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self.start = start
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self.end = start if end is None else end
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self.vs15 = False
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self.vs16 = False
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def __repr__(self) -> str:
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return f'{self.start:x}-{self.end:x}, vs15={self.vs15}, vs16={self.vs16}'
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument('input', type=argparse.FileType('r'))
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parser.add_argument('output', type=argparse.FileType('w'))
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opts = parser.parse_args()
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codepoints: dict[int, Codepoint] = {}
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for line in opts.input:
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line = line.rstrip()
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if not line:
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continue
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if line[0] == '#':
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continue
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cp, vs, _ = line.split(' ', maxsplit=2)
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cp = int(cp, 16)
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vs = int(vs, 16)
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assert vs == 0xfe0e or vs == 0xfe0f
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if cp not in codepoints:
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codepoints[cp] = Codepoint(cp)
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assert codepoints[cp].start == cp
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if vs == 0xfe0e:
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codepoints[cp].vs15 = True
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else:
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codepoints[cp].vs16 = True
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sorted_list = sorted(codepoints.values(), key=lambda cp: cp.start)
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compacted: list[Codepoint] = []
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for i, cp in enumerate(sorted_list):
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assert cp.end == cp.start
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if i == 0:
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compacted.append(cp)
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continue
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last_cp = compacted[-1]
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if last_cp.end == cp.start - 1 and last_cp.vs15 == cp.vs15 and last_cp.vs16 == cp.vs16:
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compacted[-1].end = cp.start
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else:
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compacted.append(cp)
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opts.output.write('#pragma once\n')
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opts.output.write('#include <stdint.h>\n')
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opts.output.write('#include <stdbool.h>\n')
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opts.output.write('\n')
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opts.output.write('struct emoji_vs {\n')
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opts.output.write(' uint32_t start:21;\n')
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opts.output.write(' uint32_t end:21;\n')
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opts.output.write(' bool vs15:1;\n')
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opts.output.write(' bool vs16:1;\n')
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opts.output.write('} __attribute__((packed));\n')
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opts.output.write('_Static_assert(sizeof(struct emoji_vs) == 6, "unexpected struct size");\n')
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opts.output.write('\n')
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opts.output.write('#if defined(FOOT_GRAPHEME_CLUSTERING)\n')
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opts.output.write('\n')
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opts.output.write(f'static const struct emoji_vs emoji_vs[{len(compacted)}] = {{\n')
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for cp in compacted:
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opts.output.write(' {\n')
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opts.output.write(f' .start = 0x{cp.start:X},\n')
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opts.output.write(f' .end = 0x{cp.end:x},\n')
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opts.output.write(f' .vs15 = {"true" if cp.vs15 else "false"},\n')
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opts.output.write(f' .vs16 = {"true" if cp.vs16 else "false"},\n')
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opts.output.write(' },\n')
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opts.output.write('};\n')
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opts.output.write('\n')
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opts.output.write('#endif /* FOOT_GRAPHEME_CLUSTERING */\n')
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if __name__ == '__main__':
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sys.exit(main())
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