#!/bin/ksh
# $Id: ins_m_prec 4931 2020-02-13 10:27:35Z jgipsl $
#---------------------------------------------------------------------
#- ins_m_prec - Installation of the precision module
#---------------------------------------------------------------------
function ins_m_prec_Usage
{
echo "
ins_m_prec install the precision module in IOIPSL/src

Usage :
  ${b_n} [-h] | [-v] [-i i_prec] [-r r_prec]

Options :
  -h        : help
  -v        : verbose mode
  -i i_prec : integer precision 4/8
  -r r_prec : real    precision 4/8

Defaults :
  -i 4 -r 8

Example for default precision :
  ins_m_prec

Example for INTEGER 4 and REAL 4 precision :
  ins_m_prec -i 4 -r 4
"
}
#-    dirname     and      basename
d_n=$(dirname ${0}); b_n=$(basename ${0});
#- Retrieving and validation of the options
x_v='silencious'; x_i=""; x_r="";
while getopts :hvi:r: V
  do
    case ${V} in
      (h)  ins_m_prec_Usage; exit 0;;
      (v)  x_v='verbose';;
      (i)  x_i=${OPTARG};;
      (r)  x_r=${OPTARG};;
      (:)  echo ${b_n}" : -"${OPTARG}" option : missing value" 1>&2;
           exit 2;;
      (\?) echo ${b_n}" : -"${OPTARG}" option : not supported" 1>&2;
           exit 2;;
    esac
  done
shift $(($OPTIND-1));
#-
# INTEGER and REAL precision
#-
case ${x_i} in
  ( 4 | 8 ) ;;
  ("") x_i='4';;
  (*)
    echo 'Invalid INTEGER precision requested' 1>&2;
    echo ${x_i}' (must be 4 or 8)' 1>&2;
    exit 1;;
esac
case ${x_r} in
  ( 4 | 8 ) ;;
  ("") x_r='8';;
  (*)
    echo 'Invalid REAL precision requested' 1>&2;
    echo ${x_r}' (must be 4 or 8)' 1>&2;
    exit 1;;
esac
#-
[[ ${x_v} = 'verbose' ]] && \
  { echo "\nInstallation of the precision module";
    echo '--- Integer precision  : '${x_i};
    echo '--- Real    precision  : '${x_r}; }
#-
dp_b='src/def.prec'
[[ ! -f "${dp_b}" ]] && { echo "${dp_b} unreachable ..."; exit 3; }
sed -e "s/i_std=i_?/i_std=i_${x_i}/" \
    -e "s/r_std=r_?/r_std=r_${x_r}/" ${dp_b} > wmpf.$$;
#-
# Create the module "defprec.f90" or update it
# if the default precision has been modified
#-
dp_p='src/defprec.f90';
diff -q wmpf.$$ ${dp_p} > /dev/null 2>&1; r_c=${?};
[[ ${r_c} != 0 ]] && cp -p wmpf.$$ ${dp_p};
[[ ${x_v} = 'verbose' ]] && \
 { echo " ";
  { [[ ${r_c} = 0 ]] && echo ${dp_p} 'already up to date'; } || \
  { [[ ${r_c} = 1 ]] && echo 'Update '${dp_p}; } || \
  { [[ ${r_c} = 2 ]] && echo 'Create '${dp_p}; }
  echo " "; }
#-
unset dp_b dp_p x_v x_i x_r; rm -f wmpf.$$;
#-
exit 0;
