144 lines
4.5 KiB
C++
144 lines
4.5 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2019 Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "exprengine.h"
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#include "settings.h"
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#include "symboldatabase.h"
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#include "tokenize.h"
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#include "testsuite.h"
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class TestExprEngine : public TestFixture {
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public:
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TestExprEngine() : TestFixture("TestExprEngine") {
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}
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private:
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void run() OVERRIDE {
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TEST_CASE(argPointer);
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TEST_CASE(argStruct);
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TEST_CASE(expr1);
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TEST_CASE(expr2);
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TEST_CASE(expr3);
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TEST_CASE(expr4);
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TEST_CASE(expr5);
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TEST_CASE(functionCall1);
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TEST_CASE(if1);
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TEST_CASE(if2);
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TEST_CASE(if3);
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TEST_CASE(ifelse1);
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TEST_CASE(localArray1);
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TEST_CASE(localArrayUninit);
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TEST_CASE(pointerAlias1);
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TEST_CASE(pointerAlias2);
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}
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std::string getRange(const char code[], const std::string &str) {
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Settings settings;
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settings.platform(cppcheck::Platform::Unix64);
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Tokenizer tokenizer(&settings, this);
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std::istringstream istr(code);
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tokenizer.tokenize(istr, "test.cpp");
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std::string ret;
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std::function<void(const Token *, const ExprEngine::Value &)> f = [&](const Token *tok, const ExprEngine::Value &value) {
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if (tok->expressionString() == str)
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ret += value.getRange();
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};
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std::vector<ExprEngine::Callback> callbacks;
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callbacks.push_back(f);
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ExprEngine::executeAllFunctions(&tokenizer, &settings, callbacks);
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return ret;
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}
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void argPointer() {
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ASSERT_EQUALS("?", getRange("void f(unsigned char *p) { a = *p; }", "*p"));
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}
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void argStruct() {
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ASSERT_EQUALS("[0:510]",
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getRange("struct S {\n"
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" unsigned char a;\n"
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" unsigned char b;\n"
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"};\n"
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"void f(struct S s) { return s.a + s.b; }", "s.a+s.b"));
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}
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void expr1() {
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ASSERT_EQUALS("[-32768:32767]", getRange("void f(short x) { a = x; }", "x"));
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}
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void expr2() {
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ASSERT_EQUALS("[-65536:65534]", getRange("void f(short x) { a = x + x; }", "x+x"));
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}
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void expr3() {
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ASSERT_EQUALS("[-65536:65534]", getRange("int f(short x) { int a = x + x; return a; }", "return a"));
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}
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void expr4() {
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ASSERT_EQUALS("[0:0]", getRange("int f(short x) { int a = x - x; return a; }", "return a"));
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}
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void expr5() {
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ASSERT_EQUALS("[-65536:65534]", getRange("void f(short a, short b, short c, short d) { if (a+b<c+d) {} }", "a+b"));
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}
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void functionCall1() {
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ASSERT_EQUALS("[-2147483648:2147483647]", getRange("int atoi(const char *p); void f() { int x = atoi(a); x = x; }", "x=x"));
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}
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void if1() {
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ASSERT_EQUALS("[7:32768]", getRange("inf f(short x) { if (x > 5) a = x + 1; }", "x+1"));
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}
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void if2() {
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ASSERT_EQUALS("[7:32768][-32767:6]", getRange("inf f(short x) { if (x > 5) {} a = x + 1; }", "x+1"));
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}
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void if3() {
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ASSERT_EQUALS("[1:1][-2147483648:2147483647][-2147483648:2147483647]", getRange("void f() { int x; if (a) { if (b) x=1; } a=x; }", "a=x"));
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}
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void ifelse1() {
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ASSERT_EQUALS("[-32767:6]", getRange("inf f(short x) { if (x > 5) ; else a = x + 1; }", "x+1"));
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}
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void localArray1() {
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ASSERT_EQUALS("[5:5]", getRange("inf f() { int arr[10]; arr[4] = 5; return arr[4]; }", "arr[4]"));
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}
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void localArrayUninit() {
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ASSERT_EQUALS("?", getRange("inf f() { int arr[10]; return arr[4]; }", "arr[4]"));
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}
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void pointerAlias1() {
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ASSERT_EQUALS("[3:3]", getRange("inf f() { int x; int *p = &x; x = 3; return *p; }", "return*p"));
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}
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void pointerAlias2() {
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ASSERT_EQUALS("[1:1]", getRange("inf f() { int x; int *p = &x; *p = 1; return *p; }", "return*p"));
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}
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};
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REGISTER_TEST(TestExprEngine)
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