cppcheck/test/testtokenize.cpp

803 lines
24 KiB
C++

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam,
* Leandro Penz, Kimmo Varis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/
*/
// The preprocessor that c++check uses is a bit special. Instead of generating
// the code for a known configuration, it generates the code for each configuration.
#include <cstring>
#include "testsuite.h"
#define UNIT_TESTING // Get access to "private" data in Tokenizer
#include "../src/tokenize.h"
extern std::ostringstream errout;
class TestTokenizer : public TestFixture
{
public:
TestTokenizer() : TestFixture("TestTokenizer")
{ }
private:
void run()
{
TEST_CASE(longtok);
TEST_CASE(inlineasm);
TEST_CASE(dupfuncname);
TEST_CASE(const_and_volatile_functions);
TEST_CASE(ifAddBraces1);
TEST_CASE(ifAddBraces2);
TEST_CASE(ifAddBraces3);
TEST_CASE(ifAddBraces4);
TEST_CASE(numeric_true_condition);
TEST_CASE(simplifyKnownVariables1);
TEST_CASE(simplifyKnownVariables2);
TEST_CASE(simplifyKnownVariables3);
TEST_CASE(simplifyKnownVariables4);
TEST_CASE(simplifyKnownVariables5);
TEST_CASE(multiCompare);
TEST_CASE(match1);
TEST_CASE(match2);
TEST_CASE(varid1);
TEST_CASE(varid2);
TEST_CASE(file1);
TEST_CASE(file2);
TEST_CASE(doublesharp);
TEST_CASE(simplify_function_parameters);
TEST_CASE(reduce_redundant_paranthesis); // Ticket #61
}
bool cmptok(const char *expected[], const Token *actual)
{
unsigned int i = 0;
for (; expected[i] && actual; ++i, actual = actual->next())
{
if (strcmp(expected[i], actual->aaaa()) != 0)
return false;
}
return (expected[i] == NULL && actual == NULL);
}
std::string tokenizeAndStringify(const char code[])
{
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
ostr << tok->str();
// Append newlines
if (tok->next())
{
if (tok->linenr() != tok->next()->linenr())
{
for (unsigned int i = tok->linenr();i < tok->next()->linenr();++i)
ostr << "\n";
}
else
{
ostr << " ";
}
}
}
return ostr.str();
}
void longtok()
{
std::string filedata(10000, 'a');
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(filedata);
tokenizer.tokenize(istr, "test.cpp");
// Expected result..
ASSERT_EQUALS(std::string(10000, 'a'), std::string(tokenizer.tokens()->aaaa()));
}
void inlineasm()
{
const char filedata[] = "void foo()\n"
"{\n"
" __asm\n"
" {\n"
" jmp $jump1\n"
" $jump1:\n"
" }\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(filedata);
tokenizer.tokenize(istr, "test.cpp");
// Expected result..
const char *expected[] =
{
"void",
"foo",
"(",
")",
"{",
"}",
0
};
// Compare..
ASSERT_EQUALS(true, cmptok(expected, tokenizer.tokens()));
}
void dupfuncname()
{
const char code[] = "void a()\n"
"{ }\n"
"void a(int i)\n"
"{ }\n"
"void b()\n"
"{ }\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.fillFunctionList();
ASSERT_EQUALS(1, static_cast<unsigned int>(tokenizer._functionList.size()));
ASSERT_EQUALS(std::string("b"), tokenizer._functionList[0]->aaaa());
}
void const_and_volatile_functions()
{
const char code[] = "class B\n\
{\n\
public:\n\
void a();\n\
void b() const;\n\
void c() volatile;\n\
};\n\
\n\
void B::a()\n\
{}\n\
\n\
void B::b() const\n\
{}\n\
\n\
void B::c() volatile\n\
{}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.fillFunctionList();
ASSERT_EQUALS(3, static_cast<unsigned int>(tokenizer._functionList.size()));
if (tokenizer._functionList.size() == 3)
{
ASSERT_EQUALS(std::string("a"), tokenizer._functionList[0]->str());
ASSERT_EQUALS(std::string("b"), tokenizer._functionList[1]->str());
ASSERT_EQUALS(std::string("c"), tokenizer._functionList[2]->str());
}
}
void numeric_true_condition()
{
const char code[] = "void f()\n"
"{\n"
" if (5==5);\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { { ; } }"), ostr.str());
}
void ifAddBraces1()
{
const char code[] = "void f()\n"
"{\n"
" if (a);\n"
" else ;\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
ASSERT_EQUALS(true, tokenizer.simplifyIfAddBraces());
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { if ( a ) { ; } else { ; } }"), ostr.str());
}
void ifAddBraces2()
{
const char code[] = "void f()\n"
"{\n"
" if (a) if (b) { }\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
ASSERT_EQUALS(true, tokenizer.simplifyIfAddBraces());
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { if ( a ) { if ( b ) { } } }"), ostr.str());
}
void ifAddBraces3()
{
const char code[] = "void f()\n"
"{\n"
" if (a) for (;;) { }\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
ASSERT_EQUALS(true, tokenizer.simplifyIfAddBraces());
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { if ( a ) { for ( ; ; ) { } } }"), ostr.str());
}
void ifAddBraces4()
{
const char code[] = "char * foo ()\n"
"{\n"
" char *str = malloc(10);\n"
" if (somecondition)\n"
" for ( ; ; )\n"
" { }\n"
" return str;\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
ASSERT_EQUALS(true, tokenizer.simplifyIfAddBraces());
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" char * foo ( ) { char * str = malloc ( 10 ) ; if ( somecondition ) { for ( ; ; ) { } } return str ; }"), ostr.str());
}
void simplifyKnownVariables1()
{
const char code[] = "void f()\n"
"{\n"
" int a = 10;\n"
" if (a);\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
tokenizer.simplifyKnownVariables();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { int a = 10 ; if ( 10 ) ; }"), ostr.str());
}
void simplifyKnownVariables2()
{
const char code[] = "void f()\n"
"{\n"
" int a = 10;\n"
" a = g();\n"
" if (a);\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
tokenizer.simplifyKnownVariables();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { int a = 10 ; a = g ( ) ; if ( a ) ; }"), ostr.str());
}
void simplifyKnownVariables3()
{
const char code[] = "void f()\n"
"{\n"
" int a = 4;\n"
" while(true){\n"
" break;\n"
" a = 10;\n"
" }\n"
" if (a);\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
tokenizer.simplifyKnownVariables();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { int a = 4 ; while ( true ) { break ; a = 10 ; } if ( a ) ; }"), ostr.str());
}
void simplifyKnownVariables4()
{
const char code[] = "void f()\n"
"{\n"
" int a = 4;\n"
" if ( g(a));\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
tokenizer.simplifyKnownVariables();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { int a = 4 ; if ( g ( a ) ) ; }"), ostr.str());
}
void simplifyKnownVariables5()
{
const char code[] = "void f()\n"
"{\n"
" int a = 4;\n"
" if ( a = 5 );\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
tokenizer.simplifyKnownVariables();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( ) { int a = 4 ; if ( a = 5 ) ; }"), ostr.str());
}
void multiCompare()
{
// Test for found
ASSERT_EQUALS(1, Token::multiCompare("one|two", "one"));
ASSERT_EQUALS(1, Token::multiCompare("one|two", "two"));
ASSERT_EQUALS(1, Token::multiCompare("verybig|two|", "two"));
// Test for empty string found
ASSERT_EQUALS(0, Token::multiCompare("|one|two", "notfound"));
ASSERT_EQUALS(0, Token::multiCompare("one||two", "notfound"));
ASSERT_EQUALS(0, Token::multiCompare("one|two|", "notfound"));
// Test for not found
ASSERT_EQUALS(-1, Token::multiCompare("one|two", "notfound"));
ASSERT_EQUALS(-1, Token::multiCompare("verybig|two", "s"));
ASSERT_EQUALS(-1, Token::multiCompare("one|two", "ne"));
ASSERT_EQUALS(-1, Token::multiCompare("abc|def", "a"));
}
void match1()
{
// Match "%var% | %var%"
{
const std::string code("abc|def");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(true, Token::Match(tokenizer.tokens(), "%var% | %var%"));
}
// Match "%var% || %var%"
{
const std::string code("abc||def");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(true, Token::Match(tokenizer.tokens(), "%var% || %var%"));
}
}
void match2()
{
{
const std::string code("");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(true, Token::Match(tokenizer.tokens(), "!!else"));
}
{
const std::string code("");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(false, Token::Match(tokenizer.tokens(), "!!else something"));
}
{
const std::string code("if ;");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(true, Token::Match(tokenizer.tokens(), "!!return if"));
}
{
const std::string code("if ;");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(true, Token::Match(tokenizer.tokens(), "if ; !!else"));
}
{
const std::string code("if ; something");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(true, Token::Match(tokenizer.tokens(), "if ; !!else"));
}
{
const std::string code("else");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(false, Token::Match(tokenizer.tokens(), "!!else"));
}
{
const std::string code("if ; else");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Match..
ASSERT_EQUALS(false, Token::Match(tokenizer.tokens(), "if ; !!else"));
}
}
void varid1()
{
const std::string code(";static int i = 1;\n"
"void f()\n"
"{\n"
" int i = 2;\n"
" for (int i = 0; i < 10; ++i)\n"
" i = 3;\n"
" i = 4;\n"
"}\n");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
if (tok->str() != "i")
ASSERT_EQUALS(0, tok->varId());
else if (Token::Match(tok, "i = 1"))
ASSERT_EQUALS(1, tok->varId());
else if (Token::Match(tok, "i = 2"))
ASSERT_EQUALS(2, tok->varId());
else if (Token::Match(tok, "i = 3"))
ASSERT_EQUALS(3, tok->varId());
else if (Token::Match(tok, "i = 4"))
ASSERT_EQUALS(2, tok->varId());
}
}
void varid2()
{
const std::string code("void f()\n"
"{\n"
" struct ABC abc;\n"
" abc.a = 3;\n"
" i = abc.a;\n"
"}\n");
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
if (tok->str() == "abc")
ASSERT_EQUALS(1, tok->varId());
else if (tok->str() == "a")
ASSERT_EQUALS(2, tok->varId());
else
ASSERT_EQUALS(0, tok->varId());
}
}
void file1()
{
const char code[] = "a1\n"
"#file \"b\"\n"
"b1\n"
"b2\n"
"#endfile\n"
"a3\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "a");
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
std::ostringstream ostr;
ostr << char('a' + tok->fileIndex()) << tok->linenr();
ASSERT_EQUALS(tok->str(), ostr.str());
}
}
void file2()
{
const char code[] = "a1\n"
"#file \"b\"\n"
"b1\n"
"b2\n"
"#file \"c\"\n"
"c1\n"
"c2\n"
"#endfile\n"
"b4\n"
"#endfile\n"
"a3\n"
"#file \"d\"\n"
"d1\n"
"#endfile\n"
"a5\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "a");
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
std::ostringstream ostr;
ostr << char('a' + tok->fileIndex()) << tok->linenr();
ASSERT_EQUALS(tok->str(), ostr.str());
}
}
void doublesharp()
{
const char code[] = "TEST(var,val) var##_##val = val\n";
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "");
// Stringify the tokens..
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << tok->str() << " ";
ASSERT_EQUALS("TEST ( var , val ) var ## _ ## val = val ", ostr.str());
}
void simplify_function_parameters()
{
{
const char code[] = "void f(x) int x;\n"
"{\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( int x ) { }"), ostr.str());
}
{
const char code[] = "void f(x,y) int x; char y;\n"
"{\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void f ( int x , char y ) { }"), ostr.str());
}
{
// This is not a function but the pattern is similar..
const char code[] = "void foo()\n"
"{\n"
" if (x)\n"
" int x;\n"
" { }\n"
"}\n";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void foo ( ) { if ( x ) { int x ; } { } }"), ostr.str());
}
}
// Simplify "((..))" into "(..)"
void reduce_redundant_paranthesis()
{
const char code[] = "void foo()\n"
"{\n"
" free(((void*)p));\n"
"}";
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(std::string(" void foo ( ) { free ( p ) ; }"), ostr.str());
}
};
REGISTER_TEST(TestTokenizer)