/////////////////////////////////////////////////////////////////////////////// 
// Copyright (C) 2002-2025, Open Design Alliance (the "Alliance"). 
// All rights reserved. 
// 
// This software and its documentation and related materials are owned by 
// the Alliance. The software may only be incorporated into application 
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// programs incorporating this software must include the following statement 
// with their copyright notices:
//   
//   This application incorporates Open Design Alliance software pursuant to a license 
//   agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2025 by Open Design Alliance. 
//   All rights reserved.
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// By use of this software, its documentation or related materials, you 
// acknowledge and accept the above terms.
///////////////////////////////////////////////////////////////////////////////


#ifndef TNW_FILE_OPTIONS_UTILS_H_
#define TNW_FILE_OPTIONS_UTILS_H_

#include "OdPlatformSettings.h"
#define STL_USING_LIMITS
#include "OdaSTL.h"

/** \details
  Utils of file options using.

  <group TNW_Namespaces>
*/
namespace NwFileOptionsUtils
{
  //DOM-IGNORE-BEGIN
  constexpr double pow10_recursive(int e, double value = 1.0)
  {
    return e == 0 ? value :
      (e > 0 ? pow10_recursive(e - 1, value * 10.0) :
        pow10_recursive(e + 1, value / 10.0));
  }

  constexpr double pow10(int e)
  {
    if (e >= -15 && e <= 15)
      return pow10_recursive(e);

    double result = 1.0;
    double base = 10.0;
    int abs_e = e < 0 ? -e : e;

    while (abs_e) {
      if (abs_e & 1)
        result *= base;
      base *= base;
      abs_e >>= 1;
    }

    return e < 0 ? 1.0 / result : result;
  }
  //DOM-IGNORE-END

  /** \details
    Converts the frame rate to time.

    \param frameRate  [in] The number of frames per second.

    \returns An OdInt64 value representing the frame processing time.

    \remarks
      By default, the time is returned in seconds. However, it is possible to set the exp value to convert the result into milliseconds, microseconds, nanoseconds, or other units.
  */
  template <OdInt32 exp = 0, OdUInt32 coef = 1>
  constexpr OdInt64 getTimeByFrameRate(double frameRate)
  {
    double time = (1. / frameRate) * pow10(exp) * coef;

    if (time > std::numeric_limits<double>::max()) return std::numeric_limits<OdInt64>::max();
    if (time < std::numeric_limits<double>::min()) return std::numeric_limits<OdInt64>::min();

    return static_cast<OdInt64>(std::round(time));
  }
}

#endif  // TNW_FILE_OPTIONS_UTILS_H_