feat: 初始代码

AM初始代码，迁移自gitlabwh

Log:
Task: https://pms.uniontech.com/task-view-108539.html
Influence:
Change-Id: I6096f97e5d68d13796ff5dc51d9858c0f40264a0

src/modules/util/common.h

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2020-2021. Uniontech Software Ltd. All rights reserved.
+ *
+ * Author:     Iceyer <me@iceyer.net>
+ *
+ * Maintainer: Iceyer <me@iceyer.net>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#ifndef LINGLONG_BOX_SRC_UTIL_COMMON_H_
+#define LINGLONG_BOX_SRC_UTIL_COMMON_H_
+
+#include <memory>
+#include <cstring>
+#include <cstdarg>
+
+#include <vector>
+#include <iostream>
+#include <iterator>
+
+namespace linglong {
+namespace util {
+
+typedef std::vector<std::string> str_vec;
+
+str_vec str_spilt(const std::string &s, const std::string &sep);
+
+std::string str_vec_join(const str_vec &vec, char sep);
+
+inline std::string format(const std::string fmt, ...)
+{
+    int n = ((int)fmt.size()) * 2;
+    std::unique_ptr<char[]> formatted;
+    va_list ap;
+    while (true) {
+        formatted.reset(new char[n]);
+        strcpy(&formatted[0], fmt.c_str());
+        va_start(ap, fmt);
+        int final_n = vsnprintf(&formatted[0], n, fmt.c_str(), ap);
+        va_end(ap);
+        if (final_n < 0 || final_n >= n)
+            n += abs(final_n - n + 1);
+        else
+            break;
+    }
+    return std::string {formatted.get()};
+}
+
+} // namespace util
+} // namespace linglong
+
+template<typename T>
+std::ostream &operator<<(std::ostream &out, const std::vector<T> &v)
+{
+    if (!v.empty()) {
+        out << '[';
+        std::copy(v.begin(), v.end(), std::ostream_iterator<T>(out, ", "));
+        out << "\b\b]";
+    }
+    return out;
+}
+
+#endif /* LINGLONG_BOX_SRC_UTIL_COMMON_H_ */