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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Multiply two integers, checking for overflow.

Header File

Defined in <SDL3/SDL_stdinc.h>


SDL_FORCE_INLINE int SDL_size_mul_overflow (size_t a, size_t b, size_t *ret);

Function Parameters

size_t a the multiplicand.
size_t b the multiplier.
size_t * ret on non-overflow output, stores the multiplication result. May not be NULL.

Return Value

(int) Returns -1 on overflow, 0 if result doesn't overflow.


If a * b would overflow, return -1.

Otherwise store a * b via ret and return 0.

Thread Safety

It is safe to call this function from any thread.


This function is available since SDL 3.0.0.

CategoryAPI, CategoryAPIFunction, CategoryStdinc

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