/* Copyright (C) 2005 The Scalable Software Infrastructure Project. All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:
   1. Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
   3. Neither the name of the project nor the names of its contributors 
      may be used to endorse or promote products derived from this software 
      without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE SCALABLE SOFTWARE INFRASTRUCTURE PROJECT
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE SCALABLE SOFTWARE INFRASTRUCTURE
   PROJECT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
   OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   POSSIBILITY OF SUCH DAMAGE.
*/

#ifdef HAVE_CONFIG_H
	#include "lis_config.h"
#else
#ifdef HAVE_CONFIG_WIN_H
	#include "lis_config_win.h"
#endif
#endif

#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_MALLOC_H
        #include <malloc.h>
#endif
#include <string.h>
#include <stdarg.h>
#ifdef _OPENMP
	#include <omp.h>
#endif
#ifdef USE_MPI
	#include <mpi.h>
#endif
#include "lislib.h"

/************************************************
 * lis_output
 * lis_output_matrix
 * lis_output_vector
 * lis_output_vector_plain
 * lis_output_vector_mm
 * lis_output_vector_lis_ascii
 * lis_solver_output_rhistory
 * lis_esolver_output_rhistory
 ************************************************/

#undef __FUNC__
#define __FUNC__ "lis_output"
LIS_INT lis_output(LIS_MATRIX A, LIS_VECTOR b, LIS_VECTOR x, LIS_INT format, char *path)
{
	LIS_INT	err;
	LIS_MATRIX B;

	LIS_DEBUG_FUNC_IN;

	#ifdef USE_MPI
		MPI_Barrier(A->comm);
	#endif
	err = lis_matrix_check(A,LIS_MATRIX_CHECK_ALL);
	if( err ) return err;

	if( format==LIS_FMT_MM || format==LIS_FMT_MMB )
	{
		switch( A->matrix_type )
		{
		case LIS_MATRIX_CSR:
			err = lis_output_mm_csr(A,b,x,format,path);
			break;
		default:
			err = lis_matrix_duplicate(A,&B);
			if( err ) return err;
			lis_matrix_set_type(B,LIS_MATRIX_CSR);
			err = lis_matrix_convert(A,B);
			if( err ) return err;
			err = lis_output_mm_csr(B,b,x,format,path);
			lis_matrix_destroy(B);
			break;
		}
	}

	LIS_DEBUG_FUNC_OUT;
	return err;
}

#undef __FUNC__
#define __FUNC__ "lis_output"
LIS_INT lis_output_matrix(LIS_MATRIX A, LIS_INT format, char *path)
{
	LIS_INT err;
	LIS_MATRIX B;
	LIS_VECTOR b,x;

	LIS_DEBUG_FUNC_IN;

	#ifdef USE_MPI
		MPI_Barrier(A->comm);
	#endif
	err = lis_matrix_check(A,LIS_MATRIX_CHECK_ALL);
	if( err ) return err;

	err = lis_vector_create(LIS_COMM_WORLD,&b);
	err = lis_vector_create(LIS_COMM_WORLD,&x);

	if( format==LIS_FMT_MM || format==LIS_FMT_MMB )
	{
		switch( A->matrix_type )
		{
		case LIS_MATRIX_CSR:
			err = lis_output_mm_csr(A,b,x,format,path);
			break;
		default:
			err = lis_matrix_duplicate(A,&B);
			if( err ) return err;
			lis_matrix_set_type(B,LIS_MATRIX_CSR);
			err = lis_matrix_convert(A,B);
			if( err ) return err;
			err = lis_output_mm_csr(B,b,x,format,path);
			lis_matrix_destroy(B);
			break;
		}
	}

	err = lis_vector_destroy(b);
	err = lis_vector_destroy(x);

	LIS_DEBUG_FUNC_OUT;
	return err;
}

#undef __FUNC__
#define __FUNC__ "lis_output_vector"
LIS_INT lis_output_vector(LIS_VECTOR v, LIS_INT format, char *filename)
{
	LIS_INT err;

	LIS_DEBUG_FUNC_IN;

	#ifdef USE_MPI
		MPI_Barrier(v->comm);
	#endif
	err = lis_vector_check(v,LIS_VECTOR_CHECK_NULL);
	if( err ) return err;

	switch( format )
	{
	case LIS_FMT_PLAIN:
		err = lis_output_vector_plain(v,filename);
		break;
	case LIS_FMT_MM:
		err = lis_output_vector_mm(v,filename);
		break;
	case LIS_FMT_LIS:
		err = lis_output_vector_lis_ascii(v,filename);
		break;
	default:
		LIS_SETERR(LIS_ERR_ILL_ARG,"ill format option\n");
		return LIS_ERR_ILL_ARG;
		break;
	}

	LIS_DEBUG_FUNC_OUT;
	return err;
}

#undef __FUNC__
#define __FUNC__ "lis_output_vector_plain"
LIS_INT lis_output_vector_plain(LIS_VECTOR v, char *path)
{
	LIS_INT	n,i;
	#ifdef USE_MPI
		LIS_INT pe,nprocs,my_rank;
		LIS_INT	err,ret;
	#endif
	FILE *file;

	LIS_DEBUG_FUNC_IN;

#ifdef USE_MPI
	nprocs    = v->nprocs;
	my_rank   = v->my_rank;
	n         = v->n;

	err = 0;
	for(pe=0;pe<nprocs;pe++)
	{
		if( my_rank==pe )
		{
			if( my_rank==0 )
			{
				file = fopen(path, "w");
			}
			else
			{
				file = fopen(path, "a");
			}
			if( file==NULL )
			{
				LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
				err = 1;
			}
			for(i=0;i<n;i++)
			{
			  if (v->intvalue) 
			    {
#ifdef _LONG__LONG
			      fprintf(file, "%28lld\n", (long long int)v->value[i]);
#else
			      fprintf(file, "%28d\n", (int)v->value[i]);
#endif
			    }
			  else
			    {
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
			        fprintf(file, "%28.20Le %28.20Le\n", creall(v->value[i]), cimagl(v->value[i]));
#else
			        fprintf(file, "%28.20e %28.20e\n", creal(v->value[i]), cimag(v->value[i]));
#endif
#else
#ifdef _LONG__DOUBLE
				fprintf(file, "%28.20Le\n", v->value[i]);
#else
				fprintf(file, "%28.20e\n", v->value[i]);
#endif
#endif				
			    }
			}
			fclose(file);
		}
		MPI_Allreduce(&err,&ret,1,LIS_MPI_INT,MPI_SUM,v->comm);
		if( ret )
		{
			return LIS_FAILS;
		}
	}
	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#else
	n         = v->n;

	file = fopen(path, "w");
	if( file==NULL )
	{
		LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
		return LIS_ERR_FILE_IO;
	}
	for(i=0;i<n;i++)
	{
	  if (v->intvalue)
	    {
#ifdef _LONG__LONG
	      fprintf(file, "%28lld\n", (long long int)v->value[i]);
#else
	      fprintf(file, "%28d\n", (int)v->value[i]);
#endif
	    }
	  else
	    {
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
		fprintf(file, "%28.20Le %28.20Le\n", creall(v->value[i]), cimagl(v->value[i]));
#else
		fprintf(file, "%28.20e %28.20e\n", creal(v->value[i]), cimag(v->value[i]));
#endif
#else
#ifdef _LONG__DOUBLE
		fprintf(file, "%28.20Le\n", v->value[i]);
#else
		fprintf(file, "%28.20e\n", v->value[i]);
#endif
#endif					
	    }
	}
	fclose(file);
	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#endif
}

#undef __FUNC__
#define __FUNC__ "lis_output_vector_mm"
LIS_INT lis_output_vector_mm(LIS_VECTOR v, char *path)
{
	LIS_INT	i,n,is;
	#ifdef USE_MPI
		LIS_INT	pe,nprocs,my_rank;
		LIS_INT	err,ret;
	#endif
	FILE *file;

	LIS_DEBUG_FUNC_IN;
#ifdef USE_MPI
	nprocs    = v->nprocs;
	my_rank   = v->my_rank;
	n         = v->n;
	is        = v->is; 

	err = 0;
	if( my_rank==0 )
	{
		file = fopen(path, "w");
		if( file==NULL )
		{
			LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
			err = 1;
		}

		if (v->intvalue) 
		  {
		    fprintf(file, "%%%%MatrixMarket vector coordinate integer general\n");
		  }
		else
		  {
#ifdef _COMPLEX					
		    fprintf(file, "%%%%MatrixMarket vector coordinate complex general\n");
#else
		    fprintf(file, "%%%%MatrixMarket vector coordinate real general\n");
#endif					
		  }
#ifdef _LONG__LONG
		fprintf(file, "%lld\n", v->gn);
#else
		fprintf(file, "%d\n", v->gn);
#endif
		fclose(file);
	}
	MPI_Allreduce(&err,&ret,1,LIS_MPI_INT,MPI_SUM,v->comm);
	if( ret )
	{
		return LIS_FAILS;
	}

	err = 0;
	for(pe=0;pe<nprocs;pe++)
	{
		if( my_rank==pe )
		{
			file = fopen(path, "a");
			if( file==NULL )
			{
				LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
				err = 1;
			}
			else
			{
				for(i=0;i<n;i++)
				{
				  if (v->intvalue)
				    {
#ifdef _LONG__LONG
				      fprintf(file, "%lld %28lld\n", i+is+1, (long long int)v->value[i]); 
#else
				      fprintf(file, "%d %28d\n", i+is+1, (int)v->value[i]); 
#endif
				    }
				  else
				    {
#ifdef _COMPLEX
#ifdef _LONG__LONG
#ifdef _LONG__DOUBLE
					fprintf(file, "%lld %28.20Le %28.20Le\n", i+is+1, creall(v->value[i]), cimagl(v->value[i])); 
#else
					fprintf(file, "%lld %28.20e %28.20e\n", i+is+1, creal(v->value[i]), cimag(v->value[i])); 
#endif
#else
#ifdef _LONG__DOUBLE
					fprintf(file, "%d %28.20Le %28.20Le\n", i+is+1, creall(v->value[i]), cimagl(v->value[i])); 
#else
					fprintf(file, "%d %28.20e %28.20e\n", i+is+1, creal(v->value[i]), cimag(v->value[i])); 
#endif
#endif
#else
#ifdef _LONG__LONG
#ifdef _LONG__DOUBLE
					fprintf(file, "%lld %28.20Le\n", i+is+1, v->value[i]); 
#else
					fprintf(file, "%lld %28.20e\n", i+is+1, v->value[i]); 
#endif
#else
#ifdef _LONG__DOUBLE
					fprintf(file, "%d %28.20Le\n", i+is+1, v->value[i]); 
#else
					fprintf(file, "%d %28.20e\n", i+is+1, v->value[i]); 
#endif
#endif
#endif					
				    }
				}
				fclose(file);
			}
		}
		MPI_Allreduce(&err,&ret,1,LIS_MPI_INT,MPI_SUM,v->comm);
		if( ret )
		{
			return LIS_FAILS;
		}
	}
	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#else
	n         = v->n;
	is        = v->is; 

	file = fopen(path, "w");
	if( file==NULL )
	{
		LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
		return LIS_ERR_FILE_IO;
	}

	if (v->intvalue) 
	  {
	    fprintf(file, "%%%%MatrixMarket vector coordinate integer general\n");
	  }
	else
	  {
#ifdef _COMPLEX					
	    fprintf(file, "%%%%MatrixMarket vector coordinate complex general\n");
#else
	    fprintf(file, "%%%%MatrixMarket vector coordinate real general\n");
#endif					
	  }
#ifdef _LONG__LONG
	fprintf(file, "%lld\n", v->gn);
#else
	fprintf(file, "%d\n", v->gn);
#endif

	for(i=0;i<n;i++)
	{
	  if (v->intvalue)
	    {
#ifdef _LONG__LONG
	      fprintf(file, "%lld %28lld\n", i+is+1, (long long int)v->value[i]);
#else
	      fprintf(file, "%d %28d\n", i+is+1, (int)v->value[i]);
#endif
	    }
          else
	    {
#ifdef _COMPLEX
#ifdef _LONG__LONG
#ifdef _LONG__DOUBLE
	  fprintf(file, "%lld %28.20Le %28.20Le\n", i+is+1, creall(v->value[i]), cimagl(v->value[i]));
#else
	  fprintf(file, "%lld %28.20e %28.20e\n", i+is+1, creal(v->value[i]), cimag(v->value[i]));
#endif
#else
#ifdef _LONG__DOUBLE
	  fprintf(file, "%d %28.20Le %28.20Le\n", i+is+1, creall(v->value[i]), cimagl(v->value[i]));
#else
	  fprintf(file, "%d %28.20e %28.20e\n", i+is+1, creal(v->value[i]), cimag(v->value[i]));
#endif
#endif
#else					
#ifdef _LONG__LONG
#ifdef _LONG__DOUBLE
	  fprintf(file, "%lld %28.20Le\n", i+is+1, v->value[i]);
#else
	  fprintf(file, "%lld %28.20e\n", i+is+1, v->value[i]);
#endif
#else
#ifdef _LONG__DOUBLE
	  fprintf(file, "%d %28.20Le\n", i+is+1, v->value[i]);
#else
	  fprintf(file, "%d %28.20e\n", i+is+1, v->value[i]);
#endif
#endif
#endif					
	     }
	  /* fprintf(file, "%d %28.20e\n", i+1, v->value[i]); */
	}
	fclose(file);

	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#endif
}


#undef __FUNC__
#define __FUNC__ "lis_output_vector_lis_ascii"
LIS_INT lis_output_vector_lis_ascii(LIS_VECTOR v, char *path)
{
	LIS_INT	i,n;
	#ifdef USE_MPI
		LIS_INT	pe,nprocs,my_rank;
		LIS_INT	err,ret;
	#endif
	FILE *file;

	LIS_DEBUG_FUNC_IN;
#ifdef USE_MPI
	nprocs    = v->nprocs;
	my_rank   = v->my_rank;
	n         = v->n;

	err = 0;
	if( my_rank==0 )
	{
		file = fopen(path, "w");
		if( file==NULL )
		{
			LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
			err = 1;
		}

		fprintf(file, "#LIS A vec\n");
#ifdef _LONG__LONG
		fprintf(file, "%lld\n", nprocs);
#else
		fprintf(file, "%d\n", nprocs);
#endif
		fclose(file);
	}
	MPI_Allreduce(&err,&ret,1,LIS_MPI_INT,MPI_SUM,v->comm);
	if( ret )
	{
		return LIS_FAILS;
	}

	err = 0;
	for(pe=0;pe<nprocs;pe++)
	{
		if( my_rank==pe )
		{
			file = fopen(path, "a");
			if( file==NULL )
			{
				LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
				err = 1;
			}
			else
			{
#ifdef _LONG__LONG
				fprintf(file, "# %lld %lld\n", pe, v->n);
#else
				fprintf(file, "# %d %d\n", pe, v->n);
#endif
				for(i=0;i<n;i++)
				{
				  if (v->intvalue) 
				    {
#ifdef _LONG__LONG
				      fprintf(file, "%28lld ",(long long int)v->value[i]);
#else
				      fprintf(file, "%28d ",(int)v->value[i]);
#endif
				    }
				  else
				    {
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
			  	        fprintf(file, "%28.20Le %28.20Le ",creall(v->value[i]), cimagl(v->value[i]));
#else
				        fprintf(file, "%28.20e %28.20e ",creal(v->value[i]), cimag(v->value[i]));
#endif
#else				      
#ifdef _LONG__DOUBLE
					fprintf(file, "%28.20Le ",v->value[i]);
#else
					fprintf(file, "%28.20e ",v->value[i]);
#endif
#endif					
					if( (i+1)%3==0 ) fprintf(file, "\n");
				    }
				}
				if( n%3!=0 ) fprintf(file, "\n");
				fclose(file);
			}
		}
		MPI_Allreduce(&err,&ret,1,LIS_MPI_INT,MPI_SUM,v->comm);
		if( ret )
		{
			return LIS_FAILS;
		}
	}
	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#else
	n         = v->n;

	file = fopen(path, "w");
	if( file==NULL )
	{
		LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", path);
		return LIS_ERR_FILE_IO;
	}

	fprintf(file, "#LIS A vec\n");
	fprintf(file, "1\n");

#ifdef _LONG__LONG
	fprintf(file, "# 0 %lld\n", v->n);
#else
	fprintf(file, "# 0 %d\n", v->n);
#endif
	for(i=0;i<n;i++)
	{
	  if (v->intvalue)
	    {
#ifdef _LONG__LONG
	      fprintf(file, "%28lld ",(long long int)v->value[i]);
#else
	      fprintf(file, "%28d ",(int)v->value[i]);
#endif
	    }
	  else
	    {
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
  	        fprintf(file, "%28.20Le %28.20Le ",creall(v->value[i]),cimag(v->value[i]));
#else
	        fprintf(file, "%28.20e %28.20e ",creall(v->value[i]),cimag(v->value[i]));
#endif
#else	      
#ifdef _LONG__DOUBLE
		fprintf(file, "%28.20Le ",v->value[i]);
#else
		fprintf(file, "%28.20e ",v->value[i]);
#endif
#endif		
	    }
		if( (i+1)%3==0 ) fprintf(file, "\n");
	}
	if( n%3!=0 ) fprintf(file, "\n");
	fclose(file);

	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#endif
}

#undef __FUNC__
#define __FUNC__ "lis_solver_output_rhistory"
LIS_INT lis_solver_output_rhistory(LIS_SOLVER solver, char *filename)
{
	LIS_INT	i,maxiter;
	#ifdef USE_MPI
		LIS_INT	my_rank;
	#endif
	FILE *file;

	LIS_DEBUG_FUNC_IN;

	maxiter = solver->iter+1;
	if( solver->retcode!=LIS_SUCCESS )
	{
		maxiter--;
	}
#ifdef USE_MPI
	if( solver->rhistory==NULL )
	{
		LIS_SETERR(LIS_FAILS,"residual history is empty\n");
		return LIS_FAILS;
	}
	if( solver->A==NULL )
	{
		LIS_SETERR(LIS_FAILS,"matrix A is NULL\n");
		return LIS_FAILS;
	}

	MPI_Barrier(solver->A->comm);
	my_rank = solver->A->my_rank;
	if( my_rank==0 )
	{
		file = fopen(filename, "w");
		if( file==NULL )
		{
			LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", filename);
		}
		else
		{
			for(i=0;i<maxiter;i++)
			{
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
				fprintf(file, "%Le\n", creall(solver->rhistory[i]));
#else
				fprintf(file, "%e\n", creal(solver->rhistory[i]));
#endif
#else			  
#ifdef _LONG__DOUBLE
				fprintf(file, "%Le\n", solver->rhistory[i]);
#else
				fprintf(file, "%e\n", solver->rhistory[i]);
#endif
#endif				
			}
			fclose(file);
		}
	}
	MPI_Barrier(solver->A->comm);

	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#else
	if( solver->rhistory==NULL )
	{
		LIS_SETERR(LIS_FAILS,"residual history is empty\n");
		return LIS_FAILS;
	}
	file = fopen(filename, "w");
	if( file==NULL )
	{
		LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", filename);
		return LIS_ERR_FILE_IO;
	}
	for(i=0;i<maxiter;i++)
	{
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
		fprintf(file, "%Le\n", creall(solver->rhistory[i]));
#else
		fprintf(file, "%e\n", creal(solver->rhistory[i]));
#endif
#else
#ifdef _LONG__DOUBLE
		fprintf(file, "%Le\n", solver->rhistory[i]);
#else
		fprintf(file, "%e\n", solver->rhistory[i]);
#endif
#endif		
	}
	fclose(file);
	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#endif
}

#undef __FUNC__
#define __FUNC__ "lis_esolver_output_rhistory"
LIS_INT lis_esolver_output_rhistory(LIS_ESOLVER esolver, char *filename)
{
	LIS_INT	i,maxiter;
	#ifdef USE_MPI
		LIS_INT	my_rank;
	#endif
	FILE *file;

	LIS_DEBUG_FUNC_IN;

	maxiter = esolver->iter[0]+1;
	if( esolver->retcode!=LIS_SUCCESS )
	{
		maxiter--;
	}
#ifdef USE_MPI
	if( esolver->rhistory==NULL )
	{
		LIS_SETERR(LIS_FAILS,"eigensolver's residual history is empty\n");
		return LIS_FAILS;
	}
	if( esolver->A==NULL )
	{
		LIS_SETERR(LIS_FAILS,"matrix A is NULL\n");
		return LIS_FAILS;
	}

	MPI_Barrier(esolver->A->comm);
	my_rank = esolver->A->my_rank;
	if( my_rank==0 )
	{
		file = fopen(filename, "w");
		if( file==NULL )
		{
			LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", filename);
		}
		else
		{
			for(i=0;i<maxiter;i++)
			{
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
				fprintf(file, "%Le\n", creall(esolver->rhistory[i]));
#else
				fprintf(file, "%e\n", creal(esolver->rhistory[i]));
#endif
#else
#ifdef _LONG__DOUBLE
				fprintf(file, "%Le\n", esolver->rhistory[i]);
#else
				fprintf(file, "%e\n", esolver->rhistory[i]);
#endif
#endif				
			}
			fclose(file);
		}
	}
	MPI_Barrier(esolver->A->comm);

	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#else
	if( esolver->rhistory==NULL )
	{
		LIS_SETERR(LIS_FAILS,"eigensolver's residual history is empty\n");
		return LIS_FAILS;
	}
	file = fopen(filename, "w");
	if( file==NULL )
	{
		LIS_SETERR1(LIS_ERR_FILE_IO,"cannot open file %s\n", filename);
		return LIS_ERR_FILE_IO;
	}
	for(i=0;i<maxiter;i++)
	{
#ifdef _COMPLEX
#ifdef _LONG__DOUBLE
		fprintf(file, "%Le\n", creall(esolver->rhistory[i]));
#else
		fprintf(file, "%e\n", creal(esolver->rhistory[i]));
#endif
#else	  
#ifdef _LONG__DOUBLE
		fprintf(file, "%Le\n", esolver->rhistory[i]);
#else
		fprintf(file, "%e\n", esolver->rhistory[i]);
#endif
#endif		
	}
	fclose(file);
	LIS_DEBUG_FUNC_OUT;
	return LIS_SUCCESS;
#endif
}

