From 99bf661661e46c6ca4ee71b955fb00f5b9baa130 Mon Sep 17 00:00:00 2001
From: Peter van Dijk <peter.van.dijk@powerdns.com>
Date: Tue, 2 Jul 2024 12:48:38 +0200
Subject: [PATCH] import views.hh from master

---
 pdns/Makefile.am           |  1 +
 pdns/dnsdistdist/views.hh  |  1 +
 pdns/recursordist/views.hh |  1 +
 pdns/views.hh              | 73 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 76 insertions(+)
 create mode 120000 pdns/dnsdistdist/views.hh
 create mode 120000 pdns/recursordist/views.hh
 create mode 100644 pdns/views.hh

diff --git a/pdns/Makefile.am b/pdns/Makefile.am
index 263bf3cd01..bee1d58ef0 100644
--- a/pdns/Makefile.am
+++ b/pdns/Makefile.am
@@ -287,6 +287,7 @@ pdns_server_SOURCES = \
 	utility.hh \
 	uuid-utils.hh uuid-utils.cc \
 	version.cc version.hh \
+	views.hh \
 	webserver.cc webserver.hh \
 	ws-api.cc ws-api.hh \
 	ws-auth.cc ws-auth.hh \
diff --git a/pdns/dnsdistdist/views.hh b/pdns/dnsdistdist/views.hh
new file mode 120000
index 0000000000..2213b7d900
--- /dev/null
+++ b/pdns/dnsdistdist/views.hh
@@ -0,0 +1 @@
+../views.hh
\ No newline at end of file
diff --git a/pdns/recursordist/views.hh b/pdns/recursordist/views.hh
new file mode 120000
index 0000000000..2213b7d900
--- /dev/null
+++ b/pdns/recursordist/views.hh
@@ -0,0 +1 @@
+../views.hh
\ No newline at end of file
diff --git a/pdns/views.hh b/pdns/views.hh
new file mode 100644
index 0000000000..b6be93019c
--- /dev/null
+++ b/pdns/views.hh
@@ -0,0 +1,73 @@
+/*
+ * This file is part of PowerDNS or dnsdist.
+ * Copyright -- PowerDNS.COM B.V. and its contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * In addition, for the avoidance of any doubt, permission is granted to
+ * link this program with OpenSSL and to (re)distribute the binaries
+ * produced as the result of such linking.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#pragma once
+
+#include <string_view>
+
+namespace pdns::views
+{
+
+class UnsignedCharView
+{
+public:
+  UnsignedCharView(const char* data_, size_t size_) :
+    view(data_, size_)
+  {
+  }
+  // NOLINTBEGIN(cppcoreguidelines-pro-type-reinterpret-cast): No unsigned char view in C++17
+  UnsignedCharView(const unsigned char* data_, size_t size_) :
+    view(reinterpret_cast<const char*>(data_), size_)
+  {
+  }
+  using size_type = std::string_view::size_type;
+
+  [[nodiscard]] const unsigned char& at(size_type pos) const
+  {
+    return reinterpret_cast<const unsigned char&>(view.at(pos));
+  }
+
+  [[nodiscard]] const unsigned char& operator[](size_type pos) const
+  {
+    return reinterpret_cast<const unsigned char&>(view[pos]);
+  }
+
+  [[nodiscard]] const unsigned char* data() const
+  {
+    return reinterpret_cast<const unsigned char*>(view.data());
+  }
+  // NOLINTEND(cppcoreguidelines-pro-type-reinterpret-cast): No unsigned char view in C++17
+
+  [[nodiscard]] size_t size() const
+  {
+    return view.size();
+  }
+
+  [[nodiscard]] size_t length() const
+  {
+    return view.length();
+  }
+
+private:
+  std::string_view view;
+};
+
+}
-- 
2.47.2