/*
* Copyright (C) 2001-2009, CompHEP Collaboration
* Copyright (C) 1997, Alexander Pukhov 
* ------------------------------------------------
*/
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>

#include "service2/include/chep_limits.h"
#include "service2/include/files.h"
#include "service2/include/tptcmac.h"
#include "service2/include/parser.h"
#include "service2/include/read_func.h"
#include "service2/include/syst.h"
#include "chep_crt/include/chep_crt.h"

#include "out_ext.h"

#include "kinaux.h"
#include "phys_val.h"
#include "rd_num.h"
#include "regul.h"

table regTab =
{"*** Table ***", " Regularization ",
 " Momentum    |> Mass  <|> Width <| Power|", NULL};

invreg_ invreg_1[200] = {{{0}, 0., 0., 0, 0}};

static void 
inireg_ (void)
{
  invreg_1[0].lvinvr[0] = 0;
}

static int 
addreg_ (char *lv, double rgmasw, double rgwdtw, int nndeg)
{
  int nreg = 0;
  int lastrg = -1;

  for (; invreg_1[nreg].lvinvr[0]; nreg++)
    {
      if (eqvect_ (lv, invreg_1[nreg].lvinvr))
        lastrg = nreg;
    }
  if (nreg >= 199)
    return 0;
  strcpy (invreg_1[nreg].lvinvr, lv);
  invreg_1[nreg].rgmass = rgmasw;
  invreg_1[nreg].rgwdth = rgwdtw;
  invreg_1[nreg].ndeg = nndeg;
  invreg_1[nreg].nextrg = 0;
  if (lastrg >= 0)
    invreg_1[lastrg].nextrg = nreg + 1;
  invreg_1[nreg + 1].lvinvr[0] = 0;
  return 0;
}                               /* addreg_ */



int 
fillRegArray (void)
{
  char charKey;
  linelist ln = regTab.strings;
  int lineNum = 0;
  double mass, width;
  char invStr[STRSIZ], massStr[STRSIZ], widthStr[STRSIZ];

  inireg_ ();
  while (ln != NULL)
    {
      int power = 0;
      char lv[PLISTLEN] = "";
      invStr[1] = 0;
      massStr[0] = 0;
      widthStr[0] = 0;
      lineNum++;

      sscanf (ln->line, "%[^|]%*c%[^|]%*c%[^|]%*c%d", invStr + 1, massStr, widthStr, &power);

/*============ Invariant ===========*/
      trim (invStr + 1);
      invStr[0] = 'S';
      if (!checkPhysVal (invStr, &charKey, lv))
        {
          sprintf (errorText, " Error in  regularization table line %d .\n"
                   " Wrong field 'Momentum' .", lineNum);
          goto errorExit;
        }

      coninv_ (lv);
/*================ Mass ============*/
      if (calcExpression (massStr, rd_num, &mass))
        {
          sprintf (errorText, " Error in  regularization table line %d .\n"
                   " Wrong field 'Mass' .", lineNum);
          goto errorExit;
        }
/*==================Width ==========*/
      if (calcExpression (widthStr, rd_num, &width))
        {
          sprintf (errorText, " Error in  regularization table line %d .\n"
                   " Wrong field 'Width' .", lineNum);
          goto errorExit;
        }

/*============ Power ===============*/
      if (power < 1 || power > 2)
        {
          sprintf (errorText, " Error in  regularization table line %d .\n"
                   " Power is out of range.", lineNum);
          goto errorExit;
        }
      addreg_ (lv, mass, width, power);
      ln = ln->next;
    }


  return 0;
errorExit: warnanykey (2, 10, errorText);
  return 1;
}

int 
WriteRegularisations (FILE * nchan)
{
  fprintf (nchan, "\n");
  writetable0 (&regTab, nchan);
  return 0;
}
int 
ReadRegularisations (FILE * nchan)
{
  fscanf (nchan, "\n");
  return readtable0 (&regTab, nchan);
}


int 
getreg_ (int *nsing, sing_struct * singar,
         double shift, double fmult, int n)
{
  double d__1;

  for (; n && *nsing < 100; n = invreg_1[n - 1].nextrg)
    {
      ++(*nsing);
      d__1 = invreg_1[n - 1].rgmass;    /* Computing 2nd power */
      singar[*nsing - 1].pos = (d__1 * d__1 - shift) * fmult;
      singar[*nsing - 1].width = (d__1 = invreg_1[n - 1].rgmass
                              * invreg_1[n - 1].rgwdth * fmult, ABS (d__1));
      singar[*nsing - 1].power = invreg_1[n - 1].ndeg;
    }
  return 0;
}                               /* getreg_ */