ckd_mul
| Defined in header <stdckdint.h>
|
||
| #define ckd_mul( result, a, b ) /* implementation-defined */ // exposed interface: |
(since C23) | |
Computes the multiplication x × y and stores the result into *result. The multiplication is performed as if both operands were represented in a signed integer type with infinite range, and the result was then converted from this integer type to type1. If the value assigned to *result correctly represents the mathematical result of the operation, it returns false. Otherwise, it returns true. In this case, the value assigned to *result is the mathematical result of the operation wrapped around to the width of *result.
Contents |
[edit] Parameters
| a, b | - | integer values |
| result | - | address of where result should be stored |
[edit] Return value
false if the value assigned to *result correctly represents the mathematical result of the multiplication, true otherwise.
[edit] Note
Both type2 and type3 shall be any integer type other than "plain" char, bool, a bit-precise integer type, or an enumerated type, and they can be the same. *result shall be a modifiable lvalue of any integer type other than "plain" char, bool, a bit-precise integer type, or an enumerated type.
It is recommended to produce a diagnostic message if type2 or type3 are not suitable integer types, or if *result is not a modifiable lvalue of a suitable integer type.
[edit] Example
| This section is incomplete Reason: no example |
[edit] References
- C23 standard (ISO/IEC 9899:2024):
- 7.20.1 The ckd_ checked integer operation macros (p: 311)
[edit] See also
| (C23) |
checked addition operation on two integers (type-generic function macro) |
| (C23) |
checked subtraction operation on two integers (type-generic function macro) |
