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/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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   < BioEM software for Bayesian inference of Electron Microscopy images>
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   Copyright (C) 2016 Pilar Cossio, David Rohr, Fabio Baruffa, Markus Rampp, 
        Volker Lindenstruth and Gerhard Hummer.
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   Max Planck Institute of Biophysics, Frankfurt, Germany.
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   Frankfurt Institute for Advanced Studies, Goethe University Frankfurt, Germany.
   Max Planck Computing and Data Facility, Garching, Germany. 
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   Released under the GNU Public License, v3. 
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   See license statement for terms of distribution.
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   Note: This program contains subroutine "read_MRC" of the Situs 2.7.2 program. 
   Ref: Willy Wriggers. Using Situs for the Integration of Multi-Resolution Structures. 
   Biophysical Reviews, 2010, Vol. 2, pp. 21-27.
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   with a GPL lisences version 3.
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   ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

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#include <fstream>
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <cstring>
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#include <math.h>
#include <fftw3.h>
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#ifdef WITH_OPENMP
#include <omp.h>
#endif

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#include "map.h"
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#include "param.h"
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#include "bioem.h"
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using namespace std;

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int bioem_RefMap::readRefMaps(bioem_param& param, const char* filemap)
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{
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  numPixels = param.param_device.NumberPixels;
  refMapSize = param.param_device.NumberPixels * param.param_device.NumberPixels;
  // **************************************************************************************
  // ***********************Reading reference Particle Maps************************
  // **************************************************************************************
  int allocsize = 0;
  if (param.loadMap)
    {
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      //************** Loading Map from Binary file *******
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      FILE* fp = fopen("maps.dump", "rb");
      if (fp == NULL)
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	{
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	  cout << "Error opening dump file\n";
	  exit(1);
	}
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      size_t elements_read;
      elements_read = fread(&ntotRefMap, sizeof(ntotRefMap), 1, fp);
      if (elements_read != 1)
      {
        cout << "Error reading file\n";
        exit(1);
      }
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      maps = (myfloat_t*) mallocchk(ntotRefMap * refMapSize * sizeof(myfloat_t));
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      elements_read = fread(maps, sizeof(myfloat_t) * refMapSize, ntotRefMap, fp);
      if (elements_read != (size_t) ntotRefMap)
      {
        cout << "Error reading file\n";
        exit(1);
      }

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      fclose(fp);

      cout << "Particle Maps read from Map Dump\n";
    }
  else if(readMRC)
    {
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      //************** Reading MRC file *******
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      ntotRefMap=0;

      if(readMultMRC)
	{
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	  //************** Reading Multiple MRC files *************
	  cout << "Opening File with MRC list names: " << filemap << "\n"; 
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	  ifstream input(filemap);

	  if (!input.good())
	    {
	      cout << "Failed to open file contaning MRC names: " << filemap << "\n";
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	      exit(1);
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	    }

	  char line[512] = {0};
	  char mapname[100];
	  char tmpm[10] = {0};
	  const char* indifile;

	  while (!input.eof())
	    {
	      input.getline(line,511);
	      char tmpVals[100]  = {0};

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	      string strline(line);
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	      //	 cout << "MRC File name:" << strline << "\n";
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	      strncpy (tmpVals,line,99);
	      sscanf (tmpVals,"%99c",mapname);

	      // Check for last line
	      strncpy (tmpm,mapname,3);
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	      if(strcmp(tmpm,"XXX")!=0)
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		{
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		  indifile=strline.c_str();
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		  //   size_t foundpos= strline.find("mrc");
		  //   size_t endpos = strline.find_last_not_of(" \t");
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		  //Reading Multiple MRC
		  read_MRC(indifile,param);
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		}
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	      for(int i=0;i<3;i++)mapname[i] = 'X';
	      for(int i=3;i<100;i++)mapname[i] = 0;
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	    }
	  cout << "\n+++++++++++++++++++++++++++++++++++++++++++ \n";
	  cout << "Particle Maps read from MULTIPLE MRC Files in: " << filemap << "\n" ;
	}
      else
	{
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	  string strfilename(filemap);
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	  size_t foundpos= strfilename.find("mrc");
	  size_t endpos = strfilename.find_last_not_of(" \t");
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	  if(foundpos > endpos){
	    cout << "Warining:::: mrc extension NOT dectected in file name::" << filemap <<" \n";
	    cout << "Warining::::  Are you sure you want to read an MRC? \n";
	  }
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	  read_MRC(filemap,param);
	  cout << "\n++++++++++++++++++++++++++++++++++++++++++ \n";
	  cout << "Particle Maps read from ONE MRC File: " << filemap << "\n" ;
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	}
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    }
  else
    {
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      //************** Reading Text file *************
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      int nummap = -1;
      int lasti = 0;
      int lastj = 0;
      ifstream input(filemap);
      if (!input.good())
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	{
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	  cout << "Particle Maps Failed to open file" << endl ;
	  exit(1);
	}

      char line[512] = {0};
      char tmpLine[512] = {0};
      bool first=true;
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      int countpix=0;
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      while (!input.eof())
	{
	  input.getline(line, 511);

	  strncpy(tmpLine, line, strlen(line));
	  char *token = strtok(tmpLine, " ");

	  if(first){
	    if (strcmp(token, "PARTICLE") != 0) {
	      cout << "Missing correct Standard Map Format: PARTICLE HEADER\n"<< endl ;
	      exit(1);
	    }
	    first=false;
	  }

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	  if (strcmp(token, "PARTICLE") == 0) // to count the number of maps
	    {
	      nummap++;
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	      countpix=0;
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	      if (allocsize == 0)
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		{
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		  allocsize = 64;
		  maps = (myfloat_t*) mallocchk(refMapSize * sizeof(myfloat_t) * allocsize);
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		}
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	      else if (nummap + 1 >= allocsize)
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		{
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		  allocsize *= 2;
		  maps = (myfloat_t*) reallocchk(maps, refMapSize * sizeof(myfloat_t) * allocsize);
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		}
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	      if (nummap % 128 == 0)
		{
		  cout << "..." << nummap << "\n";
		}
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	      if(lasti+1 != param.param_device.NumberPixels && lastj+1 != param.param_device.NumberPixels && nummap > 0)
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		{
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		  cout << "PROBLEM INCONSISTENT NUMBER OF PIXELS IN MAPS AND INPUTFILE ( " << param.param_device.NumberPixels << ", i " << lasti << ", j " << lastj << ")" << "\n";
		  exit(1);
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		}
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	    }
	  else
	    {
	      int i, j;
	      float z;
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	      char tmpVals[36]  = {0};
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	      strncpy (tmpVals, line, 8);
	      sscanf (tmpVals, "%d", &i);

	      strncpy (tmpVals, line + 8, 8);
	      sscanf (tmpVals, "%d", &j);

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	      strncpy (tmpVals, line + 16, 16);
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	      sscanf (tmpVals, "%f", &z);
	      //checking for Map limits
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	      if(i > -1 && i  < param.param_device.NumberPixels && j > -1 && j  < param.param_device.NumberPixels)
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		{
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		  countpix++;
		  maps[nummap * refMapSize + i * numPixels + j] = (myfloat_t) z;
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		  lasti = i;
		  lastj = j;
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		  //	 cout << countpix << " " << param.param_device.NumberPixels*param.param_device.NumberPixels << "\n";
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		}
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	      else
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		{
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		  cout << "PROBLEM READING MAP (Map number " << nummap << ", i " << i << ", j " << j << ")" << "\n";
		  exit(1);
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		}
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	    }
	}
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      if(lasti != param.param_device.NumberPixels-1 || lastj != param.param_device.NumberPixels-1 || countpix != param.param_device.NumberPixels*param.param_device.NumberPixels +1 )
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	{
	  cout << "PROBLEM INCONSISTENT NUMBER OF PIXELS IN MAPS AND INPUTFILE ( " << param.param_device.NumberPixels << ", i " << lasti << ", j " << lastj << ")" << "\n";
	  exit(1);
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	}
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      cout << ".";
      ntotRefMap = nummap + 1;
      maps = (myfloat_t*) reallocchk(maps, refMapSize * sizeof(myfloat_t) * ntotRefMap);
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      cout << "Particle Maps read from Standard File: " << ntotRefMap << "\n";
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    }
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  //************* If Dumping Maps *********************
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  if (param.dumpMap)
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    {
      FILE* fp = fopen("maps.dump", "w+b");
      if (fp == NULL)
	{
	  cout << "Error opening dump file\n";
	  exit(1);
	}
      fwrite(&ntotRefMap, sizeof(ntotRefMap), 1, fp);
      fwrite(maps, sizeof(myfloat_t) * refMapSize, ntotRefMap, fp);
      fclose(fp);
    }
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  //*********** To Debug with few Maps ********************
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  if (getenv("BIOEM_DEBUG_NMAPS"))
    {
      ntotRefMap = atoi(getenv("BIOEM_DEBUG_NMAPS"));
    }
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  cout << "Total Number of particles: " << ntotRefMap;
  cout << "\n+++++++++++++++++++++++++++++++++++++++++++ \n";

  return(0);
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}

int bioem_RefMap::PreCalculateMapsFFT(bioem_param& param)
{
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  // **************************************************************************************
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  // ********** Routine that pre-calculates Reference maps FFT for Convolution/ Comparison **********************
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  // ************************************************************************************
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  RefMapsFFT = new mycomplex_t[ntotRefMap * param.FFTMapSize];
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#pragma omp parallel for
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  for (int iRefMap = 0; iRefMap < ntotRefMap ; iRefMap++)
    {
      const int num = omp_get_thread_num();
      myfloat_t* localMap = param.fft_scratch_real[num];
      mycomplex_t* localout = param.fft_scratch_complex[num];

      //Assigning localMap values to padded Map
      for(int i = 0; i < param.param_device.NumberPixels; i++)
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	{
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	  for(int j = 0; j < param.param_device.NumberPixels; j++)
	    {
	      localMap[i * param.param_device.NumberPixels + j] = maps[iRefMap * refMapSize + i * param.param_device.NumberPixels + j];
	    }
	}
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      //Calling FFT_Forward
      myfftw_execute_dft_r2c(param.fft_plan_r2c_forward, localMap, localout);
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      //Saving the Reference CTFs (RefMap array possibly has incorrect alignment, so we copy here. Stupid but in fact does not matter.)
      mycomplex_t* RefMap = &RefMapsFFT[iRefMap * param.FFTMapSize];
               
      for(int i = 0; i < param.param_device.NumberPixels * param.param_device.NumberFFTPixels1D ; i++ )
	{
	  RefMap[i][0] = localout[i][0]; 
	  RefMap[i][1] = localout[i][1]; 
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	}
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    }
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  return(0);
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}
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int bioem_RefMap::precalculate(bioem_param& param, bioem& bio)
{
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  // **************************************************************************************
  // *******************************Precalculating Routine for Maps************************
  // **************************************************************************************
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  sum_RefMap = (myfloat_t*) mallocchk(sizeof(myfloat_t) * ntotRefMap);
  sumsquare_RefMap = (myfloat_t*) mallocchk(sizeof(myfloat_t) * ntotRefMap);
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  //Precalculating cross-correlations of maps
#pragma omp parallel for
  for (int iRefMap = 0; iRefMap < ntotRefMap ; iRefMap++)
    {
      myfloat_t sum, sumsquare;
      bio.calcross_cor(getmap(iRefMap), sum, sumsquare);
      //Storing Crosscorrelations in Map class
      sum_RefMap[iRefMap] = sum;
      sumsquare_RefMap[iRefMap] = sumsquare;
    }

  // Precalculating Maps in Fourier space
  if (bio.FFTAlgo)
    {
      PreCalculateMapsFFT(param);
      free(maps);
      maps = NULL;
    }

  return(0);
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}
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void bioem_Probability::init(size_t maps, size_t angles, size_t cc, bioem& bio)
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{
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  //********** Initializing pointers *******************
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  nMaps = maps;
  nAngles = angles;
  nCC = cc;
  ptr = bio.malloc_device_host(get_size(maps, angles, cc, bio.param.param_device.writeAngles, bio.param.param_device.writeCC));
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  cout << "Allocation #Maps " << maps << " #Angles " << angles << " #cross.cor " << cc << "\n";
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  //<< " == " << get_size(maps, angles, cc, bio.param.param_device.writeAngles, bio.param.param_device.writeCC)<< "\n";
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  set_pointers();
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}
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void bioem_Probability::copyFrom(bioem_Probability* from, bioem& bio)
{
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  bioem_Probability_map& pProbMap = getProbMap(0);
  bioem_Probability_map& pProbMapFrom = from->getProbMap(0);
  memcpy(&pProbMap, &pProbMapFrom, from->nMaps * sizeof(bioem_Probability_map));
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  if (bio.param.param_device.writeAngles)
    {
      for (int iOrient = 0; iOrient < nAngles; iOrient ++)
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	{
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	  bioem_Probability_angle& pProbAngle = getProbAngle(0, iOrient);
	  bioem_Probability_angle& pProbAngleFrom = from->getProbAngle(0, iOrient);
	  memcpy(&pProbAngle, &pProbAngleFrom, from->nMaps * sizeof(bioem_Probability_angle));
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	}
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    }
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  if (bio.param.param_device.writeCC)
    {
      for (int iCC = 0; iCC < nCC; iCC ++)
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	{
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	  bioem_Probability_cc& pProbCC = getProbCC(0, iCC);
	  bioem_Probability_cc& pProbCCFrom = from->getProbCC(0, iCC);
	  memcpy(&pProbCC, &pProbCCFrom, from->nMaps * sizeof(bioem_Probability_cc));
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	}
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    }
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}

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int bioem_RefMap::read_MRC(const char* filename,bioem_param& param)
{
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  /* 	 subroutine "read_MRC" of the Situs 2.7.2 program. 
	 Ref: Willy Wriggers. Using Situs for the Integration of Multi-Resolution Structures. 
	 Biophysical Reviews, 2010, Vol. 2, pp. 21-27.*/


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  myfloat_t st,st2;
  unsigned long count;
  FILE *fin;
  float currfloat;
  int nc, nr, ns, swap, header_ok = 1;
  float xlen, ylen, zlen;
  int mode, ncstart, nrstart, nsstart, ispg, nsymbt, lskflg;
  float a_tmp, b_tmp, g_tmp;
  int  mx, my, mz,mapc, mapr, maps_local;
  float dmin, dmax, dmean;
  int n_range_viol0, n_range_viol1;

  fin = fopen(filename, "rb");
  if( fin == NULL ) {
    cout << "ERROR opening MRC: " << filename;
    exit(1);
  }
  n_range_viol0 = test_mrc(filename,0);
  n_range_viol1 = test_mrc(filename,1);

  if (n_range_viol0 < n_range_viol1) { //* guess endianism
    swap = 0;
    if (n_range_viol0 > 0) {
      printf(" Warning: %i header field range violations detected in file %s \n", n_range_viol0,filename);
    }
  } else {
    swap = 1;
    if (n_range_viol1 > 0) {
      printf("Warning: %i header field range violations detected in file %s \n", n_range_viol1,filename);
    }
  }
  printf("\n+++++++++++++++++++++++++++++++++++++++++++\n");
  printf("Reading Information from MRC: %s \n", filename);
  header_ok *= read_int(&nc,fin,swap);
  header_ok *= read_int(&nr,fin,swap);
  header_ok *= read_int(&ns,fin,swap);
  header_ok *= read_int(&mode,fin,swap);
  header_ok *= read_int(&ncstart,fin,swap);
  header_ok *= read_int(&nrstart,fin,swap);
  header_ok *= read_int(&nsstart,fin,swap);
  header_ok *= read_int(&mx,fin,swap);
  header_ok *= read_int(&my,fin,swap);
  header_ok *= read_int(&mz,fin,swap);
  header_ok *= read_float(&xlen,fin,swap);
  header_ok *= read_float(&ylen,fin,swap);
  header_ok *= read_float(&zlen,fin,swap);
  header_ok *= read_float(&a_tmp,fin,swap);
  header_ok *= read_float(&b_tmp,fin,swap);
  header_ok *= read_float(&g_tmp,fin,swap);
  header_ok *= read_int(&mapc,fin,swap);
  header_ok *= read_int(&mapr,fin,swap);
  header_ok *= read_int(&maps_local,fin,swap);
  header_ok *= read_float(&dmin,fin,swap);
  header_ok *= read_float(&dmax,fin,swap);
  header_ok *= read_float(&dmean,fin,swap);
  header_ok *= read_int(&ispg,fin,swap);
  header_ok *= read_int(&nsymbt,fin,swap);
  header_ok *= read_int(&lskflg,fin,swap);

  printf("Number Columns  = %8d \n",nc);
  printf("Number Rows     = %8d \n",nr);
  printf("Number Sections = %8d \n",ns);
  printf("MODE = %4d (only data type mode 2: 32-bit)\n",mode);
  printf("NSYMBT = %4d (# bytes symmetry operators)\n",nsymbt);

  /* printf("  NCSTART = %8d  (index of first column, counting from 0)\n",ncstart);
     printf(">  NRSTART = %8d  (index of first row, counting from 0)\n",nrstart);
     printf("  NSSTART = %8d  (index of first section, counting from 0)\n",nsstart);
     printf("       MX = %8d  (# of X intervals in unit cell)\n",mx);
     printf("       MY = %8d  (# of Y intervals in unit cell)\n",my);
     printf("       MZ = %8d  (# of Z intervals in unit cell)\n",mz);
     printf(" X length = %8.3f  (unit cell dimension)\n",xlen);
     printf(" Y length = %8.3f  (unit cell dimension)\n",ylen);
     printf(" Z length = %8.3f  (unit cell dimension)\n",zlen);
     printf("    Alpha = %8.3f  (unit cell angle)\n",a_tmp);
     printf("     Beta = %8.3f  (unit cell angle)\n",b_tmp);
     printf("    Gamma = %8.3f  (unit cell angle)\n",g_tmp);
     printf("     MAPC = %8d  (columns axis: 1=X,2=Y,3=Z)\n",mapc);
     printf("     MAPR = %8d  (rows axis: 1=X,2=Y,3=Z)\n",mapr);
     printf("     MAPS = %8d  (sections axis: 1=X,2=Y,3=Z)\n",maps_local);
     printf("     DMIN = %8.3f  (minimum density value - ignored)\n",dmin);
     printf("     DMAX = %8.3f  (maximum density value - ignored)\n",dmax);
     printf("    DMEAN = %8.3f  (mean density value - ignored)\n",dmean);
     printf("     ISPG = %8d  (space group number - ignored)\n",ispg);
     printf("   NSYMBT = %8d  (# bytes storing symmetry operators)\n",nsymbt);
     printf("   LSKFLG = %8d  (skew matrix flag: 0:none, 1:follows)\n",lskflg);*/

  if (header_ok == 0) {
    cout << "ERROR reading MRC header: " << filename;
    exit(1);
  }

  if(nr!=param.param_device.NumberPixels || nc!=param.param_device.NumberPixels )
    {
      cout << "PROBLEM INCONSISTENT NUMBER OF PIXELS IN MAPS AND INPUTFILE ( " << param.param_device.NumberPixels << ", i " << nc << ", j " << nr << ")" << "\n";
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      if(!param.notsqure)  exit(1);
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    }

  if (ntotRefMap == 0)
    {
      maps = (myfloat_t*) mallocchk(refMapSize * sizeof(myfloat_t) * ns);
    }
  else
    {
      maps = (myfloat_t*) reallocchk(maps, refMapSize * sizeof(myfloat_t) * (ntotRefMap + ns));
    }

  if(mode!=2)
    {
      cout << "ERROR with MRC mode " << mode << "\n";
      cout << "Currently mode 2 is the only one allowed" << "\n";
      exit(1);
    }
  else
    {
      rewind (fin);
      for (count=0; count<256; ++count) if (read_float_empty(fin)==0) {
	  cout << "ERROR Converting Data: " <<  filename;
	  exit(1);
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	}

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      for (count=0; count<(unsigned long)nsymbt; ++count) if (read_char_float(&currfloat,fin)==0) {
	  cout << "ERROR Converting Data: " <<  filename;
	  exit(1);
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	}

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      for ( int nmap = 0 ; nmap < ns ; nmap ++ )
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	{
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	  st=0.0;
	  st2=0.0;
	  for ( int j = 0 ; j < nr ; j ++ )
	    for ( int i = 0 ; i < nc ; i ++ )
	      {
		if (read_float(&currfloat,fin,swap)==0)
		  {
		    cout << "ERROR Converting Data: " <<  filename;
		    exit(1);
		  }
		else
		  {
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		    if(!param.notsqure){
		      maps[(nmap + ntotRefMap) * refMapSize + i * numPixels + j] = (myfloat_t) currfloat;
		      st += currfloat;
		      st2 += currfloat*currfloat;
		    } else {
		      if( i > 595 && i < 675 && j > 1250 && j< 1330 && nmap >230 && nmap <310)cout << "map1: " << i << " "<< j << " " << nmap << " " << currfloat <<"\n";
		    }
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		  }
	      }
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	  if(param.notsqure)exit(1);
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	  //Normaling maps to zero mean and unit standard deviation
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	  if(!param.notnormmap){
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	    st /= float(nr*nc);
	    st2 = sqrt(st2 / float(nr * nc) - st * st);
	    for ( int j = 0 ; j < nr ; j ++ ) for ( int i = 0 ; i < nc ; i ++ ){
		maps[(nmap + ntotRefMap) * refMapSize + i * numPixels + j] = maps[(nmap + ntotRefMap) * refMapSize + i * numPixels + j] / st2 - st/st2;
		//cout <<"MAP:: " << i << " " << j << " " <<  maps[(nmap + ntotRefMap) * refMapSize + i * numPixels + j]  << "\n";
	      }
	  }
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	}
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      ntotRefMap += ns ;
      //  cout << ntotRefMap << "\n";
    }
  fclose (fin);
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  return(0);
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}

int bioem_RefMap::read_float(float *currfloat, FILE *fin, int swap) {
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  unsigned char *cptr, tmp;

  if (fread(currfloat,4,1,fin)!=1) return 0;
  if (swap == 1) {
    cptr = (unsigned char *)currfloat;
    tmp = cptr[0];
    cptr[0]=cptr[3];
    cptr[3]=tmp;
    tmp = cptr[1];
    cptr[1]=cptr[2];
    cptr[2]=tmp;
  }
  return 1;
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}

int  bioem_RefMap::read_int(int *currlong, FILE *fin, int swap) {
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  unsigned char *cptr, tmp;

  if (fread(currlong,4,1,fin)!=1) return 0;
  if (swap == 1) {
    cptr = (unsigned char *)currlong;
    tmp = cptr[0];
    cptr[0]=cptr[3];
    cptr[3]=tmp;
    tmp = cptr[1];
    cptr[1]=cptr[2];
    cptr[2]=tmp;
  }
  return 1;
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}
int  bioem_RefMap::read_float_empty (FILE *fin) {
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  float currfloat;
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  if (fread(&currfloat,4,1,fin)!=1) return 0;
  return 1;
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}

int  bioem_RefMap::read_char_float (float *currfloat, FILE *fin) {
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  char currchar;
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  if (fread(&currchar,1,1,fin)!=1) return 0;
  *currfloat=(float)currchar;
  return 1;
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}

int  bioem_RefMap::test_mrc (const char *vol_file, int swap) {
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  FILE *fin;
  int nc, nr, ns, mx, my, mz;
  int mode, ncstart, nrstart, nsstart;
  float xlen, ylen, zlen;
  int i, header_ok = 1, n_range_viols = 0;
  int mapc, mapr, maps_local;
  float alpha, beta, gamma;
  float dmin, dmax, dmean, dummy, xorigin, yorigin, zorigin;

  fin = fopen(vol_file, "rb");
  if( fin == NULL ) {
    cout << "ERROR opening MRC: " << vol_file;
    exit(1);
  }

  //* read header info
  header_ok *= read_int(&nc,fin,swap);
  header_ok *= read_int(&nr,fin,swap);
  header_ok *= read_int(&ns,fin,swap);
  header_ok *= read_int(&mode,fin,swap);
  header_ok *= read_int(&ncstart,fin,swap);
  header_ok *= read_int(&nrstart,fin,swap);
  header_ok *= read_int(&nsstart,fin,swap);
  header_ok *= read_int(&mx,fin,swap);
  header_ok *= read_int(&my,fin,swap);
  header_ok *= read_int(&mz,fin,swap);
  header_ok *= read_float(&xlen,fin,swap);
  header_ok *= read_float(&ylen,fin,swap);
  header_ok *= read_float(&zlen,fin,swap);
  header_ok *= read_float(&alpha,fin,swap);
  header_ok *= read_float(&beta,fin,swap);
  header_ok *= read_float(&gamma,fin,swap);
  header_ok *= read_int(&mapc,fin,swap);
  header_ok *= read_int(&mapr,fin,swap);
  header_ok *= read_int(&maps_local,fin,swap);
  header_ok *= read_float(&dmin,fin,swap);
  header_ok *= read_float(&dmax,fin,swap);
  header_ok *= read_float(&dmean,fin,swap);
  for (i=23; i<50; ++i) header_ok *= read_float(&dummy,fin,swap);
  header_ok *= read_float(&xorigin,fin,swap);
  header_ok *= read_float(&yorigin,fin,swap);
  header_ok *= read_float(&zorigin,fin,swap);
  fclose (fin);
  if (header_ok == 0) {
    cout << "ERROR reading MRC header: " << vol_file;
    exit(1);
  }

  n_range_viols += (nc>5000); n_range_viols += (nc<0);
  n_range_viols += (nr>5000); n_range_viols += (nr<0);
  n_range_viols += (ns>5000); n_range_viols += (ns<0);
  n_range_viols += (ncstart>5000); n_range_viols += (ncstart<-5000);
  n_range_viols += (nrstart>5000); n_range_viols += (nrstart<-5000);
  n_range_viols += (nsstart>5000); n_range_viols += (nsstart<-5000);
  n_range_viols += (mx>5000); n_range_viols += (mx<0);
  n_range_viols += (my>5000); n_range_viols += (my<0);
  n_range_viols += (mz>5000); n_range_viols += (mz<0);
  n_range_viols += (alpha>360.0f); n_range_viols += (alpha<-360.0f);
  n_range_viols += (beta>360.0f); n_range_viols += (beta<-360.0f);
  n_range_viols += (gamma>360.0f); n_range_viols += (gamma<-360.0f);

  return n_range_viols;
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}