v3: gstack-code-gen 生成

comparator/rounding_detect.py

@@ -0,0 +1,31 @@
+from dataclasses import dataclass
+from decimal import Decimal, InvalidOperation
+
+
+@dataclass
+class RoundingResult:
+    mode: str = "EXACT"; confidence: float = 1.0; suggestion: str = ""
+
+
+def detect_rounding(c: str, j: str) -> RoundingResult:
+    cv = _d(c)
+    jv = _d(j)
+    if cv is None or jv is None:
+        return RoundingResult(mode="UNKNOWN", confidence=0, suggestion="parse error")
+    if cv == jv:
+        return RoundingResult()
+    diff = abs(float(cv - jv))
+    mag = max(abs(float(cv)), abs(float(jv)), 1)
+    rel = diff / mag
+    if diff < 2:
+        return RoundingResult("TRUNCATE", 0.6, f"Likely TRUNCATE, diff={diff}")
+    if diff < 100:
+        return RoundingResult("ROUNDING", 0.4, f"Possible rounding, diff={diff}")
+    return RoundingResult("SIGNIFICANT", 0.9, f"Significant diff={diff}")
+
+
+def _d(v):
+    try:
+        return Decimal(str(v).strip())
+    except:
+        return None