#!@SHELL@
#
# The standard driver for SML/NJ under the new runtime system
#

CMD=`basename $0`

#
# for /bin/ksh, disable reading user's environment file
#
unset ENV

#############################################################################
#
# BEGIN SITE SPECIFIC STUFF
#
#############################################################################

#
# SITE SPECIFIC CONFIGURATION INFO
#

# the path of the directory in which executables (like this file) are kept.
BIN_DIR=@BINDIR@
if [ ! -d "$BIN_DIR" ]; then
    cmddir=`dirname $0`
    case "$cmddir" in
    	/* ) BIN_DIR="$cmddir";;
    	* ) BIN_DIR=`cd $cmddir; pwd` ;;
    esac
fi

# the path of the directory in which the runtime system executables are kept.
RUN_DIR=$BIN_DIR/.run

# the path of the directory in which the heap images are kept.
HEAP_DIR=$BIN_DIR/.heap

#
# the following could be replaced with some site specific code
#
ARCH_N_OPSYS=`$BIN_DIR/.arch-n-opsys`
if [ "$?" != "0" ]; then
  echo "$CMD: unable to determine architecture/operating system"
  exit 1
fi
eval $ARCH_N_OPSYS

#############################################################################
#
# END SITE SPECIFIC STUFF
#
#############################################################################

# special shortcut for frequent use (and for Linux' binfmt)
case "$1" in /* | ./* | ../* ) HEAP="@SMLload=$1"; shift ;; esac

ALLOC=""

#
# Process command line arguments
#
ARGS=""
while [ "$#" != "0" ]; do
  arg=$1; shift
  case $arg in
    @SMLrun=*)
      RUN=`echo $arg | sed 's/@SMLrun=//'`
      ;;
    @SMLload=*)
      HEAP=$arg;
      ;;
    @SMLappl)
      if [ "$#" = "0" ]; then
        echo "$CMD: missing argument for @SMLappl option"
        exit 1
      fi
      APPL=$1; shift
      ;;
    @SMLversion)
      echo "$CMD @VERSION@"
      exit 0
      ;;
    @SMLalloc=*)
      ALLOC=$arg
      ;;
    *)
      ARGS="$ARGS $arg"
      ;;
  esac
done

#
# Try to figure out the CPU's cache size and set the allocation area
# size accordingly.  This is majorly important for Celeron systems
# which suffer badly when the allocation area is too big.
#
if [ "$ALLOC" = "" ] ; then
    if [ -f /proc/cpuinfo ] ; then
	# "head" is called to make sure we consider only one matching line.
	# (On linux SMP systems there is more than one such line.)
	cache=`fgrep 'cache size' </proc/cpuinfo | head -1`
	if [ $? = 0 ] ; then
	    kb=`echo $cache | sed -e 's/^[^0-9]*\([0-9]*\).*$/\1/'`
	    case $kb in 
		128)
		    # This is the Celeron case.
		    ALLOC="@SMLalloc=32k"
		    ;;
		256)
		    # Do CPUs like this exist?
		    ALLOC="@SMLalloc=128k"
		    ;;
		512)
		    # The Pentium II case...
		    ALLOC="@SMLalloc=256k"
		    ;;
		*)
		    ;;
	    esac
	fi
    fi
fi

if [ "$RUN" = "" ]; then
  #
  # Construct the runtime system path from the ARCH and OS
  #
  RUN="$RUN_DIR/run.$ARCH-$OPSYS"
  if [ ! -x "$RUN" ]; then
    if [ "$ALT_OPSYS" = "" ]; then
      echo "$CMD: cannot find runtime system $RUN"
      exit 1
    else
      RUN="$RUN_DIR/run.$ARCH-$ALT_OPSYS"
      if [ ! -x "$RUN" ]; then
	echo "$CMD: cannot find runtime system $RUN"
	exit 1
      fi
    fi
  fi
fi

if [ "$HEAP" = "" ]; then
  #
  # Construct the heap image path from the APPL and ARCH
  #
  if [ "$APPL" = "" ]; then
    APPL=$CMD
  fi
  HEAP="@SMLload=$HEAP_DIR/$APPL"
fi

#
# run the sucker!
#
exec $RUN @SMLcmdname=$0 $HEAP $ALLOC $ARGS