cppcheck/addons/namingng.py

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#!/usr/bin/env python3
#
# cppcheck addon for naming conventions
# An enhanced version. Configuration is taken from a json file
# It supports to check for type-based prefixes in function or variable names.
#
# Example usage (variable name must start with lowercase, function name must start with uppercase):
# $ cppcheck --dump path-to-src/
# $ python naming.py namingng.py test.c.dump
#
# JSON format:
#
# {
# "RE_VARNAME": "[a-z]*[a-zA-Z0-9_]*\\Z",
# "RE_PRIVATE_MEMBER_VARIABLE": null,
# "RE_FUNCTIONNAME": "[a-z0-9A-Z]*\\Z",
# "var_prefixes": {"uint32_t": "ui32"},
# "function_prefixes": {"uint16_t": "ui16",
# "uint32_t": "ui32"}
# }
#
# RE_VARNAME, RE_PRIVATE_MEMBER_VARIABE and RE_FUNCTIONNAME are regular expressions to cover hte basic names
# In var_prefixes and function_prefixes there are the variable-type/prefix pairs
import cppcheckdata
import sys
import re
import argparse
import json
def reportError(filename, linenr, severity, msg):
message = "[{filename}:{linenr}] ( {severity} ) naming.py: {msg}\n".format(
filename=filename,
linenr=linenr,
severity=severity,
msg=msg
)
sys.stderr.write(message)
return message
def loadConfig(configfile):
with open(configfile) as fh:
data = json.load(fh)
return data
def process(dumpfiles, configfile, debugprint=False):
errors = []
conf = loadConfig(configfile)
for afile in dumpfiles:
if not afile[-5:] == '.dump':
continue
print('Checking ' + afile + '...')
data = cppcheckdata.parsedump(afile)
for cfg in data.configurations:
if len(data.configurations) > 1:
print('Checking ' + afile + ', config "' + cfg.name + '"...')
if conf["RE_VARNAME"]:
for var in cfg.variables:
if var.nameToken:
prev = var.nameToken.previous
varType = prev.str
while "*" in varType and len(varType.replace("*", "")) == 0:
prev = prev.previous
varType = prev.str + varType
if debugprint:
print("Variable Name: " + str(var.nameToken.str))
print("original Type Name: " + str(var.nameToken.valueType.originalTypeName))
print("Type Name: " + var.nameToken.valueType.type)
print("Sign: " + str(var.nameToken.valueType.sign))
print("variable type: " + varType)
print("\n")
print("\t-- {} {}".format(varType, str(var.nameToken.str)))
if conf["skip_one_char_variables"] and len(var.nameToken.str) == 1:
continue
if varType in conf["var_prefixes"]:
if not var.nameToken.str.startswith(conf["var_prefixes"][varType]):
errors.append(reportError(
var.typeStartToken.file,
var.typeStartToken.linenr,
'style',
'Variable ' +
var.nameToken.str +
' violates naming convention'))
res = re.match(conf["RE_VARNAME"], var.nameToken.str)
if not res:
errors.append(reportError(var.typeStartToken.file, var.typeStartToken.linenr, 'style', 'Variable ' +
var.nameToken.str + ' violates naming convention'))
if conf["RE_PRIVATE_MEMBER_VARIABLE"]:
# TODO: Not converted yet
for var in cfg.variables:
if (var.access is None) or var.access != 'Private':
continue
res = re.match(conf["RE_PRIVATE_MEMBER_VARIABLE"], var.nameToken.str)
if not res:
errors.append(reportError(var.typeStartToken.file, var.typeStartToken.linenr, 'style', 'Private member variable ' +
var.nameToken.str + ' violates naming convention'))
if conf["RE_FUNCTIONNAME"]:
for token in cfg.tokenlist:
if token.function:
retval = token.previous.str
prev = token.previous
while "*" in retval and len(retval.replace("*", "")) == 0:
prev = prev.previous
retval = prev.str + retval
if debugprint:
print("\t:: {} {}".format(retval, token.function.name))
if retval and retval in conf["function_prefixes"]:
if not token.function.name.startswith(conf["function_prefixes"][retval]):
errors.append(reportError(
token.file, token.linenr, 'style', 'Function ' + token.function.name + ' violates naming convention'))
res = re.match(conf["RE_FUNCTIONNAME"], token.function.name)
if not res:
errors.append(reportError(
token.file, token.linenr, 'style', 'Function ' + token.function.name + ' violates naming convention'))
return errors
if __name__ == "__main__":
parser = argparse.ArgumentParser(description='Naming verification')
parser.add_argument('dumpfiles', type=str, nargs='+',
help='A set of dumpfiles to process')
parser.add_argument("--debugprint", action="store_true", default=False,
help="Add debug prints")
parser.add_argument("--configfile", type=str, default="naming.json",
help="Naming check config file")
parser.add_argument("--verify", action="store_true", default=False,
help="verify this script. Bust be executed in test folder !")
args = parser.parse_args()
errors = process(args.dumpfiles, args.configfile, args.debugprint)
if args.verify:
print(errors)
if len(errors) < 6:
print("Not enough errors found")
sys.exit(1)
target = [
'[namingng_test.c:8] ( style ) naming.py: Variable badui32 violates naming convention\n',
'[namingng_test.c:11] ( style ) naming.py: Variable a violates naming convention\n',
'[namingng_test.c:29] ( style ) naming.py: Variable badui32 violates naming convention\n',
'[namingng_test.c:20] ( style ) naming.py: Function ui16bad_underscore violates naming convention\n',
'[namingng_test.c:25] ( style ) naming.py: Function u32Bad violates naming convention\n',
'[namingng_test.c:37] ( style ) naming.py: Function Badui16 violates naming convention\n']
diff = set(errors) - set(target)
if len(diff):
print("Not the right errors found {}".format(str(diff)))
sys.exit(1)
print("Verification done\n")
sys.exit(0)
if len(errors):
print('Found errors: {}'.format(len(errors)))
sys.exit(1)
sys.exit(0)