Add logging implementation.

src/Log.cpp

@@ -0,0 +1,66 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2016. 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 "Log.h"
+
+#include <cstdio>
+#ifdef _WIN32
+ #include <cstdlib>
+#else
+ #include <cstring>
+#endif
+
+#ifdef __APPLE__
+ #include <libgen.h>
+#endif
+
+#ifdef __ANDROID__
+ #include <libgen.h>
+#endif
+
+using namespace cs;
+
+ATOMIC_STATIC_INIT(Logger)
+
+static void def_log_func(unsigned int level, const char* file,
+                         unsigned int line, const char* msg) {
+  if (level == 20) {
+    std::fprintf(stderr, "CS: %s\n", msg);
+    return;
+  }
+
+  const char* levelmsg;
+  if (level >= 50)
+    levelmsg = "CRITICAL";
+  else if (level >= 40)
+    levelmsg = "ERROR";
+  else if (level >= 30)
+    levelmsg = "WARNING";
+  else
+    return;
+#ifdef _WIN32
+  char fname[60];
+  char ext[10];
+  _splitpath_s(file, nullptr, 0, nullptr, 0, fname, 60, ext, 10);
+  std::fprintf(stderr, "CS: %s: %s (%s%s:%d)\n", levelmsg, msg, fname, ext,
+               line);
+#elif __APPLE__
+  int len = strlen(msg) + 1;
+  char* basestr = new char[len + 1];
+  strncpy(basestr, file, len);
+  std::fprintf(stderr, "CS: %s: %s (%s:%d)\n", levelmsg, msg, basename(basestr),
+               line);
+  delete[] basestr;
+#else
+  std::fprintf(stderr, "CS: %s: %s (%s:%d)\n", levelmsg, msg, basename(file),
+               line);
+#endif
+}
+
+Logger::Logger() { SetLogger(def_log_func); }
+
+Logger::~Logger() {}

src/Log.h

@@ -0,0 +1,49 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2016. 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 CAMERASERVER_LOG_H_
+#define CAMERASERVER_LOG_H_
+
+#include <functional>
+#include <sstream>
+#include <string>
+
+#include "support/atomic_static.h"
+#include "support/Logger.h"
+
+namespace cs {
+
+class Logger : public wpi::Logger {
+ public:
+  static Logger& GetInstance() {
+    ATOMIC_STATIC(Logger, instance);
+    return instance;
+  }
+  ~Logger();
+
+ private:
+  Logger();
+
+  ATOMIC_STATIC_DECL(Logger)
+};
+
+#define LOG(level, x) WPI_LOG(cs::Logger::GetInstance(), level, x)
+
+#undef ERROR
+#define ERROR(x) WPI_ERROR(cs::Logger::GetInstance(), x)
+#define WARNING(x) WPI_WARNING(cs::Logger::GetInstance(), x)
+#define INFO(x) WPI_INFO(cs::Logger::GetInstance(), x)
+
+#define DEBUG(x) WPI_DEBUG(cs::Logger::GetInstance(), x)
+#define DEBUG1(x) WPI_DEBUG1(cs::Logger::GetInstance(), x)
+#define DEBUG2(x) WPI_DEBUG2(cs::Logger::GetInstance(), x)
+#define DEBUG3(x) WPI_DEBUG3(cs::Logger::GetInstance(), x)
+#define DEBUG4(x) WPI_DEBUG4(cs::Logger::GetInstance(), x)
+
+} // namespace cs
+
+#endif  // CAMERASERVER_LOG_H_