cppcheck/test/testpreprocessor.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,
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* Leandro Penz, Kimmo Varis, Vesa Pikki
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*
* 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 "testsuite.h"
#include "../src/preprocessor.h"
#include "../src/tokenize.h"
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#include <map>
#include <string>
class TestPreprocessor : public TestFixture
{
public:
TestPreprocessor() : TestFixture("TestPreprocessor")
{ }
class OurPreprocessor : public Preprocessor
{
public:
static std::string replaceIfDefined(const std::string &str)
{
return Preprocessor::replaceIfDefined(str);
}
static std::string expandMacros(std::string code)
{
return Preprocessor::expandMacros(code);
}
};
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private:
void run()
{
// Just read the code into a string. Perform simple cleanup of the code
TEST_CASE(readCode);
// The bug that started the whole work with the new preprocessor
TEST_CASE(Bug2190219);
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TEST_CASE(test1);
TEST_CASE(test2);
TEST_CASE(test3);
TEST_CASE(test4);
TEST_CASE(test5);
TEST_CASE(test6);
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// Handling include guards (don't create extra configuration for it)
TEST_CASE(includeguard);
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TEST_CASE(newlines);
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TEST_CASE(comments1);
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TEST_CASE(if0);
TEST_CASE(if1);
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TEST_CASE(elif);
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TEST_CASE(if_cond1);
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TEST_CASE(multiline1);
TEST_CASE(multiline2);
TEST_CASE(multiline3);
TEST_CASE(if_defined); // "#if defined(AAA)" => "#ifdef AAA"
// Macros..
TEST_CASE(macro_simple1);
TEST_CASE(macro_simple2);
TEST_CASE(macro_simple3);
TEST_CASE(macro_simple4);
TEST_CASE(macro_simple5);
TEST_CASE(macro_simple6);
TEST_CASE(macro_simple7);
TEST_CASE(macro_simple8);
TEST_CASE(macro_mismatch);
TEST_CASE(macro_linenumbers);
TEST_CASE(string1);
TEST_CASE(string2);
TEST_CASE(preprocessor_undef);
TEST_CASE(defdef); // Defined multiple times
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TEST_CASE(preprocessor_doublesharp);
TEST_CASE(preprocessor_include_in_str);
TEST_CASE(fmt1);
TEST_CASE(fmt2);
TEST_CASE(multi_character_character);
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TEST_CASE(stringify);
TEST_CASE(ifdefwithfile);
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}
void readCode()
{
const char code[] = " \t a //\n"
" #aa\t /* remove this */\tb \r\n";
Preprocessor p;
std::istringstream istr(code);
std::string codestr(p.read(istr));
ASSERT_EQUALS("a \n#aa b \n", codestr);
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}
void Bug2190219()
{
const char filedata[] = "int main()\n"
"{\n"
"#ifdef __cplusplus\n"
" int* flags = new int[10];\n"
"#else\n"
" int* flags = (int*)malloc((10)*sizeof(int));\n"
"#endif\n"
"\n"
"#ifdef __cplusplus\n"
" delete [] flags;\n"
"#else\n"
" free(flags);\n"
"#endif\n"
"}\n";
// Expected result..
std::map<std::string, std::string> expected;
expected[""] = "int main()\n"
"{\n"
"\n"
"\n"
"\n"
"int* flags = (int*)malloc((10)*sizeof(int));\n"
"\n"
"\n"
"\n"
"\n"
"\n"
"free(flags);\n"
"\n"
"}\n";
expected["__cplusplus"] = "int main()\n"
"{\n"
"\n"
"int* flags = new int[10];\n"
"\n"
"\n"
"\n"
"\n"
"\n"
"delete [] flags;\n"
"\n"
"\n"
"\n"
"}\n";
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// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS(expected[""], actual[""]);
ASSERT_EQUALS(expected["__cplusplus"], actual["__cplusplus"]);
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
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}
void test1()
{
const char filedata[] = "#ifdef WIN32 \n"
" abcdef\n"
"#else \n"
" qwerty\n"
"#endif \n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\nqwerty\n\n", actual[""]);
ASSERT_EQUALS("\nabcdef\n\n\n\n", actual["WIN32"]);
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
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}
void test2()
{
const char filedata[] = "# ifndef WIN32\n"
" \" # ifdef WIN32\" // a comment\n"
" # else \n"
" qwerty\n"
" # endif \n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\" # ifdef WIN32\"\n\n\n\n", actual[""]);
ASSERT_EQUALS("\n\n\nqwerty\n\n", actual["WIN32"]);
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
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}
void test3()
{
const char filedata[] = "#ifdef ABC\n"
"a\n"
"#ifdef DEF\n"
"b\n"
"#endif\n"
"c\n"
"#endif\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\n\n\n\n\n", actual[""]);
ASSERT_EQUALS("\na\n\n\n\nc\n\n", actual["ABC"]);
ASSERT_EQUALS("\na\n\nb\n\nc\n\n", actual["ABC;DEF"]);
ASSERT_EQUALS(3, static_cast<unsigned int>(actual.size()));
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}
void test4()
{
const char filedata[] = "#ifdef ABC\n"
"A\n"
"#endif\t\n"
"#ifdef ABC\n"
"A\n"
"#endif\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\n\n\n\n", actual[""]);
ASSERT_EQUALS("\nA\n\n\nA\n\n", actual["ABC"]);
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
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}
void test5()
{
const char filedata[] = "#ifdef ABC\n"
"A\n"
"#else\n"
"B\n"
"#ifdef DEF\n"
"C\n"
"#endif\n"
"#endif\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\nB\n\n\n\n\n", actual[""]);
ASSERT_EQUALS("\nA\n\n\n\n\n\n\n", actual["ABC"]);
ASSERT_EQUALS("\n\n\nB\n\nC\n\n\n", actual["DEF"]);
ASSERT_EQUALS(3, static_cast<unsigned int>(actual.size()));
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}
void test6()
{
const char filedata[] = "#if(AAA)\n"
"#if(AAA)\n";
std::istringstream istr(filedata);
const std::string actual(Preprocessor::read(istr));
// Compare results..
ASSERT_EQUALS("#if (AAA)\n#if (AAA)\n", actual);
}
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void includeguard()
{
// Handling include guards..
const char filedata[] = "#file \"abc.h\"\n"
"#ifndef abcH\n"
"#define abcH\n"
"#endif\n"
"#endfile\n"
"#ifdef ABC\n"
"#endif";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
// Expected configurations: "" and "ABC"
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
}
void ifdefwithfile()
{
// Handling include guards..
const char filedata[] = "#ifdef ABC\n"
"#file \"abc.h\"\n"
"class A{};/*\n\n\n\n\n\n\n*/\n"
"#endfile\n"
"#endif\n"
"int main() {}\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
Tokenizer tok;
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std::istringstream codeStream(actual[""]);
tok.tokenize(codeStream, "main.cpp");
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ASSERT_EQUALS("\n\n##file 0\n1:\n2:\n3:\n4: int main ( ) { }\n", tok.tokens()->stringifyList());
// Expected configurations: "" and "ABC"
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
ASSERT_EQUALS("\n#file \"abc.h\"\n\n\n\n\n\n\n\n\n#endfile\n\nint main() {}\n", actual[""]);
ASSERT_EQUALS("\n#file \"abc.h\"\nclass A{};\n\n\n\n\n\n\n\n#endfile\n\nint main() {}\n", actual["ABC"]);
}
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void newlines()
{
const char filedata[] = "\r\r\n\n";
// Preprocess
std::istringstream istr(filedata);
Preprocessor preprocessor;
ASSERT_EQUALS("\n\n\n", preprocessor.read(istr));
}
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void comments1()
{
const char filedata[] = "/*\n"
"#ifdef WIN32\n"
"#endif\n"
"*/\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\n\n", actual[""]);
ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
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}
void if0()
{
const char filedata[] = " # if /* comment */ 0 // comment\n"
"#ifdef WIN32\n"
"#endif\n"
"#endif\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\n\n", actual[""]);
ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
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}
void if1()
{
const char filedata[] = " # if /* comment */ 1 // comment\n"
"ABC\n"
" # endif \n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\nABC\n\n", actual[""]);
ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
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}
void elif()
{
const char filedata[] = "#if DEF1\n"
"ABC\n"
"#elif DEF2\n"
"DEF\n"
"#endif\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\n\n\n", actual[""]);
ASSERT_EQUALS("\nABC\n\n\n\n", actual["DEF1"]);
ASSERT_EQUALS("\n\n\nDEF\n\n", actual["DEF2"]);
ASSERT_EQUALS(3, static_cast<unsigned int>(actual.size()));
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}
void if_cond1()
{
const char filedata[] = "#if LIBVER>100\n"
" A\n"
"#else\n"
" B\n"
"#endif\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
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// Compare results..
ASSERT_EQUALS("\n\n\nB\n\n", actual[""]);
ASSERT_EQUALS("\nA\n\n\n\n", actual["LIBVER>100"]);
ASSERT_EQUALS(2, static_cast<unsigned int>(actual.size()));
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}
void multiline1()
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{
const char filedata[] = "#define str \"abc\" \\\n"
" \"def\" \n"
"abcdef = str;\n";
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// Preprocess => actual result..
std::istringstream istr(filedata);
Preprocessor preprocessor;
ASSERT_EQUALS("#define str \"abc\" \"def\" \n\nabcdef = str;\n", preprocessor.read(istr));
}
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void multiline2()
{
const char filedata[] = "#define sqr(aa) aa * \\\n"
" aa\n"
"sqr(5);\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
Preprocessor preprocessor;
ASSERT_EQUALS("#define sqr(aa) aa * aa\n\nsqr(5);\n", preprocessor.read(istr));
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}
void multiline3()
{
const char filedata[] = "const char *str = \"abc\\\n"
"def\\\n"
"ghi\"\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
Preprocessor preprocessor;
ASSERT_EQUALS("const char *str = \"abcdefghi\"\n\n\n", preprocessor.read(istr));
}
void if_defined()
{
const char filedata[] = "#if defined(AAA)\n"
"#endif\n";
// Expected result..
std::string expected("#ifdef AAA\n#endif\n");
// Compare result..
ASSERT_EQUALS(expected, OurPreprocessor::replaceIfDefined(filedata));
}
void macro_simple1()
{
const char filedata[] = "#define AAA(aa) f(aa)\n"
"AAA(5);\n";
ASSERT_EQUALS("\nf(5);\n", OurPreprocessor::expandMacros(filedata));
}
void macro_simple2()
{
const char filedata[] = "#define min(x,y) x<y?x:y\n"
"min(a(),b());\n";
ASSERT_EQUALS("\na()<b()?a():b();\n", OurPreprocessor::expandMacros(filedata));
}
void macro_simple3()
{
const char filedata[] = "#define A 4\n"
"A AA\n";
ASSERT_EQUALS("\n4 AA\n", OurPreprocessor::expandMacros(filedata));
}
void macro_simple4()
{
const char filedata[] = "#define TEMP_1 if( temp > 0 ) return 1;\n"
"TEMP_1\n";
ASSERT_EQUALS("\nif( temp > 0 ) return 1;\n", OurPreprocessor::expandMacros(filedata));
}
void macro_simple5()
{
const char filedata[] = "#define ABC if( temp > 0 ) return 1;\n"
"\n"
"void foo()\n"
"{\n"
" int temp = 0;\n"
" ABC\n"
"}\n";
ASSERT_EQUALS("\n\nvoid foo()\n{\n int temp = 0;\n if( temp > 0 ) return 1;\n}\n", OurPreprocessor::expandMacros(filedata));
}
void macro_simple6()
{
const char filedata[] = "#define ABC (a+b+c)\n"
"ABC";
ASSERT_EQUALS("\n(a+b+c)", OurPreprocessor::expandMacros(filedata));
}
void macro_simple7()
{
const char filedata[] = "#define ABC(str) str\n"
"ABC(\"(\")";
ASSERT_EQUALS("\n\"(\"", OurPreprocessor::expandMacros(filedata));
}
void macro_simple8()
{
const char filedata[] = "#define ABC 123\n"
"#define ABCD 1234\n"
"ABC ABCD";
ASSERT_EQUALS("\n\n123 1234", OurPreprocessor::expandMacros(filedata));
}
void macro_mismatch()
{
const char filedata[] = "#define AAA(aa,bb) f(aa)\n"
"AAA(5);\n";
ASSERT_EQUALS("\nAAA(5);\n", OurPreprocessor::expandMacros(filedata));
}
void macro_linenumbers()
{
const char filedata[] = "#define AAA(a)\n"
"AAA(5\n"
"\n"
")\n"
"int a;\n";
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ASSERT_EQUALS("\n"
"\n"
"\n"
"\n"
"int a;\n",
OurPreprocessor::expandMacros(filedata));
}
void string1()
{
const char filedata[] = "int main()"
"{"
" const char *a = \"#define A\n\";"
"}";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
// Compare results..
ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
ASSERT_EQUALS("int main(){ const char *a = \"#define A\n\";}\n", actual[""]);
}
void string2()
{
const char filedata[] = "#define AAA 123\n"
"str = \"AAA\"";
// Compare results..
ASSERT_EQUALS("\nstr = \"AAA\"", OurPreprocessor::expandMacros(filedata));
}
void preprocessor_undef()
{
const char filedata[] = "#define AAA int a;\n"
"#undef AAA\n"
"#define AAA char b=0;\n"
"AAA\n";
// Compare results..
ASSERT_EQUALS("\n\n\nchar b=0;\n", OurPreprocessor::expandMacros(filedata));
}
void defdef()
{
const char filedata[] = "#define AAA 123\n"
"#define AAA 456\n"
"#define AAA 789\n"
"AAA\n";
// Compare results..
ASSERT_EQUALS("\n\n\n789\n", OurPreprocessor::expandMacros(filedata));
}
void preprocessor_doublesharp()
{
const char filedata[] = "#define TEST(var,val) var = val\n"
"TEST(foo,20);\n";
// Compare results..
ASSERT_EQUALS("\nfoo=20;\n", OurPreprocessor::expandMacros(filedata));
const char filedata2[] = "#define TEST(var,val) var##_##val = val\n"
"TEST(foo,20);\n";
// Compare results..
ASSERT_EQUALS("\nfoo_20=20;\n", OurPreprocessor::expandMacros(filedata2));
}
void preprocessor_include_in_str()
{
const char filedata[] = "int main()\n"
"{\n"
"const char *a = \"#include <string>\n\";\n"
"return 0;\n"
"}\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
// Compare results..
ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
ASSERT_EQUALS("int main()\n{\nconst char *a = \"#include <string>\n\";\nreturn 0;\n}\n", actual[""]);
}
void fmt1()
{
const char filedata[] = "#define DBG(fmt...) printf(fmt)\n"
"DBG(\"[0x%lx-0x%lx)\", pstart, pend);";
// Preprocess..
std::string actual = OurPreprocessor::expandMacros(filedata);
ASSERT_EQUALS("\nprintf(\"[0x%lx-0x%lx)\", pstart, pend);", actual);
}
void fmt2()
{
const char filedata[] = "#define DBG(fmt, args...) printf(fmt, ## args)\n"
"DBG(\"hello\");";
// Preprocess..
std::string actual = OurPreprocessor::expandMacros(filedata);
ASSERT_EQUALS("\nprintf(\"hello\");", actual);
}
void multi_character_character()
{
const char filedata[] = "#define FOO 'ABCD'\n"
"int main()\n"
"{\n"
"if( FOO == 0 );\n"
"return 0;\n"
"}\n";
// Preprocess => actual result..
std::istringstream istr(filedata);
std::map<std::string, std::string> actual;
Preprocessor preprocessor;
preprocessor.preprocess(istr, actual, "file.c");
// Compare results..
ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
ASSERT_EQUALS("\nint main()\n{\nif( 'ABCD' == 0 );\nreturn 0;\n}\n", actual[""]);
}
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void stringify()
{
const char filedata[] = "#define STRINGIFY(x) #x\n"
"STRINGIFY(abc)";
// expand macros..
std::string actual = OurPreprocessor::expandMacros(filedata);
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ASSERT_EQUALS("\n\"abc\"", actual);
}
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};
REGISTER_TEST(TestPreprocessor)