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C

C static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C code

  • All rules 315
  • Vulnerability13
  • Bug76
  • Security Hotspot19
  • Code Smell207

  • Quick Fix 19
Filtered: 17 rules found
bad-practice
    Impact
      Clean code attribute
        1. Pointer and reference parameters should be "const" if the corresponding object is not modified

           Code Smell
        2. Reserved identifiers should not be defined or declared

           Code Smell
        3. Only standard forms of the "defined" directive should be used

           Code Smell
        4. Function-like macros should not be used

           Code Smell
        5. Recursion should not be used

           Code Smell
        6. "continue" should not be used

           Code Smell
        7. Bitwise operators should not be applied to signed operands

           Bug
        8. Functions should be declared explicitly

           Code Smell
        9. Names of well-known C standard library macros and functions should not be used as identifiers

           Code Smell
        10. Macros should not be used as replacements for "typedef" and "using"

           Code Smell
        11. Size of bit fields should not exceed the size of their types

           Code Smell
        12. Pointer and reference local variables should be "const" if the corresponding object is not modified

           Code Smell
        13. Argument of "printf" should be a format string

           Code Smell
        14. Loops with at most one iteration should be refactored

           Bug
        15. "if" statements should be preferred over "switch" when simpler

           Code Smell
        16. Track uses of "NOSONAR" comments

           Code Smell
        17. Deprecated attributes should include explanations

           Code Smell

        Size of bit fields should not exceed the size of their types

        intentionality - logical
        maintainability
        Code Smell
        • bad-practice

        Why is this an issue?

        Bit fields allow the developers to declare a class member with a specific size.

        However, the size of a bit field is also constrained by its type: even if the specified size is greater than the size of the type, the value of the bit field will not exceed the maximum value of this type. The extra bits will just create unused padding.

        The incompatibility of the size of the type with the specified size can have two causes: either the specified size is a typo error (that is the most probable cause) or the developer did not realize the size of the type he chose was too small.

        Noncompliant code example

        class A {
          unsigned int b : 55; // Noncompliant, specified size is greater than the size of unsigned int
        };
        

        Compliant solution

        class A {
          unsigned int b : 32;
        };
        

        Or

        class A {
          unsigned long long int b : 55;
        };
        
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          Developer Edition
          Available Since
          9.1

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