LANG.CAST.PC.AO : Cast: Non-integer Arithmetic Type/Object Pointer

JavaScript is not currently enabled, but is required for full CodeSonar manual search and browse functionality.

If you are viewing this file in your hub's Web GUI, enable JavaScript in your browser: you will also need it for GUI functionality.

If you opened this file directly from disk, your browser may be directly suppressing JavaScript functionality: certain browsers perform this suppression on local files (but not files delivered by web servers) for security reasons.

If you access the manual through the hub's Web GUI, the functionality will not be suppressed because the hub is a web server.
Alternatively, your browser may allow you to explicitly disable the security setting that suppresses functionality. See the CodeSonar FAQ for more information.

CodeSonar^® 9.2p0

CONFIDENTIAL

CodeSecure Inc

C and C++

LANG.CAST.PC.AO : Cast: Non-integer Arithmetic Type/Object Pointer

Summary

A cast between a pointer to object and one of the following types (as defined by the MISRA C 2012 standard): 'essentially Boolean', 'essentially character', 'essentially enum', 'essentially floating'.

Properties

Class Name

Cast: Non-integer Arithmetic Type/Object Pointer

Significance

reliability

Mnemonic

LANG.CAST.PC.AO

Categories

MisraC2025	MisraC2025:11.4	A conversion shall not be performed between a pointer to object and an arithmetic type
MisraC2023	MisraC2023:11.7	A cast shall not be performed between pointer to object and a non-integer arithmetic type
Misra2012	Misra2012:11.7	A cast shall not be performed between pointer to object and a non-integer arithmetic type
Misra2004	Misra2004:11.2	Conversions shall not be performed between a pointer to object and any type other than an integral type, another pointer to object type or a pointer to void
CWE	CWE:704	Incorrect Type Conversion or Cast
TS17961	TS17961:5.1-ptrcomp	Accessing an object through a pointer to an incompatible type
JSF++	JSF++:182	Type casting from any type to or from pointers shall not be used.
	JSF++:183	Every possible measure should be taken to avoid type casting.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.

RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Cast: Non-integer Arithmetic Type/Object Pointer"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example

void use_pointers(int* x, int *y);
void use_chars(char a, char b);

void PC_AtoO(char c){
    int *pi = (int *)c; /* 'Cast: Non-integer Arithmetic Type/Object Pointer' warning issued here */
    int *cpi = c;                   /* not a cast ('Bad Initializer Type' warning issued) */
    use_pointers(pi, cpi);
}

void PC_OtoA(int *pi){
    char c = (char) pi; /* 'Cast: Non-integer Arithmetic Type/Object Pointer' warning issued here
                         *  ('Pointer Conversion Loses Bits' warning also issued)
                         */
    char cc = pi;                   /* not a cast ('Bad Initializer Type' warning issued) */
    use_chars(c, cc);
}

Relevant Configuration File Parameters

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

To report problems with this documentation, please visit https://support.codesecure.com/.