[Project] Move C++ specific declarations to C++ header

src/libmime/received.hxx

@@ -0,0 +1,112 @@
+/*-
+ * Copyright 2021 Vsevolod Stakhov
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef RSPAMD_RECEIVED_HXX
+#define RSPAMD_RECEIVED_HXX
+#pragma once
+
+#include "config.h"
+#include "received.h"
+#include "mime_string.hxx"
+#include "libmime/email_addr.h"
+#include "libserver/task.h"
+#include <vector>
+#include <string_view>
+#include <utility>
+#include <optional>
+
+namespace rspamd::mime {
+
+static inline auto
+received_char_filter(UChar32 uc) -> UChar32
+{
+	if (u_isprint(uc)) {
+		return u_tolower(uc);
+	}
+
+	return 0;
+}
+
+struct received_header {
+	mime_string from_hostname;
+	std::string_view from_ip;
+	mime_string real_hostname;
+	mime_string real_ip;
+	mime_string by_hostname;
+	std::string_view for_mbox;
+	struct rspamd_email_address *for_addr = nullptr;
+	rspamd_inet_addr_t *addr = nullptr;
+	struct rspamd_mime_header *hdr = nullptr;
+	time_t timestamp = 0;
+	int flags = 0; /* See enum rspamd_received_type */
+
+	received_header() noexcept
+			: from_hostname(received_char_filter),
+			  real_hostname(received_char_filter),
+			  real_ip(received_char_filter),
+			  by_hostname(received_char_filter) {}
+
+	~received_header() {
+		if (for_addr) {
+			rspamd_email_address_free(for_addr);
+		}
+	}
+};
+
+class received_header_chain {
+public:
+	explicit received_header_chain(struct rspamd_task *_task) : task(_task) {
+		headers.reserve(2);
+		rspamd_mempool_add_destructor(task->task_pool,
+				received_header_chain::received_header_chain_pool_dtor, this);
+	}
+
+	enum class append_type {
+		append_tail,
+		append_head
+	};
+
+	auto new_received(append_type how = append_type::append_tail) -> received_header & {
+		if (how == append_type::append_tail) {
+			headers.emplace_back();
+
+			return headers.back();
+		}
+		else {
+			headers.insert(std::begin(headers), {});
+
+			return headers.front();
+		}
+	}
+	auto get_received(std::size_t nth) -> std::optional<std::reference_wrapper<received_header>>{
+		if (nth < headers.size()) {
+			return headers[nth];
+		}
+
+		return std::nullopt;
+	}
+private:
+	static auto received_header_chain_pool_dtor(void *ptr) -> void {
+		delete static_cast<received_header_chain *>(ptr);
+	}
+	std::vector<received_header> headers;
+	struct rspamd_task *task;
+};
+
+}
+
+#endif //RSPAMD_RECEIVED_HXX