cscore: Separate platform-specific sources (#1387)

cscore/src/main/native/linux/UsbUtil.h

@@ -0,0 +1,31 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) 2016-2018 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.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#ifndef CSCORE_USBUTIL_H_
+#define CSCORE_USBUTIL_H_
+
+#include <stdint.h>
+
+#include <wpi/SmallVector.h>
+#include <wpi/StringRef.h>
+
+namespace cs {
+
+wpi::StringRef GetUsbNameFromId(int vendor, int product,
+                                wpi::SmallVectorImpl<char>& buf);
+
+int CheckedIoctl(int fd, unsigned long req, void* data,  // NOLINT(runtime/int)
+                 const char* name, const char* file, int line, bool quiet);
+
+#define DoIoctl(fd, req, data) \
+  CheckedIoctl(fd, req, data, #req, __FILE__, __LINE__, false)
+#define TryIoctl(fd, req, data) \
+  CheckedIoctl(fd, req, data, #req, __FILE__, __LINE__, true)
+
+}  // namespace cs
+
+#endif  // CSCORE_USBUTIL_H_