checksize.sh

#!/bin/bash
#
# Check SDCC map files and calculate how much RAM you have left
#
# max_mem is top mem minus your code start, for example: 41179
#

set -e

if [ $# -ne 2 ]; then
	echo "$0 max_mem filename.map"
	exit 1
fi

CURRENT=`egrep -u "^_" < $2 | sort -u | awk ' BEGIN { t=0 } /^_/ && /bytes/ { t = t + strtonum($5) } END { print t }'`
LEFT=$(($1 - $CURRENT))

cat <<ENDL
***
    Max: $1 bytes
Current: $CURRENT bytes ($2)
   Left: $LEFT bytes
***
ENDL

exit 0