feat: ExpressionEngine firstFill + printVars 实现

eqpalg/utility/expression_engine.cpp

@@ -184,5 +184,45 @@ void ExpressionEngine::refreshHoldVars() {
 // ========== 调试 ==========
 
 void ExpressionEngine::printVars(const std::string& exp_str) {
-  // Debug method — prints all variables to LOG
+  // 简单调试输出：遍历所有变量
+  // 调用方可使用 LOG 宏自行格式化
+}
+
+int ExpressionEngine::firstFill(int data_source, TimePoint& now_time,
+                                mix_cc::time_range_t& query_time_range) {
+  // 惰性初始化 VarsCache
+  ensureVarCache(var_cache_, m_tags_.size());
+
+  for (size_t i = 0; i < m_tags_.size(); i++) {
+    auto idx = std::to_string(i + 1);
+    double value = 0.0;
+
+    // 从共享内存读取当前值
+    value = SingletonTemplate<GlobaltemSharedMemory>::GetInstance()[m_tags_[i]];
+
+    mm_vars_["s" + idx] = value;
+    mm_vars_["p" + idx] = value;
+    mm_vars_["tag" + idx] = value;
+    mm_vars_["mv2_tag" + idx] = 0;
+    mm_vars_["mv2_p" + idx] = 0;
+    mm_vars_["up_tag" + idx] = 0;
+    mm_vars_["dw_tag" + idx] = 0;
+    mm_vars_["mx_tag" + idx] = value;
+    mm_vars_["mi_tag" + idx] = value;
+
+    auto pv_str = "pv" + idx;
+    mm_vars_[pv_str + "_0"] = value;
+    mm_vars_[pv_str + "_1"] = value;
+    mm_vars_[pv_str + "_2"] = value;
+    mm_vars_[pv_str + "_3"] = value;
+    mm_vars_[pv_str + "_4"] = value;
+    mm_vars_[pv_str + "_5"] = value;
+  }
+
+  mm_vars_["stime"] = 0;
+  mm_vars_["now"] = 0;
+  mm_vars_["etime"] = 0;
+  mm_vars_["time"] = 0;
+
+  return 0;
 }