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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!)


Determine the current read/write offset in an SDL_IOStream data stream.

Header File

Defined in <SDL3/SDL_iostream.h>


Sint64 SDL_TellIO(SDL_IOStream *context);

Function Parameters

SDL_IOStream * context an SDL_IOStream data stream object from which to get the current offset.

Return Value

(Sint64) Returns the current offset in the stream, or -1 if the information can not be determined.


SDL_TellIO is actually a wrapper function that calls the SDL_IOStream's seek method, with an offset of 0 bytes from SDL_IO_SEEK_CUR, to simplify application development.


This function is available since SDL 3.0.0.

See Also

CategoryAPI, CategoryAPIFunction, CategoryIOStream

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