testpreprocessor.cpp

cppcheck is a static C/C++ code analyzer that checks for memory leaks, mismatching allocation-deallo

                                "#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");

        // Compare results..
        ASSERT_EQUALS("\n\n\n\n", actual[""]);
        ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
    }



    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");

        // Compare results..
        ASSERT_EQUALS("\n\n\n\n", actual[""]);
        ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
    }

    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");

        // Compare results..
        ASSERT_EQUALS("\nABC\n\n", actual[""]);
        ASSERT_EQUALS(1, static_cast<unsigned int>(actual.size()));
    }


    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");

        // 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()));
    }




    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");

        // 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()));
    }


    void multiline1()
    {
        const char filedata[] = "#define str \"abc\"     \\\n"
                                "            \"def\"       \n"
                                "abcdef = str;\n";

        // Preprocess => actual result..
        std::istringstream istr(filedata);
        Preprocessor preprocessor;
        ASSERT_EQUALS("#define str \"abc\"  \"def\" \n\nabcdef = str;\n", preprocessor.read(istr));
    }

    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));
    }

    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 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[""]);
    }


    void stringify()
    {
        const char filedata[] = "#define STRINGIFY(x) #x\n"
                                "STRINGIFY(abc)";

        // expand macros..
        std::string actual = OurPreprocessor::expandMacros(filedata);

        ASSERT_EQUALS("\n\"abc\"", actual);
    }

};

REGISTER_TEST(TestPreprocessor)