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LANG.CAST.PC.AV
LANG.CAST.PC.CONST2PTR
LANG.CAST.PC.INT

LANG.CAST.COERCE
LANG.CAST.VALUE

ALLOC.SIZE.TRUNC
MISC.MEM.SIZE.TRUNC

LANG.MEM.TBA

Cast: arithmetic type/void pointer
Conversion: integer constant to pointer
Conversion: pointer/integer

Coercion alters value
Cast alters value

Truncation of allocation size
Truncation of size

Tainted buffer access

Can detect violations of this rule. However, false warnings may be raised if limits.h is included

Coverity*

NEGATIVE_RETURNS

REVERSE_NEGATIVE

MISRA_CAST

Can find array accesses, loop bounds, and other expressions that may contain dangerous implied integer conversions that would result in unexpected behavior

Can find instances where a negativity check occurs after the negative value has been used for something else

Can find instances where an integer expression is implicitly converted to a narrower integer type, where the signedness of an integer value is implicitly converted, or where the type of a complex expression is implicitly converted

PRECISION.LOSS
PRECISION.LOSS.CALL

93 S, 433 S, 434 S

CERT_C-INT31-a
CERT_C-INT31-b
CERT_C-INT31-c
CERT_C-INT31-d
CERT_C-INT31-e
CERT_C-INT31-f
CERT_C-INT31-g
CERT_C-INT31-h
CERT_C-INT31-i
CERT_C-INT31-j
CERT_C-INT31-k
CERT_C-INT31-l
CERT_C-INT31-m
CERT_C-INT31-n
CERT_C-INT31-o

An expression of essentially Boolean type should always be used where an operand is interpreted as a Boolean value
An operand of essentially Boolean type should not be used where an operand is interpreted as a numeric value
An operand of essentially character type should not be used where an operand is interpreted as a numeric value
An operand of essentially enum type should not be used in an arithmetic operation
Shift and bitwise operations should not be performed on operands of essentially signed or enum type
An operand of essentially signed or enum type should not be used as the right hand operand to the bitwise shifting operator
An operand of essentially unsigned type should not be used as the operand to the unary minus operator
The value of an expression shall not be assigned to an object with a narrower essential type
The value of an expression shall not be assigned to an object of a different essential type category
Both operands of an operator in which the usual arithmetic conversions are performed shall have the same essential type category
The second and third operands of the ternary operator shall have the same essential type category
The value of a composite expression shall not be assigned to an object with wider essential type
If a composite expression is used as one operand of an operator in which the usual arithmetic conversions are performed then the other operand shall not have wider essential type
If a composite expression is used as one (second or third) operand of a conditional operator then the other operand shall not have wider essential type
Avoid integer overflows

CERT C: Rule INT31-C

Checks for:

• Integer conversion overflow
• Call to memset with unintended value
• Sign change integer conversion overflow
• Tainted sign change conversion
• Unsigned integer conversion overflow

Rule partially covered.

2850, 2851, 2852, 2853, 2855, 2856, 2857, 2858,

2890, 2891, 2892, 2893, 2895, 2896, 2897, 2898

2900, 2901, 2902, 2903, 2905, 2906, 2907, 2908

2850, 2851, 2852, 2853, 2855, 2856, 2857, 2858,

2890, 2891, 2892, 2893, 2895, 2896, 2897, 2898,

2900, 2901, 2902, 2903, 2905, 2906, 2907, 2908,

3000, 3010