Adds support for RunTimeString

Using RunTimeStrings instead of runtime parser for
macro expansion.

src/run_time_string.cc

@@ -0,0 +1,68 @@
+/*
+ * ModSecurity, http://www.modsecurity.org/
+ * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
+ *
+ * You may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * If any of the files related to licensing are missing or if you have any
+ * other questions related to licensing please contact Trustwave Holdings, Inc.
+ * directly using the email address security@modsecurity.org.
+ *
+ */
+
+
+#include <memory>
+
+#include "src/run_time_string.h"
+#include "modsecurity/transaction.h"
+#include "modsecurity/collection/variable.h"
+#include "src/variables/rule.h"
+#include "src/variables/tx.h"
+#include "src/variables/highest_severity.h"
+#include "src/utils/string.h"
+
+
+
+namespace modsecurity {
+
+
+void RunTimeString::appendText(std::string &text) {
+    std::unique_ptr<RunTimeElementHolder> r(new RunTimeElementHolder);
+    r->m_string = text;
+    m_elements.push_back(std::move(r));
+}
+
+
+void RunTimeString::appendVar(std::unique_ptr<modsecurity::Variables::Variable> var) {
+    std::unique_ptr<RunTimeElementHolder> r(new RunTimeElementHolder);
+    r->m_var = std::move(var);
+    m_elements.push_back(std::move(r));
+}
+
+
+std::string RunTimeString::evaluate(Transaction *t) {
+    std::string s;
+    //int i = 0;
+    for (auto &z : m_elements) {
+        //s.append("Element: " + std::to_string(i) + " value: ");
+        if (z->m_string.size() > 0) {
+            s.append(z->m_string);
+        } else if (z->m_var != NULL) {
+            std::vector<const collection::Variable *> l;
+            z->m_var->evaluate(t, NULL, &l);
+            if (l.size() > 0) {
+                s.append(l[0]->m_value);
+            }
+            for (auto &i : l) {
+                delete i;
+            }
+        }
+        //s.append(" -- ");
+    }
+    return s;
+}
+
+}  // namespace modsecurity