/*

 * Copyright (c) Meta Platforms, Inc. and affiliates.

 *

 * This source code is licensed under the MIT license found in the

 * LICENSE file in the root directory of this source tree.

 */

#include "hermes/Platform/Logging.h"

#ifdef __ANDROID__

#include <android/log.h>

#elif defined(__APPLE__)

#include <os/log.h>

#include <stdio.h>

#else

#include <cstdio>

#endif

#include <cstdarg>

#include <memory>

namespace hermes {

void hermesLog(const char *componentName, const char *fmt, ...) {

  va_list args;

  va_start(args, fmt);

#ifdef __ANDROID__

  __android_log_vprint(ANDROID_LOG_INFO, componentName, fmt, args);

#elif defined(__APPLE__)

  static os_log_t hermesLogger = os_log_create("dev.hermesengine", "Default");

  // Need to make a copy in order to do the vsprintf trick.

  va_list argsCopy;

  va_copy(argsCopy, args);

  int numChars = vsnprintf(nullptr, 0, fmt, argsCopy);

  va_end(argsCopy);

  std::unique_ptr<char[]> buffer{new char[numChars + 1]};

  int numCharsWritten = vsnprintf(buffer.get(), numChars + 1, fmt, args);

  (void)numCharsWritten;

  // Log all messages as public here. Hermes will never log private information.

  os_log_with_type(

      hermesLogger,

      OS_LOG_TYPE_INFO,

      "%{public}s: %{public}s",

      componentName,

      buffer.get());

#else

  fprintf(stderr, "%s: ", componentName);

  vfprintf(stderr, fmt, args);

  fprintf(stderr, "\n");

#endif

  va_end(args);

}

} // namespace hermes