/*
 * rt_nonfinite.c
 *
 * Academic License - for use in teaching, academic research, and meeting
 * course requirements at degree granting institutions only.  Not for
 * government, commercial, or other organizational use.
 *
 * Code generation for model "helicopter".
 *
 * Model version              : 11.4
 * Simulink Coder version : 9.4 (R2020b) 29-Jul-2020
 * C source code generated on : Thu Feb  6 10:16:24 2025
 *
 * Target selection: quarc_win64.tlc
 * Note: GRT includes extra infrastructure and instrumentation for prototyping
 * Embedded hardware selection: 32-bit Generic
 * Code generation objectives: Unspecified
 * Validation result: Not run
 */

/*
 * Abstract:
 *      Function to initialize non-finites,
 *      (Inf, NaN and -Inf).
 */
#include "rt_nonfinite.h"
#include "rtGetNaN.h"
#include "rtGetInf.h"
#define NumBitsPerChar                 8U

real_T rtInf;
real_T rtMinusInf;
real_T rtNaN;
real32_T rtInfF;
real32_T rtMinusInfF;
real32_T rtNaNF;

/*
 * Initialize the rtInf, rtMinusInf, and rtNaN needed by the
 * generated code. NaN is initialized as non-signaling. Assumes IEEE.
 */
void rt_InitInfAndNaN(size_t realSize)
{
  (void) (realSize);
  rtNaN = rtGetNaN();
  rtNaNF = rtGetNaNF();
  rtInf = rtGetInf();
  rtInfF = rtGetInfF();
  rtMinusInf = rtGetMinusInf();
  rtMinusInfF = rtGetMinusInfF();
}

/* Test if value is infinite */
boolean_T rtIsInf(real_T value)
{
  return (boolean_T)((value==rtInf || value==rtMinusInf) ? 1U : 0U);
}

/* Test if single-precision value is infinite */
boolean_T rtIsInfF(real32_T value)
{
  return (boolean_T)(((value)==rtInfF || (value)==rtMinusInfF) ? 1U : 0U);
}

/* Test if value is not a number */
boolean_T rtIsNaN(real_T value)
{
  boolean_T result = (boolean_T) 0;
  size_t bitsPerReal = sizeof(real_T) * (NumBitsPerChar);
  if (bitsPerReal == 32U) {
    result = rtIsNaNF((real32_T)value);
  } else {
    uint16_T one = 1U;
    enum {
      LittleEndian,
      BigEndian
    } machByteOrder = (*((uint8_T *) &one) == 1U) ? LittleEndian : BigEndian;
    switch (machByteOrder) {
     case LittleEndian:
      {
        union {
          LittleEndianIEEEDouble bitVal;
          real_T fltVal;
        } tmpVal;

        tmpVal.fltVal = value;
        result = (boolean_T)((tmpVal.bitVal.words.wordH & 0x7FF00000) ==
                             0x7FF00000 &&
                             ( (tmpVal.bitVal.words.wordH & 0x000FFFFF) != 0 ||
                              (tmpVal.bitVal.words.wordL != 0) ));
        break;
      }

     case BigEndian:
      {
        union {
          BigEndianIEEEDouble bitVal;
          real_T fltVal;
        } tmpVal;

        tmpVal.fltVal = value;
        result = (boolean_T)((tmpVal.bitVal.words.wordH & 0x7FF00000) ==
                             0x7FF00000 &&
                             ( (tmpVal.bitVal.words.wordH & 0x000FFFFF) != 0 ||
                              (tmpVal.bitVal.words.wordL != 0) ));
        break;
      }
    }
  }

  return result;
}

/* Test if single-precision value is not a number */
boolean_T rtIsNaNF(real32_T value)
{
  IEEESingle tmp;
  tmp.wordL.wordLreal = value;
  return (boolean_T)( (tmp.wordL.wordLuint & 0x7F800000) == 0x7F800000 &&
                     (tmp.wordL.wordLuint & 0x007FFFFF) != 0 );
}
