LANG.CAST.PC.INT : Conversion: Pointer/Integer

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A cast or coercion from a pointer to an integer, or from an integer to a pointer.

Exception: casting or coercing constant integer 0 to a pointer will not trigger a warning of this class.

Class Name

Conversion: Pointer/Integer

Significance

style

Mnemonic

LANG.CAST.PC.INT

Categories

MisraC2023	MisraC2023:11.4	A conversion should not be performed between a pointer to object and an integer type
Misra2012	Misra2012:11.4	A conversion should not be performed between a pointer to object and an integer type
Misra2004	Misra2004:11.3	A cast should not be performed between a pointer type and an integral type
AUTOSARC++14	AUTOSARC++14:M5-2-8	An object with integer type or pointer to void type shall not be converted to an object with pointer type.
	AUTOSARC++14:M5-2-9	A cast shall not convert a pointer type to an integral type.
MisraC++2008	MisraC++2008:5-2-7	An object with pointer type shall not be converted to an unrelated pointer type, either directly or indirectly.
	MisraC++2008:5-2-8	An object with integer type or pointer to void type shall not be converted to an object with pointer type.
	MisraC++2008:5-2-9	A cast should not convert a pointer type to an integral type.
MisraC++2023	MisraC++2023:8.2.6	An object with integral, enumerated, or pointer to void type shall not be converted to an object with pointer type
	MisraC++2023:8.2.7	A cast should not convert a pointer type to an integral type
CWE	CWE:704	Incorrect Type Conversion or Cast
TS17961	TS17961:5.6-argcomp	5.6. Calling functions with incorrect arguments
	TS17961:5.10-intptrconv	5.10. Converting a pointer to integer or integer to pointer
CERT-C	CERT-C:INT31-C	Ensure that integer conversions do not result in lost or misinterpreted data
	CERT-C:INT36-C	Converting a pointer to integer or integer to pointer
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="Conversion: Pointer/Integer"

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

char* PC_ItoP(int i){
    char *p = (char *) i;        /* 'Conversion: Pointer/Integer' warning issued here */
    char *pnull = (char *) 0;                   /* specific exception */
    char *pnullc = 0;                           /* specific exception */
    return p;
}

int PC_PtoI(char *c){
    int i = (int) c;             /* 'Conversion: Pointer/Integer' warning issued here */
    return i;
}

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

LANG.CAST.PC.INT : Conversion: Pointer/Integer

Summary

Properties

Example

Relevant Configuration File Parameters