WPILib Reorganization

This is a major restructuring of the WPILib repository to simply build
procedures and remove the remnants of Maven from everything except the
eclipse plugins. Gradle files have been largely simplified or rewritten,
taking advantage of splitting up parts of the build into separate build
files for ease of reading.

The eclipse plugins are now in a separate project, as is ntcore. All
dependencies are resolved via Maven dependencies, with the
Jenkins-maintained WPILib repo. Project structures have also been
simplified: we no longer have separate subprojects inside wpilibc and
wpilibj. Where possible, these changes hav been done with git renames,
to make sure we still have full history for all repositories. Other
unrelated subprojects have also been broken out: OutlineViewer is now a
separate project.

Change-Id: Ib4e2a6e1a2f66427a14f16612b0e0d69ed661878

wpilibj/src/athena/cpp/lib/HALUtil.h

@@ -0,0 +1,28 @@
+#ifndef HALUTIL_H
+#define HALUTIL_H
+
+#include <stdint.h>
+
+#include <jni.h>
+
+extern JavaVM *jvm;
+
+void ReportError(JNIEnv *env, int32_t status, bool do_throw = true);
+
+inline bool CheckStatus(JNIEnv *env, int32_t status, bool do_throw = true) {
+  if (status != 0) ReportError(env, status, do_throw);
+  return status == 0;
+}
+
+void ReportCANError(JNIEnv *env, int32_t status, int message_id);
+
+inline bool CheckCANStatus(JNIEnv *env, int32_t status, int message_id) {
+  if (status != 0) ReportCANError(env, status, message_id);
+  return status == 0;
+}
+
+void ThrowIllegalArgumentException(JNIEnv *env, const char *msg);
+void ThrowBoundaryException(JNIEnv *env, double value, double lower,
+                            double upper);
+
+#endif  // HALUTIL_H