C++ ostringstream::str方法代码示例

// Executes the program in "batch" mode, where the user passes some command-line args
bool slamdemoApp::doCommandLineProcess()
{
	// Declare the supported options.
	TCLAP::CmdLine cmd("2d-slam-demo", ' ', mrpt::system::MRPT_getVersion().c_str());

	TCLAP::ValueArg<std::string> arg_cfgFil("c","config","Config file to load",false,"","params.ini",cmd);
	TCLAP::SwitchArg arg_nogui("n","nogui","Don't stay in the GUI, exit after the experiment.",cmd, false);
	TCLAP::SwitchArg arg_norun("r","norun","Just load the config file, don't run it.",cmd, false);

#ifdef MRPT_OS_WINDOWS
	CMyCmdLineOut  out_buf;
	cmd.setOutput(&out_buf);
#endif

	vector<char*>  auxArgs(argc);
	for (int i=0;i<argc;i++)
	{
		wxString  s(argv[i]);
		auxArgs[i]=new char[s.size()+10];
		strcpy(auxArgs[i],s.ToUTF8().data());
	}

	// Parse arguments:
	bool res_parse = cmd.parse( argc, &auxArgs[0] );

	// Free aux mem:
	for (int i=0;i<argc;i++)
		delete[] auxArgs[i];

	if (!res_parse)
	{
#ifdef MRPT_OS_WINDOWS
		if (!out_cmdLine.str().empty())
			wxMessageBox(_U(out_cmdLine.str().c_str()),_("2d-slam-demo"));
#endif
		return false;
	}

	const std::string cfgFil = arg_cfgFil.getValue();

	if ( !mrpt::system::fileExists(cfgFil) )
	{
		cerr << "The indicated config file does not exist: " << cfgFil << endl;
#ifdef MRPT_OS_WINDOWS
		wxMessageBox(wxT("The indicated config file does not exist"),_("2d-slam-demo"));
#endif
		return false;
	}
	else
	{
		m_option_norun = arg_norun.getValue();

		if (!arg_nogui.getValue())
		{
			win->Show();
			SetTopWindow(win);
		}

		try
		{
			DoBatchExperiments(cfgFil);
		}
		catch (std::exception &e)
		{
			cerr << e.what() << endl;
#ifdef MRPT_OS_WINDOWS
			wxMessageBox(_U(e.what()),_("2d-slam-demo"));
#endif
		}
	}

	// return false to exit the program now and NOT proceed with the GUI.
	// return true to continue with the program:
	return !arg_nogui.getValue();
}

    void deallocuse1() {
        check("void f(char *p) {\n"
              "    free(p);\n"
              "    *p = 0;\n"
              "}");
        ASSERT_EQUALS("[test.c:3]: (error) Dereferencing 'p' after it is deallocated / released\n", errout.str());

        check("void f(char *p) {\n"
              "    free(p);\n"
              "    char c = *p;\n"
              "}");
        ASSERT_EQUALS("[test.c:3]: (error) Dereferencing 'p' after it is deallocated / released\n", errout.str());
    }

    void test1() {
        check("class Fred\n"
              "{\n"
              "private:\n"
              "    unsigned int f();\n"
              "public:\n"
              "    Fred();\n"
              "};\n"
              "\n"
              "Fred::Fred()\n"
              "{ }\n"
              "\n"
              "unsigned int Fred::f()\n"
              "{ }");

        ASSERT_EQUALS("[test.cpp:4]: (style) Unused private function: 'Fred::f'\n", errout.str());

        check("#file \"p.h\"\n"
              "class Fred\n"
              "{\n"
              "private:\n"
              "    unsigned int f();\n"
              "public:\n"
              "    Fred();\n"
              "};\n"
              "\n"
              "#endfile\n"
              "Fred::Fred()\n"
              "{ }\n"
              "\n"
              "unsigned int Fred::f()\n"
              "{ }");

        ASSERT_EQUALS("[p.h:4]: (style) Unused private function: 'Fred::f'\n", errout.str());

        check("#file \"p.h\"\n"
              "class Fred\n"
              "{\n"
              "private:\n"
              "void f();\n"
              "};\n"
              "\n"
              "\n"
              "#endfile\n"
              "\n"
              "void Fred::f()\n"
              "{\n"
              "}");
        ASSERT_EQUALS("[p.h:4]: (style) Unused private function: 'Fred::f'\n", errout.str());

        // Don't warn about include files which implementation we don't see
        check("#file \"p.h\"\n"
              "class Fred\n"
              "{\n"
              "private:\n"
              "void f();\n"
              "void g() {}\n"
              "};\n"
              "\n"
              "#endfile\n"
              "\n"
              "int main()\n"
              "{\n"
              "}");
        ASSERT_EQUALS("", errout.str());
    }

 ~ExpectedStreamOutput()
 {
     original_stream.rdbuf(&original_streambuf);
     original_stream << substituted_stream.str();
 }

    void sizeofVoid() {
        check("void f() {\n"
              "  int size = sizeof(void);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (portability) Behaviour of 'sizeof(void)' is not covered by the ISO C standard.\n", errout.str());

        check("void f() {\n"
              "  void* p;\n"
              "  int size = sizeof(*p);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:3]: (portability) '*p' is of type 'void', the behaviour of 'sizeof(void)' is not covered by the ISO C standard.\n", errout.str());

        check("void f() {\n"
              "  void* p = malloc(10);\n"
              "  int* p2 = p + 4;\n"
              "  int* p3 = p - 1;\n"
              "}");
        ASSERT_EQUALS("[test.cpp:3]: (portability) 'p' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n"
                      "[test.cpp:4]: (portability) 'p' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n", errout.str());

        check("void f() {\n"
              "  void* p1 = malloc(10);\n"
              "  void* p2 = malloc(5);\n"
              "  p1--;\n"
              "  p2++;\n"
              "}");
        ASSERT_EQUALS("[test.cpp:4]: (portability) 'p1' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n"
                      "[test.cpp:5]: (portability) 'p2' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n", errout.str());

        check("void f() {\n"
              "  void** p1 = malloc(10);\n"
              "  p1--;\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "  void** p1;\n"
              "  int j = sizeof(*p1);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "  void* p1[5];\n"
              "  int j = sizeof(*p1);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        // Calculations on void* with casts

        check("void f(void *data) {\n"
              "  *((unsigned char *)data + 1) = 0;\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f(void *data) {\n"
              "  *((unsigned char *)(data) + 1) = 0;\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f(void *data) {\n"
              "  unsigned char* c = (unsigned char *)(data + 1);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (portability) 'data' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n", errout.str());

        check("void f(void *data) {\n"
              "  unsigned char* c = (unsigned char *)data++;\n"
              "  unsigned char* c2 = (unsigned char *)++data;\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (portability) 'data' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n"
                      "[test.cpp:3]: (portability) 'data' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n", errout.str());

        check("void f(void *data) {\n"
              "  void* data2 = (void *)data + 1;\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (portability) 'data' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n", errout.str());

        // #4908 (void pointer as a member of a struct/class)
        check("struct FOO {\n"
              "  void *data;\n"
              "};\n"
              "char f(struct FOO foo) {\n"
              "  char x = *((char*)(foo.data+1));\n"
              "  foo.data++;\n"
              "  return x;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:5]: (portability) 'foo.data' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n"
                      "[test.cpp:6]: (portability) 'foo.data' is of type 'void *'. When using void pointers in calculations, the behaviour is undefined.\n", errout.str());

        check("struct FOO {\n"
              "  void *data;\n"
              "};\n"
              "char f(struct FOO foo) {\n"
              "  char x = *((char*)foo.data+1);\n"
              "  return x;\n"
              "}\n"
              "char f2(struct FOO foo) {\n"
              "  char x = *((char*)((FOO)foo).data + 1);\n"
              "  return x;\n"
              "}\n"
              "char f3(struct FOO* foo) {\n"
//.........这里部分代码省略.........

 void division2() {
     check("void f()\n"
           "{\n"
           "    int ivar = -2;\n"
           "    unsigned int uvar = 2;\n"
           "    return uvar / ivar;\n"
           "}", true);
     ASSERT_EQUALS("[test.cpp:5]: (warning, inconclusive) Division with signed and unsigned operators. The result might be wrong.\n", errout.str());
 }

void Logger::error(std::ostringstream& stream) throw()
{
   string text = stream.str();
   error(text.data());
}

 void structmember() {
     check("struct Foo { int *p };\n"
           "void f(struct Foo *foo) {\n"
           "    int i = foo->p;\n"
           "}");
     TODO_ASSERT_EQUALS("[test.cpp:3]: (portability) Assigning a pointer to an integer is not portable.\n", "", errout.str());
 }

    void sizeofForNumericParameter() {
        check("void f() {\n"
              "    std::cout << sizeof(10) << std::endl;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:2]: (warning) Suspicious usage of 'sizeof' with a numeric constant as parameter.\n", errout.str());

        check("void f() {\n"
              "    std::cout << sizeof(-10) << std::endl;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:2]: (warning) Suspicious usage of 'sizeof' with a numeric constant as parameter.\n", errout.str());

        check("void f() {\n"
              "    std::cout << sizeof 10  << std::endl;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:2]: (warning) Suspicious usage of 'sizeof' with a numeric constant as parameter.\n", errout.str());

        check("void f() {\n"
              "    std::cout << sizeof -10  << std::endl;\n"
              "}\n");
        ASSERT_EQUALS("[test.cpp:2]: (warning) Suspicious usage of 'sizeof' with a numeric constant as parameter.\n", errout.str());
    }

void Logger::always(std::ostringstream& stream) throw()
{
   string text = stream.str();
   always(text.data());
}

    void checkPointerSizeof() {
        check("void f() {\n"
              "    char *x = malloc(10);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof(*x));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof(int));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof(x));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof(&x));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = malloc(100 * sizeof(x));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof(x) * 100);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof *x);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    int *x = malloc(sizeof x);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = malloc(100 * sizeof x);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = calloc(1, sizeof(*x));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    int *x = calloc(1, sizeof *x);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    int *x = calloc(1, sizeof(x));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = calloc(1, sizeof x);\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("[test.cpp:2]: (warning, inconclusive) Size of pointer 'x' used instead of size of its data.\n", errout.str());

        check("void f() {\n"
              "    int *x = calloc(1, sizeof(int));\n"
              "    free(x);\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    char x[10];\n"
              "    memset(x, 0, sizeof(x));\n"
              "}");
        ASSERT_EQUALS("", errout.str());

        check("void f() {\n"
              "    char* x[10];\n"
              "    memset(x, 0, sizeof(x));\n"
//.........这里部分代码省略.........

void Logger::buffer(std::ostringstream& stream) throw()
{
   string text = stream.str();
   buffer(text.data());
}

 void deallocThrow()
 {
     check("int * p;\n"
           "void f(int x)\n"
           "{\n"
           "    delete p;\n"
           "    if (x)\n"
           "        throw 123;\n"
           "    p = 0;\n"
           "}\n");
     ASSERT_EQUALS("[test.cpp:6]: (error) Throwing exception in invalid state, p points at deallocated memory\n", errout.str());
 }

void Logger::info(std::ostringstream& stream) throw()
{
   string text = stream.str();
   info(text.data());
}

void Logger::trace(std::ostringstream& stream) throw()
{
   string text = stream.str();
   trace(text.data());
}