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cppcheck/test/testsimplifytokens.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam,
* Leandro Penz, Kimmo Varis, Vesa Pikki
*
* 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/
*/
#include "testsuite.h"
#include "../src/tokenize.h"
#include <sstream>
extern std::ostringstream errout;
// A test tokenizer where protected functions are made public
class OpenTokenizer : public Tokenizer
{
public:
OpenTokenizer(const char code[]) : Tokenizer()
{
std::istringstream istr(code);
tokenize(istr, "test.cpp");
}
virtual ~OpenTokenizer()
{ }
bool elseif_()
{
return elseif();
}
};
class TestSimplifyTokens : public TestFixture
{
public:
TestSimplifyTokens() : TestFixture("TestSimplifyTokens")
{ }
private:
void run()
{
TEST_CASE(cast0);
TEST_CASE(cast1);
TEST_CASE(iftruefalse);
TEST_CASE(combine_strings);
TEST_CASE(double_plus);
TEST_CASE(redundant_plus);
TEST_CASE(parantheses1);
TEST_CASE(paranthesesVar); // Remove redundant parantheses around variable .. "( %var% )"
TEST_CASE(declareVar);
TEST_CASE(elseif1);
TEST_CASE(sizeof1);
TEST_CASE(sizeof2);
TEST_CASE(sizeof3);
TEST_CASE(sizeof4);
TEST_CASE(sizeof5);
TEST_CASE(sizeof6);
TEST_CASE(casting);
TEST_CASE(template1);
TEST_CASE(template2);
TEST_CASE(template3);
TEST_CASE(namespaces);
}
std::string tok(const char code[])
{
std::istringstream istr(code);
Tokenizer tokenizer;
tokenizer.tokenize(istr, "test.cpp");
tokenizer.simplifyTokenList();
std::string ret;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
{
ret += tok->str() + " ";
}
return ret;
}
void cast0()
{
const char code1[] = " if ( p == (char *)0 ) ";
const char code2[] = " if ( p == 0 ) ";
ASSERT_EQUALS(tok(code1), tok(code2));
}
void cast1()
{
const char code[] = "return (unsigned char *)str;";
const char expected[] = "return str;";
ASSERT_EQUALS(tok(expected), tok(code));
}
void iftruefalse()
{
{
const char code1[] = " void f() { int a; bool use = false; if( use ) { a=0; } else {a=1;} } ";
const char code2[] = " void f() { int a; bool use = false; {a=1;} } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; bool use = true; if( use ) { a=0; } else {a=1;} } ";
const char code2[] = " void f() { int a; bool use = true; { a=0; } } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; int use = 5; if( use ) { a=0; } else {a=1;} } ";
const char code2[] = " void f() { int a; int use = 5; { a=0; } } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; int use = 0; if( use ) { a=0; } else {a=1;} } ";
const char code2[] = " void f() { int a; int use = 0; {a=1;} } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; bool use = false; if( use ) a=0; else a=1; int c=1; } ";
const char code2[] = " void f() { int a; bool use = false; { a=1; } int c=1; } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; bool use = true; if( use ) a=0; else a=1; int c=1; } ";
const char code2[] = " void f() { int a; bool use = true; { a=0; } int c=1; } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; bool use = false; if( use ) a=0; else if( bb ) a=1; int c=1; } ";
const char code2[] = " void f ( ) { int a ; bool use ; use = false ; { if ( bb ) { a = 1 ; } } int c ; c = 1 ; } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; bool use = true; if( use ) a=0; else if( bb ) a=1; int c=1; } ";
const char code2[] = " void f() { int a; bool use = true; { a=0;} int c=1; } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { int a; bool use = true; if( use ) a=0; else if( bb ) a=1; else if( cc ) a=33; else { gg = 0; } int c=1; } ";
const char code2[] = " void f() { int a; bool use = true; { a=0; }int c=1; } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { if( aa ) { a=0; } else if( true ) a=1; else { a=2; } } ";
const char code2[] = " void f ( ) { if ( aa ) { a = 0 ; } else { { a = 1 ; } } } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
{
const char code1[] = " void f() { if( aa ) { a=0; } else if( false ) a=1; else { a=2; } } ";
const char code2[] = " void f ( ) { if ( aa ) { a = 0 ; } else { { a = 2 ; } } } ";
ASSERT_EQUALS(tok(code2), tok(code1));
}
}
void combine_strings()
{
const char code1[] = "void foo()\n"
"{\n"
"const char *a =\n"
"{\n"
"\"hello \"\n"
"\"world\"\n"
"};\n"
"}\n";
const char code2[] = "void foo()\n"
"{\n"
"const char *a =\n"
"{\n"
"\"hello world\"\n"
"};\n"
"}\n";
ASSERT_EQUALS(tok(code2), tok(code1));
}
void double_plus()
{
{
const char code1[] = "void foo( int a )\n"
"{\n"
"a++;\n"
"a--;\n"
"++a;\n"
"--a;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a ) { a ++ ; a -- ; ++ a ; -- a ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a )\n"
"{\n"
"a=a+a;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a ) { a = a + a ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a+++b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a ++ + b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a---b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a -- - b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a--+b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a -- + b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a++-b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a ++ - b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a+--b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a + -- b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a-++b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a - ++ b ; } ", tok(code1));
}
}
void redundant_plus()
{
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a + + b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a + b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a + + + b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a + b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a + - b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a - b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a - + b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a - b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a - - b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a + b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a - + - b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a + b ; } ", tok(code1));
}
{
const char code1[] = "void foo( int a, int b )\n"
"{\n"
"a=a - - - b;\n"
"}\n";
ASSERT_EQUALS("void foo ( int a , int b ) { a = a - b ; } ", tok(code1));
}
}
void parantheses1()
{
const char code1[] = "<= (10+100);";
ASSERT_EQUALS("<= 110 ; ", tok(code1));
}
void paranthesesVar()
{
// remove parantheses..
ASSERT_EQUALS("= p ; ", tok("= (p);"));
ASSERT_EQUALS("if ( a < p ) { ", tok("if(a<(p))"));
// keep parantheses..
ASSERT_EQUALS("= a ; ", tok("= (char)a;"));
ASSERT_EQUALS("cast < char * > ( p ) ", tok("cast<char *>(p)"));
}
void declareVar()
{
const char code[] = "void f ( ) { char str [ 100 ] = \"100\" ; } ";
ASSERT_EQUALS(code, tok(code));
}
std::string elseif(const char code[])
{
std::istringstream istr(code);
OpenTokenizer tokenizer(code);
tokenizer.elseif_();
return tokenizer.tokens()->stringifyList(false);
}
void elseif1()
{
const char code[] = "else if(ab) { cd } else { ef }gh";
ASSERT_EQUALS("\n\n##file 0\n1: else { if ( ab ) { cd } else { ef } } gh\n", elseif(code));
}
// Simplify 'sizeof'..
std::string sizeof_(const char code[])
{
// tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
tokenizer.setVarId();
tokenizer.simplifyTokenList();
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
return ostr.str();
}
void sizeof1()
{
const char code1[] = " struct ABC *abc = malloc(sizeof(*abc)); ";
const char code2[] = " struct ABC *abc = malloc(100); ";
const char code3[] = " struct ABC *abc = malloc(sizeof *abc ); ";
ASSERT_EQUALS(tok(code1), tok(code2));
ASSERT_EQUALS(tok(code2), tok(code3));
}
void sizeof2()
{
const char code[] = "void foo()\n"
"{\n"
" int i[4];\n"
" sizeof(i);\n"
" sizeof(*i);\n"
"}\n";
ASSERT_EQUALS(std::string(" void foo ( ) { int i [ 4 ] ; 16 ; 4 ; }"), sizeof_(code));
}
void sizeof3()
{
const char code[] = "static int i[4];\n"
"void f()\n"
"{\n"
" int i[10];\n"
" sizeof(i);\n"
"}\n";
ASSERT_EQUALS(std::string(" static int i [ 4 ] ; void f ( ) { int i [ 10 ] ; 40 ; }"), sizeof_(code));
}
void sizeof4()
{
const char code[] = "int i[10];\n"
"sizeof(i[0]);\n";
ASSERT_EQUALS(std::string(" int i [ 10 ] ; 4 ;"), sizeof_(code));
}
void sizeof5()
{
const char code[] =
"for (int i = 0; i < sizeof(g_ReservedNames[0]); i++)"
"{}";
ASSERT_EQUALS(std::string(" for ( int i = 0 ; i < 100 ; i ++ ) { }"), sizeof_(code));
}
void sizeof6()
{
const char code[] = ";int i;\n"
"sizeof(i);\n";
std::ostringstream expected;
expected << " ; int i ; " << sizeof(int) << " ;";
ASSERT_EQUALS(expected.str(), sizeof_(code));
}
void casting()
{
const char code[] = "void f()\n"
"{\n"
"for (int i = 0; i < static_cast<int>(3); ++i) {}\n"
"}\n";
const std::string expected(" void f ( ) { for ( int i = 0 ; i < 3 ; ++ i ) { } }");
ASSERT_EQUALS(expected, sizeof_(code));
}
void template1()
{
const char code[] = "template <classname T> void f(T val) { T a; }\n"
"f<int>(10);";
const std::string expected(" "
"template < classname T > void f ( T val ) { T a ; } "
"f<int> ( 10 ) ; "
"void f<int> ( int val ) { int a ; }");
ASSERT_EQUALS(expected, sizeof_(code));
}
void template2()
{
const char code[] = "template <classname T> class Fred { T a; };\n"
"Fred<int> fred;";
const std::string expected(" "
"template < classname T > class Fred { T a ; } ; "
"Fred<int> fred ; "
"class Fred<int> { int a ; }");
ASSERT_EQUALS(expected, sizeof_(code));
}
void template3()
{
const char code[] = "template <classname T, int sz> class Fred { T data[sz]; };\n"
"Fred<float,4> fred;";
const std::string expected(" "
"template < classname T , int sz > class Fred { T data [ sz ] ; } ; "
"Fred<float,4> fred ; "
"class Fred<float,4> { float data [ 4 ] ; }");
ASSERT_EQUALS(expected, sizeof_(code));
}
void namespaces()
{
{
const char code[] = "using namespace std; namespace a{ namespace b{ void f(){} } }";
const std::string expected(" using namespace std ; void f ( ) { }");
ASSERT_EQUALS(expected, sizeof_(code));
}
{
const char code[] = "namespace b{ void f(){} }";
const std::string expected(" void f ( ) { }");
ASSERT_EQUALS(expected, sizeof_(code));
}
}
};
REGISTER_TEST(TestSimplifyTokens)
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