/* Copyright (C) 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>
#include <ctype.h>
#ifdef USE_SSE2
  #include <emmintrin.h>
#endif
#ifdef _OPENMP
  #include <omp.h>
#endif
#ifdef USE_MPI
  #include <mpi.h>
#endif
#include "lislib.h"

/************************************************
 * lis_initialize
 * lis_finalize
 * lis_text2args
 * lis_arg2args
 * lis_args_free
 * lis_ranges_create
 ************************************************/

LIS_ARGS  cmd_args = NULL;
LIS_INT      lis_mpi_initialized = LIS_FALSE;
LIS_SCALAR  *lis_vec_tmp = NULL;

#ifdef USE_QUAD_PRECISION
  #define LIS_QUAD_SCALAR_SIZE 128
  double *lis_quad_scalar_tmp = NULL;
  LIS_UNSIGNED_INT lis_x87_fpu_cw = 0;
#endif

#ifdef USE_MPI
#define LIS_MPI_MSCALAR_LEN    2
  MPI_Op      LIS_MPI_MSUM;
  MPI_Datatype  LIS_MPI_MSCALAR;
  extern void lis_mpi_msum(LIS_QUAD *invec, LIS_QUAD *inoutvec, LIS_INT *len, MPI_Datatype *datatype);
#endif

#define LIS_INIT_OPTIONS_LEN  1
#define LIS_INIT_OPTIONS_OMPNUMTHREADS    1

char *LIS_INIT_OPTNAME[] = {
  "-omp_num_threads"
};
LIS_INT LIS_INIT_OPTACT[] = {
  LIS_INIT_OPTIONS_OMPNUMTHREADS
};


/************************************************
 * lis_initialize
 * lis_finalize
 ************************************************/

#undef __FUNC__
#define __FUNC__ "lis_version"
void lis_version(void)
{
  LIS_DEBUG_FUNC_IN;

  lis_printf(LIS_COMM_WORLD,"Lis Version %s\n",LIS_VERSION);

  LIS_DEBUG_FUNC_OUT;
}

#undef __FUNC__
#define __FUNC__ "lis_initialize"
LIS_INT lis_initialize(LIS_INT* argc, char** argv[])
{
  LIS_ARGS  p;
  LIS_INT    i,nprocs;

  LIS_DEBUG_FUNC_IN;

/*  lis_memory_init();*/

  #ifdef USE_MPI
    MPI_Initialized(&lis_mpi_initialized);
    if (!lis_mpi_initialized) MPI_Init(argc, argv);

    #ifdef USE_QUAD_PRECISION
      MPI_Type_contiguous( LIS_MPI_MSCALAR_LEN, MPI_DOUBLE, &LIS_MPI_MSCALAR );
      MPI_Type_commit( &LIS_MPI_MSCALAR );
      MPI_Op_create((MPI_User_function *)lis_mpi_msum, LIS_TRUE, &LIS_MPI_MSUM);
    #endif
  #endif

  #ifdef _OPENMP
    nprocs = omp_get_max_threads();
  #endif

  lis_arg2args(*argc,*argv,&cmd_args);
  p = cmd_args->next;
  while( p!=cmd_args )
  {
    for(i=0;i<LIS_INIT_OPTIONS_LEN;i++)
    {
      if( strcmp(p->arg1, LIS_INIT_OPTNAME[i])==0 )
      {
        switch( LIS_INIT_OPTACT[i] )
        {
        case LIS_INIT_OPTIONS_OMPNUMTHREADS:
#ifdef _LONGLONG
          sscanf(p->arg2, "%lld", &nprocs);
#else
          sscanf(p->arg2, "%d", &nprocs);
#endif
          break;
        }
      }
    }
    p = p->next;
  }

  #ifdef _OPENMP
    omp_set_num_threads(nprocs);
    lis_vec_tmp = (LIS_SCALAR *)lis_malloc( nprocs*LIS_VEC_TMP_PADD*sizeof(LIS_QUAD),"lis_initialize::lis_vec_tmp" );
    if( lis_vec_tmp==NULL )
    {
      LIS_SETERR_MEM(nprocs*LIS_VEC_TMP_PADD*sizeof(LIS_QUAD));
      return LIS_ERR_OUT_OF_MEMORY;
    }
  #endif

  #ifdef USE_QUAD_PRECISION
    lis_quad_scalar_tmp = (LIS_SCALAR *)lis_malloc( LIS_QUAD_SCALAR_SIZE*sizeof(LIS_SCALAR),"lis_initialize::lis_quad_scalar_tmp" );
    if( lis_quad_scalar_tmp==NULL )
    {
      LIS_SETERR_MEM(LIS_QUAD_SCALAR_SIZE*sizeof(LIS_SCALAR));
      return LIS_OUT_OF_MEMORY;
    }
    lis_quad_x87_fpu_init(&lis_x87_fpu_cw);
  #endif

  for(i=1;i<*argc;i++)
  {
    if( strncmp(argv[0][i], "-help", 5)==0 )
    {
/*      lis_display();*/
      CHKERR(1);
    }
    else if( strncmp(argv[0][i], "-ver", 4)==0 )
    {
      lis_version();
      CHKERR(1);
    }
  }

  LIS_DEBUG_FUNC_OUT;
  return LIS_SUCCESS;
}

#undef __FUNC__
#define __FUNC__ "lis_finalize"
LIS_INT lis_finalize(void)
{
  LIS_DEBUG_FUNC_IN;

  lis_precon_register_free();
  /*
  if( cmd_args ) lis_args_free(cmd_args);
  */
  if( cmd_args ) 
    {
      lis_args_free(cmd_args); 
      cmd_args = NULL;
    }
  #ifdef _OPENMP
    lis_free(lis_vec_tmp);
  #endif
  #ifdef USE_QUAD_PRECISION
    lis_free(lis_quad_scalar_tmp);
    lis_quad_x87_fpu_finalize(lis_x87_fpu_cw);
  #endif

  lis_free_all();
  
  #ifdef USE_MPI
    if (!lis_mpi_initialized) MPI_Finalize();
  #endif

  LIS_DEBUG_FUNC_OUT;

  return LIS_SUCCESS;
}

#undef __FUNC__
#define __FUNC__ "lis_text2args"
LIS_INT lis_text2args(char *text, LIS_ARGS *args)
{
  char buf[1024];
  char *p,*s1,*s2;
  LIS_INT  k1,k2,f;
  LIS_ARGS arg_top,arg;

  LIS_DEBUG_FUNC_IN;

  arg_top = (LIS_ARGS)lis_malloc(sizeof(struct LIS_ARGS_STRUCT),"lis_text2args::arg_top");
  arg_top->next = arg_top;
  arg_top->prev = arg_top;
  arg_top->arg1 = NULL;
  arg_top->arg2 = NULL;

  strcpy(buf,text);
  p   = buf;
  f   = LIS_TRUE;
  while( *p!='\0' && f )
  {
    while( *p==' ' || *p=='\t' || *p=='\n' || *p=='\r' )
    {
      p++;
    }
    s1 = p;
    while( *p!=' ' && *p!='\t' && *p!='\n' && *p!='\r' && *p!='\0' )
    {
      *p = (char)tolower(*p);
      p++;
    }
    if( *p=='\0' ) break;
    *p++ = '\0';
    while( *p==' ' && *p=='\t' && *p=='\n' && *p=='\r' )
    {
      p++;
    }
    s2 = p;
    while( *p!=' ' && *p!='\t' && *p!='\n' && *p!='\r' && *p!='\0' )
    {
      *p = (char)tolower(*p);
      p++;
    }
    if( *p=='\0' ) f = LIS_FALSE;
    *p++ = '\0';
    k1 = (LIS_INT)strlen(s1);
    k2 = (LIS_INT)strlen(s2);
    if( k1>0 && k2>0 )
    {
      arg             = (LIS_ARGS)lis_malloc(sizeof(struct LIS_ARGS_STRUCT),"lis_text2args::arg");
      arg->arg1       = (char *)lis_malloc((k1+1)*sizeof(char),"lis_text2args::arg->arg1");
      arg->arg2       = (char *)lis_malloc((k2+1)*sizeof(char),"lis_text2args::arg->arg2");
      arg->next       = arg_top;
      arg->prev       = arg_top->prev;
      arg->prev->next = arg;
      arg->next->prev = arg;
      strcpy(arg->arg1,s1);
      strcpy(arg->arg2,s2);
    }
  }

  *args = arg_top;

  LIS_DEBUG_FUNC_OUT;
  return LIS_SUCCESS;
}

#undef __FUNC__
#define __FUNC__ "lis_arg2args"
LIS_INT lis_arg2args(LIS_INT argc, char *argv[], LIS_ARGS *args)
{
  char *p;
  LIS_INT  i,k1,k2;
  LIS_ARGS arg_top,arg;

  LIS_DEBUG_FUNC_IN;

  arg_top = (LIS_ARGS)lis_malloc(sizeof(struct LIS_ARGS_STRUCT),"lis_arg2args::arg_top");
  arg_top->next = arg_top;
  arg_top->prev = arg_top;
  arg_top->arg1 = NULL;
  arg_top->arg2 = NULL;

  i = 1;
  while( i<argc )
  {
    if( argv[i][0]=='-' && (i+1)<argc )
    {
      k1              = (LIS_INT)strlen(argv[i]);
      k2              = (LIS_INT)strlen(argv[i+1]);
      arg             = (LIS_ARGS)lis_malloc(sizeof(struct LIS_ARGS_STRUCT),"lis_arg2args::arg");
      arg->arg1       = (char *)lis_malloc((k1+1)*sizeof(char),"lis_arg2args::arg->arg1");
      arg->arg2       = (char *)lis_malloc((k2+1)*sizeof(char),"lis_arg2args::arg->arg2");
      arg->next       = arg_top;
      arg->prev       = arg_top->prev;
      arg->prev->next = arg;
      arg->next->prev = arg;
      strcpy(arg->arg1,argv[i]);
      strcpy(arg->arg2,argv[i+1]);
      p = arg->arg1;
      while( *p!='\0' )
      {
        *p = (char)tolower(*p);
        p++;
      }
      p = arg->arg2;
      while( *p!='\0' )
      {
        *p = (char)tolower(*p);
        p++;
      }
      i += 2;
    }
    else
    {
      i++;
    }
  }

  *args = arg_top;
  
  LIS_DEBUG_FUNC_OUT;
  return LIS_SUCCESS;
}


#undef __FUNC__
#define __FUNC__ "lis_args_free"
LIS_INT lis_args_free(LIS_ARGS args)
{
  LIS_ARGS arg,t;

  LIS_DEBUG_FUNC_IN;

  arg = args->next;
  
  while( arg!=args )
  {
    t             = arg;
    arg           = arg->next;

    lis_free2(2,t->arg1,t->arg2);
    t->next->prev = t->prev;
    t->prev->next = t->next;
    lis_free(t);
  }
  if (args) lis_free(args);

  LIS_DEBUG_FUNC_OUT;
  return LIS_SUCCESS;
}


#undef __FUNC__
#define __FUNC__ "lis_ranges_create"
LIS_INT lis_ranges_create(LIS_Comm comm, LIS_INT *local_n, LIS_INT *global_n, LIS_INT **ranges, LIS_INT *is, LIS_INT *ie, LIS_INT *nprocs, LIS_INT *my_rank)
{
  #ifdef USE_MPI
    LIS_INT    i;
  #endif
  LIS_INT    *tranges;
  int             int_nprocs,int_my_rank;

  LIS_DEBUG_FUNC_IN;

  #ifdef USE_MPI
    MPI_Comm_size(comm,&int_nprocs);
    MPI_Comm_rank(comm,&int_my_rank);

    *nprocs=int_nprocs;
    *my_rank=int_my_rank;

    tranges = (LIS_INT *)lis_malloc( (*nprocs+1)*sizeof(LIS_INT),"lis_ranges_create::tranges" );
    if( tranges==NULL )
    {
      LIS_SETERR_MEM((*nprocs+1)*sizeof(LIS_INT));
      return LIS_OUT_OF_MEMORY;
    }
  #else
    *nprocs  = 1;
    *my_rank = 0;
    tranges  = NULL;
  #endif

  #ifdef USE_MPI
    MPI_Allreduce(local_n,&i,1,LIS_MPI_INT,MPI_SUM,comm);
    if( i==0 )
  #else
    if( *local_n==0 )
  #endif
  {
    #ifdef USE_MPI
      LIS_GET_ISIE(*my_rank,*nprocs,*global_n,*is,*ie);
      *local_n = *ie-*is;
      MPI_Allgather(ie,1,LIS_MPI_INT,&tranges[1],1,LIS_MPI_INT,comm);
      tranges[0] = 0;
    #else
      *local_n = *global_n;
      *is      = 0;
      *ie      = *global_n;
    #endif
  }
  else
  {
    #ifdef USE_MPI
      MPI_Allgather(local_n,1,LIS_MPI_INT,&tranges[1],1,LIS_MPI_INT,comm);
      tranges[0] = 0;
      for(i=0;i<*nprocs;i++)
      {
        tranges[i+1] += tranges[i];
      }
      *global_n = tranges[*nprocs];
      *is       = tranges[*my_rank];
      *ie       = tranges[*my_rank+1];
    #else
      *global_n = *local_n;
      *is       = 0;
      *ie       = *local_n;
    #endif
  }
  *ranges = tranges;

  LIS_DEBUG_FUNC_OUT;
  return LIS_SUCCESS;
}
