427 lines
18 KiB
Python
Executable File
427 lines
18 KiB
Python
Executable File
#!/usr/bin/env python3
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#
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# cppcheck addon for naming conventions
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# An enhanced version. Configuration is taken from a json file
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# It supports to check for type-based prefixes in function or variable names.
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# Aside from include guard naming, include guard presence can also be tested.
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#
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# Example usage (variable name must start with lowercase, function name must start with uppercase):
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# $ cppcheck --dump path-to-src/
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# $ python namingng.py test.c.dump
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#
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# JSON format:
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#
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# {
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# "RE_VARNAME": ["[a-z]*[a-zA-Z0-9_]*\\Z"],
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# "RE_PRIVATE_MEMBER_VARIABLE": null,
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# "RE_FUNCTIONNAME": ["[a-z0-9A-Z]*\\Z"],
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# "_comment": "comments can be added to the config with underscore-prefixed keys",
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# "include_guard": {
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# "input": "path",
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# "prefix": "GUARD_",
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# "case": "upper",
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# "max_linenr": 5,
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# "RE_HEADERFILE": "[^/].*\\.h\\Z",
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# "required": true
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# },
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# "var_prefixes": {"uint32_t": "ui32"},
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# "function_prefixes": {"uint16_t": "ui16",
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# "uint32_t": "ui32"}
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# }
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#
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# RE_VARNAME, RE_PRIVATE_MEMBER_VARIABLE and RE_FUNCTIONNAME are regular expressions to cover the basic names
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# In var_prefixes and function_prefixes there are the variable-type/prefix pairs
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import cppcheckdata
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import sys
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import os
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import re
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import argparse
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import json
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# Auxiliary class
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class DataStruct:
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def __init__(self, file, linenr, string, column=0):
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self.file = file
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self.linenr = linenr
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self.str = string
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self.column = column
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def reportNamingError(location,message,errorId='namingConvention',severity='style',extra='',column=None):
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cppcheckdata.reportError(location,severity,message,'namingng',errorId,extra,columnOverride=column)
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def configError(error,fatal=True):
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print('config error: %s'%error)
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if fatal:
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sys.exit(1)
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def loadConfig(configfile):
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if not os.path.exists(configfile):
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configError("cannot find config file '%s'"%configfile)
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try:
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with open(configfile) as fh:
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try:
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data = json.load(fh)
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except json.JSONDecodeError as e:
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configError("error parsing config file as JSON at line %d: %s"%(e.lineno,e.msg))
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except Exception as e:
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configError("error opening config file '%s': %s"%(configfile,e))
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if not isinstance(data, dict):
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configError('config file must contain a JSON object at the top level')
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# All errors are emitted before bailing out, to make the unit test more
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# effective.
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have_error = False
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# Put config items in a class, so that settings can be accessed using
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# config.feature
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class Config:
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pass
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config = Config()
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mapping = {
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'file': ('RE_FILE', list),
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'namespace': ('RE_NAMESPACE', list),
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'include_guard': ('include_guard', dict),
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'variable': ('RE_VARNAME', list),
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'variable_prefixes': ('var_prefixes', dict, {}),
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'private_member': ('RE_PRIVATE_MEMBER_VARIABLE', list),
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'public_member': ('RE_PUBLIC_MEMBER_VARIABLE', list),
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'global_variable': ('RE_GLOBAL_VARNAME', list),
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'function_name': ('RE_FUNCTIONNAME', list),
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'function_prefixes': ('function_prefixes', dict, {}),
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'class_name': ('RE_CLASS_NAME', list),
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'skip_one_char_variables': ('skip_one_char_variables', bool),
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}
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# parse defined keys and store as members of config object
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for key,opts in mapping.items():
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json_key = opts[0]
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req_type = opts[1]
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default = None if len(opts)<3 else opts[2]
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value = data.pop(json_key,default)
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if value is not None and not isinstance(value, req_type):
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req_typename = req_type.__name__
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got_typename = type(value).__name__
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configError('%s must be %s (not %s), or not set'%(json_key,req_typename,got_typename),fatal=False)
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have_error = True
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continue
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if req_type == list and value is not None:
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# type 'list' implies a list of regular expressions
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for item in value:
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try:
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re.compile(item)
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except re.error as err:
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configError("item '%s' of '%s' is not a valid regular expression: %s"%(item,json_key,err),fatal=False)
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have_error = True
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if have_error:
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continue
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setattr(config,key,value)
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# check remaining keys, only accept underscore-prefixed comments
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for key,value in data.items():
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if key == '' or key[0] != '_':
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configError("unknown config key '%s'"%key,fatal=False)
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have_error = True
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if have_error:
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sys.exit(1)
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return config
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def checkTrueRegex(data, expr, msg):
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res = re.match(expr, data.str)
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if res:
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reportNamingError(data,msg)
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def checkFalseRegex(data, expr, msg):
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res = re.match(expr, data.str)
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if not res:
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reportNamingError(data,msg)
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def evalExpr(conf, exp, mockToken, msgType):
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if isinstance(conf, dict):
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if conf[exp][0]:
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msg = msgType + ' ' + mockToken.str + ' violates naming convention : ' + conf[exp][1]
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checkTrueRegex(mockToken, exp, msg)
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elif ~conf[exp][0]:
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msg = msgType + ' ' + mockToken.str + ' violates naming convention : ' + conf[exp][1]
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checkFalseRegex(mockToken, exp, msg)
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else:
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msg = msgType + ' ' + mockToken.str + ' violates naming convention : ' + conf[exp][0]
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checkFalseRegex(mockToken, exp, msg)
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else:
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msg = msgType + ' ' + mockToken.str + ' violates naming convention'
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checkFalseRegex(mockToken, exp, msg)
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def check_include_guard_name(conf_include_guard,cfg,directive):
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parts = directive.str.split()
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if len(parts) != 2:
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msg = 'syntax error'
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reportNamingError(directive,msg,'syntax')
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return None,None
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guard_name = parts[1]
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guard_column = 1+directive.str.find(guard_name)
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filename = directive.file
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if conf_include_guard.get('input','path') == 'basename':
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filename = os.path.basename(filename)
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use_case = conf_include_guard.get('case','upper')
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if use_case == 'upper':
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filename = filename.upper()
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elif use_case == 'lower':
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filename = filename.lower()
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elif use_case == 'keep':
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pass # keep filename case as-is
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else:
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print("invalid config value for 'case': '%s'"%use_case,file=sys.stderr)
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sys.exit(1)
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barename = re.sub('[^A-Za-z0-9]','_',filename).strip('_')
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expect_guard_name = conf_include_guard.get('prefix','') + barename + conf_include_guard.get('suffix','')
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if expect_guard_name != guard_name:
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msg = 'include guard naming violation; %s != %s'%(guard_name,expect_guard_name)
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reportNamingError(directive,msg,'includeGuardName',column=guard_column)
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return guard_name,guard_column
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def check_include_guard(conf_include_guard,cfg,unguarded_include_files):
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# Scan for '#ifndef FILE_H' as the first directive, in the first N lines.
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# Then test whether the next directive #defines the found name.
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# Various tests are done:
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# - check include guards for their naming and consistency
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# - test whether include guards are in place
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max_linenr = conf_include_guard.get('max_linenr', 5)
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def report(directive,msg,errorId,column=0):
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reportNamingError(directive,msg,errorId,column=column)
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def report_pending_ifndef(directive,column):
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report(directive,'include guard #ifndef is not followed by #define','includeGuardIncomplete',column=column)
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last_fn = None
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pending_ifndef = None
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phase = 0
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for directive in cfg.directives:
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if last_fn != directive.file:
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if pending_ifndef:
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report_pending_ifndef(pending_ifndef,guard_column)
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pending_ifndef = None
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last_fn = directive.file
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phase = 0
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if phase == -1:
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# ignore (the remainder of) this file
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continue
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if not re.match(include_guard_header_re,directive.file):
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phase = -1
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continue
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if directive.linenr > max_linenr:
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if phase == 0 and conf_include_guard.get('required',1):
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report(directive,'include guard not found before line %d'%max_linenr,'includeGuardMissing')
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pass
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phase = -1
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continue
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if phase == 0:
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# looking for '#ifndef FILE_H'
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if not directive.str.startswith('#ifndef'):
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if conf_include_guard.get('required',1):
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report(directive,'first preprocessor directive should be include guard #ifndef','includeGuardMissing')
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phase = -1
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continue
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guard_name,guard_column = check_include_guard_name(conf_include_guard,cfg,directive)
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if guard_name == None:
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phase = -1
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continue
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pending_ifndef = directive
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phase = 1
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elif phase == 1:
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pending_ifndef = None
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# looking for '#define FILE_H'
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if not directive.str.startswith('#define'):
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report(directive,'second preprocessor directive should be include guard #define','includeGuardIncomplete')
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phase = -1
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continue
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parts = directive.str.split()
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if len(parts) == 1:
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report(directive,'syntax error','syntax')
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phase = -1
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continue
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if guard_name != parts[1]:
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report(directive,'include guard does not guard; %s != %s'%(guard_name,parts[1]),'includeGuardAwayFromDuty',severity='warning',column=guard_column)
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unguarded_include_files.remove(directive.file)
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phase = -1
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if pending_ifndef:
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report_pending_ifndef(pending_ifndef,guard_column)
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def process(dumpfiles, configfile, debugprint=False):
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conf = loadConfig(configfile)
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if conf.include_guard:
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global include_guard_header_re
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include_guard_header_re = conf.include_guard.get('RE_HEADERFILE',"[^/].*\\.h\\Z")
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for afile in dumpfiles:
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if not afile[-5:] == '.dump':
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continue
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if not args.cli:
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print('Checking ' + afile + '...')
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data = cppcheckdata.CppcheckData(afile)
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# Check File naming
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if conf.file:
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for source_file in data.files:
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basename = os.path.basename(source_file)
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good = False
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for exp in conf.file:
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good |= bool(re.match(exp, source_file))
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good |= bool(re.match(exp, basename))
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if not good:
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mockToken = DataStruct(source_file, 0, basename)
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reportNamingError(mockToken, 'File name ' + basename + ' violates naming convention')
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# Check Namespace naming
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if conf.namespace:
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for tk in data.rawTokens:
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if tk.str == 'namespace':
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mockToken = DataStruct(tk.next.file, tk.next.linenr, tk.next.str, tk.next.column)
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msgType = 'Namespace'
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for exp in conf.namespace:
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evalExpr(conf.namespace, exp, mockToken, msgType)
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unguarded_include_files = []
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if conf.include_guard:
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if conf.include_guard.get('required',1):
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unguarded_include_files = [fn for fn in data.files if re.match(include_guard_header_re,fn)]
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for cfg in data.configurations:
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if not args.cli:
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print('Checking %s, config %s...' % (afile, cfg.name))
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if conf.variable:
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for var in cfg.variables:
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if var.nameToken and var.access != 'Global' and var.access != 'Public' and var.access != 'Private':
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prev = var.nameToken.previous
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varType = prev.str
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while "*" in varType and len(varType.replace("*", "")) == 0:
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prev = prev.previous
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varType = prev.str + varType
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if debugprint:
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print("Variable Name: " + str(var.nameToken.str))
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print("original Type Name: " + str(var.nameToken.valueType.originalTypeName))
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print("Type Name: " + var.nameToken.valueType.type)
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print("Sign: " + str(var.nameToken.valueType.sign))
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print("variable type: " + varType)
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print("\n")
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print("\t-- {} {}".format(varType, str(var.nameToken.str)))
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if conf.skip_one_char_variables and len(var.nameToken.str) == 1:
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continue
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if varType in conf.variable_prefixes:
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prefix = conf.variable_prefixes[varType]
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if not var.nameToken.str.startswith(prefix):
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reportNamingError(var.typeStartToken,
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'Variable ' +
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var.nameToken.str +
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' violates naming convention',
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column=var.nameToken.column)
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mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str, var.nameToken.column)
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msgType = 'Variable'
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for exp in conf.variable:
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evalExpr(conf.variable, exp, mockToken, msgType)
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# Check Private Variable naming
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if conf.private_member:
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# TODO: Not converted yet
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for var in cfg.variables:
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if (var.access is None) or var.access != 'Private':
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continue
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mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str, var.nameToken.column)
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msgType = 'Private member variable'
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for exp in conf.private_member:
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evalExpr(conf.private_member, exp, mockToken, msgType)
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# Check Public Member Variable naming
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if conf.public_member:
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for var in cfg.variables:
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if (var.access is None) or var.access != 'Public':
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continue
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mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str, var.nameToken.column)
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msgType = 'Public member variable'
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for exp in conf.public_member:
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evalExpr(conf.public_member, exp, mockToken, msgType)
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# Check Global Variable naming
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if conf.global_variable:
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for var in cfg.variables:
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if (var.access is None) or var.access != 'Global':
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continue
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mockToken = DataStruct(var.typeStartToken.file, var.typeStartToken.linenr, var.nameToken.str, var.nameToken.column)
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msgType = 'Global variable'
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for exp in conf.global_variable:
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evalExpr(conf.global_variable, exp, mockToken, msgType)
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# Check Functions naming
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if conf.function_name:
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for token in cfg.tokenlist:
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if token.function:
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if token.function.type in ('Constructor', 'Destructor', 'CopyConstructor', 'MoveConstructor'):
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continue
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retval = token.previous.str
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prev = token.previous
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while "*" in retval and len(retval.replace("*", "")) == 0:
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prev = prev.previous
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retval = prev.str + retval
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if debugprint:
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print("\t:: {} {}".format(retval, token.function.name))
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if retval and retval in conf.function_prefixes:
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if not token.function.name.startswith(conf.function_prefixes[retval]):
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reportNamingError(token, 'Function ' + token.function.name + ' violates naming convention', column=token.column)
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mockToken = DataStruct(token.file, token.linenr, token.function.name, token.column)
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msgType = 'Function'
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for exp in conf.function_name:
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evalExpr(conf.function_name, exp, mockToken, msgType)
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# Check Class naming
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if conf.class_name:
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for fnc in cfg.functions:
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# Check if it is Constructor/Destructor
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if fnc.type == 'Constructor' or fnc.type == 'Destructor':
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mockToken = DataStruct(fnc.tokenDef.file, fnc.tokenDef.linenr, fnc.name, fnc.tokenDef.column)
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msgType = 'Class ' + fnc.type
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for exp in conf.class_name:
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evalExpr(conf.class_name, exp, mockToken, msgType)
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# Check include guard naming
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if conf.include_guard:
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check_include_guard(conf.include_guard,cfg,unguarded_include_files)
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for fn in unguarded_include_files:
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mockToken = DataStruct(fn,0,os.path.basename(fn))
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reportNamingError(mockToken,'Missing include guard','includeGuardMissing')
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if __name__ == "__main__":
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parser = cppcheckdata.ArgumentParser()
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parser.add_argument("--debugprint", action="store_true", default=False,
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help="Add debug prints")
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parser.add_argument("--configfile", type=str, default="namingng.config.json",
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help="Naming check config file")
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args = parser.parse_args()
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process(args.dumpfile, args.configfile, args.debugprint)
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sys.exit(0)
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