LANG.TYPE.OC : Octal Constant

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CodeSonar^® 9.2p0

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C and C++

LANG.TYPE.OC : Octal Constant

Summary

An integer constant (other than 0) is specified in octal format.

Properties

Class Name

Octal Constant

Significance

style

Mnemonic

LANG.TYPE.OC

Categories

MisraC2025	MisraC2025:7.1	Octal constants shall not be used
MisraC2023	MisraC2023:7.1	Octal constants shall not be used
Misra2012	Misra2012:7.1	Octal constants shall not be used
Misra2004	Misra2004:7.1	Octal constants (other than zero) and octal escape sequences shall not be used
AUTOSARC++14	AUTOSARC++14:M2-13-2	Octal constants (other than zero) and octal escape sequences (other than "\0" ) shall not be used.
MisraC++2008	MisraC++2008:2-13-2	Octal constants (other than zero) and octal escape sequences (other than "\0") shall not be used.
MisraC++2023	MisraC++2023:5.13.3	Octal constants shall not be used
CWE	CWE:1078	Inappropriate Source Code Style or Formatting
	CWE:1389	Incorrect Parsing of Numbers with Different Radices
CERT-C	CERT-C:DCL18-C	Do not begin integer constants with 0 when specifying a decimal value
JSF++	JSF++:149	Octal constants (other than zero) shall not be used.

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="Octal Constant"

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

int decint = 10;                              /* decimal format */

int octint = 012; /* 'Octal Constant' warning issued here */

int hexint = 0xa;                             /* hexadecimal format */

int octint0 = 0;                              /* 0 is a special case */

Relevant Configuration File Parameters

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

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