BADFUNC.ATOF : Use of atof

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A use of atof(), which has undefined behavior on failure.

Class Name

Use of atof

Significance

style

Mnemonic

BADFUNC.ATOF

Categories

MisraC2023	MisraC2023:21.7	The atof, atoi, atol and atoll functions of <stdlib.h> shall not be used
Misra2012	Misra2012:21.7	The atof, atoi, atol and atoll functions of <stdlib.h> shall not be used
Misra2004	Misra2004:20.10	The library functions atof, atoi and atol from library <stdlib.h> shall not be used
AUTOSARC++14	AUTOSARC++14:A18-0-2	The error state of a conversion from string to a numeric value shall be checked.
MisraC++2008	MisraC++2008:18-0-2	The library functions atof, atoi and atol from library <cstdlib> shall not be used.
MisraC++2023	MisraC++2023:21.2.1	The library functions atof, atoi, atol and atoll from <cstdlib> shall not be used
CWE	CWE:676	Use of Potentially Dangerous Function
	CWE:758	Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
CERT-C	CERT-C:ERR34-C	Detect errors when converting a string to a number
CERT-CPP	CERT-CPP:ERR62-CPP	Detect errors when converting a string to a number
JSF++	JSF++:23	The library functions atof, atoi and atol from library <stdlib.h> shall not be used.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += allow class="Use of atof"

double use_atof(const char *s){ 
    return atof(s); /* 'Use of atof' warning issued here */  
}

To include an additional function or set of functions in the checks for this class, create a new set of BAD_FUNCTION_* rules in which the BAD_FUNCTION_REGEX setting matches the function or set of functions you want to check and the remaining rules match those in the other sets for this class.

To remove a function or set of functions from the checks for this class, edit the configuration file to comment out the corresponding set of BAD_FUNCTION_* rules.

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

BADFUNC.ATOF : Use of atof

Properties

Example

Relevant Configuration File Parameters