[wpinet] Move network portions of wpiutil into new wpinet library (#4077)

wpinet/src/main/native/cpp/uv/GetNameInfo.cpp

@@ -0,0 +1,94 @@
+// 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.
+
+#include "wpinet/uv/GetNameInfo.h"
+
+#include "wpinet/uv/Loop.h"
+#include "wpinet/uv/util.h"
+
+namespace wpi::uv {
+
+GetNameInfoReq::GetNameInfoReq() {
+  error = [this](Error err) { GetLoop().error(err); };
+}
+
+void GetNameInfo(Loop& loop, const std::shared_ptr<GetNameInfoReq>& req,
+                 const sockaddr& addr, int flags) {
+  int err = uv_getnameinfo(
+      loop.GetRaw(), req->GetRaw(),
+      [](uv_getnameinfo_t* req, int status, const char* hostname,
+         const char* service) {
+        auto& h = *static_cast<GetNameInfoReq*>(req->data);
+        if (status < 0) {
+          h.ReportError(status);
+        } else {
+          h.resolved(hostname, service);
+        }
+        h.Release();  // this is always a one-shot
+      },
+      &addr, flags);
+  if (err < 0) {
+    loop.ReportError(err);
+  } else {
+    req->Keep();
+  }
+}
+
+void GetNameInfo(Loop& loop,
+                 std::function<void(const char*, const char*)> callback,
+                 const sockaddr& addr, int flags) {
+  auto req = std::make_shared<GetNameInfoReq>();
+  req->resolved.connect(std::move(callback));
+  GetNameInfo(loop, req, addr, flags);
+}
+
+void GetNameInfo4(Loop& loop, const std::shared_ptr<GetNameInfoReq>& req,
+                  std::string_view ip, unsigned int port, int flags) {
+  sockaddr_in addr;
+  int err = NameToAddr(ip, port, &addr);
+  if (err < 0) {
+    loop.ReportError(err);
+  } else {
+    GetNameInfo(loop, req, reinterpret_cast<const sockaddr&>(addr), flags);
+  }
+}
+
+void GetNameInfo4(Loop& loop,
+                  std::function<void(const char*, const char*)> callback,
+                  std::string_view ip, unsigned int port, int flags) {
+  sockaddr_in addr;
+  int err = NameToAddr(ip, port, &addr);
+  if (err < 0) {
+    loop.ReportError(err);
+  } else {
+    GetNameInfo(loop, std::move(callback),
+                reinterpret_cast<const sockaddr&>(addr), flags);
+  }
+}
+
+void GetNameInfo6(Loop& loop, const std::shared_ptr<GetNameInfoReq>& req,
+                  std::string_view ip, unsigned int port, int flags) {
+  sockaddr_in6 addr;
+  int err = NameToAddr(ip, port, &addr);
+  if (err < 0) {
+    loop.ReportError(err);
+  } else {
+    GetNameInfo(loop, req, reinterpret_cast<const sockaddr&>(addr), flags);
+  }
+}
+
+void GetNameInfo6(Loop& loop,
+                  std::function<void(const char*, const char*)> callback,
+                  std::string_view ip, unsigned int port, int flags) {
+  sockaddr_in6 addr;
+  int err = NameToAddr(ip, port, &addr);
+  if (err < 0) {
+    loop.ReportError(err);
+  } else {
+    GetNameInfo(loop, std::move(callback),
+                reinterpret_cast<const sockaddr&>(addr), flags);
+  }
+}
+
+}  // namespace wpi::uv