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testother.cpp
6945 lines (6069 loc) · 240 KB
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testother.cpp
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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2013 Daniel Marjamäki and Cppcheck team.
*
* 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 "preprocessor.h"
#include "tokenize.h"
#include "checkother.h"
#include "testsuite.h"
#include <sstream>
extern std::ostringstream errout;
class TestOther : public TestFixture {
public:
TestOther() : TestFixture("TestOther")
{ }
private:
void run() {
TEST_CASE(oppositeInnerCondition);
TEST_CASE(assignBoolToPointer);
TEST_CASE(emptyBrackets);
TEST_CASE(zeroDiv1);
TEST_CASE(zeroDiv2);
TEST_CASE(zeroDiv3);
TEST_CASE(zeroDiv4);
TEST_CASE(zeroDiv5);
TEST_CASE(zeroDiv6);
TEST_CASE(sprintf1); // Dangerous usage of sprintf
TEST_CASE(sprintf2);
TEST_CASE(sprintf3);
TEST_CASE(sprintf4); // struct member
TEST_CASE(strPlusChar1); // "/usr" + '/'
TEST_CASE(strPlusChar2); // "/usr" + ch
TEST_CASE(strPlusChar3); // ok: path + "/sub" + '/'
TEST_CASE(varScope1);
TEST_CASE(varScope2);
TEST_CASE(varScope3);
TEST_CASE(varScope4);
TEST_CASE(varScope5);
TEST_CASE(varScope6);
TEST_CASE(varScope7);
TEST_CASE(varScope8);
TEST_CASE(varScope9); // classes may have extra side-effects
TEST_CASE(varScope10); // Undefined macro FOR
TEST_CASE(varScope11); // #2475 - struct initialization is not inner scope
TEST_CASE(varScope12);
TEST_CASE(varScope13); // variable usage in inner loop
TEST_CASE(varScope14);
TEST_CASE(oldStylePointerCast);
TEST_CASE(invalidPointerCast);
TEST_CASE(dangerousStrolUsage);
TEST_CASE(passedByValue);
TEST_CASE(mathfunctionCall1);
TEST_CASE(cctypefunctionCall);
TEST_CASE(sizeofsizeof);
TEST_CASE(sizeofCalculation);
TEST_CASE(switchRedundantAssignmentTest);
TEST_CASE(switchRedundantOperationTest);
TEST_CASE(switchRedundantBitwiseOperationTest);
TEST_CASE(switchFallThroughCase);
TEST_CASE(unreachableCode);
TEST_CASE(suspiciousCase);
TEST_CASE(suspiciousEqualityComparison);
TEST_CASE(selfAssignment);
TEST_CASE(trac1132);
TEST_CASE(testMisusedScopeObjectDoesNotPickFunction1);
TEST_CASE(testMisusedScopeObjectDoesNotPickFunction2);
TEST_CASE(testMisusedScopeObjectPicksClass);
TEST_CASE(testMisusedScopeObjectPicksStruct);
TEST_CASE(testMisusedScopeObjectDoesNotPickIf);
TEST_CASE(testMisusedScopeObjectDoesNotPickConstructorDeclaration);
TEST_CASE(testMisusedScopeObjectDoesNotPickFunctor);
TEST_CASE(testMisusedScopeObjectDoesNotPickLocalClassConstructors);
TEST_CASE(testMisusedScopeObjectDoesNotPickUsedObject);
TEST_CASE(testMisusedScopeObjectDoesNotPickPureC);
TEST_CASE(testMisusedScopeObjectDoesNotPickNestedClass);
TEST_CASE(trac2071);
TEST_CASE(trac2084);
TEST_CASE(trac3693);
TEST_CASE(assignmentInAssert);
TEST_CASE(modulo);
TEST_CASE(incorrectLogicOperator1);
TEST_CASE(incorrectLogicOperator2);
TEST_CASE(incorrectLogicOperator3);
TEST_CASE(secondAlwaysTrueFalseWhenFirstTrueError);
TEST_CASE(incorrectLogicOp_condSwapping);
TEST_CASE(sameExpression);
TEST_CASE(memsetZeroBytes);
TEST_CASE(sizeofForArrayParameter);
TEST_CASE(sizeofForNumericParameter);
TEST_CASE(suspiciousSizeofCalculation);
TEST_CASE(clarifyCalculation);
TEST_CASE(clarifyStatement);
TEST_CASE(clarifyCondition1); // if (a = b() < 0)
TEST_CASE(clarifyCondition2); // if (a & b == c)
TEST_CASE(clarifyCondition3); // if (! a & b)
TEST_CASE(clarifyCondition4); // ticket #3110
TEST_CASE(clarifyCondition5); // #3609 CWinTraits<WS_CHILD|WS_VISIBLE>..
TEST_CASE(clarifyCondition6); // #3818
TEST_CASE(bitwiseOnBoolean); // if (bool & bool)
TEST_CASE(comparisonOfBoolExpressionWithInt1);
TEST_CASE(comparisonOfBoolExpressionWithInt2);
TEST_CASE(comparisonOfBoolExpressionWithInt3);
TEST_CASE(incorrectStringCompare);
TEST_CASE(incrementBoolean);
TEST_CASE(comparisonOfBoolWithInt1);
TEST_CASE(comparisonOfBoolWithInt2);
TEST_CASE(comparisonOfBoolWithInt3);
TEST_CASE(comparisonOfBoolWithInt4);
TEST_CASE(comparisonOfBoolWithInt5);
TEST_CASE(comparisonOfBoolWithInt6); // #4224 - integer is casted to bool
TEST_CASE(checkComparisonOfFuncReturningBool1);
TEST_CASE(checkComparisonOfFuncReturningBool2);
TEST_CASE(checkComparisonOfFuncReturningBool3);
TEST_CASE(checkComparisonOfFuncReturningBool4);
TEST_CASE(checkComparisonOfFuncReturningBool5);
TEST_CASE(checkComparisonOfFuncReturningBool6);
TEST_CASE(checkComparisonOfBoolWithBool);
TEST_CASE(duplicateIf);
TEST_CASE(duplicateIf1); // ticket 3689
TEST_CASE(duplicateBranch);
TEST_CASE(duplicateBranch1); // tests extracted by http://www.viva64.com/en/b/0149/ ( Comparison between PVS-Studio and cppcheck ): Errors detected in Quake 3: Arena by PVS-Studio: Fragement 2
TEST_CASE(duplicateExpression1);
TEST_CASE(duplicateExpression2); // ticket #2730
TEST_CASE(duplicateExpression3); // ticket #3317
TEST_CASE(duplicateExpression4); // ticket #3354 (++)
TEST_CASE(duplicateExpression5); // ticket #3749 (macros with same values)
TEST_CASE(alwaysTrueFalseStringCompare);
TEST_CASE(suspiciousStringCompare);
TEST_CASE(checkPointerSizeof);
TEST_CASE(checkSignOfUnsignedVariable);
TEST_CASE(checkSignOfPointer);
TEST_CASE(checkForSuspiciousSemicolon1);
TEST_CASE(checkForSuspiciousSemicolon2);
TEST_CASE(checkDoubleFree);
TEST_CASE(checkInvalidFree);
TEST_CASE(checkRedundantCopy);
TEST_CASE(checkNegativeShift);
TEST_CASE(incompleteArrayFill);
TEST_CASE(redundantVarAssignment);
TEST_CASE(redundantMemWrite);
TEST_CASE(varFuncNullUB);
}
void check(const char code[], const char *filename = NULL, bool experimental = false, bool inconclusive = true) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.addEnabled("style");
settings.addEnabled("portability");
settings.addEnabled("performance");
settings.inconclusive = inconclusive;
settings.experimental = experimental;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, filename ? filename : "test.cpp");
// Check..
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.runChecks(&tokenizer, &settings, this);
// Simplify token list..
tokenizer.simplifyTokenList();
checkOther.runSimplifiedChecks(&tokenizer, &settings, this);
}
class SimpleSuppressor: public ErrorLogger {
public:
SimpleSuppressor(Settings &settings, ErrorLogger *next)
: _settings(settings), _next(next)
{ }
virtual void reportOut(const std::string &outmsg) {
_next->reportOut(outmsg);
}
virtual void reportErr(const ErrorLogger::ErrorMessage &msg) {
if (!msg._callStack.empty() && !_settings.nomsg.isSuppressed(msg._id, msg._callStack.begin()->getfile(), msg._callStack.begin()->line))
_next->reportErr(msg);
}
private:
Settings &_settings;
ErrorLogger *_next;
};
void check_preprocess_suppress(const char precode[], const char *filename = NULL) {
// Clear the error buffer..
errout.str("");
if (filename == NULL)
filename = "test.cpp";
Settings settings;
settings.addEnabled("style");
settings.addEnabled("performance");
settings.experimental = true;
// Preprocess file..
SimpleSuppressor logger(settings, this);
Preprocessor preprocessor(&settings, &logger);
std::list<std::string> configurations;
std::string filedata = "";
std::istringstream fin(precode);
preprocessor.preprocess(fin, filedata, configurations, filename, settings._includePaths);
const std::string code = preprocessor.getcode(filedata, "", filename);
// Tokenize..
Tokenizer tokenizer(&settings, &logger);
std::istringstream istr(code);
tokenizer.tokenize(istr, filename);
tokenizer.simplifyGoto();
// Check..
CheckOther checkOther(&tokenizer, &settings, &logger);
checkOther.checkSwitchCaseFallThrough();
checkOther.checkAlwaysTrueOrFalseStringCompare();
logger.reportUnmatchedSuppressions(settings.nomsg.getUnmatchedLocalSuppressions(filename));
}
void oppositeInnerCondition() {
check("void foo(int a, int b)\n"
"{\n"
" if(a==b)\n"
" if(a!=b)\n"
" cout << a;\n"
"}", "test.cpp", true, true);
ASSERT_EQUALS("[test.cpp:3]: (warning, inconclusive) Opposite conditions in nested 'if' blocks lead to a dead code block.\n", errout.str());
check("void foo(int i)\n"
"{\n"
" if(i > 5) {\n"
" i = bar();\n"
" if(i < 5) {\n"
" cout << a;\n"
" }\n"
" }\n"
"}", "test.cpp", true, true);
ASSERT_EQUALS("", errout.str());
check("void foo(int& i)\n"
"{\n"
" i=6;\n"
"}\n"
"void bar(int i)\n"
"{\n"
" if(i>5){\n"
" foo(i);\n"
" if(i<5){\n"
" }\n"
" }\n"
"}", "test.cpp", true, true);
ASSERT_EQUALS("", errout.str());
}
void assignBoolToPointer() {
check("void foo(bool *p) {\n"
" p = false;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (error) Boolean value assigned to pointer.\n", errout.str());
}
void emptyBrackets() {
check("{\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void zeroDiv1() {
check("void foo()\n"
"{\n"
" int a = 0;\n"
" double b = 1.;\n"
" cout<<b/a;\n"
"}");
ASSERT_EQUALS("[test.cpp:5]: (error) Division by zero.\n", errout.str());
}
void zeroDiv2() {
check("void foo()\n"
"{\n"
" int sum = 0;\n"
" int n = 100;\n"
" for(int i = 0; i < n; i ++)\n"
" {\n"
" sum += i;\n"
" }\n"
" cout<<b/sum;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" int a = 0 ? (2/0) : 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void zeroDiv3() {
check("void f()\n"
"{\n"
" div_t divresult = div (1,0);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
}
void zeroDiv4() {
check("void f()\n"
"{\n"
" long a = b / 0x6;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" long a = b / 0x0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
check("void f()\n"
"{\n"
" long a = b / 0L;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
check("void f()\n"
"{\n"
" long a = b / 0ul;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
check("void f()\n"
"{\n"
" div_t divresult = div (1,0L);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
check("void f()\n"
"{\n"
" div_t divresult = div (1,0x5);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// Don't warn about floating points (gcc doesn't warn either)
// and floating points are handled differently than integers.
check("void f()\n"
"{\n"
" long a = b / 0.0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" long a = b / 0.5;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// Don't warn about 0.0
check("void f()\n"
"{\n"
" div_t divresult = div (1,0.0);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void f()\n"
"{\n"
" div_t divresult = div (1,0.5);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void zeroDiv5() {
check("void f()\n"
"{ { {\n"
" long a = b / 0;\n"
"} } }\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
}
void zeroDiv6() {
check("void f()\n"
"{ { {\n"
" int a = b % 0;\n"
"} } }\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Division by zero.\n", errout.str());
}
void sprintfUsage(const char code[]) {
// Clear the error buffer..
errout.str("");
Settings settings;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
//tokenizer.tokens()->printOut( "tokens" );
// Check for redundant code..
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.invalidFunctionUsage();
}
void sprintf1() {
sprintfUsage("void foo()\n"
"{\n"
" char buf[100];\n"
" sprintf(buf,\"%s\",buf);\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (error) Undefined behavior: Variable 'buf' is used as parameter and destination in s[n]printf().\n", errout.str());
}
void sprintf2() {
sprintfUsage("void foo()\n"
"{\n"
" char buf[100];\n"
" sprintf(buf,\"%i\",sizeof(buf));\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void sprintf3() {
sprintfUsage("void foo()\n"
"{\n"
" char buf[100];\n"
" sprintf(buf,\"%i\",sizeof(buf));\n"
" if (buf[0]);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void sprintf4() {
sprintfUsage("struct A\n"
"{\n"
" char filename[128];\n"
"};\n"
"\n"
"void foo()\n"
"{\n"
" const char* filename = \"hello\";\n"
" struct A a;\n"
" snprintf(a.filename, 128, \"%s\", filename);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void strPlusChar(const char code[]) {
// Clear the error buffer..
errout.str("");
Settings settings;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Check for redundant code..
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.strPlusChar();
}
void strPlusChar1() {
// Strange looking pointer arithmetic..
strPlusChar("void foo()\n"
"{\n"
" const char *p = \"/usr\" + '/';\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (error) Unusual pointer arithmetic. A value of type 'char' is added to a string literal.\n", errout.str());
}
void strPlusChar2() {
// Strange looking pointer arithmetic..
strPlusChar("void foo()\n"
"{\n"
" char ch = 1;\n"
" const char *p = ch + \"/usr\";\n"
"}\n");
ASSERT_EQUALS("", errout.str());
// Strange looking pointer arithmetic..
strPlusChar("void foo()\n"
"{\n"
" int i = 1;\n"
" const char* psz = \"Bla\";\n"
" const std::string str = i + psz;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void strPlusChar3() {
// Strange looking pointer arithmetic..
strPlusChar("void foo()\n"
"{\n"
" std::string temp = \"/tmp\";\n"
" std::string path = temp + '/' + \"sub\" + '/';\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope(const char code[]) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.addEnabled("style");
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
// Check for redundant code..
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.checkVariableScope();
}
void varScope1() {
varScope("unsigned short foo()\n"
"{\n"
" test_client CClient;\n"
" try\n"
" {\n"
" if (CClient.Open())\n"
" {\n"
" return 0;\n"
" }\n"
" }\n"
" catch (...)\n"
" {\n"
" return 2;\n"
" }\n"
"\n"
" try\n"
" {\n"
" CClient.Close();\n"
" }\n"
" catch (...)\n"
" {\n"
" return 2;\n"
" }\n"
"\n"
" return 1;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope2() {
varScope("int foo()\n"
"{\n"
" Error e;\n"
" e.SetValue(12);\n"
" throw e;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope3() {
varScope("void foo()\n"
"{\n"
" int i;\n"
" int *p = 0;\n"
" if (abc)\n"
" {\n"
" p = &i;\n"
" }\n"
" *p = 1;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope4() {
varScope("void foo()\n"
"{\n"
" int i;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope5() {
varScope("void f(int x)\n"
"{\n"
" int i = 0;\n"
" if (x) {\n"
" for ( ; i < 10; ++i) ;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
varScope("void f(int x) {\n"
" const unsigned char i = 0;\n"
" if (x) {\n"
" for ( ; i < 10; ++i) ;\n"
" }\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
varScope("void f(int x)\n"
"{\n"
" int i = 0;\n"
" if (x) {b()}\n"
" else {\n"
" for ( ; i < 10; ++i) ;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
}
void varScope6() {
varScope("void f(int x)\n"
"{\n"
" int i = x;\n"
" if (a) {\n"
" x++;\n"
" }\n"
" if (b) {\n"
" c(i);\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
varScope("void f()\n"
"{\n"
"int foo = 0;\n"
"std::vector<int> vec(10);\n"
"BOOST_FOREACH(int& i, vec)\n"
"{\n"
" foo += 1;\n"
" if(foo == 10)\n"
" {\n"
" return 0;\n"
" }\n"
"}\n"
"}\n");
ASSERT_EQUALS("", errout.str());
varScope("void f(int &x)\n"
"{\n"
" int n = 1;\n"
" do\n"
" {\n"
" ++n;\n"
" ++x;\n"
" } while (x);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope7() {
varScope("void f(int x)\n"
"{\n"
" int y = 0;\n"
" b(y);\n"
" if (x) {\n"
" y++;\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope8() {
varScope("void test() {\n"
" float edgeResistance=1;\n"
" std::vector<int> edges;\n"
" BOOST_FOREACH(int edge, edges) {\n"
" edgeResistance = (edge+1) / 2.0;\n"
" }\n"
"}\n");
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'edgeResistance' can be reduced.\n", errout.str());
}
void varScope9() {
// classes may have extra side effects
varScope("class fred {\n"
"public:\n"
" void x();\n"
"};\n"
"void test(int a) {\n"
" fred f;\n"
" if (a == 2) {\n"
" f.x();\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope10() {
// classes may have extra side effects
varScope("int f()\n"
"{\n"
" int x = 0;\n"
" FOR {\n"
" foo(x++);\n"
" }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope11() {
varScope("int f() {\n"
" int x = 0;\n"
" AB ab = { x, 0 };\n"
"}\n");
ASSERT_EQUALS("", errout.str());
varScope("int f() {\n"
" int x = 0;\n"
" if (a == 0) { ++x; }\n"
" AB ab = { x, 0 };\n"
"}\n");
ASSERT_EQUALS("", errout.str());
varScope("int f() {\n"
" int x = 0;\n"
" if (a == 0) { ++x; }\n"
" if (a == 1) { AB ab = { x, 0 }; }\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void varScope12() {
varScope("void f(int x) {\n"
" int i[5];\n"
" int* j = y;\n"
" if (x)\n"
" foo(i);\n"
" foo(j);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'i' can be reduced.\n", errout.str());
varScope("void f(int x) {\n"
" int i[5];\n"
" int* j;\n"
" if (x)\n"
" j = i;\n"
" foo(j);\n"
"}");
ASSERT_EQUALS("", errout.str());
varScope("void f(int x) {\n"
" const bool b = true;\n"
" x++;\n"
" if (x == 5)\n"
" foo(b);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (style) The scope of the variable 'b' can be reduced.\n", errout.str());
varScope("void f(int x) {\n"
" const bool b = x;\n"
" x++;\n"
" if (x == 5)\n"
" foo(b);\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void varScope13() {
// #2770
varScope("void f() {\n"
" int i = 0;\n"
" forever {\n"
" if (i++ == 42) { break; }\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void varScope14() {
// #3941
varScope("void f() {\n"
" const int i( foo());\n"
" if(a) {\n"
" for ( ; i < 10; ++i) ;\n"
" }\n"
"}");
ASSERT_EQUALS("", errout.str());
}
void checkOldStylePointerCast(const char code[]) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.addEnabled("style");
// Tokenize..
Tokenizer tokenizerCpp(&settings, this);
std::istringstream istr(code);
tokenizerCpp.tokenize(istr, "test.cpp");
Tokenizer tokenizerC(&settings, this);
std::istringstream istr2(code);
tokenizerC.tokenize(istr2, "test.c");
CheckOther checkOtherCpp(&tokenizerCpp, &settings, this);
checkOtherCpp.warningOldStylePointerCast();
CheckOther checkOtherC(&tokenizerC, &settings, this);
checkOtherC.warningOldStylePointerCast();
}
void oldStylePointerCast() {
checkOldStylePointerCast("class Base;\n"
"void foo()\n"
"{\n"
" Base * b = (Base *) derived;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
checkOldStylePointerCast("class Base;\n"
"void foo()\n"
"{\n"
" Base * b = (const Base *) derived;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
checkOldStylePointerCast("class Base;\n"
"void foo()\n"
"{\n"
" Base * b = (const Base *) ( new Derived() );\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
checkOldStylePointerCast("class Base;\n"
"void foo()\n"
"{\n"
" Base * b = (const Base *) new Derived();\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
checkOldStylePointerCast("class Base;\n"
"void foo()\n"
"{\n"
" Base * b = (const Base *) new short[10];\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) C-style pointer casting\n", errout.str());
checkOldStylePointerCast("class B;\n"
"class A\n"
"{\n"
" virtual void abc(B *) const = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
checkOldStylePointerCast("class B;\n"
"class A\n"
"{\n"
" virtual void abc(const B *) const = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void checkInvalidPointerCast(const char code[], bool portability = false, bool inconclusive = false) {
// Clear the error buffer..
errout.str("");
Settings settings;
settings.addEnabled("style");
if (portability)
settings.addEnabled("portability");
settings.inconclusive = inconclusive;
// Tokenize..
Tokenizer tokenizer(&settings, this);
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
CheckOther checkOtherCpp(&tokenizer, &settings, this);
checkOtherCpp.invalidPointerCast();
}
void invalidPointerCast() {
checkInvalidPointerCast("void test() {\n"
" float *f = new float[10];\n"
" delete [] (double*)f;\n"
" delete [] (long double const*)(new float[10]);\n"
"}");
TODO_ASSERT_EQUALS("[test.cpp:3]: (warning) Casting between float* and double* which have an incompatible binary data representation.\n"
"[test.cpp:4]: (warning) Casting between float* and long double* which have an incompatible binary data representation.\n",
"[test.cpp:3]: (warning) Casting between float* and double* which have an incompatible binary data representation.\n"
"[test.cpp:4]: (warning) Casting between float* and double* which have an incompatible binary data representation.\n", errout.str());
checkInvalidPointerCast("void test(const float* f) {\n"
" double *d = (double*)f;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Casting between float* and double* which have an incompatible binary data representation.\n", errout.str());
checkInvalidPointerCast("void test(double* d1) {\n"
" long double *ld = (long double*)d1;\n"
" double *d2 = (double*)ld;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Casting between double* and long double* which have an incompatible binary data representation.\n"
"[test.cpp:3]: (warning) Casting between long double* and double* which have an incompatible binary data representation.\n", errout.str());
checkInvalidPointerCast("char* test(int* i) {\n"
" long double *d = (long double*)(i);\n"
" double *d = (double*)(i);\n"
" float *f = reinterpret_cast<float*>(i);\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Casting between integer* and long double* which have an incompatible binary data representation.\n"
"[test.cpp:3]: (warning) Casting between integer* and double* which have an incompatible binary data representation.\n"
"[test.cpp:4]: (warning) Casting between integer* and float* which have an incompatible binary data representation.\n", errout.str());
checkInvalidPointerCast("float* test(unsigned int* i) {\n"
" return (float*)i;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Casting between integer* and float* which have an incompatible binary data representation.\n", errout.str());
checkInvalidPointerCast("float* test(unsigned int* i) {\n"
" return (float*)i[0];\n"
"}");
ASSERT_EQUALS("", errout.str());
checkInvalidPointerCast("float* test(double& d) {\n"
" return (float*)&d;\n"
"}");
ASSERT_EQUALS("[test.cpp:2]: (warning) Casting between double* and float* which have an incompatible binary data representation.\n", errout.str());
checkInvalidPointerCast("void test(float* data) {\n"
" f.write((char*)data,sizeof(float));\n"
"}", true, false);
ASSERT_EQUALS("", errout.str());
checkInvalidPointerCast("void test(float* data) {\n"
" f.write((char*)data,sizeof(float));\n"
"}", true, true); // #3639
ASSERT_EQUALS("[test.cpp:2]: (portability, inconclusive) Casting from float* to char* is not portable due to different binary data representations on different platforms.\n", errout.str());
checkInvalidPointerCast("long long* test(float* f) {\n"
" return (long long*)f;\n"
"}", false);