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.

CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++

LANG.STRUCT.NBC : Condition Is Not Boolean

Summary

The controlling expression of an if, for, while, do-while, or ternary ?: statement is not a Boolean expression.

Properties

Class Name Condition Is Not Boolean
Significance style
Mnemonic LANG.STRUCT.NBC
Categories
MisraC2025 MisraC2025:14.4 The controlling expression of an if statement and the controlling expression of an iteration-statement shall have essentially Boolean type
MisraC2023 MisraC2023:14.4 The controlling expression of an if statement and the controlling expression of an iteration-statement shall have essentially Boolean type
Misra2012 Misra2012:14.4 The controlling expression of an if statement and the controlling expression of an iteration-statement shall have essentially Boolean type
Misra2004 Misra2004:13.2 Tests of a value against zero should be made explicit, unless the operand is effectively Boolean
AUTOSARC++14 AUTOSARC++14:A5-0-2 The condition of an if-statement and the condition of an iteration statement shall have type bool.
  AUTOSARC++14:A13-2-3 A relational operator shall return a boolean value.
MisraC++2008 MisraC++2008:5-0-13 The condition of an if-statement and the condition of an iteration-statement shall have type bool.
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="Condition Is Not Boolean"
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 

#include <stddef.h>

int lang_struct_nbc(int a, char *p){
    int i=0;
    int j;

    if (p != NULL) { i++;}                               /* 'p != NULL' is Boolean */
 
    if (!!p) {i++;}                                      /* '!!p' is Boolean */

    if (p) {i++;}                   /* 'Condition Is Not Boolean' warning issued here */

    while (i > 2){ i--;}                                 /* 'i > 5' is Boolean */

    while (i){ i--; }               /* 'Condition Is Not Boolean' warning issued here */

    i += a ? 3 : 1;                 /* 'Condition Is Not Boolean' warning issued here */

    for (j = 10; j > 0; j--) { i++;}                     /* 'j > 0' is Boolean */

    for (j = 10; j; j--) { i++;}    /* 'Condition Is Not Boolean' warning issued here */

    return i;
}

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/.