SafeSubtract
The latest version of this topic can be found at SafeSubtract.
Subtracts two numbers in a way that protects against overflow.
Syntax
template<typename T, typename U>
inline bool SafeSubtract (
T t,
U u,
T& result
) throw ();
Parameters
[in] t
The first number in the subtraction. This must be of type T.
[in] u
The number to subtract from t. This must be of type U.
[out] result
The parameter where SafeSubtract stores the result.
Return Value
true if no error occurs; false if an error occurs.
Remarks
This method is part of SafeInt Library and is designed for a single subtraction operation without creating an instance of the SafeInt Class.
Note
This method should only be used when a single mathematical operation must be protected. If there are multiple operations, you should use the SafeInt class instead of calling the individual stand-alone functions.
For more information about the template types T and U, see SafeInt Functions.
Requirements
Header: safeint.h
Namespace: Microsoft::Utilities