1 files changed, 45 insertions, 0 deletions
diff --git a/src/lib/util/dhcp_space.h b/src/lib/util/dhcp_space.h
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+++ b/src/lib/util/dhcp_space.h
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+// Copyright (C) 2022 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef ISC_UTIL_DHCP_SPACE_H
+#define ISC_UTIL_DHCP_SPACE_H 1
+
+#include <string>
+
+#include <boost/algorithm/string/replace.hpp>
+
+namespace isc {
+namespace util {
+
+enum DhcpSpace {
+    DHCPv4,
+    DHCPv6,
+};
+
+/// @brief Provides the C string representation of the DHCP space.
+///
+/// @tparam D DHCP space
+///
+/// @return "4" or "6"
+template <DhcpSpace D>
+char const* cStringDhcpSpace();
+
+/// @brief Replaces all occurrences of {} with 4 or 6 based on the templated DHCP space.
+///
+/// @tparam D DHCP space
+///
+/// @return the formatted string
+template <DhcpSpace D>
+std::string formatDhcpSpace(char const* const format_string) {
+    std::string result(format_string);
+    boost::replace_all(result, "{}", cStringDhcpSpace<D>());
+    return result;
+}
+
+}  // namespace util
+}  // namespace isc
+
+#endif  // ISC_UTIL_DHCP_SPACE_H