io.h

// Copyright 2019 Google LLC. All Rights Reserved.
//
// 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
//
//     https://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 IO_H_
#define IO_H_

#include <cstdarg>
#include <cstdio>

namespace qsim {

namespace output {
  static bool enabled = true;
}

/**
 * Controller for output logs.
 */
struct IO {
  static void errorf(const char* format, ...) {
    if (!output::enabled) {
      return;
    }

    va_list args;
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);
  }

  static void messagef(const char* format, ...) {
    if (!output::enabled) {
      return;
    }

    va_list args;
    va_start(args, format);
    vprintf(format, args);
    va_end(args);
  }
};

}  // namespace qsim

#endif  // IO_H_