LANG.STRUCT.LOOP.FPC : Float-typed Loop Counter

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CodeSonar^® 9.2p0

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C and C++

LANG.STRUCT.LOOP.FPC : Float-typed Loop Counter

Summary

A FOR loop counter is a float, double, or long double.

Properties

Class Name

Float-typed Loop Counter

Significance

style

Mnemonic

LANG.STRUCT.LOOP.FPC

Categories

MisraC2025	MisraC2025:14.1	A loop counter shall not have essentially floating type
MisraC2023	MisraC2023:14.1	A loop counter shall not have essentially floating type
Misra2012	Misra2012:14.1	A loop counter shall not have essentially floating type
Misra2004	Misra2004:13.4	The controlling expression of a for statement shall not contain any objects of floating type
AUTOSARC++14	AUTOSARC++14:A6-5-2	A for loop shall contain a single loop-counter which shall not have floating-point type.
MisraC++2008	MisraC++2008:6-5-1	A for loop shall contain a single loop-counter which shall not have floating type.
MisraC++2023	MisraC++2023:9.5.1	Legacy for statements should be simple
TS17961	TS17961:5.23-usrfmt	Including tainted or out-of-domain input in a format string
CERT-C	CERT-C:FLP30-C	Do not use floating-point variables as loop counters
JSF++	JSF++:197	Floating point variables shall not be used as loop counters.

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="Float-typed Loop Counter"

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 lang_struct_loop_fpc(void){
    float fc;
    int i;

    for ( fc = 0.0f; fc < 1.0f; fc += 0.01f){ /* 'Float-typed Loop Counter' warning issued here */
        /* ... */
    }

    for ( i = 0; i < 100; i++){                                      /* integer loop counter */
        /* ... */
    }
}

Relevant Configuration File Parameters

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

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