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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright 2014 the V8 project authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""This program either generates the parser files for Torque, generating
the source and header files directly in V8's src directory."""
# for py2/py3 compatibility
from __future__ import print_function
import subprocess
import sys
import re
from subprocess import Popen, PIPE
PYTHON3 = sys.version_info >= (3, 0)
def maybe_decode(arg, encoding="utf-8"):
return arg.decode(encoding) if PYTHON3 else arg
def maybe_encode(arg, encoding="utf-8"):
return arg.encode(encoding) if PYTHON3 else arg
kPercentEscape = r'α'; # Unicode alpha
kDerefEscape = r'☆'; # Unicode star
kAddressofEscape = r'⌂'; # Unicode house
def preprocess(input):
# Special handing of '%' for intrinsics, turn the percent
# into a unicode character so that it gets treated as part of the
# intrinsic's name if it's already adjacent to it.
input = re.sub(r'%([A-Za-z])', kPercentEscape + r'\1', input)
# Similarly, avoid treating * and & as binary operators when they're
# probably used as address operators.
input = re.sub(r'([^/])\*([a-zA-Z(])', r'\1' + kDerefEscape + r'\2', input)
input = re.sub(r'&([a-zA-Z(])', kAddressofEscape + r'\1', input)
input = re.sub(r'(if\s+)constexpr(\s*\()', r'\1/*COxp*/\2', input)
input = re.sub(r'(\s+)operator\s*(\'[^\']+\')', r'\1/*_OPE \2*/', input)
input = re.sub(r'\btypeswitch\s*(\([^{]*\))\s{', r' if /*tPsW*/ \1 {', input)
input = re.sub(r'\bcase\s*(\([^{]*\))\s*:\s*deferred\s*{', r' if /*cAsEdEfF*/ \1 {', input)
input = re.sub(r'\bcase\s*(\([^{]*\))\s*:\s*{', r' if /*cA*/ \1 {', input)
input = re.sub(r'\bgenerates\s+\'([^\']+)\'\s*',
r'_GeNeRaTeS00_/*\1@*/', input)
input = re.sub(r'\bconstexpr\s+\'([^\']+)\'\s*',
r' _CoNsExP_/*\1@*/', input)
input = re.sub(r'\notherwise',
r'\n otherwise', input)
input = re.sub(r'(\n\s*\S[^\n]*\s)otherwise',
r'\1_OtheSaLi', input)
input = re.sub(r'@if\(', r'@iF(', input)
input = re.sub(r'@export', r'@eXpOrT', input)
input = re.sub(r'js-implicit[ \n]+', r'jS_iMpLiCiT_', input)
input = re.sub(r'^(\s*namespace\s+[a-zA-Z_0-9]+\s*{)(\s*)$', r'\1}\2', input, flags = re.MULTILINE)
# includes are not recognized, change them into comments so that the
# formatter ignores them first, until we can figure out a way to format cpp
# includes within a JS file.
input = re.sub(r'^#include', r'// InClUdE', input, flags=re.MULTILINE)
return input
def postprocess(output):
output = re.sub(r'\/\*COxp\*\/', r'constexpr', output)
output = re.sub(r'(\S+)\s*: type([,>])', r'\1: type\2', output)
output = re.sub(r'(\n\s*)labels( [A-Z])', r'\1 labels\2', output)
output = re.sub(r'\/\*_OPE \'([^\']+)\'\*\/', r"operator '\1'", output)
output = re.sub(r'\bif\s*\/\*tPsW\*\/', r'typeswitch', output)
output = re.sub(r'\bif\s*\/\*cA\*\/\s*(\([^{]*\))\s*{', r'case \1: {', output)
output = re.sub(r'\bif\s*\/\*cAsEdEfF\*\/\s*(\([^{]*\))\s*{', r'case \1: deferred {', output)
output = re.sub(r'\n_GeNeRaTeS00_\s*\/\*([^@]+)@\*\/',
r"\n generates '\1'", output)
output = re.sub(r'_GeNeRaTeS00_\s*\/\*([^@]+)@\*\/',
r"generates '\1'", output)
output = re.sub(r'_CoNsExP_\s*\/\*([^@]+)@\*\/',
r"constexpr '\1'", output)
output = re.sub(r'\n(\s+)otherwise',
r"\n\1 otherwise", output)
output = re.sub(r'\n(\s+)_OtheSaLi',
r"\n\1otherwise", output)
output = re.sub(r'_OtheSaLi',
r"otherwise", output)
output = re.sub(r'@iF\(', r'@if(', output)
output = re.sub(r'@eXpOrT',
r"@export", output)
output = re.sub(r'jS_iMpLiCiT_',
r"js-implicit ", output)
output = re.sub(r'}\n *label ', r'} label ', output);
output = re.sub(r'^(\s*namespace\s+[a-zA-Z_0-9]+\s*{)}(\s*)$', r'\1\2', output, flags = re.MULTILINE);
output = re.sub(kPercentEscape, r'%', output)
output = re.sub(kDerefEscape, r'*', output)
output = re.sub(kAddressofEscape, r'&', output)
output = re.sub( r'^// InClUdE',r'#include', output, flags=re.MULTILINE)
return output
def process(filename, lint, should_format):
with open(filename, 'r') as content_file:
content = content_file.read()
original_input = content
if sys.platform.startswith('win'):
p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE, shell=True)
else:
p = Popen(['clang-format', '-assume-filename=.ts'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
output, err = p.communicate(maybe_encode(preprocess(content)))
output = postprocess(maybe_decode(output))
rc = p.returncode
if (rc != 0):
print("error code " + str(rc) + " running clang-format. Exiting...")
sys.exit(rc);
if (output != original_input):
if lint:
print(filename + ' requires formatting', file=sys.stderr)
if should_format:
output_file = open(filename, 'wb')
output_file.write(maybe_encode(output))
output_file.close()
def print_usage():
print('format-torque -i file1[, file2[, ...]]')
print(' format and overwrite input files')
print('format-torque -l file1[, file2[, ...]]')
print(' merely indicate which files need formatting')
def Main():
if len(sys.argv) < 3:
print("error: at least 2 arguments required")
print_usage();
sys.exit(-1)
def is_option(arg):
return arg in ['-i', '-l', '-il']
should_format = lint = False
use_stdout = True
flag, files = sys.argv[1], sys.argv[2:]
if is_option(flag):
if '-i' == flag:
should_format = True
elif '-l' == flag:
lint = True
else:
lint = True
should_format = True
else:
print("error: -i and/or -l flags must be specified")
print_usage();
sys.exit(-1);
for filename in files:
process(filename, lint, should_format)
return 0
if __name__ == '__main__':
sys.exit(Main());
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