Awk script for generating a Game Boy SYM file from a RGBDS map file

map_to_sym.awk

#!/usr/bin/awk -f
/^[^ \t]+[ \t]bank #([0-9]+):$/ {
  bank = substr($3, 2)
  sub(/:/, "", bank)
}

/^[ \t]*\$[0-9A-Fa-f]{4}[ \t]+=[ \t]+/ {
  printf "%02x:%s %s\n", bank, substr($1, 2), $3
}