228 lines
6.6 KiB
Python
228 lines
6.6 KiB
Python
"""
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This script processes the output from the C preprocessor and extracts all
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qstr. Each qstr is transformed into a qstr definition of the form 'Q(...)'.
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This script works with Python 2.6, 2.7, 3.3 and 3.4.
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"""
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from __future__ import print_function
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import io
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import os
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import re
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import subprocess
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import sys
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import multiprocessing, multiprocessing.dummy
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# Python 2/3 compatibility:
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# - iterating through bytes is different
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# - codepoint2name lives in a different module
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import platform
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if platform.python_version_tuple()[0] == "2":
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bytes_cons = lambda val, enc=None: bytearray(val)
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from htmlentitydefs import name2codepoint
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elif platform.python_version_tuple()[0] == "3":
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bytes_cons = bytes
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from html.entities import name2codepoint
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unichr = chr
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# end compatibility code
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# Blocklist of qstrings that are specially handled in further
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# processing and should be ignored
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QSTRING_BLOCK_LIST = set(["NULL", "number_of"])
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# add some custom names to map characters that aren't in HTML
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name2codepoint["hyphen"] = ord("-")
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name2codepoint["space"] = ord(" ")
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name2codepoint["squot"] = ord("'")
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name2codepoint["comma"] = ord(",")
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name2codepoint["dot"] = ord(".")
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name2codepoint["colon"] = ord(":")
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name2codepoint["semicolon"] = ord(";")
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name2codepoint["slash"] = ord("/")
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name2codepoint["percent"] = ord("%")
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name2codepoint["hash"] = ord("#")
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name2codepoint["paren_open"] = ord("(")
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name2codepoint["paren_close"] = ord(")")
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name2codepoint["bracket_open"] = ord("[")
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name2codepoint["bracket_close"] = ord("]")
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name2codepoint["brace_open"] = ord("{")
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name2codepoint["brace_close"] = ord("}")
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name2codepoint["star"] = ord("*")
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name2codepoint["bang"] = ord("!")
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name2codepoint["backslash"] = ord("\\")
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name2codepoint["plus"] = ord("+")
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name2codepoint["dollar"] = ord("$")
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name2codepoint["equals"] = ord("=")
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name2codepoint["question"] = ord("?")
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name2codepoint["at_sign"] = ord("@")
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name2codepoint["caret"] = ord("^")
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name2codepoint["pipe"] = ord("|")
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name2codepoint["tilde"] = ord("~")
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# These are just vexing!
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del name2codepoint["and"]
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del name2codepoint["or"]
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del name2codepoint["not"]
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def preprocess():
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if any(src in args.dependencies for src in args.changed_sources):
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sources = args.sources
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elif any(args.changed_sources):
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sources = args.changed_sources
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else:
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sources = args.sources
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csources = []
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cxxsources = []
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for source in sources:
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if source.endswith(".cpp"):
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cxxsources.append(source)
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elif source.endswith(".c"):
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csources.append(source)
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try:
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os.makedirs(os.path.dirname(args.output[0]))
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except OSError:
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pass
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def pp(flags):
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def run(files):
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return subprocess.check_output(args.pp + flags + files)
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return run
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try:
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cpus = multiprocessing.cpu_count()
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except NotImplementedError:
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cpus = 1
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p = multiprocessing.dummy.Pool(cpus)
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with open(args.output[0], "wb") as out_file:
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for flags, sources in (
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(args.cflags, csources),
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(args.cxxflags, cxxsources),
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):
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batch_size = (len(sources) + cpus - 1) // cpus
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chunks = [sources[i : i + batch_size] for i in range(0, len(sources), batch_size or 1)]
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for output in p.imap(pp(flags), chunks):
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out_file.write(output)
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def write_out(fname, output):
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if output:
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for m, r in [("/", "__"), ("\\", "__"), (":", "@"), ("..", "@@")]:
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fname = fname.replace(m, r)
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with open(args.output_dir + "/" + fname + ".qstr", "w") as f:
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f.write("\n".join(output) + "\n")
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def qstr_unescape(qstr):
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for name in name2codepoint:
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if "__" + name + "__" in qstr:
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continue
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if "_" + name + "_" in qstr:
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qstr = qstr.replace("_" + name + "_", str(unichr(name2codepoint[name])))
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return qstr
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def process_file(f):
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re_line = re.compile(r"#[line]*\s(\d+)\s\"([^\"]+)\"")
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re_qstr = re.compile(r"MP_QSTR_[_a-zA-Z0-9]+")
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re_translate = re.compile(r"translate\(\"((?:(?=(\\?))\2.)*?)\"\)")
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output = []
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last_fname = None
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lineno = 0
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for line in f:
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if line.isspace():
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continue
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# match gcc-like output (# n "file") and msvc-like output (#line n "file")
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if line.startswith(("# ", "#line")):
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m = re_line.match(line)
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assert m is not None
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lineno = int(m.group(1))
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fname = m.group(2)
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if os.path.splitext(fname)[1] not in [".c", ".cpp"]:
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continue
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if fname != last_fname:
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write_out(last_fname, output)
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output = []
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last_fname = fname
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continue
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for match in re_qstr.findall(line):
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name = match.replace("MP_QSTR_", "")
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if name not in QSTRING_BLOCK_LIST:
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output.append("Q(" + qstr_unescape(name) + ")")
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for match in re_translate.findall(line):
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output.append('TRANSLATE("' + match[0] + '")')
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lineno += 1
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if last_fname:
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write_out(last_fname, output)
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return ""
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def cat_together():
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import glob
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import hashlib
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hasher = hashlib.md5()
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all_lines = []
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outf = open(args.output_dir + "/out", "wb")
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for fname in glob.glob(args.output_dir + "/*.qstr"):
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with open(fname, "rb") as f:
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lines = f.readlines()
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all_lines += lines
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all_lines.sort()
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all_lines = b"\n".join(all_lines)
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outf.write(all_lines)
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outf.close()
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hasher.update(all_lines)
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new_hash = hasher.hexdigest()
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# print(new_hash)
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old_hash = None
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try:
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with open(args.output_file + ".hash") as f:
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old_hash = f.read()
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except IOError:
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pass
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if old_hash != new_hash:
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print("QSTR updated")
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try:
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# rename below might fail if file exists
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os.remove(args.output_file)
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except:
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pass
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os.rename(args.output_dir + "/out", args.output_file)
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with open(args.output_file + ".hash", "w") as f:
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f.write(new_hash)
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else:
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print("QSTR not updated")
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if __name__ == "__main__":
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if len(sys.argv) != 5:
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print("usage: %s command input_filename output_dir output_file" % sys.argv[0])
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sys.exit(2)
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class Args:
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pass
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args = Args()
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args.command = sys.argv[1]
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args.input_filename = sys.argv[2]
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args.output_dir = sys.argv[3]
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args.output_file = sys.argv[4]
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try:
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os.makedirs(args.output_dir)
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except OSError:
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pass
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if args.command == "split":
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with io.open(args.input_filename, encoding="utf-8") as infile:
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process_file(infile)
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if args.command == "cat":
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cat_together()
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