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Fixed #5031: simplify labs|fabs|abs(-1) to 1.

This commit is contained in:
Martin Ettl 2013-09-21 16:59:06 +02:00
parent 3de9431507
commit d5f514c820
2 changed files with 67 additions and 1 deletions
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26
lib/tokenize.cpp
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@ -8247,7 +8247,11 @@ void Tokenizer::cppcheckError(const Token *tok) const
"Analysis failed. If the code is valid then please report this failure.");
}
// ------------------------------------------------------
// Simplify math functions.
// It simplifies following functions: atol(),abs(),fabs()
// labs(),llabs() in the tokenlist.
// ------------------------------------------------------
void Tokenizer::simplifyMathFunctions()
{
for (Token *tok = list.front(); tok; tok = tok->next()) {
@ -8272,6 +8276,26 @@ void Tokenizer::simplifyMathFunctions()
// Convert string into a number
tok->str(MathLib::longToString(MathLib::toLongNumber(tok->strValue())));
// Delete remaining )
tok->deleteNext();
} else if (Token::Match(tok, "abs|fabs|labs|llabs ( %num% )")) {
if (tok->previous() &&
Token::simpleMatch(tok->tokAt(-2), "std ::")) {
// Delete "std ::"
tok = tok->tokAt(-2);
tok->deleteNext();
tok->deleteThis();
}
// Delete abs (
tok->deleteNext();
tok->deleteThis();
std::string strNumber(tok->str());
if (!strNumber.empty() && strNumber[0] == '-')
strNumber = strNumber.substr(1);
// insert result into token list
tok->str(strNumber);
// Delete remaining )
tok->deleteNext();
}

42
test/testtokenize.cpp
View File

@ -496,6 +496,8 @@ private:
TEST_CASE(platformWin32AStringCat); // ticket #5015
TEST_CASE(platformWin32WStringCat); // ticket #5015
TEST_CASE(simplifyMathFunctions); // ticket #5031
TEST_CASE(simplifyMathExpressions); //ticket #1620
// AST data
@ -8276,6 +8278,46 @@ private:
ASSERT_EQUALS(expected, tokenizeAndStringify(code, true, true, Settings::Win32W));
}
void simplifyMathFunctions() { //#5031
const char code1[] = "void foo() {\n"
" std::cout<<std::abs(0);\n" // in std:: namespeace
" std::cout<<std::fabs(0.0);\n" // in std:: namespeace
" std::cout<<abs(0);\n"
" std::cout<<fabs(0.0);\n"
" std::cout<<labs(0);\n"
" std::cout<<llabs(0);\n"
" std::cout<<std::abs(-1);\n" // in std:: namespeace
" std::cout<<std::fabs(-1.0);\n" // in std:: namespeace
" std::cout<<abs(-1);\n"
" std::cout<<fabs(-1.0);\n"
" std::cout<<labs(-1);\n"
" std::cout<<llabs(-1);\n"
" std::cout<<atol(\"1\");\n"
"}";
const char expected1[] = "void foo ( ) {\n"
"std :: cout << 0 ;\n"
"std :: cout << 0.0 ;\n"
"std :: cout << 0 ;\n"
"std :: cout << 0.0 ;\n"
"std :: cout << 0 ;\n"
"std :: cout << 0 ;\n"
"std :: cout << 1 ;\n"
"std :: cout << 1.0 ;\n"
"std :: cout << 1 ;\n"
"std :: cout << 1.0 ;\n"
"std :: cout << 1 ;\n"
"std :: cout << 1 ;\n"
"std :: cout << 1 ;\n"
"}";
ASSERT_EQUALS(expected1, tokenizeAndStringify(code1));
// testcase from ticket #5031
const char code2[] = "extern int a; void f(){printf(\"%i\", abs(--a));}\n";
const char expected2[] = "extern int a ; void f ( ) { printf ( \"%i\" , abs ( -- a ) ) ; }";
ASSERT_EQUALS(expected2, tokenizeAndStringify(code2));
}
void simplifyMathExpressions() {//#1620
const char code1[] = "void foo() {\n"
" std::cout<<sin(0);\n"