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#!/usr/bin/env python3
#
# american fuzzy lop++ - custom code formatter
# --------------------------------------------
#
# Written and maintained by Andrea Fioraldi <andreafioraldi@gmail.com>
#
# Copyright 2015, 2016, 2017 Google Inc. All rights reserved.
# Copyright 2019-2023 AFLplusplus Project. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
import subprocess
import sys
import os
# import re # TODO: for future use
import shutil
import importlib.metadata
import hashlib
# string_re = re.compile('(\\"(\\\\.|[^"\\\\])*\\")') # TODO: for future use
CURRENT_LLVM = os.getenv('LLVM_VERSION', 18)
CLANG_FORMAT_BIN = os.getenv("CLANG_FORMAT_BIN", "")
FORMAT_CACHE_DIR = '.format-cache'
os.makedirs(FORMAT_CACHE_DIR, exist_ok=True)
def check_clang_format_pip_version():
"""
Check if the correct version of clang-format is installed via pip.
Returns:
bool: True if the correct version of clang-format is installed,
False otherwise.
"""
# Check if clang-format is installed
if importlib.util.find_spec('clang_format'):
# Check if the installed version is the expected LLVM version
if importlib.metadata.version('clang-format')\
.startswith(str(CURRENT_LLVM)+'.'):
return True
else:
# Return False, because the clang-format version does not match
return False
else:
# If the 'clang_format' package isn't installed, return False
return False
with open(".clang-format") as f:
fmt = f.read()
CLANG_FORMAT_PIP = check_clang_format_pip_version()
if shutil.which(CLANG_FORMAT_BIN) is None:
CLANG_FORMAT_BIN = f"clang-format-{CURRENT_LLVM}"
if shutil.which(CLANG_FORMAT_BIN) is None \
and CLANG_FORMAT_PIP is False:
print(f"[!] clang-format-{CURRENT_LLVM} is needed. Aborted.")
print(f"Run `pip3 install \"clang-format=={CURRENT_LLVM}.*\"` \
to install via pip.")
exit(1)
if CLANG_FORMAT_PIP:
CLANG_FORMAT_BIN = shutil.which("clang-format")
CLANG_FORMAT_VERSION = subprocess.check_output([CLANG_FORMAT_BIN, '--version'])
COLUMN_LIMIT = 80
for line in fmt.split("\n"):
line = line.split(":")
if line[0].strip() == "ColumnLimit":
COLUMN_LIMIT = int(line[1].strip())
def custom_format(filename):
p = subprocess.Popen([CLANG_FORMAT_BIN, filename], stdout=subprocess.PIPE)
src, _ = p.communicate()
src = str(src, "utf-8")
in_define = False
last_line = None
out = ""
for line in src.split("\n"):
define_start = False
if line.lstrip().startswith("#"):
if line[line.find("#") + 1:].lstrip().startswith("define"):
define_start = True
if (
"/*" in line
and not line.strip().startswith("/*")
and line.endswith("*/")
and len(line) < (COLUMN_LIMIT - 2)
):
cmt_start = line.rfind("/*")
line = (
line[:cmt_start]
+ " " * (COLUMN_LIMIT - 2 - len(line))
+ line[cmt_start:]
)
define_padding = 0
if last_line is not None and in_define and last_line.endswith("\\"):
last_line = last_line[:-1]
define_padding = max(0, len(last_line[last_line.rfind("\n") + 1:]))
if (
last_line is not None
and last_line.strip().endswith("{")
and line.strip() != ""
):
line = (" " * define_padding + "\\" if in_define else "") + "\n" + line
elif (
last_line is not None
and last_line.strip().startswith("}")
and line.strip() != ""
):
line = (" " * define_padding + "\\" if in_define else "") + "\n" + line
elif (
line.strip().startswith("}")
and last_line is not None
and last_line.strip() != ""
):
line = (" " * define_padding + "\\" if in_define else "") + "\n" + line
in_define = (define_start or in_define) and line.endswith("\\")
out += line + "\n"
last_line = line
return out
def hash_code_and_formatter(code):
hasher = hashlib.sha256()
hasher.update(code.encode())
hasher.update(CLANG_FORMAT_VERSION)
with open(__file__, 'rb') as f:
hasher.update(f.read())
return hasher.hexdigest()
def custom_format_cached(filename):
filename_hash = hashlib.sha256(filename.encode()).hexdigest()
cache_file = os.path.join(FORMAT_CACHE_DIR, filename_hash)
if os.path.exists(cache_file):
with open(filename) as f:
code = f.read()
code_hash = hash_code_and_formatter(code)
with open(cache_file) as f:
if f.read() == code_hash:
return code
code = custom_format(filename)
code_hash = hash_code_and_formatter(code)
with open(cache_file, 'w') as f:
f.write(code_hash)
return code
args = sys.argv[1:]
if len(args) == 0:
print("Usage: ./format.py [-i] <filename>")
print()
print(" The -i option, if specified, let the script to modify in-place")
print(" the source files. By default the results are written to stdout.")
print()
exit(1)
in_place = False
if args[0] == "-i":
in_place = True
args = args[1:]
for filename in args:
code = custom_format_cached(filename)
if in_place:
with open(filename, "w") as f:
f.write(code)
else:
print(code)
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