cppcheck/test/testcharvar.cpp

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/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2010 Daniel Marjamäki and Cppcheck team.
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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/>.
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*/
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#include "tokenize.h"
#include "checkother.h"
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#include "testsuite.h"
#include <sstream>
extern std::ostringstream errout;
class TestCharVar : public TestFixture
{
public:
TestCharVar() : TestFixture("TestCharVar")
{ }
private:
void run()
{
TEST_CASE(array_index);
TEST_CASE(bitop1);
TEST_CASE(bitop2);
TEST_CASE(return1);
TEST_CASE(assignChar);
TEST_CASE(and03);
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}
void check(const char code[])
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{
// Tokenize..
Tokenizer tokenizer;
std::istringstream istr(code);
tokenizer.tokenize(istr, "test.cpp");
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tokenizer.setVarId();
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// Clear the error buffer..
errout.str("");
// Check char variable usage..
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Settings settings;
CheckOther checkOther(&tokenizer, &settings, this);
checkOther.checkCharVariable();
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}
void array_index()
{
check("void foo()\n"
"{\n"
" unsigned char ch = 0x80;\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
check("void foo()\n"
"{\n"
" char ch = 0x80;\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Warning - using char variable as array index\n", errout.str());
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check("void foo()\n"
"{\n"
" signed char ch = 0x80;\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Warning - using char variable as array index\n", errout.str());
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check("void foo(char ch)\n"
"{\n"
" buf[ch] = 0;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:3]: (style) Warning - using char variable as array index\n", errout.str());
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}
void bitop1()
{
check("void foo()\n"
"{\n"
" int result = 0;\n"
" char ch;\n"
" result = a | ch;\n"
"}\n");
ASSERT_EQUALS("[test.cpp:4]: (style) Warning - using char variable in bit operation\n", errout.str());
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}
void bitop2()
{
check("void foo()\n"
"{\n"
" char ch;\n"
" func(&ch);\n"
"}\n");
ASSERT_EQUALS("", errout.str());
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}
void return1()
{
check("void foo()\n"
"{\n"
" char c;\n"
" return &c;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void assignChar()
{
check("void foo()\n"
"{\n"
" char c;\n"
" c = c & 0x123;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
void and03()
{
check("void foo()\n"
"{\n"
" char c;\n"
" int i = c & 0x03;\n"
"}\n");
ASSERT_EQUALS("", errout.str());
}
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};
REGISTER_TEST(TestCharVar)
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