52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
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import json
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from pathlib import Path
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from typing import Dict, Any, Tuple
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class GXLoaderError(Exception):
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pass
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class GXLoader:
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MAGIC = b'XIC'
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VERSION = 1
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@staticmethod
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def load_gx(path: str) -> Tuple[Dict[str, Any], bytes]:
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try:
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gx_file = Path(path)
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if not gx_file.exists():
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raise GXLoaderError(f"File not found: {path}")
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data = gx_file.read_bytes()
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if len(data) < 8:
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raise GXLoaderError("File too short for GX header")
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if data[:3] != GXLoader.MAGIC:
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raise GXLoaderError("Invalid magic number")
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version = data[3]
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if version != GXLoader.VERSION:
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raise GXLoaderError(f"Unsupported version: {version}")
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manifest_len = int.from_bytes(data[4:8], 'big')
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if len(data) < 8 + manifest_len:
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raise GXLoaderError("Incomplete manifest")
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manifest_json = data[8:8 + manifest_len]
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compressed_payload = data[8 + manifest_len:]
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manifest = json.loads(manifest_json.decode('utf-8'))
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return manifest, compressed_payload
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except GXLoaderError:
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raise
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except Exception as e:
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raise GXLoaderError(f"Failed to load .gx file: {e}")
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def load_gx(path: str) -> Tuple[Dict[str, Any], bytes]:
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return GXLoader.load_gx(path)
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