#! /bin/sh
#
# Part of gforth package for OpenWrt: update Gforth pre-compiled interpreter
# image from installed sources
#
# Copyright (C) 2010 David Kuehling <dvdkhlng TA gmx TOD de> 
#
# License: GPLv3+, NO WARRANTY
#

# Rationale for choice of stack sizes, see Gforth Manual chapter 13.6
FORTHSIZES="--dictionary-size=1M \
	--data-stack-size=16k \
	--fp-stack-size=15872 \
	--return-stack-size=15360 \
	--locals-stack-size=14848"

STARTUP="exboot.fs startup.fs @asm_fs@ @disasm_fs@"

FORTHKFLAGS="--die-on-signal -i @kernel_fi@"

GFORTH_SHARE_DIR=/usr/share/gforth/@PACKAGE_VERSION@
GFORTH_LIB_DIR=/usr/lib/gforth/@PACKAGE_VERSION@
GFORTH_BIN_DIR=/usr/bin

GFORTH_FI=${GFORTH_LIB_DIR}/gforth.fi

echo "Creating Gforth interpreter image..."

mkdir -p $GFORTH_LIB_DIR

check_writable(){
    if [ -f $GFORTH_FI ] && ! [ -w $GFORTH_FI ]; then
	return 1
    elif ! [ -w $GFORTH_LIB_DIR ]; then
	return 1
    fi

    return 0
}

if ! check_writable; then
    cat <<EOF
  You do not have permissions to  create/modify the
  image file:
    $GFORTH_FI

  Are you not root?
EOF
    exec false
fi

export libccdir=${GFORTH_LIB_DIR}/libcc-named
export GFORTH="/usr/bin/gforth.real ${FORTHSIZES} ${FORTHKFLAGS} ${STARTUP}"
gforthmi ${GFORTH_FI}.new ${FORTHSIZES} ${FORTHKFLAGS} ${STARTUP} &&
mv -f ${GFORTH_FI}.new ${GFORTH_FI}
exit $?