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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!)


Use this function to get the size of the data stream in an SDL_IOStream.

Header File

Defined in <SDL3/SDL_iostream.h>


Sint64 SDL_GetIOSize(SDL_IOStream *context);

Function Parameters

SDL_IOStream * context the SDL_IOStream to get the size of the data stream from.

Return Value

(Sint64) Returns the size of the data stream in the SDL_IOStream on success or a negative error code on failure; call SDL_GetError() for more information.


This function is available since SDL 3.0.0.

CategoryAPI, CategoryAPIFunction, CategoryIOStream

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