DCL05-A. Use typedefs to improve code readability

Use type definitions (typedef) to improve code readability.

Non-Compliant Code Example

The following declaration of the signal() function does not make use of typedef names and is consequently hard to read.

void (*signal(int, void (*)(int)))(int);

Compliant Solution

This compliant solution makes use of typedef names to specify exactly the same type as in the non-compliant coding example.

typedef void fv(int),
typedef void (*pfv)(int);
fv *signal(int, fv *);
pfv signal(int, pfv);

Risk Assessment

Code readability is important for discovering and eliminating vulnerabilities.

Search for vulnerabilities resulting from the violation of this rule on the CERT website.

References

[[ISO/IEC 9899-1999]] Section 6.7.7, "Type definitions"

DCL04 NCCE 2      DCL04-A. Take care when declaring more than one variable per declaration       DCL06-A. Use meaningful symbolic constants to represent literal values in program logic