mirror of
https://gitee.com/openharmony/third_party_libsnd
synced 2024-11-23 09:59:54 +00:00
257 lines
7.9 KiB
Python
Executable File
257 lines
7.9 KiB
Python
Executable File
#!/usr/bin/python -tt
|
|
#
|
|
# Copyright (C) 2005-2017 Erik de Castro Lopo <erikd@mega-nerd.com>
|
|
#
|
|
# Released under the 2 clause BSD license.
|
|
|
|
"""
|
|
This program checks C code for compliance to coding standards used in
|
|
libsndfile and other projects I run.
|
|
"""
|
|
|
|
import re
|
|
import sys
|
|
|
|
|
|
class Preprocessor:
|
|
"""
|
|
Preprocess lines of C code to make it easier for the CStyleChecker class to
|
|
test for correctness. Preprocessing works on a single line at a time but
|
|
maintains state between consecutive lines so it can preprocessess multi-line
|
|
comments.
|
|
Preprocessing involves:
|
|
- Strip C++ style comments from a line.
|
|
- Strip C comments from a series of lines. When a C comment starts and
|
|
ends on the same line it will be replaced with 'comment'.
|
|
- Replace arbitrary C strings with the zero length string.
|
|
- Replace '#define f(x)' with '#define f (c)' (The C #define requires that
|
|
there be no space between defined macro name and the open paren of the
|
|
argument list).
|
|
Used by the CStyleChecker class.
|
|
"""
|
|
def __init__ (self):
|
|
self.comment_nest = 0
|
|
self.leading_space_re = re.compile ('^(\t+| )')
|
|
self.trailing_space_re = re.compile ('(\t+| )$')
|
|
self.define_hack_re = re.compile ("(#\s*define\s+[a-zA-Z0-9_]+)\(")
|
|
|
|
def comment_nesting (self):
|
|
"""
|
|
Return the currect comment nesting. At the start and end of the file,
|
|
this value should be zero. Inside C comments it should be 1 or
|
|
(possibly) more.
|
|
"""
|
|
return self.comment_nest
|
|
|
|
def __call__ (self, line):
|
|
"""
|
|
Strip the provided line of C and C++ comments. Stripping of multi-line
|
|
C comments works as expected.
|
|
"""
|
|
|
|
line = self.define_hack_re.sub (r'\1 (', line)
|
|
|
|
line = self.process_strings (line)
|
|
|
|
# Strip C++ style comments.
|
|
if self.comment_nest == 0:
|
|
line = re.sub ("( |\t*)//.*", '', line)
|
|
|
|
# Strip C style comments.
|
|
open_comment = line.find ('/*')
|
|
close_comment = line.find ('*/')
|
|
|
|
if self.comment_nest > 0 and close_comment < 0:
|
|
# Inside a comment block that does not close on this line.
|
|
return ""
|
|
|
|
if open_comment >= 0 and close_comment < 0:
|
|
# A comment begins on this line but doesn't close on this line.
|
|
self.comment_nest += 1
|
|
return self.trailing_space_re.sub ('', line [:open_comment])
|
|
|
|
if open_comment < 0 and close_comment >= 0:
|
|
# Currently open comment ends on this line.
|
|
self.comment_nest -= 1
|
|
return self.trailing_space_re.sub ('', line [close_comment + 2:])
|
|
|
|
if open_comment >= 0 and close_comment > 0 and self.comment_nest == 0:
|
|
# Comment begins and ends on this line. Replace it with 'comment'
|
|
# so we don't need to check whitespace before and after the comment
|
|
# we're removing.
|
|
newline = line [:open_comment] + "comment" + line [close_comment + 2:]
|
|
return self.__call__ (newline)
|
|
|
|
return line
|
|
|
|
def process_strings (self, line):
|
|
"""
|
|
Given a line of C code, return a string where all literal C strings have
|
|
been replaced with the empty string literal "".
|
|
"""
|
|
for k in range (0, len (line)):
|
|
if line [k] == '"':
|
|
start = k
|
|
for k in range (start + 1, len (line)):
|
|
if line [k] == '"' and line [k - 1] != '\\':
|
|
return line [:start + 1] + '"' + self.process_strings (line [k + 1:])
|
|
return line
|
|
|
|
|
|
class CStyleChecker:
|
|
"""
|
|
A class for checking the whitespace and layout of a C code.
|
|
"""
|
|
def __init__ (self, debug):
|
|
self.debug = debug
|
|
self.filename = None
|
|
self.error_count = 0
|
|
self.line_num = 1
|
|
self.orig_line = ''
|
|
self.trailing_newline_re = re.compile ('[\r\n]+$')
|
|
self.indent_re = re.compile ("^\s*")
|
|
self.last_line_indent = ""
|
|
self.last_line_indent_curly = False
|
|
self.re_checks = \
|
|
[ ( re.compile (" "), "multiple space instead of tab" )
|
|
, ( re.compile ("\t "), "space after tab" )
|
|
, ( re.compile ("[^ ];"), "missing space before semi-colon" )
|
|
, ( re.compile ("{[^\s}]"), "missing space after open brace" )
|
|
, ( re.compile ("[^{\s]}"), "missing space before close brace" )
|
|
, ( re.compile ("[ \t]+$"), "contains trailing whitespace" )
|
|
|
|
, ( re.compile (",[^\s\n]"), "missing space after comma" )
|
|
, ( re.compile (";[^\s]"), "missing space after semi-colon" )
|
|
, ( re.compile ("=[^\s\"'=]"), "missing space after assignment" )
|
|
|
|
# Open and close parenthesis.
|
|
, ( re.compile ("[^\s\(\[\*&']\("), "missing space before open parenthesis" )
|
|
, ( re.compile ("\)(-[^>]|[^,'\s\n\)\]-])"), "missing space after close parenthesis" )
|
|
, ( re.compile ("\s(do|for|if|when)\s.*{$"), "trailing open parenthesis at end of line" )
|
|
, ( re.compile ("\( [^;]"), "space after open parenthesis" )
|
|
, ( re.compile ("[^;] \)"), "space before close parenthesis" )
|
|
|
|
# Open and close square brace.
|
|
, ( re.compile ("[^\s\(\]]\["), "missing space before open square brace" )
|
|
, ( re.compile ("\][^,\)\]\[\s\.-]"), "missing space after close square brace" )
|
|
, ( re.compile ("\[ "), "space after open square brace" )
|
|
, ( re.compile (" \]"), "space before close square brace" )
|
|
|
|
# Space around operators.
|
|
, ( re.compile ("[^\s][\*/%+-][=][^\s]"), "missing space around opassign" )
|
|
, ( re.compile ("[^\s][<>!=^/][=]{1,2}[^\s]"), "missing space around comparison" )
|
|
|
|
# Parens around single argument to return.
|
|
, ( re.compile ("\s+return\s+\([a-zA-Z0-9_]+\)\s+;"), "parens around return value" )
|
|
|
|
# Parens around single case argument.
|
|
, ( re.compile ("\s+case\s+\([a-zA-Z0-9_]+\)\s+:"), "parens around single case argument" )
|
|
|
|
# Open curly at end of line.
|
|
, ( re.compile ("\)\s*{\s*$"), "open curly brace at end of line" )
|
|
|
|
# Pre and post increment/decrment.
|
|
, ( re.compile ("[^\(\[][+-]{2}[a-zA-Z0-9_]"), "space after pre increment/decrement" )
|
|
, ( re.compile ("[a-zA-Z0-9_][+-]{2}[^\)\,]]"), "space before post increment/decrement" )
|
|
]
|
|
|
|
def get_error_count (self):
|
|
"""
|
|
Return the current error count for this CStyleChecker object.
|
|
"""
|
|
return self.error_count
|
|
|
|
def check_files (self, files):
|
|
"""
|
|
Run the style checker on all the specified files.
|
|
"""
|
|
for filename in files:
|
|
self.check_file (filename)
|
|
|
|
def check_file (self, filename):
|
|
"""
|
|
Run the style checker on the specified file.
|
|
"""
|
|
self.filename = filename
|
|
cfile = open (filename, "r")
|
|
|
|
self.line_num = 1
|
|
|
|
preprocess = Preprocessor ()
|
|
while 1:
|
|
line = cfile.readline ()
|
|
if not line:
|
|
break
|
|
|
|
line = self.trailing_newline_re.sub ('', line)
|
|
self.orig_line = line
|
|
|
|
self.line_checks (preprocess (line))
|
|
|
|
self.line_num += 1
|
|
|
|
cfile.close ()
|
|
self.filename = None
|
|
|
|
# Check for errors finding comments.
|
|
if preprocess.comment_nesting () != 0:
|
|
print ("Weird, comments nested incorrectly.")
|
|
sys.exit (1)
|
|
|
|
return
|
|
|
|
def line_checks (self, line):
|
|
"""
|
|
Run the style checker on provided line of text, but within the context
|
|
of how the line fits within the file.
|
|
"""
|
|
|
|
indent = len (self.indent_re.search (line).group ())
|
|
if re.search ("^\s+}", line):
|
|
if not self.last_line_indent_curly and indent != self.last_line_indent:
|
|
None # self.error ("bad indent on close curly brace")
|
|
self.last_line_indent_curly = True
|
|
else:
|
|
self.last_line_indent_curly = False
|
|
|
|
# Now all the regex checks.
|
|
for (check_re, msg) in self.re_checks:
|
|
if check_re.search (line):
|
|
self.error (msg)
|
|
|
|
if re.search ("[a-zA-Z0-9][<>!=^/&\|]{1,2}[a-zA-Z0-9]", line):
|
|
if not re.search (".*#include.*[a-zA-Z0-9]/[a-zA-Z]", line):
|
|
self.error ("missing space around operator")
|
|
|
|
self.last_line_indent = indent
|
|
return
|
|
|
|
def error (self, msg):
|
|
"""
|
|
Print an error message and increment the error count.
|
|
"""
|
|
print ("%s (%d) : %s" % (self.filename, self.line_num, msg))
|
|
if self.debug:
|
|
print ("'" + self.orig_line + "'")
|
|
self.error_count += 1
|
|
|
|
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
|
|
|
|
if len (sys.argv) < 1:
|
|
print ("Usage : yada yada")
|
|
sys.exit (1)
|
|
|
|
# Create a new CStyleChecker object
|
|
if sys.argv [1] == '-d' or sys.argv [1] == '--debug':
|
|
cstyle = CStyleChecker (True)
|
|
cstyle.check_files (sys.argv [2:])
|
|
else:
|
|
cstyle = CStyleChecker (False)
|
|
cstyle.check_files (sys.argv [1:])
|
|
|
|
|
|
if cstyle.get_error_count ():
|
|
sys.exit (1)
|
|
|
|
sys.exit (0)
|