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sprintf counter improvements

This commit is contained in:
Reijo Tomperi 2009-10-08 16:27:46 +03:00
parent ad5d87ee14
commit 5eee9af974
2 changed files with 45 additions and 35 deletions
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42
src/checkbufferoverrun.cpp
View File

@ -771,7 +771,7 @@ void CheckBufferOverrun::bufferOverrun()
//---------------------------------------------------------------------------
int CheckBufferOverrun::countSprintfLength(const std::string &input_string, const std::list<const Token*> &/*parameters*/)
int CheckBufferOverrun::countSprintfLength(const std::string &input_string, const std::list<const Token*> &parameters)
{
@ -783,7 +783,8 @@ int CheckBufferOverrun::countSprintfLength(const std::string &input_string, cons
std::string digits_string = "";
int digits = 0;
int check_for_i_d_x_f = 0;
std::list<const Token*>::const_iterator paramIter = parameters.begin();
int parameterLength = 0;
for (std::string::size_type i = 0; i != input_string.length(); i++)
{
@ -807,12 +808,27 @@ int CheckBufferOverrun::countSprintfLength(const std::string &input_string, cons
case 'E':
case 'g':
case 'o':
case 's':
case 'u':
case 'p':
case 'n':
if (flag == 0) on_on_next = 1;
if (flag == 0)
{
on_on_next = 1;
if (paramIter != parameters.end()) ++paramIter;
}
break;
case 's':
if (flag == 0)
{
if (paramIter != parameters.end() && *paramIter && (*paramIter)->str()[0] == '"')
parameterLength = Token::getStrLength(*paramIter);
on_on_next = 1;
if (paramIter != parameters.end()) ++paramIter;
}
break;
case '%':
if (flag == 1) flag = 0;
else
@ -830,12 +846,21 @@ int CheckBufferOverrun::countSprintfLength(const std::string &input_string, cons
if (on_on_next == 1 && flag == 0)
{
//std::cout << digits_string;
digits_string = digits_string.substr(1, digits_string.size());
if (check_for_i_d_x_f == 1) digits += std::max(abs(atoi(digits_string.c_str())), 1);
int tempDigits = 0;
if (check_for_i_d_x_f == 1)
tempDigits = std::max(abs(atoi(digits_string.c_str())), 1);
else
digits += abs(atoi(digits_string.c_str()));
tempDigits = abs(atoi(digits_string.c_str()));
if (tempDigits < parameterLength)
digits += parameterLength;
else if (parameterLength <= tempDigits)
digits += tempDigits;
else
digits += parameterLength - tempDigits;
parameterLength = 0;
digits_string = "";
check_for_i_d_x_f = 0;
@ -863,7 +888,6 @@ int CheckBufferOverrun::countSprintfLength(const std::string &input_string, cons
continue;
}
j++;
}

38
test/testbufferoverrun.cpp
View File

@ -1031,43 +1031,29 @@ private:
ASSERT_EQUALS(10, CheckBufferOverrun::countSprintfLength("\\\\\\\\Hello%d \0Text\\\\\\\\", unknownParameter));
ASSERT_EQUALS(4, CheckBufferOverrun::countSprintfLength("%%%%%d", unknownParameter));
Token strTok;
strTok.str("\"12345\"");
std::list<const Token*> stringAsParameter;
{
Token tok;
tok.str("\"12345\"");
stringAsParameter.push_back(&tok);
}
TODO_ASSERT_EQUALS(9, CheckBufferOverrun::countSprintfLength("str%s", stringAsParameter));
TODO_ASSERT_EQUALS(6, CheckBufferOverrun::countSprintfLength("%-4s", stringAsParameter));
stringAsParameter.push_back(&strTok);
ASSERT_EQUALS(9, CheckBufferOverrun::countSprintfLength("str%s", stringAsParameter));
ASSERT_EQUALS(6, CheckBufferOverrun::countSprintfLength("%-4s", stringAsParameter));
ASSERT_EQUALS(6, CheckBufferOverrun::countSprintfLength("%-5s", stringAsParameter));
ASSERT_EQUALS(7, CheckBufferOverrun::countSprintfLength("%-6s", stringAsParameter));
std::list<const Token*> intAsParameter;
{
Token tok;
tok.str("12345");
stringAsParameter.push_back(&tok);
}
Token numTok;
numTok.str("12345");
stringAsParameter.push_back(&numTok);
TODO_ASSERT_EQUALS(6, CheckBufferOverrun::countSprintfLength("%02ld", intAsParameter));
ASSERT_EQUALS(9, CheckBufferOverrun::countSprintfLength("%08ld", intAsParameter));
std::list<const Token*> multipleParams;
{
Token tok;
tok.str("\"12345\"");
multipleParams.push_back(&tok);
multipleParams.push_back(0);
tok.str("12345");
multipleParams.push_back(&tok);
}
multipleParams.push_back(&strTok);
multipleParams.push_back(0);
multipleParams.push_back(&numTok);
TODO_ASSERT_EQUALS(15, CheckBufferOverrun::countSprintfLength("str%s%d%d", multipleParams));
ASSERT_EQUALS(26, CheckBufferOverrun::countSprintfLength("str%-6s%08ld%08ld", multipleParams));
}
void strncpy1()