Rename our allwpilib (which is now 2020) to not have 2019 in the name
Change-Id: I3c07f85ed32ab8b97db765a9b43f2a6ce7da964a
diff --git a/wpiutil/src/main/native/cpp/hostname.cpp b/wpiutil/src/main/native/cpp/hostname.cpp
new file mode 100644
index 0000000..ffc5cad
--- /dev/null
+++ b/wpiutil/src/main/native/cpp/hostname.cpp
@@ -0,0 +1,56 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2017-2018 FIRST. 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 "wpi/hostname.h"
+
+#include <cstdlib>
+#include <string>
+
+#include "uv.h"
+#include "wpi/SmallVector.h"
+#include "wpi/StringRef.h"
+
+namespace wpi {
+
+std::string GetHostname() {
+ std::string rv;
+ char name[256];
+ size_t size = sizeof(name);
+
+ int err = uv_os_gethostname(name, &size);
+ if (err == 0) {
+ rv.assign(name, size);
+ } else if (err == UV_ENOBUFS) {
+ char* name2 = static_cast<char*>(std::malloc(size));
+ err = uv_os_gethostname(name2, &size);
+ if (err == 0) rv.assign(name2, size);
+ std::free(name2);
+ }
+
+ return rv;
+}
+
+StringRef GetHostname(SmallVectorImpl<char>& name) {
+ // Use a tmp array to not require the SmallVector to be too large.
+ char tmpName[256];
+ size_t size = sizeof(tmpName);
+
+ name.clear();
+
+ int err = uv_os_gethostname(tmpName, &size);
+ if (err == 0) {
+ name.append(tmpName, tmpName + size);
+ } else if (err == UV_ENOBUFS) {
+ name.resize(size);
+ err = uv_os_gethostname(name.data(), &size);
+ if (err != 0) size = 0;
+ }
+
+ return StringRef{name.data(), size};
+}
+
+} // namespace wpi