ref: b17255fe3fe1466414fb69349345b956457441b0
dir: /tools/free_space.awk/
#!/usr/bin/gawk -f # Usage: tools/free_space.awk [BANK=<bank_spec>] pokecrystal.map # The BANK argument allows printing free space in one, all, or none of the ROM's banks. # Valid arguments are numbers (in decimal "42" or hexadecimal "0x2a"), "all" or "none". # If not specified, defaults to "none". # The `BANK` argument MUST be before the map file name, otherwise it has no effect! # Yes: tools/free_space.awk BANK=all pokecrystal.map # No: tools/free_space.awk pokecrystal.map BANK=42 # Copyright (c) 2020, Eldred Habert. # SPDX-License-Identifier: MIT BEGIN { nb_banks = 0 free = 0 rom_bank = 0 # Safety net for malformed files # Default settings # Variables assigned via the command-line (except through `-v`) are *after* `BEGIN` BANK="none" } # Only accept ROM banks, ignore everything else toupper($0) ~ /^[ \t]*ROM[0X][ \t]+BANK[ \t]+#/ { nb_banks++ rom_bank = 1 split($0, fields, /[ \t]/) bank_num = strtonum(substr(fields[3], 2)) } function register_bank(amount) { free += amount rom_bank = 0 # Reject upcoming banks by default if (BANK ~ /all/ || BANK == bank_num) { printf "Bank %3d: %5d/16384 (%.2f%%)\n", bank_num, amount, amount * 100 / 16384 } } rom_bank && toupper($0) ~ /^[ \t]*EMPTY/ { # Empty bank register_bank(16384) } rom_bank && toupper($0) ~ /^[ \t]*SLACK:[ \t]/ { if ($2 ~ /\$[0-9A-F]+/) { register_bank(strtonum("0x" substr($2, 2))) } else { printf "Malformed slack line? \"%s\" does not start with '$'\n", $2 } } END { # Determine number of banks, by rounding to upper power of 2 total_banks = 2 # Smallest size is 2 banks while (total_banks < nb_banks) { total_banks *= 2 } # RGBLINK omits "trailing" ROM banks, so fake them bank_num = nb_banks while (bank_num < total_banks) { register_bank(16384) bank_num++ } total = total_banks * 16384 printf "Free space: %5d/%5d (%.2f%%)\n", free, total, free * 100 / total }