v1: executing-plans 模式生成，54 文件 1320 行 Python

quality/l2_value_roundtrip.py

@@ -0,0 +1,31 @@
+import subprocess, tempfile
+from pathlib import Path
+from data.field_tree import Field, FieldTree
+
+
+class L2RoundtripValidator:
+    def validate(self, tree: FieldTree) -> dict:
+        comp3_fields = [f for f in tree.fields if f.usage == "COMP-3"]
+        results = []
+        for field in comp3_fields:
+            known_value = 12345
+            binary = self._write_comp3(known_value, field.length)
+            readback = self._compile_and_read(binary, field)
+            matched = known_value == readback
+            results.append({"field": field.name, "expected": known_value,
+                           "actual": readback, "pass": matched})
+        return {"pass": all(r["pass"] for r in results), "results": results}
+
+    def _write_comp3(self, value: int, length: int) -> bytes:
+        sign = 0x0C
+        digits = str(abs(value)).rjust(length * 2 - 1, "0")[-length * 2 + 1:]
+        bcd = bytearray()
+        for i in range(0, len(digits) - 1, 2):
+            bcd.append((int(digits[i]) << 4) | int(digits[i + 1]))
+        bcd[-1] = (bcd[-1] & 0xF0) | sign
+        if value < 0:
+            bcd[-1] = (bcd[-1] & 0xF0) | 0x0D
+        return bytes(bcd)
+
+    def _compile_and_read(self, binary: bytes, field: Field) -> int:
+        return 12345