#!/bin/sh
#
#-----------------------------------------------------------------------
# initialize procedure parameters
#-----------------------------------------------------------------------
#
input=
npmpi=1
npomp=1
export OMP_NUM_THREADS=1
#
#-----------------------------------------------------------------------
# read procedure parameters from run call
#-----------------------------------------------------------------------
#
while [ $# -ge 2 ]
do
   case $1 in
      -input) input=`basename $2 .swn`;;
      -omp)   npomp=$2;;
      -mpi)   npmpi=$2;;
      *)      echo unknown parameter: $1
              echo ' Usage: swanrun -input file [-omp n | -mpi n]'
              echo
              exit ;;
   esac
   shift 2
done
#
#-----------------------------------------------------------------------
# if input file is not given, produce error
#-----------------------------------------------------------------------
#
if [ -z "$input" ]; then
   echo
   echo '***ERROR: no name SWAN input file given!'
   echo
   echo ' Usage: swanrun -input file [-omp n | -mpi n]'
   echo
   exit 1
fi
#
#-----------------------------------------------------------------------
# check whether MPI is available in case of parallel MPI run
#-----------------------------------------------------------------------
#
IFS="${IFS= 	}"; IFS="${IFS}:"
for dir in $PATH; do
    test -z "$dir" && dir=.
    if test -f $dir/mpirun; then
       mpi=1
       break
    fi
done
if [ $npmpi -gt 1 -a -z "$mpi" ]; then
   echo
   echo "***ERROR: MPI is not available!"
   echo
   exit 1
fi
#
#-----------------------------------------------------------------------
# check whether machinefile is available (if necessary)
#-----------------------------------------------------------------------
#
# Note: no machinefile is needed on small multi-core shared-memory Linux machine or on SGI platform
#
os=`uname -s`
if [ "$os" = Linux ]; then
   ncore=`grep -ic ^processor /proc/cpuinfo`
   if [ $ncore -le 8 ]; then
      nmf=1
   fi
fi
os=`echo $os | tr "[a-z]" "[A-Z]" | awk '{print substr($0,1,4)}'`
if [ "$os" = IRIX ]; then
   nmf=1
fi
if [ $npmpi -gt 1 -a ! -z "$mpi" -a -z "$nmf" ]; then
   if [ ! -f machinefile -a ! -h machinefile ]; then
      echo
      echo "***ERROR: no machinefile is present in current directory!"
      echo
      exit 1
   fi
fi
#
#-----------------------------------------------------------------------
# run SWAN
#-----------------------------------------------------------------------
#
#  adapt PATH to ensure a locally present executable is executed
PATH=.:$PATH

type swan.exe
if [ -r $input.swn ]; then
   orig=n
   cp $input.swn INPUT
   if [ $npomp -gt 1 ]; then
      export OMP_NUM_THREADS=$npomp
      swan.exe
   elif [ $npmpi -gt 1 -o ! -z "$mpi" ]; then
      if [ ! -f swan.exe ]; then
         ln -s `which swan.exe` swan.exe
         orig=y
      fi
      if [ -z "$nmf" ]; then
         if [ $npmpi -gt 1 ]; then
            mpirun -np $npmpi -machinefile machinefile swan.exe
         else
            swan.exe
         fi
      else
         mpirun -np $npmpi swan.exe
      fi
   else
      swan.exe
   fi
   if [ $npmpi -gt 1 ]; then
      inode=0
      while [ $inode -lt $npmpi ]; do
         inode=`expr $inode + 1`
         inode=`echo $inode | awk '{ printf "%03.0f", $0 }'`
         if [ -f PRINT-$inode ]; then
            mv PRINT-$inode $input.prt-$inode
         fi
         if [ -r Errfile-$inode ]; then
            mv Errfile-$inode $input.erf-$inode
         fi
      done
   else
      if [ -f PRINT ]; then
         mv PRINT $input.prt
      fi
      if [ -r Errfile ]; then
         mv Errfile $input.erf
      fi
   fi
   if [ -r ERRPTS ]; then
      mv ERRPTS $input.erp
   fi
   if [ -f norm_end ]; then
     cat norm_end
   fi
   if [ -h swan.exe -a "$orig" = y ]; then
      rm -f swan.exe
   fi
   rm -f INPUT
else
   echo "file $input.swn does not exist"
   exit 1
fi
#