cppcheck/tools/matchcompiler.py

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#!/usr/bin/python
import re
import glob
def compileCmd(tok):
if tok == '%any%':
return 'true'
elif tok == '%bool%':
return 'tok->isBoolean()'
elif tok == '%char%':
return '(tok->type()==Token::eChar)'
elif tok == '%comp%':
return 'tok->isComparisonOp()'
elif tok == '%num%':
return 'tok->isNumber()'
elif tok == '%op%':
return 'tok->isOp()'
elif tok == '%or%':
return '(tok->str()=="|")'
elif tok == '%oror%':
return '(tok->str()=="||")'
elif tok == '%num%':
return 'tok->isNumber()'
elif tok == '%str%':
return '(tok->type()==Token::eString)'
elif tok == '%type%':
return '(tok->isName() && tok->varId()==0U && tok->str() != "delete")'
elif tok == '%var%':
return 'tok->isName()'
elif (len(tok)>2) and (tok[0]=="%"):
print "unhandled:" + tok
return '(tok->str()=="'+tok+'")'
def compilePattern(pattern, nr):
ret = '// ' + pattern + '\n'
ret = ret + 'static bool match' + str(nr) + '(const Token *tok) {\n'
tokens = pattern.split(' ')
gotoNextToken = ''
for tok in tokens:
if tok == '':
continue
ret = ret + gotoNextToken
gotoNextToken = ' tok = tok->next();\n'
# [abc]
if (len(tok) > 2) and (tok[0] == '[') and (tok[-1] == ']'):
ret = ret + ' if (!tok || tok->str().size()!=1U || !strchr("'+tok[1:-1]+'", tok->str()[0]))\n'
ret = ret + ' return false;\n'
# a|b|c
elif tok.find('|') > 0:
tokens2 = tok.split('|')
logicalOp = None
neg = None
if "" in tokens2:
ret = ret + ' if (tok && ('
logicalOp = ' || '
neg = ''
else:
ret = ret + ' if (!tok || !('
logicalOp = ' || '
neg = ''
first = True
for tok2 in tokens2:
if tok2 == '':
continue
if not first:
ret = ret + logicalOp
first = False
ret = ret + neg + compileCmd(tok2)
if "" in tokens2:
ret = ret + '))\n'
ret = ret + ' tok = tok->next();\n'
gotoNextToken = ''
else:
ret = ret + '))\n'
ret = ret + ' return false;\n'
# !!a
elif tok[0:2]=="!!":
ret = ret + ' if (tok && tok->str() == "' + tok[2:] + '")\n'
ret = ret + ' return false;\n'
gotoNextToken = ' tok = tok ? tok->next() : NULL;\n'
else:
ret = ret + ' if (!tok || !' + compileCmd(tok) + ')\n'
ret = ret + ' return false;\n'
ret = ret + ' return true;\n}\n'
return ret
def parseMatch(line, pos1):
parlevel = 0
args = []
argstart = 0
pos = pos1
inString = False
while pos < len(line):
if inString:
if line[pos] == '\\':
pos = pos + 1
elif line[pos] == '"':
inString = False
elif line[pos] == '"':
inString = True
elif line[pos] == '(':
parlevel = parlevel + 1
if parlevel == 1:
argstart = pos + 1
elif line[pos] == ')':
parlevel = parlevel - 1
if parlevel == 0:
ret = []
ret.append(line[pos1:pos+1])
for arg in args:
ret.append(arg)
ret.append(line[argstart:pos])
return ret
elif line[pos] == ',' and parlevel == 1:
args.append(line[argstart:pos])
argstart = pos + 1
pos = pos + 1
return None
def convertFile(srcname, destname):
fin = open(srcname, "rt")
srclines = fin.readlines()
fin.close()
matchfunctions = ''
matchfunctions = matchfunctions + '#include "token.h"\n'
matchfunctions = matchfunctions + '#include <string>\n'
matchfunctions = matchfunctions + '#include <cstring>\n'
code = ''
patternNumber = 1
for line in srclines:
while True:
pos1 = line.find('Token::Match(')
if pos1 == -1:
pos1 = line.find('Token::simpleMatch(')
if pos1 == -1:
break
res = parseMatch(line, pos1)
if res == None:
break
elif len(res) != 3:
# TODO: handle varid
break
else:
g0 = res[0]
arg1 = res[1]
arg2 = res[2]
res = re.match(r'\s*"(.+)"\s*$', arg2)
if res == None:
break # Non-const pattern - bailout
else:
arg2 = res.group(1)
line = line[:pos1]+'match'+str(patternNumber)+'('+arg1+')'+line[pos1+len(g0):]
matchfunctions = matchfunctions + compilePattern(arg2, patternNumber)
patternNumber = patternNumber + 1
code = code + line
fout = open(destname, 'wt')
fout.write(matchfunctions+code)
fout.close()
# selftests..
def assertEquals(actual,expected):
if actual!=expected:
print 'Assertion failed:'
print actual
print expected
assert actual == expected
assertEquals(parseMatch(' Token::Match(tok, ";") ',2), ['Token::Match(tok, ";")','tok',' ";"'])
assertEquals(parseMatch(' Token::Match(tok,', 2), None) # multiline Token::Match is not supported yet
assertEquals(parseMatch(' Token::Match(Token::findsimplematch(tok,")"), ";")', 2), ['Token::Match(Token::findsimplematch(tok,")"), ";")', 'Token::findsimplematch(tok,")")', ' ";"']) # inner function call
# convert all lib/*.cpp files
for f in glob.glob('lib/*.cpp'):
print f + ' => build/' + f[4:]
convertFile(f, 'build/'+f[4:])