mirror of
https://github.com/uffejakobsen/acme.git
synced 2024-11-29 04:49:20 +00:00
836227f9da
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@319 4df02467-bbd4-4a76-a152-e7ce94205b78
278 lines
8.3 KiB
Python
Executable File
278 lines
8.3 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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def line_preprocess(line):
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"split line into comment, strings and everything else"
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result = []
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part = ""
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comment = None
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quotes = None
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for char in line:
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# are we inside comment?
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if comment:
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comment += char
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continue
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# are we inside quotes?
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if quotes:
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part += char
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if char == quotes:
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# end of quotes
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# if previous part was also quoted, we have to combine them,
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# because "a""b" really means a"b
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if result and result[-1][-1] == quotes:
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part = result[-1][:-1] + "\\" + part
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result.pop()
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# use singlequotes for 1-char strings
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if len(part) == 3:
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part = "'" + part[1] + "'"
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# escape backslash, singlequote, doublequote
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if part == "'\\'":
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part = "'\\\\'"
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elif part == "'''":
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part = "'\\''"
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elif part == '"\\""':
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part = "'\"'"
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result.append(part) # move quoted string to result list
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part = ""
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quotes = None
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continue
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# not in quotes
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if char == '"' or char == "'":
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# new quotes, so finish old part
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if part and part != ' ':
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result.append(part)
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# ...and start new one
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part = char
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quotes = char
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continue
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# comment?
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if char == ';':
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# finish old part
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if part and part != ' ':
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result.append(part)
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part = ""
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# ...and start comment
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comment = char
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continue
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## tab-to-space:
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#if char == '\t':
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# char = ' '
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# skip blanks after blank
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if part.endswith(' ') and char == ' ':
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pass
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else:
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# all other characters:
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part += char
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# quotes still open at end of line?
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if quotes:
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raise Exception("Unterminated string constant in input data")
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# append last part
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if part:
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result.append(part)
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return result, comment
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def single_out(items, substring):
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"split any item containing substring into first part, substring, second part. empty parts are dropped."
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result = []
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for i in items:
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while substring in i:
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parts = i.partition(substring)
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if parts[0]:
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result.append(parts[0])
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result.append(substring)
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i = parts[2]
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if i:
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result.append(i)
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return result
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def unquoted_tokenize(part):
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"split part into tokens (so do not pass string literals!)"
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# split at spaces (and throw away all spaces)
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items = part.split()
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# split at commas, braces, ...
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items = single_out(items, ',')
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items = single_out(items, '/')
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items = single_out(items, '=')
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items = single_out(items, '+')
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items = single_out(items, '-')
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items = single_out(items, '*')
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return items
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opcodes_to_keep = [
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# std 6502:
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"brk", "rti", "rts", "nop",
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"php", "plp", "pha", "pla",
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"bpl", "bmi", "bvc", "bvs", "bcc", "bcs", "bne", "beq",
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"clc", "sec", "cli", "sei", "clv", "cld", "sed",
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"dex", "dey", "inx", "iny",
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"tax", "tay", "txa", "tya", "tsx", "txs",
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# new in 65c02:
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"phx", "plx", "phy", "ply", "bra" # inc, dec
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]
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opcodes_with_arg = [
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# std 6502:
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"ora", "and", "eor", "adc", "sta", "lda", "cmp", "sbc",
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"asl", "rol", "lsr", "ror", "dec", "inc",
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"ldx", "stx", "cpx", "ldy", "sty", "cpy",
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"jsr", "jmp", "bit",
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# new in 65c02:
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"tsb", "trb", "stz"
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]
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token_substitutions = {
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".": "*", # program counter
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":not:": "not", # operator
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":eor:": "xor", # operator
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":msb:": ">", # operator?
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}
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opcodes_to_replace = {
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"org": "*=",
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"cpu": ";!cpu", # TODO: support properly!
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"=": "!tx",
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"$": "!wo", # actually & instead of $, but substitution was done earlier
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"end": "!eof",
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"assert": "+assert",
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"lnk": ";!source", # TODO: support properly!
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"asla": "\tasl",
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"lsra": "\tlsr",
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"rola": "\trol",
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"rora": "\tror",
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"dea": "\tdec", # 65c02
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"ina": "\tinc", # 65c02
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}
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opcodes_to_rename = {
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"clr": "stz" # 65c02
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}
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def convert_opcodes(parts):
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"convert mnemonics and pseudo opcodes"
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if not parts:
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return parts
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op = parts[0]
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parts = parts[1:]
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if op in opcodes_to_keep:
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return ["\t" + op] + parts
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if op in opcodes_to_replace:
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return [opcodes_to_replace[op]] + parts
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# wtf?!
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if op == "jmi":
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op = "jmpi"
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elif op == "jmix":
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op = "jmpxi"
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# convert addressing modes
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if len(op) > 3:
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oldop = op
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am = op[3:]
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op = op[:3]
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if am == "im":
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if parts[0] == '/':
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parts[0] = "#>"
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elif parts[0][0] >= 'a' and parts[0][0] <= 'z':
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parts[0] = "#< " + parts[0]
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else:
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parts[0] = "#" + parts[0]
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elif am == "ax" or am == "zx":
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parts[-1] = parts[-1] + ", x"
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elif am == "ay" or am == "zy":
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parts[-1] = parts[-1] + ", y"
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elif am == "xi":
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parts[0] = "(" + parts[0]
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parts[-1] = parts[-1] + ", x)"
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elif am == "iy":
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parts[0] = "(" + parts[0]
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parts[-1] = parts[-1] + "), y"
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elif am == "i":
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parts[0] = "(" + parts[0]
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parts[-1] = parts[-1] + ")"
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else:
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op = oldop
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# convert
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if op in opcodes_to_rename:
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op = opcodes_to_rename[op]
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if op in opcodes_with_arg:
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return ["\t" + op] + parts
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return [op] + parts
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def process_code(parts):
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"split code parts at special characters"
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prefix = ""
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# remember if line starts with space
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indented = (parts[0][0] == " ")
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# because now spaces are dropped
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result = []
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for part in parts:
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# do not process quoted strings any further
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if part.startswith("'") or part.startswith('"'):
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result.append(part)
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continue
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# convert to lower case
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part = part.lower()
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# substitute: & becomes $
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part = "$".join(part.split("&"))
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# all other parts are split up into tokens
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result.extend(unquoted_tokenize(part))
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# convert some tokens (string literals are not in danger, as they include quotes)
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parts = result
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result = []
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for part in parts:
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if part in token_substitutions:
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part = token_substitutions[part]
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result.append(part)
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# now convert
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label = ""
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if indented:
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# code
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result = convert_opcodes(result)
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else:
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# label or symbol definition
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if len(result) > 1 and result[1] == "*":
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# symbol definition
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symdef = result[0] + "\t="
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result = [symdef] + convert_opcodes(result[2:])
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else:
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# label
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label = result[0]
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result = convert_opcodes(result[1:])
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if result:
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label = label + "\t"
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return label, result
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def process_line(line):
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"process a single line of input and return converted version"
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# remove line ending, if there is one. don't care if NL or CR or combination
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while len(line) != 0 and (line[-1] == "\r" or line[-1] == "\n"):
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line = line[:-1]
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# step 1: split into strings, comments and everything else
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codeparts, comment = line_preprocess(line)
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# step 2: if there is anything before comment, process that
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if codeparts:
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prefix, codeparts = process_code(codeparts)
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# reassemble line
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line = prefix + " ".join(codeparts)
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else:
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line = ""
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if comment:
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line = line + comment
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return line + "\n"
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def convert_file(input, output):
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"convert input file to output file line-by-line"
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with open(input, "rt") as infile:
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with open(output, "wt") as outfile:
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outfile.write(";ACME 0.97\n")
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for line in infile:
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outfile.write(process_line(line))
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if __name__ == '__main__':
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if len(sys.argv) != 3:
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sys.exit(
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"Error: wrong number of arguments\n"
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"\n"
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"masm2acme.py converts a file from MASM to ACME syntax.\n"
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"Usage: masm2acme.py INPUTFILE OUTPUTFILE\n"
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)
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convert_file(sys.argv[1], sys.argv[2])
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