30 lines
1.1 KiB
Python
30 lines
1.1 KiB
Python
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import difflib
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import hashlib
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import json
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from pathlib import Path
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ROOT = Path('data/1c-write-learning')
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before = (ROOT / 'baseline.bin').read_bytes()
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after_path = ROOT / 'after.bin'
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if not after_path.exists():
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raise SystemExit('after.bin is missing; capture after state first')
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after = after_path.read_bytes()
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def ranges(a: bytes, b: bytes):
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sm = difflib.SequenceMatcher(None, a, b, autojunk=False)
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out = []
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for tag, i1, i2, j1, j2 in sm.get_opcodes():
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if tag != 'equal':
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out.append({'tag': tag, 'before': [i1, i2], 'after': [j1, j2], 'before_hex': a[i1:i2].hex(), 'after_hex': b[j1:j2].hex()})
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return out
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report = {
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'before': {'bytes': len(before), 'sha1': hashlib.sha1(before).hexdigest()},
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'after': {'bytes': len(after), 'sha1': hashlib.sha1(after).hexdigest()},
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'delta_bytes': len(after) - len(before),
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'ranges': ranges(before, after),
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}
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(ROOT / 'byte_diff.json').write_text(json.dumps(report, ensure_ascii=False, indent=2), encoding='utf-8')
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print(json.dumps({**report, 'ranges': report['ranges'][:20], 'range_count': len(report['ranges'])}, ensure_ascii=False, indent=2))
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