QA·C Help - 2905

	2905	Constant: Positive integer value truncated by cast to a smaller unsigned type.

Conversion to unsigned

The value of a non-negative integer constant expression is being cast to an unsigned type. The value of the expression is larger than the maximum value which can be represented in this type and so truncation will occur using modulo arithmetic.

For example:


/*PRQA S 1255,2017,3120,3211,3306,3408,3606 ++*/


unsigned char  uca = (unsigned char)255;                 /*      */
unsigned char  ucb = (unsigned char)256;                 /* 2905 */
unsigned short usa = (unsigned short)65535;              /*      */
unsigned short usb = (unsigned short)65536;              /* 2905 */

No MISRA C:2012 Rules applicable to message 2905

See also:

2900 Constant: Positive integer value truncated by implicit conversion to a smaller unsigned type.
2901 Definite: Positive integer value truncated by implicit conversion to a smaller unsigned type.
2902 Apparent: Positive integer value truncated by implicit conversion to a smaller unsigned type.
2903 Suspicious: Positive integer value truncated by implicit conversion to a smaller unsigned type.
2906 Definite: Positive integer value truncated by cast to a smaller unsigned type.
2907 Apparent: Positive integer value truncated by cast to a smaller unsigned type.
2908 Suspicious: Positive integer value truncated by cast to a smaller unsigned type.

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MISRA C:2012 Compliance Module 1.0
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