mirror of
https://gitlab.com/xCrystal/pokecrystal-board.git
synced 2024-09-09 09:51:34 -07:00
71 lines
1.9 KiB
Awk
Executable File
71 lines
1.9 KiB
Awk
Executable File
#!/usr/bin/gawk -f
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# Usage: tools/free_space.awk [BANK=<bank_spec>] pokecrystal.map
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# The BANK argument allows printing free space in one, all, or none of the ROM's banks.
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# Valid arguments are numbers (in decimal "42" or hexadecimal "0x2a"), "all" or "none".
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# If not specified, defaults to "none".
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# The `BANK` argument MUST be before the map file name, otherwise it has no effect!
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# Yes: tools/free_space.awk BANK=all pokecrystal.map
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# No: tools/free_space.awk pokecrystal.map BANK=42
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# Copyright (c) 2020, Eldred Habert.
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# SPDX-License-Identifier: MIT
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BEGIN {
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nb_banks = 0
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free = 0
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rom_bank = 0 # Safety net for malformed files
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# Default settings
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# Variables assigned via the command-line (except through `-v`) are *after* `BEGIN`
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BANK="none"
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}
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# Only accept ROM banks, ignore everything else
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toupper($0) ~ /^[ \t]*ROM[0X][ \t]+BANK[ \t]+#/ {
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nb_banks++
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rom_bank = 1
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split($0, fields, /[ \t]/)
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bank_num = strtonum(substr(fields[3], 2))
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}
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function register_bank(amount) {
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free += amount
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rom_bank = 0 # Reject upcoming banks by default
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if (BANK ~ /all/ || BANK == bank_num) {
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printf "Bank %3d: %5d/16384 (%.2f%%)\n", bank_num, amount, amount * 100 / 16384
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}
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}
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rom_bank && toupper($0) ~ /^[ \t]*EMPTY$/ {
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# Empty bank
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register_bank(16384)
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}
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rom_bank && toupper($0) ~ /^[ \t]*SLACK:[ \t]/ {
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if ($2 ~ /\$[0-9A-F]+/) {
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register_bank(strtonum("0x" substr($2, 2)))
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} else {
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printf "Malformed slack line? \"%s\" does not start with '$'\n", $2
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}
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}
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END {
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# Determine number of banks, by rounding to upper power of 2
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total_banks = 2 # Smallest size is 2 banks
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while (total_banks < nb_banks) {
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total_banks *= 2
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}
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# RGBLINK omits "trailing" ROM banks, so fake them
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bank_num = nb_banks
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while (bank_num < total_banks) {
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register_bank(16384)
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bank_num++
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}
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total = total_banks * 16384
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printf "Free space: %5d/%5d (%.2f%%)\n", free, total, free * 100 / total
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}
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