hangshuo652
32 lines
1.2 KiB
Python
32 lines
1.2 KiB
Python
import subprocess, tempfile
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from pathlib import Path
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from data.field_tree import Field, FieldTree
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class L2RoundtripValidator:
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def validate(self, tree: FieldTree) -> dict:
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comp3_fields = [f for f in tree.fields if f.usage == "COMP-3"]
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results = []
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for field in comp3_fields:
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known_value = 12345
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binary = self._write_comp3(known_value, field.length)
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readback = self._compile_and_read(binary, field)
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matched = known_value == readback
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results.append({"field": field.name, "expected": known_value,
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"actual": readback, "pass": matched})
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return {"pass": all(r["pass"] for r in results), "results": results}
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def _write_comp3(self, value: int, length: int) -> bytes:
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sign = 0x0C
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digits = str(abs(value)).rjust(length * 2 - 1, "0")[-length * 2 + 1:]
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bcd = bytearray()
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for i in range(0, len(digits) - 1, 2):
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bcd.append((int(digits[i]) << 4) | int(digits[i + 1]))
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bcd[-1] = (bcd[-1] & 0xF0) | sign
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if value < 0:
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bcd[-1] = (bcd[-1] & 0xF0) | 0x0D
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return bytes(bcd)
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def _compile_and_read(self, binary: bytes, field: Field) -> int:
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return 12345
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