code-to-text.py

#!/usr/bin/python
#coding=utf8
import binascii, sys

if __name__=='__main__':
	if len(sys.argv)==3:
		file_i=sys.argv[1] # исходный файл
		file_o=sys.argv[2] # конечный файл
	else:
		print ('Не заданы файлы!')
		print ('Пример: '+sys.argv[0]+' file.bas file_a.bas')
		sys.exit(1)

def hex_text(hex):
	hex_to_text={
		'11':'0','12':'1','13':'2','14':'3','15':'4','16':'5','17':'6','18':'7','19':'8','1a':'9',
		'81':'END','82':'FOR','83':'NEXT','84':'DATA','85':'INPUT','86':'DIM','87':'READ','88':'LET','89':'GOTO',
		'90':'STOP','91':'PRINT','92':'CLEAR','93':'LIST','94':'NEW','95':'ON','96':'WAIT','97':'DEF','98':'POKE','99':'CONT',
		'8a':'RUN','8b':'IF','8c':'RESTORE','8d':'GOSUB','8e':'RETURN','8f':'REM','9a':'CSAVE','9b':'CLOAD','9c':'OUT','9d':'LPRINT','9e':'LLIST','9f':'CLS',
		'a0':'WIDTH','a1':'ELSE','a2':'TRON','a3':'TROFF','a4':'SWAP','a5':'ERASE','a6':'ERROR','a7':'RESUME','a8':'DELETE','a9':'AUTO',
		'aa':'RENUM','ab':'DEFSTR','ac':'DEFINT','ad':'DEFSNG','ae':'DEFDBL','af':'LINE',
		'b0':'OPEN','b1':'FIELD','b2':'GET','b3':'PUT','b4':'CLOSE','b5':'LOAD','b6':'MERGE','b7':'FILES','b8':'LSET','b9':'RSET',
		'ba':'SAVE','bb':'LFILES','bc':'CIRCLE','bd':'COLOR','be':'DRAW','bf':'PAINT',
		'c0':'BEEP','c1':'PLAY','c2':'PSET','c3':'PRESET','c4':'SOUND','c5':'SCREEN','c6':'VPOKE','c7':'SPRITE','c8':'VDP','c9':'BASE',
		'ca':'CALL','cb':'TIME','cc':'KEY','cd':'MAX','ce':'MOTOR','cf':'BLOAD',
		'd0':'BSAVE','d1':'DSKO$','d2':'SET','d3':'NAME','d4':'KILL','d5':'IPL','d6':'COPY','d7':'CMD','d8':'LOCATE','d9':'TO',
		'da':'THEN','db':'TAB','dc':'STEP','dd':'USR','de':'FN','df':'SPC',
		'e0':'NOT','e1':'ERL','e2':'ERR','e3':'STRING$','e4':'USING','e5':'INSTR','e7':'VARPTR','e8':'CRSLIN','e9':'ATTR$',
		'ea':'DSKI$','eb':'OFF','ec':'INKEY$','ed':'POINT',
		'ee':'>','ef':'=','f0':'<','f1':'+','f2':'-','f3':'*','f4':'/','f5':'^',
		'f6':'AND','f7':'OR','f8':'XOR','f9':'EQU','fa':'IMP',	'fb':'MOD',
		'fc':'\\' # Обратный слеш
	}
	if hex in hex_to_text:
		text=(hex_to_text[hex])
	else:
		# обработка отсутствия значения в словаре
		text='' 
	return text

def hex_text_ff (hex):
	# Таблица 2 (FF)
	hex_to_text_ff={
		'81':'LEFT$','82':'RIGHT$','83':'MID$','84':'SGN','85':'INT','86':'ABS','87':'SQR','88':'RND','89':'SIN',
		'8a':'LOG','8b':'EXP','8c':'COS','8d':'TAN','8e':'ATN','8f':'FRE',
		'90':'INP','91':'POS','92':'LEN','93':'STR$','94':'VAL','95':'ASC','96':'CHR$','97':'PEEK','98':'VPEEK','99':'SPACE$',
		'9a':'OCT$','9b':'HEX$','9c':'LPOS','9d':'BIN$','9e':'CINT','9f':'CSNG',
		'a0':'CDBL','a1':'FIX','a2':'STICK','a3':'STRIG','a4':'PDL','a5':'PAD','a6':'DSKF','a7':'FPOS','a8':'CVI','a9':'CVS',
		'aa':'CVD','ab':'EOF','ac':'LOC','ad':'LOF','ae':'MKI$','af':'MKS$',
		'b0':'MKD$'
	}
	if hex in hex_to_text_ff:
		text=(hex_to_text_ff[hex])
	else:
		# обработка отсутствия значения в словаре
		text=''
	return text

data_out=b''
file_in=open(file_i, 'rb')
data_in=file_in.read(1)
prefix_00=0     # 00 = Новая строка
prefix_ff=0     # FF = Таблица 2
prefix_0b=0     # 0B = Octal
prefix_0c=0     # 0C = Hex
prefix_1c=0     # 1C = Integer 256-32767
prefix_1d=0     # 1D = Single
prefix_1d_2=0   # 1D = Single (второй полубайт)
prefix_1f=0     # 1F = Double
prefix_1f_2=0   # 1F = Double (второй байт полностью)
prefix_1f_22=0  # 1F = Double (второй полубайт)
prefix_0e=0     # 0E = номер строки
prefix_0f=0     # 0F = Integer 10-255
prefix_22=0     # 22 = Кавычка (")
prefix_3a8fe6=0 # 3A 8F E6 = Комментарий (') 
prefix_rem=0    # 8F = Комментарий (REM)
line_end=binascii.unhexlify('0d'+'0a') # перевод строки 00 (0D 0D)
file_end=binascii.unhexlify('1a')      # конец файла 00 00 (1A)

while data_in:
	processed=0
	code_dec=ord(data_in)
	code_hex=(binascii.b2a_hex(data_in)).decode('ascii')
	code_bin=binascii.unhexlify(code_hex)
	code_hex_text=hex_text(code_hex)
	code_hex_text_ff=hex_text_ff(code_hex)

	# Разделитель операторов ELSE (3A A1)
	if prefix_3a8fe6==1 and code_hex=='a1':
		prefix_3a8fe6=0
	# Разделитель операторов (:) (3A)
	elif prefix_3a8fe6==1 and code_hex!='8f':
		data_out=data_out+':'.encode()
		prefix_3a8fe6=0
	# Первая строка (как 00)
	if code_hex=='ff' and data_out==b'':
		processed = 1
		prefix_00=1
	# Конец файла (00)
	elif code_hex=='00' and prefix_00==2 and prefix_0f==0 and prefix_0e==0 and prefix_1d==0 and prefix_1f==0:
		data_out=data_out+file_end
		processed=1
	# Конец строки (00)
	elif code_hex=='00' and prefix_00==0 and prefix_0f==0 and prefix_0e==0 and prefix_0b==0 and prefix_0c==0 and prefix_1d==0 and prefix_1f==0:
		data_out=data_out+line_end
		prefix_00=1
		prefix_22=0
		prefix_rem=0
		prefix_3a8fe6=0
		processed=1
	# Новая строка: младший байт (1) внутреннего номера строкм
	elif prefix_00==1:
		internal_string_number_2=code_hex
		prefix_00=2
		processed=1
	# Новая строка: старший байт (2) внутреннего номера строкм
	elif prefix_00==2:
		internal_string_number_1=code_hex
		prefix_00=3
		processed=1
	# Новая строка: младший байт (1) номера строкм
	elif prefix_00==3:
		string_number_2 = code_hex
		prefix_00=4
		processed=1
	# Новая строка: старший байт (2) номера строкм
	elif prefix_00==4:
		string_number_1=code_hex
		string_number=str(int(string_number_1+string_number_2,base=16))+' '
		prefix_00=0
		data_out=data_out+(string_number).encode()
		processed=1
	# Кавычки (22): префикс
	elif code_hex=='22':
		if prefix_22==0:
			prefix_22=1
		else:
			prefix_22=0
			prefix_3a8fe6=0
		data_out=data_out+binascii.unhexlify(code_hex)
		processed=1
	# Кавычки (22):
	elif prefix_22==1:
		data_out=data_out+binascii.unhexlify(code_hex)
		processed=1
	# Коментарий (3a8fe6) (e6)
	elif prefix_3a8fe6==3:
		data_out=data_out+binascii.unhexlify(code_hex)
	elif prefix_3a8fe6==2 and code_hex=='e6' and prefix_00==0 and prefix_22==0 and prefix_rem==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0:
		prefix_3a8fe6=3
		data_out = data_out+'\''.encode()
	# Коментарий (3a8fe6) (8f)
	elif prefix_3a8fe6==1 and code_hex=='8f' and prefix_00==0 and prefix_22==0 and prefix_rem==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0:
		prefix_3a8fe6=2
	# Коментарий (3a8fe6): префикс
	elif code_hex=='3a' and prefix_00==0 and prefix_22==0 and prefix_rem==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0:
		prefix_3a8fe6=1
	# REM (8f):
	elif prefix_rem==1:
		data_out=data_out + binascii.unhexlify(code_hex)
		processed=1
	# REM (8f): префикс
	elif code_hex=='8f':
		if prefix_rem==0:
			prefix_rem=1
			data_out=data_out + code_hex_text.encode()
	# Номер строки (0e)
	elif code_hex=='0e' and prefix_00==0 and prefix_ff==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0:
		prefix_0e=1
		processed=1
	# Номер строки (0e): младший байт (1) номера строкм
	elif prefix_0e==1:
		string_number_0e_2=code_hex
		prefix_0e=2
		processed=1
	# Номер строки (0e): старший байт (2) номера строкм
	elif prefix_0e==2:
		string_number_0e_1=code_hex
		string_number_0e=str(int(string_number_0e_1+string_number_0e_2,base=16))
		prefix_0e=0
		data_out=data_out+string_number_0e.encode()
		processed=1
	# Integer 1-255 (0f)
	elif prefix_0f==1:
		data_out=data_out+str(int(code_hex,base=16)).encode()
		prefix_0f=0
		processed=1
	# Integer 1-255 (0f): префикс
	elif code_hex=='0f':
		prefix_0f=1
		processed=1
	# Octal (0b): префикс
	elif code_hex=='0b' and prefix_00==0 and prefix_ff==0 and prefix_0f==0 and prefix_0c==0:
		prefix_0b=1
	# Octal (0b): младший байт (1)
	elif prefix_0b==1:
		octal_0b_2=code_hex
		prefix_0b=2
		processed=1
	# Octal (0b): старший байт (2)
	elif prefix_0b==2:
		octal_0b_1=code_hex
		prefix_0b=0
		if sys.version_info[0] < 3:
			# Python 2
			data_out=data_out+'&O'+str(int(oct(int(octal_0b_1+octal_0b_2,base=16))))
		else:
			# Python 3
			data_out=data_out+'&O'.encode()+(str(oct(int(octal_0b_1+octal_0b_2,base=16)))).replace('0o','').encode()
		processed=1
	# Hex (0c): префикс
	elif code_hex=='0c' and prefix_00==0 and prefix_ff==0 and prefix_0f==0 and prefix_0b==0 and prefix_1c==0:
		prefix_0c=1
	# Hex (0c): младший байт (1)
	elif prefix_0c==1:
		hex_0c_2=code_hex
		prefix_0c=2
		processed=1
	# Hex (0c): старший байт (2)
	elif prefix_0c==2:
		hex_0c_1=code_hex
		prefix_0c=0
		if int(hex_0c_1,base=16)<=15:
			# Убираем лидирующий ноль из старшего разряда
			hex_0c_1=str(hex_0c_1.replace('0',''))
		if int(hex_0c_2,base=16)<=15:
			# Убираем лидирующий ноль из младшего разряда
			hex_0c_2=str(hex_0c_2.replace('0',''))
		data_out=data_out+'&H'.encode()+ ( str(hex_0c_1+hex_0c_2).upper() ).replace('0o','').encode()
		processed=1
	# Integer (1c) 256-32767 (%): префикс
	elif code_hex=='1c' and prefix_00==0 and prefix_ff==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0:
		prefix_1c=1
	# Integer (1c) 256-32767 (%): младший байт (1)
	elif prefix_1c==1:
		int_1c_2=code_hex
		prefix_1c=2
		processed=1
	# Integer (1c) 256-32767 (%): старший байт (2)
	elif prefix_1c==2:
		int_1c_1=code_hex
		prefix_1c=0
		data_out=data_out + str(int(int(int_1c_1 + int_1c_2,base=16))).encode()
		processed=1
	# Single (1d) : префикс
	elif code_hex=='1d' and prefix_00==0 and prefix_ff==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0 and prefix_1c==0:
		prefix_1d=1
	# Single (1d) (1)
	elif prefix_1d==1:
		data_1d=''
		prefix_1d=2
		prefix_1d_2=((int(code_hex))-40)
		processed=1
	# Single (1d) (2)
	elif prefix_1d==2:
		data_1d=data_1d+code_hex
		prefix_1d=3
		processed=1
	# Single (1d) (3)
	elif prefix_1d==3:
		data_1d=data_1d+code_hex
		prefix_1d=4
		processed=1
	# Single (1d) (4)
	elif prefix_1d==4:
		data_1d=data_1d+code_hex
		if prefix_1d_2==6:
			data_out=data_out+(data_1d+'!').encode()
		else:
			data_out=data_out+((data_1d[0:prefix_1d_2]+'.'+data_1d[prefix_1d_2:])).encode()
		processed=1
		prefix_1d=0
		prefix_1d_2=0
	# Doudle (1F) : префикс
	elif code_hex=='1f' and prefix_00==0 and prefix_ff==0 and prefix_0f==0 and prefix_0b==0 and prefix_0c==0 and prefix_1c==0 and prefix_1d==0:
		prefix_1f=1
	# Doudle (1F) (1)
	elif prefix_1f==1:
		data_1f=''
		prefix_1f=2
		prefix_1f_22=int(code_hex[1:2],base=16)
		prefix_1f_2=int(code_hex,base=16)
		processed=1
	# Doudle (1F) (2)
	elif prefix_1f==2:
		data_1f=data_1f+code_hex
		prefix_1f=3
		processed=1
	# Doudle (1F) (3)
	elif prefix_1f==3:
		data_1f=data_1f+code_hex
		prefix_1f=4
		processed=1
	# Doudle (1F) (4)
	elif prefix_1f==4:
		data_1f=data_1f+code_hex
		prefix_1f=5
		processed=1
	# Doudle (1F) (5)
	elif prefix_1f==5:
		data_1f=data_1f+code_hex
		prefix_1f=6
		processed=1
	# Doudle (1F) (6)
	elif prefix_1f==6:
		data_1f=data_1f+code_hex
		prefix_1f=7
		processed=1
	# Doudle (1F) (7)
	elif prefix_1f==7:
		data_1f=data_1f+code_hex
		prefix_1f=8
		processed=1
	# Doudle (1F) (8)
	elif prefix_1f==8:
		data_1f=data_1f+code_hex
		if prefix_1f_22==14:
			data_out=data_out+(data_1f+'#').encode()
		else:
			# Если больше или равно 4F
			if prefix_1f_2 >= 79:
				# Ставим десятичную точку полсле первого разряда
				data_1f=data_1f[0:1]+'.'+data_1f[1:]
				# Добавляем степень
				data_out=data_out+((str(data_1f))+'E+').encode()+str(prefix_1f_2-65).encode()
			else:
				# Удаляем незначащие нули
				data_1f=((data_1f[0:prefix_1f_22]+'.'+data_1f[prefix_1f_22:])).rstrip('0').rstrip('.')
				data_out=data_out+((str(data_1f))+'#').encode()
		processed=1
		prefix_1f=0
		prefix_1f_22=0
		prefix_1f_2=0
	# Таблица 2 (ff) префикс
	elif code_hex=='ff' and prefix_ff==0 and prefix_0e==0 and prefix_0f==0:
		prefix_ff=1
		processed=1
	# Таблица 2 (ff) текст
	elif prefix_ff==1 and prefix_0e==0 and code_hex_text_ff!='' and prefix_0f==0:
		data_out=data_out+code_hex_text_ff.encode()
		prefix_ff=0
		processed=1
	# Таблица 1
	elif prefix_ff==0 and prefix_00==0 and prefix_0e==0 and code_hex_text!='' and prefix_0f==0:
		data_out=data_out+code_hex_text.encode()
		processed=1
	# Обычный текст
	elif code_hex_text=="" and code_hex_text_ff=="" and processed==0:
		data_out=data_out+binascii.unhexlify(code_hex)
		processed=1

	data_in=file_in.read(1)

file_out = open(file_o, 'wb')
file_out.write(data_out)

file_out.close()
file_in.close()