findsymbols

#!/usr/bin/env bash

#Help message
usage () {
	echo "Usage: findsymbols file [-p prefix] symbol ..."
	echo "  file:"
	echo "    Symbol file created with the -Ln option in ld65"
	echo "  -p prefix:"
	echo "    A prefix added to all returned symbol names"
	echo "  symbol:"
	echo "    Name of one or more symbols"

	exit 1
}

#Validate input
if [ $# -lt 2 ]; then
	usage
fi

if [[ ! -f $1 ]]; then
	echo "File not found"
	usage
fi

#Get symbol names from command line parameters
args=($@)
unset args[0]		#Delete file

#Look for optional prefix
prefix=""
prefixFound=0
index=$#

while [ $index -gt 0 ]; do
	index=$(($index-1))
	if [[ ${args[$index]} == "-p" ]]; then
		prefixFound=1
		unset args[$(($index+1))]
		unset args[$index]
	elif [ $prefixFound -eq 0 ]; then
		prefix=${args[$index]}
	fi
done

if [ $prefixFound -eq 0 ]; then
	prefix=""
fi

#Parse file with awk
cat $1 |
awk -v prefix=$prefix -v args="$(IFS=:;echo "${args[*]}")" '
BEGIN {
	split(args, symbols, ":");
}
{
	for (s in symbols) {
		if (symbols[s] == substr($3,2)) {
			output[symbols[s]] = "$" substr($2,3)
		}
	}
}
END {
	for (s in output) {
		printf "-D " prefix s "=" output[s] " ";
	}
	printf("\n");
}
'
exit 0