/*
 *************************************************************************
 *
 *                   "DHRYSTONE" Benchmark Program
 *                   -----------------------------
 *
 *  Version:    C, Version 2.1
 *
 *  File:       dhry_1.c (part 2 of 3)
 *
 *  Date:       May 25, 1988
 *
 *  Author:     Reinhold P. Weicker
 *
 *************************************************************************
 */

#include <stdio.h>
#include <windows.h>
#include <time.h>

#include "dhry.h"

/* Global Variables: */

Rec_Pointer     Ptr_Glob,
                Next_Ptr_Glob;
int             Int_Glob;
Boolean         Bool_Glob;
char            Ch_1_Glob,
                Ch_2_Glob;
int             Arr_1_Glob [50];
int             Arr_2_Glob [50] [50];
double 	secs;
LARGE_INTEGER starttime;


char Reg_Define[] = "Register option selected.";

extern char     *malloc ();
Enumeration     Func_1 ();
  /* 
  forward declaration necessary since Enumeration may not simply be int
  */

#ifndef ROPT
#define REG
        /* REG becomes defined as empty */
        /* i.e. no register variables   */
#else
#define REG register
#endif


/* variables for time measurement: */

#define Too_Small_Time 2
                /* Measurements should last at least 2 seconds */

double          Begin_Time,
                End_Time,
                User_Time;

double          Microseconds,
                Dhrystones_Per_Second,
                Vax_Mips;

/* end of variables for time measurement */


void DoDhrystoneTest(const int iLoops)
/*****/

  /* main program, corresponds to procedures        */
  /* Main and Proc_0 in the Ada version             */
{
  double   dtime();

        One_Fifty       Int_1_Loc;
  REG   One_Fifty       Int_2_Loc;
        One_Fifty       Int_3_Loc;
  REG   char            Ch_Index;
        Enumeration     Enum_Loc;
        Str_30          Str_1_Loc;
        Str_30          Str_2_Loc;
  REG   int             Run_Index;
  REG   int             Number_Of_Runs;


  /* Initializations */


  Next_Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));
  Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));

  Ptr_Glob->Ptr_Comp                    = Next_Ptr_Glob;
  Ptr_Glob->Discr                       = Ident_1;
  Ptr_Glob->variant.var_1.Enum_Comp     = Ident_3;
  Ptr_Glob->variant.var_1.Int_Comp      = 40;
  strcpy (Ptr_Glob->variant.var_1.Str_Comp,
		  "DHRYSTONE PROGRAM, SOME STRING");
  strcpy (Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");

  Arr_2_Glob [8][7] = 10;
		/* Was missing in published program. Without this statement,    */
		/* Arr_2_Glob [8][7] would have an undefined value.             */
		/* Warning: With 16-Bit processors and Number_Of_Runs > 32000,  */
		/* overflow may occur for this array element.                   */



  for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index)
  {

	Proc_5();
	Proc_4();
	  /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */
	Int_1_Loc = 2;
	Int_2_Loc = 3;
	strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
	Enum_Loc = Ident_2;
	Bool_Glob = ! Func_2 (Str_1_Loc, Str_2_Loc);
	  /* Bool_Glob == 1 */
	while (Int_1_Loc < Int_2_Loc)  /* loop body executed once */
	{
	  Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc;
		/* Int_3_Loc == 7 */
	  Proc_7 (Int_1_Loc, Int_2_Loc, &Int_3_Loc);
		/* Int_3_Loc == 7 */
	  Int_1_Loc += 1;
	} /* while */
	  /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
	Proc_8 (Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc);
	  /* Int_Glob == 5 */
	Proc_1 (Ptr_Glob);
	for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index)
							 /* loop body executed twice */
	{
	  if (Enum_Loc == Func_1 (Ch_Index, 'C'))
		  /* then, not executed */
		{
		Proc_6 (Ident_1, &Enum_Loc);
		strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING");
		Int_2_Loc = Run_Index;
		Int_Glob = Run_Index;
		}
	}
	  /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
	Int_2_Loc = Int_2_Loc * Int_1_Loc;
	Int_1_Loc = Int_2_Loc / Int_3_Loc;
	Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc;
	  /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */
	Proc_2 (&Int_1_Loc);
	  /* Int_1_Loc == 5 */

  } /* loop "for Run_Index" */
}


Proc_1 (Ptr_Val_Par)
/******************/

REG Rec_Pointer Ptr_Val_Par;
    /* executed once */
{
  REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;  
                                        /* == Ptr_Glob_Next */
  /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
  /* corresponds to "rename" in Ada, "with" in Pascal           */
  
  structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob);
  Ptr_Val_Par->variant.var_1.Int_Comp = 5;
  Next_Record->variant.var_1.Int_Comp 
        = Ptr_Val_Par->variant.var_1.Int_Comp;
  Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
  Proc_3 (&Next_Record->Ptr_Comp);
    /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp 
                        == Ptr_Glob->Ptr_Comp */
  if (Next_Record->Discr == Ident_1)
    /* then, executed */
  {
    Next_Record->variant.var_1.Int_Comp = 6;
    Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp, 
           &Next_Record->variant.var_1.Enum_Comp);
    Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
    Proc_7 (Next_Record->variant.var_1.Int_Comp, 10, 
           &Next_Record->variant.var_1.Int_Comp);
  }
  else /* not executed */
    structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);
} /* Proc_1 */


Proc_2 (Int_Par_Ref)
/******************/
    /* executed once */
    /* *Int_Par_Ref == 1, becomes 4 */

One_Fifty   *Int_Par_Ref;
{
  One_Fifty  Int_Loc;
  Enumeration   Enum_Loc;

  Int_Loc = *Int_Par_Ref + 10;
  do /* executed once */
    if (Ch_1_Glob == 'A')
      /* then, executed */
    {
      Int_Loc -= 1;
      *Int_Par_Ref = Int_Loc - Int_Glob;
      Enum_Loc = Ident_1;
    } /* if */
  while (Enum_Loc != Ident_1); /* true */
} /* Proc_2 */


Proc_3 (Ptr_Ref_Par)
/******************/
    /* executed once */
    /* Ptr_Ref_Par becomes Ptr_Glob */

Rec_Pointer *Ptr_Ref_Par;

{
  if (Ptr_Glob != Null)
    /* then, executed */
    *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
  Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
} /* Proc_3 */


Proc_4 () /* without parameters */
/*******/
    /* executed once */
{
  Boolean Bool_Loc;

  Bool_Loc = Ch_1_Glob == 'A';
  Bool_Glob = Bool_Loc | Bool_Glob;
  Ch_2_Glob = 'B';
} /* Proc_4 */


Proc_5 () /* without parameters */
/*******/
    /* executed once */
{
  Ch_1_Glob = 'A';
  Bool_Glob = false;
} /* Proc_5 */


void start_time()
{
    QueryPerformanceCounter(&starttime);
}

double end_time()
{
    LARGE_INTEGER liDiff;
    LARGE_INTEGER liFreq;

    QueryPerformanceCounter(&liDiff);

    liDiff.QuadPart -= starttime.QuadPart;

    (void)QueryPerformanceFrequency(&liFreq);

    secs = (double)liDiff.QuadPart / (double) liFreq.QuadPart;
    return secs;
}

        /* Procedure for the assignment of structures,          */
        /* if the C compiler doesn't support this feature       */
#ifdef  NOSTRUCTASSIGN
memcpy (d, s, l)
register char   *d;
register char   *s;
register int    l;
{
        while (l--) *d++ = *s++;
}
#endif
