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135 lines
4.9 KiB
Python
135 lines
4.9 KiB
Python
# decompiler.py
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#
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# Copyright 2021 James Westman <james@jwestman.net>
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# This file is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# SPDX-License-Identifier: LGPL-3.0-or-later
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from enum import Enum
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from . import tokenizer
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OPENING_TOKENS = ["{", "["]
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CLOSING_TOKENS = ["}", "]"]
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NEWLINE_AFTER = [";"] + OPENING_TOKENS + CLOSING_TOKENS
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NO_WHITESPACE_BEFORE = [",", ":", ";", ")", "."]
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NO_WHITESPACE_AFTER = ["C_", "_", "("]
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WHITESPACE_AFTER = [":", ","]
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WHITESPACE_BEFORE = ["{"]
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class LineType(Enum):
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STATEMENT = 0
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BLOCK_OPEN = 1
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BLOCK_CLOSE = 2
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CHILD_TYPE = 3
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class Format:
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def format(data):
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indent_levels = 0
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tokens = tokenizer.tokenize(data)
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tokenized_str = ""
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last_not_whitespace = tokens[0]
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current_line = ""
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prev_line_type = None
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def commit_current_line(extra_newlines, line_type, new_indent_levels):
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nonlocal tokenized_str, current_line, prev_line_type
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current_line += "\n" + (new_indent_levels * " ")
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tokenized_str += (
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current_line
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if extra_newlines == 0
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else ("\n" * extra_newlines) + (" " * indent_levels) + current_line
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)
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current_line = ""
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prev_line_type = line_type
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for item in tokens:
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if item.type != tokenizer.TokenType.WHITESPACE:
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item_as_string = str(item)
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if (
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item_as_string in WHITESPACE_BEFORE
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and str(last_not_whitespace) not in NO_WHITESPACE_AFTER
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) or (
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(
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str(last_not_whitespace) in WHITESPACE_AFTER
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or last_not_whitespace.type == tokenizer.TokenType.IDENT
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)
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and str(last_not_whitespace) not in NO_WHITESPACE_AFTER
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and item_as_string not in NO_WHITESPACE_BEFORE
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):
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current_line += " "
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current_line += item_as_string
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if (
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item_as_string in NEWLINE_AFTER
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or item.type == tokenizer.TokenType.COMMENT
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):
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if item_as_string in OPENING_TOKENS:
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# num_newlines = 1 if prev_line_type == LineType.CHILD_TYPE else 2
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# prev_line_type = LineType.BLOCK_OPEN
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# tokenized_str = (
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# tokenized_str.strip()
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# + (num_newlines * "\n")
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# + (indent_levels * " ")
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# )
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# current_line += "\n" + (indent_levels * " ")
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# tokenized_str += current_line
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# current_line = ""
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commit_current_line(
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0 if prev_line_type == LineType.CHILD_TYPE else 1,
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LineType.BLOCK_OPEN,
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indent_levels + 1,
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)
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indent_levels += 1
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elif item_as_string in CLOSING_TOKENS:
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# tokenized_str = (
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# tokenized_str.strip() + "\n" + (indent_levels * " ")
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# )
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# current_line += "\n" + (indent_levels * " ")
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# tokenized_str += current_line
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# current_line = ""
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indent_levels -= 1
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commit_current_line(
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0,
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# LineType.CHILD_TYPE
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# if current_line.strip().startswith("[")
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# else LineType.BLOCK_CLOSE,
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LineType.BLOCK_CLOSE,
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indent_levels - 1,
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)
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# indent_levels -= 1
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# prev_line_type = (
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# LineType.CHILD_TYPE
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# if current_line.strip().startswith("[")
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# else LineType.BLOCK_CLOSE
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# )
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else:
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commit_current_line(0, prev_line_type, indent_levels)
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last_not_whitespace = item
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print(tokenized_str) # TODO: Remove this when the MR is ready to be merged
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return tokenized_str
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