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#!/usr/bin/env python
# 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
def preprocess(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)
# Mangle typeswitches to look like switch statements with the extra type
# information and syntax encoded in comments.
input = re.sub(r'(\s+)typeswitch\s*\(', r'\1/*_TYPE*/switch (', input)
input = re.sub(r'(\s+)case\s*\(\s*([^\:]+)\s*\)(\s*)\:\s*deferred',
r'\1case \2: /*_TSXDEFERRED_*/', input)
input = re.sub(r'(\s+)case\s*\(\s*([^\:]+)\s*\)(\s*)\:',
r'\1case \2: /*_TSX*/', input)
input = re.sub(r'(\s+)case\s*\(\s*([^\s]+)\s*\:\s*([^\:]+)\s*\)(\s*)\:\s*deferred',
r'\1case \3: /*_TSVDEFERRED_\2:*/', input)
input = re.sub(r'(\s+)case\s*\(\s*([^\s]+)\s*\:\s*([^\:]+)\s*\)(\s*)\:',
r'\1case \3: /*_TSV\2:*/', input)
# Add extra space around | operators to fix union types later.
while True:
old = input
input = re.sub(r'(\w+\s*)\|(\s*\w+)',
r'\1|/**/\2', input)
if old == input:
break;
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)
return input
def postprocess(output):
output = re.sub(r'%\s*RawDownCast', r'%RawDownCast', output)
output = re.sub(r'%\s*RawConstexprCast', r'%RawConstexprCast', output)
output = re.sub(r'%\s*FromConstexpr', r'%FromConstexpr', output)
output = re.sub(r'%\s*Allocate', r'%Allocate', output)
output = re.sub(r'%\s*GetAllocationBaseSize', r'%GetAllocationBaseSize', 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'\/\*_TYPE\*\/(\s*)switch', r'typeswitch', output)
output = re.sub(r'case (\w+)\:\s*\/\*_TSXDEFERRED_\*\/',
r'case (\1): deferred', output)
output = re.sub(r'case (\w+)\:\s*\/\*_TSX\*\/',
r'case (\1):', output)
output = re.sub(r'case (\w+)\:\s*\/\*_TSVDEFERRED_([^\:]+)\:\*\/',
r'case (\2: \1): deferred', output)
output = re.sub(r'case (\w+)\:\s*\/\*_TSV([^\:]+)\:\*\/',
r'case (\2: \1):', 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)
while True:
old = output
output = re.sub(r'(\w+)\s{0,1}\|\s{0,1}/\*\*/(\s*\w+)',
r'\1 |\2', output)
if old == output:
break;
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(preprocess(content))
output = postprocess(output)
rc = p.returncode
if (rc != 0):
print("error code " + str(rc) + " running clang-format. Exiting...")
sys.exit(rc);
if lint:
if (output != original_input):
print(filename + ' requires formatting', file=sys.stderr)
if should_format:
output_file = open(filename, 'w')
output_file.write(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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