BADFUNC.CWCTYPE : Use of <cwctype> Function

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CodeSonar^® 9.2p0

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C and C++

BADFUNC.CWCTYPE : Use of <cwctype> Function

Summary

A use of one of the character-handling functions defined in <cwctype>: iswalnum(), iswalpha(), iswblank(), iswcntrl(), iswctype(), iswdigit(), iswgraph(), iswlower(), iswprint(), iswpunct(), iswspace(), iswupper(), iswxdigit(), towctrans(), towlower(), towupper().

Using these functions can lead to undefined behavior.

Properties

Class Name

Use of <cwctype> Function

Significance

style

Mnemonic

BADFUNC.CWCTYPE

Example

#include <cwctype>
#include <locale>

void use_of_cwctype( wchar_t c ) {
    while( std::iswdigit( c ) )                 // 'Use of <cwctype> Function' warning issued here
        break;
    while( std::isdigit( c, std::locale {} ) )                   // ok: defined in <locale> (not <cwctype>)
        break;
}

Relevant Configuration File Parameters

This class is implemented using a BAD_FUNCTION_* rule set in the general template configuration file.

To include an additional function or set of functions in the checks for this class, create a new set of BAD_FUNCTION_* rules in which the BAD_FUNCTION_REGEX setting matches the function or set of functions you want to check and the remaining rules match those in the other sets for this class.
To remove a function or set of functions from the checks for this class, edit the configuration file to comment out the corresponding set of BAD_FUNCTION_* rules.

The following configuration file parameters affect checks for this warning class.

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