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 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_VARIABLE and RE_FUNCTIONNAME are regular expressions to cover the 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
# Auxiliary class
class DataStruct:
def __init__(self, file, linenr, string):
self.file = file
self.linenr = linenr
self.str = string
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 checkTrueRegex(data, expr, msg, errors):
res = re.match(expr, data.str)
if res:
errors.append(reportError(data.file, data.linenr, 'style', msg))
def checkFalseRegex(data, expr, msg, errors):
res = re.match(expr, data.str)
if not res:
errors.append(reportError(data.file, data.linenr, 'style', msg))
def evalExpr(conf, exp, mockToken, msgType, errors):
if isinstance(conf, dict):
if conf[exp][0]:
msg = msgType + ' ' + mockToken.str + ' violates naming convention : ' + conf[exp][1]
checkTrueRegex(mockToken, exp, msg, errors)
elif ~conf[exp][0]:
msg = msgType + ' ' + mockToken.str + ' violates naming convention : ' + conf[exp][1]
checkFalseRegex(mockToken, exp, msg, errors)
else:
msg = msgType + ' ' + mockToken.str + ' violates naming convention : ' + conf[exp][0]
checkFalseRegex(mockToken, exp, msg, errors)
else:
msg = msgType + ' ' + mockToken.str + ' violates naming convention'
checkFalseRegex(mockToken, exp, msg, errors)
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)
# Check File naming
if "RE_FILE" in conf and conf["RE_FILE"]:
mockToken = DataStruct(afile[:-5], "0", afile[afile.rfind('/') + 1:-5])
msgType = 'File name'
for exp in conf["RE_FILE"]:
evalExpr(conf["RE_FILE"], exp, mockToken, msgType, errors)
# Check Namespace naming
if "RE_NAMESPACE" in conf and conf["RE_NAMESPACE"]:
for tk in data.rawTokens:
if tk.str == 'namespace':
mockToken = DataStruct(tk.next.file, tk.next.linenr, tk.next.str)
msgType = 'Namespace'
for exp in conf["RE_NAMESPACE"]:
evalExpr(conf["RE_NAMESPACE"], exp, mockToken, msgType, errors)
for cfg in data.configurations:
if len(data.configurations) > 1:
print('Checking ' + afile + ', config "' + cfg.name + '"...')
if "RE_VARNAME" in conf and conf["RE_VARNAME"]:
for var in cfg.variables:
if var.nameToken and var.access != 'Global' and var.access != 'Public' and var.access != 'Private':
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'))
mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str)
msgType = 'Variable'
for exp in conf["RE_VARNAME"]:
evalExpr(conf["RE_VARNAME"], exp, mockToken, msgType, errors)
# Check Private Variable naming
if "RE_PRIVATE_MEMBER_VARIABLE" in conf and conf["RE_PRIVATE_MEMBER_VARIABLE"]:
# TODO: Not converted yet
for var in cfg.variables:
if (var.access is None) or var.access != 'Private':
continue
mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str)
msgType = 'Private member variable'
for exp in conf["RE_PRIVATE_MEMBER_VARIABLE"]:
evalExpr(conf["RE_PRIVATE_MEMBER_VARIABLE"], exp, mockToken, msgType, errors)
# Check Public Member Variable naming
if "RE_PUBLIC_MEMBER_VARIABLE" in conf and conf["RE_PUBLIC_MEMBER_VARIABLE"]:
for var in cfg.variables:
if (var.access is None) or var.access != 'Public':
continue
mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str)
msgType = 'Public member variable'
for exp in conf["RE_PUBLIC_MEMBER_VARIABLE"]:
evalExpr(conf["RE_PUBLIC_MEMBER_VARIABLE"], exp, mockToken, msgType, errors)
# Check Global Variable naming
if "RE_GLOBAL_VARNAME" in conf and conf["RE_GLOBAL_VARNAME"]:
for var in cfg.variables:
if (var.access is None) or var.access != 'Global':
continue
mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str)
msgType = 'Public member variable'
for exp in conf["RE_GLOBAL_VARNAME"]:
evalExpr(conf["RE_GLOBAL_VARNAME"], exp, mockToken, msgType, errors)
# Check Functions naming
if "RE_FUNCTIONNAME" in conf and conf["RE_FUNCTIONNAME"]:
for token in cfg.tokenlist:
if token.function:
if token.function.type == 'Constructor' or token.function.type == 'Destructor':
continue
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'))
mockToken = DataStruct(token.file, token.linenr, token.function.name)
msgType = 'Function'
for exp in conf["RE_FUNCTIONNAME"]:
evalExpr(conf["RE_FUNCTIONNAME"], exp, mockToken, msgType, errors)
# Check Class naming
if "RE_CLASS_NAME" in conf and conf["RE_CLASS_NAME"]:
for fnc in cfg.functions:
# Check if it is Constructor/Destructor
if fnc.type == 'Constructor' or fnc.type == 'Destructor':
mockToken = DataStruct(fnc.tokenDef.file, fnc.tokenDef.linenr, fnc.name)
msgType = 'Class ' + fnc.type
for exp in conf["RE_CLASS_NAME"]:
evalExpr(conf["RE_CLASS_NAME"], exp, mockToken, msgType, errors)
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. Must 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)