463877773c
Reverse-engineering + open reimplementation workspace for Eushully's AGE/SYS4 engine (first target: Himegari). The repo root is age-reimpl/; the original game install and the extracted ALF data are siblings outside the repo and are never tracked. build/ (derived corpora) is gitignored and regenerated by the tools. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
70 lines
2.4 KiB
Python
70 lines
2.4 KiB
Python
"""Probe SYS4 script headers across the DATA1 corpus.
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Header hypothesis (offsets in bytes):
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0x00 char magic[8] "SYS4422 "
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0x08 u32 F0..F12 13 fields
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0x3C body (dword stream)
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Tests invariants and prints field stats.
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"""
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import struct
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import sys
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from pathlib import Path
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from collections import Counter
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ROOT = Path(__file__).resolve().parents[2] / "extracted" / "DATA1"
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def parse(path):
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data = path.read_bytes()
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magic = data[:8]
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fields = struct.unpack_from("<13I", data, 8)
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return data, magic, fields
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def main():
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files = sorted(ROOT.glob("*.BIN"))
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print(f"files: {len(files)}")
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magics = Counter()
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distinct = [Counter() for _ in range(13)]
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fail_f12 = [] # F12 != filedwords - 15
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fail_f6 = [] # F6 != 0x1C
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fail_f11 = [] # F11 != 0
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rel_a = Counter() # F8 + F9 vs F12
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rel_b = Counter() # F10 + F11 vs F12
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body_first = Counter()
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for p in files:
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data, magic, f = parse(p)
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magics[magic] += 1
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nd = len(data) // 4
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for i, v in enumerate(f):
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distinct[i][v] += 1
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if f[12] != nd - 15:
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fail_f12.append((p.name, f[12], nd - 15))
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if f[6] != 0x1C:
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fail_f6.append((p.name, f[6]))
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if f[11] != 0:
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fail_f11.append((p.name, f[10], f[11], f[12]))
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rel_a["F8+F9==F12" if f[8] + f[9] == f[12] else
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("F8+F9<F12" if f[8] + f[9] < f[12] else "F8+F9>F12")] += 1
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rel_b["F10+F11==F12" if f[10] + f[11] == f[12] else
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("F10+F11<F12" if f[10] + f[11] < f[12] else "F10+F11>F12")] += 1
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if len(data) >= 0x40:
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body_first[struct.unpack_from("<I", data, 0x3C)[0]] += 1
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print("magics:", dict(magics))
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print("\nfield value diversity (distinct count; top values):")
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for i, c in enumerate(distinct):
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top = ", ".join(f"{v:#x}x{n}" for v, n in c.most_common(4))
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print(f" F{i:<2} @0x{8+i*4:02X}: {len(c):4} distinct | {top}")
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print(f"\nF6==0x1C fails: {len(fail_f6)} {fail_f6[:5]}")
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print(f"F12==dwords-15 fails: {len(fail_f12)} {fail_f12[:5]}")
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print(f"F11!=0 count: {len(fail_f11)} {fail_f11[:5]}")
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print("rel F8+F9 vs F12:", dict(rel_a))
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print("rel F10+F11 vs F12:", dict(rel_b))
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print("\nfirst body dword (top 15):",
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", ".join(f"{v:#x}x{n}" for v, n in body_first.most_common(15)))
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if __name__ == "__main__":
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main()
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