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#!/usr/bin/python
#author: Bryan Bishop <kanzure@gmail.com>
#date: 2012-01-06
#analyze texts, how many commands are unknown?
import extract_maps
from pretty_map_headers import map_name_cleaner
from operator import itemgetter
debug = False #set to True to increase logging output
#how many times is each command byte called?
totals = {}
total_text_commands = 0
should_be_total = 0
def get_text_pointer(texts_pointer, text_id):
if type(texts_pointer) == str: texts_pointer = int(texts_pointer, 16)
if type(text_id) == str: text_id = int(text_id)
byte1 = ord(extract_maps.rom[texts_pointer + (2*text_id)])
byte2 = ord(extract_maps.rom[texts_pointer + (2*text_id) + 1])
pointer = (byte1 + (byte2 << 8))
return pointer
def how_many_until(byte, starting):
index = extract_maps.rom.find(byte, starting)
return index-starting
def print_command_debug_info(command_byte, text_id, text_pointer, map_id):
if debug:
print "byte is " + str(command_byte) + " on text #" + str(text_id) + " at " + hex(text_pointer) + " on map " + str(map_id) + " (" + extract_maps.map_headers[map_id]["name"] + ")"
def parse_text_script(text_pointer, text_id, map_id):
global total_text_commands
offset = text_pointer
commands = {}
command_counter = 0
end = False
while not end:
command = {}
command_byte = ord(extract_maps.rom[offset])
if command_byte == 0:
print_command_debug_info(command_byte, text_id, text_pointer, map_id)
#read until $57
jump = how_many_until(str(57), offset)
end_address = offset + jump
command = {"type": command_byte,
"start_address": offset,
"end_address": end_address,
"size": jump,
}
offset += end_address + 1
if not 0x0 in totals.keys(): totals[0x0] = 1
else: totals[0x0] += 1
end = True
elif command_byte == 0x17:
print_command_debug_info(command_byte, text_id, text_pointer, map_id)
#TX_FAR [pointer][bank]
pointer_byte1 = ord(extract_maps.rom[offset+1])
pointer_byte2 = ord(extract_maps.rom[offset+2])
pointer_bank = ord(extract_maps.rom[offset+3])
pointer = (pointer_byte1 + (pointer_byte2 << 8))
pointer = extract_maps.calculate_pointer(pointer, pointer_bank)
command = {"type": command_byte,
"start_address": offset,
"end_address": offset + 3,
"pointer": pointer,
}
offset += 3
if not 0x17 in totals.keys(): totals[0x17] = 1
else: totals[0x17] += 1
end = True
else:
if not command_byte in totals.keys(): totals[command_byte] = 1
else: totals[command_byte] += 1
end = True
commands[command_counter] = command
command_counter += 1
total_text_commands += len(commands)
return commands
def analyze_texts():
global should_be_total
texts = {}
for map_id in extract_maps.map_headers:
if map_id in extract_maps.bad_maps: continue #skip
map2 = extract_maps.map_headers[map_id]
map2["texts"] = {}
referenced_texts = map2["referenced_texts"]
should_be_total += len(referenced_texts)
texts_pointer = int(map2["texts_pointer"], 16)
#print "Checking texts on... map_id=" + str(map_id) + " and len(referenced_texts)=" + str(len(referenced_texts))
for text_id in referenced_texts:
#print "Working on map id=" + str(map2["id"]) + " and text id=" + str(text_id)
text_pointer = get_text_pointer(texts_pointer, text_id)
text_pointer = extract_maps.calculate_pointer(text_pointer, int(map2["bank"], 16))
commands = parse_text_script(text_pointer, text_id, map_id)
map2["texts"][text_id] = commands
texts[map_id] = map2["texts"]
extract_maps.map_headers[map_id]["texts"] = map2["texts"]
return texts
if __name__ == "__main__":
extract_maps.load_rom()
extract_maps.load_map_pointers()
extract_maps.read_all_map_headers()
print analyze_texts()
print "\n\n---- stats ----\n\n"
popular_text_commands = sorted(totals.iteritems(), key=itemgetter(1), reverse=True)
#convert the first values (command byte) to hex
for popular_item in popular_text_commands:
print hex(popular_item[0]) + " was used " + str(popular_item[1]) + " times."
#print "popular text commands: " + str(popular_text_commands)
print "total text commands: " + str(total_text_commands)
print "total text scripts: " + str(should_be_total)
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