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wpinet/src/main/native/include/wpi/net/uv/GetAddrInfo.hpp

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+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#ifndef WPINET_UV_GETADDRINFO_H_
+#define WPINET_UV_GETADDRINFO_H_
+
+#include <uv.h>
+
+#include <functional>
+#include <memory>
+#include <optional>
+#include <string_view>
+#include <utility>
+
+#include <wpi/Signal.h>
+
+#include "wpinet/uv/Request.h"
+
+namespace wpi::uv {
+
+class Loop;
+
+/**
+ * GetAddrInfo request.
+ * For use with `GetAddrInfo()` function family.
+ */
+class GetAddrInfoReq : public RequestImpl<GetAddrInfoReq, uv_getaddrinfo_t> {
+ public:
+  GetAddrInfoReq();
+
+  Loop& GetLoop() const { return *static_cast<Loop*>(GetRaw()->loop->data); }
+
+  /**
+   * Resolved lookup signal.
+   * Parameter is resolved address info.
+   */
+  sig::Signal<const addrinfo&> resolved;
+};
+
+/**
+ * Asynchronous getaddrinfo(3).  HandleResolvedAddress() is called on the
+ * request when the resolution completes.  HandleError() is called on the
+ * request if any errors occur.
+ *
+ * Either node or service may be empty but not both.
+ *
+ * @param loop Event loop
+ * @param req request
+ * @param node Either a numerical network address or a network hostname.
+ * @param service Either a service name or a port number as a string.
+ * @param hints Optional `addrinfo` data structure with additional address
+ *              type constraints.
+ */
+void GetAddrInfo(Loop& loop, const std::shared_ptr<GetAddrInfoReq>& req,
+                 std::string_view node, std::string_view service = {},
+                 std::optional<addrinfo> hints = {});
+
+/**
+ * Asynchronous getaddrinfo(3).  HandleResolvedAddress() is called on the
+ * request when the resolution completes.  HandleError() is called on the
+ * request if any errors occur.
+ *
+ * Either node or service may be empty but not both.
+ *
+ * @param loop Event loop
+ * @param req request
+ * @param node Either a numerical network address or a network hostname.
+ * @param service Either a service name or a port number as a string.
+ * @param hints Optional `addrinfo` data structure with additional address
+ *              type constraints.
+ */
+inline void GetAddrInfo(const std::shared_ptr<Loop>& loop,
+                        const std::shared_ptr<GetAddrInfoReq>& req,
+                        std::string_view node, std::string_view service = {},
+                        std::optional<addrinfo> hints = {}) {
+  GetAddrInfo(*loop, req, node, service, hints);
+}
+
+/**
+ * Asynchronous getaddrinfo(3).  The callback is called when the resolution
+ * completes, and errors are forwarded to the loop.  This is a convenience
+ * wrapper.
+ *
+ * Either node or service may be empty but not both.
+ *
+ * @param loop Event loop
+ * @param callback Callback function to call when resolution completes
+ * @param node Either a numerical network address or a network hostname.
+ * @param service Either a service name or a port number as a string.
+ * @param hints Optional `addrinfo` data structure with additional address
+ *              type constraints.
+ */
+void GetAddrInfo(Loop& loop, std::function<void(const addrinfo&)> callback,
+                 std::string_view node, std::string_view service = {},
+                 std::optional<addrinfo> hints = {});
+
+/**
+ * Asynchronous getaddrinfo(3).  The callback is called when the resolution
+ * completes, and errors are forwarded to the loop.  This is a convenience
+ * wrapper.
+ *
+ * Either node or service may be empty but not both.
+ *
+ * @param loop Event loop
+ * @param callback Callback function to call when resolution completes
+ * @param node Either a numerical network address or a network hostname.
+ * @param service Either a service name or a port number as a string.
+ * @param hints Optional `addrinfo` data structure with additional address
+ *              type constraints.
+ */
+inline void GetAddrInfo(const std::shared_ptr<Loop>& loop,
+                        std::function<void(const addrinfo&)> callback,
+                        std::string_view node, std::string_view service = {},
+                        std::optional<addrinfo> hints = {}) {
+  GetAddrInfo(*loop, std::move(callback), node, service, hints);
+}
+
+}  // namespace wpi::uv
+
+#endif  // WPINET_UV_GETADDRINFO_H_