feat: acquire-core full legacy C corpus (~2066 files, build-verified) + generator + inventory

app/common/st_cu_0001.c

@@ -0,0 +1,37 @@
+/* @tier easy @module st @transform settlement-util */
+/*
+ * st_cu_0001.c - 정산수수료 공통 유틸리티 (plain C)  [tier=easy]
+ */
+#include "st_cu_0001.h"
+
+#include <string.h>
+
+/* 수수료 계산: rate_bp 는 basis point(1bp=0.01%) */
+long st_cu_0001_fee(long amount, int rate_bp)
+{
+    long fee;
+    if (amount <= 0 || rate_bp < 0)
+        return 0;
+    fee = (amount * (long)rate_bp) / 10000L;
+    if (fee < 0)
+        fee = 0;
+    return fee;
+}
+
+/* 절사(내림) 단위 정규화 */
+long st_cu_0001_round_unit(long amount, long unit)
+{
+    if (unit <= 0)
+        return amount;
+    return (amount / unit) * unit;
+}
+
+/* 금액 구간 분류: 0=소액 1=일반 2=고액 */
+int st_cu_0001_classify(long amount)
+{
+    if (amount < 10000L)
+        return 0;
+    if (amount < 1000000L)
+        return 1;
+    return 2;
+}