Prepare ntcore for merge into allwpilib.

ntcore/manualTests/native/client.cpp

@@ -0,0 +1,40 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2017-2018. All Rights Reserved.                        */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include <chrono>
+#include <climits>
+#include <cstdio>
+#include <thread>
+
+#include "ntcore.h"
+
+int main() {
+  auto inst = nt::GetDefaultInstance();
+  nt::AddLogger(inst,
+                [](const nt::LogMessage& msg) {
+                  std::fputs(msg.message.c_str(), stderr);
+                  std::fputc('\n', stderr);
+                },
+                0, UINT_MAX);
+  nt::StartClient(inst, "127.0.0.1", 10000);
+  std::this_thread::sleep_for(std::chrono::seconds(2));
+
+  auto foo = nt::GetEntry(inst, "/foo");
+  auto foo_val = nt::GetEntryValue(foo);
+  if (foo_val && foo_val->IsDouble())
+    std::printf("Got foo: %g\n", foo_val->GetDouble());
+
+  auto bar = nt::GetEntry(inst, "/bar");
+  nt::SetEntryValue(bar, nt::Value::MakeBoolean(false));
+  nt::SetEntryFlags(bar, NT_PERSISTENT);
+
+  auto bar2 = nt::GetEntry(inst, "/bar2");
+  nt::SetEntryValue(bar2, nt::Value::MakeBoolean(true));
+  nt::SetEntryValue(bar2, nt::Value::MakeBoolean(false));
+  nt::SetEntryValue(bar2, nt::Value::MakeBoolean(true));
+  std::this_thread::sleep_for(std::chrono::seconds(10));
+}