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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
 
Tags
    Impact
      Clean code attribute
        1. Pointer and reference parameters should be "const" if the corresponding object is not modified

           Code Smell
        2. Non-standard characters should not occur in header file names in "#include" directives

           Bug
        3. Functions should not be declared at block scope

           Code Smell
        4. Literal suffix "L" for long integers shall be upper case

           Code Smell
        5. Digraphs should not be used

           Code Smell
        6. The first element of an array should not be accessed implicitly

           Code Smell
        7. A single L in a literal suffix should only be used for long values

           Code Smell
        8. Loop variables should be declared in the minimal possible scope

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

           Code Smell
        10. "sizeof" should not be called on pointers

           Bug
        11. Control characters should not be used in literals

           Code Smell
        12. Parameters should be passed in the correct order

           Code Smell
        13. Redundant casts should not be used

           Code Smell
        14. Multiple variables should not be declared on the same line

           Code Smell
        15. Unused local variables should be removed

           Code Smell
        16. Octal values should not be used

           Code Smell
        17. A "while" loop should be used instead of a "for" loop

           Code Smell
        18. Sections of code should not be commented out

           Code Smell
        19. Redundant pairs of parentheses should be removed

           Code Smell

        Parameters should be passed in the correct order

        intentionality - clear
        maintainability
        Code Smell
        Quick FixIDE quick fixes available with SonarLint

          Why is this an issue?

          When the names of parameters in a method call match the names of the method arguments, it contributes to clearer, more readable code. However, when the names match, but are passed in a different order than the method arguments, it indicates a mistake in the parameter order which will likely lead to unexpected results.

          Noncompliant code example

          int divide(int divisor, int dividend) {
            return divisor / dividend;
          }
          
          void doTheThing() {
            int divisor = 15;
            int dividend = 5;
          
            int result = divide(dividend, divisor);  // Noncompliant; operation succeeds, but result is unexpected
            //...
          }
          

          Compliant solution

          int divide(int divisor, int dividend) {
            return divisor / dividend;
          }
          
          void doTheThing() {
            int divisor = 15;
            int dividend = 5;
          
            int result = divide(divisor, dividend);
            //...
          }
          
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            Developer Edition
            Available Since
            9.1

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