/*
 * Copyright 2011-2014 Blender Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __UTIL_LOGGING_H__
#define __UTIL_LOGGING_H__

#if defined(WITH_CYCLES_LOGGING) && !defined(__KERNEL_GPU__)
#  include <gflags/gflags.h>
#  include <glog/logging.h>
#endif

#include <iostream>

CCL_NAMESPACE_BEGIN

#if !defined(WITH_CYCLES_LOGGING) || defined(__KERNEL_GPU__)
class StubStream {
 public:
  template<class T> StubStream &operator<<(const T &)
  {
    return *this;
  }
};

class LogMessageVoidify {
 public:
  LogMessageVoidify()
  {
  }
  void operator&(const StubStream &)
  {
  }
};

#  define LOG_SUPPRESS() (true) ? ((void)0) : LogMessageVoidify() & StubStream()
#  define LOG(severity) LOG_SUPPRESS()
#  define VLOG(severity) LOG_SUPPRESS()
#  define VLOG_IF(severity, condition) LOG_SUPPRESS()
#  define VLOG_IS_ON(severity) false

#  define CHECK(expression) LOG_SUPPRESS()

#  define CHECK_NOTNULL(expression) LOG_SUPPRESS()
#  define CHECK_NULL(expression) LOG_SUPPRESS()

#  define CHECK_NEAR(actual, expected, eps) LOG_SUPPRESS()

#  define CHECK_GE(a, b) LOG_SUPPRESS()
#  define CHECK_NE(a, b) LOG_SUPPRESS()
#  define CHECK_EQ(a, b) LOG_SUPPRESS()
#  define CHECK_GT(a, b) LOG_SUPPRESS()
#  define CHECK_LT(a, b) LOG_SUPPRESS()
#  define CHECK_LE(a, b) LOG_SUPPRESS()

#  define DCHECK(expression) LOG_SUPPRESS()

#  define DCHECK_NOTNULL(expression) LOG_SUPPRESS()
#  define DCHECK_NULL(expression) LOG_SUPPRESS()

#  define DCHECK_NEAR(actual, expected, eps) LOG_SUPPRESS()

#  define DCHECK_GE(a, b) LOG_SUPPRESS()
#  define DCHECK_NE(a, b) LOG_SUPPRESS()
#  define DCHECK_EQ(a, b) LOG_SUPPRESS()
#  define DCHECK_GT(a, b) LOG_SUPPRESS()
#  define DCHECK_LT(a, b) LOG_SUPPRESS()
#  define DCHECK_LE(a, b) LOG_SUPPRESS()

#  define LOG_ASSERT(expression) LOG_SUPPRESS()
#endif

#define VLOG_ONCE(level, flag) \
  if (!flag) \
  flag = true, VLOG(level)

struct int2;
struct float3;

void util_logging_init(const char *argv0);
void util_logging_start();
void util_logging_verbosity_set(int verbosity);

std::ostream &operator<<(std::ostream &os, const int2 &value);
std::ostream &operator<<(std::ostream &os, const float3 &value);

CCL_NAMESPACE_END

#endif /* __UTIL_LOGGING_H__ */