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SDL Wiki

SDL_RWtell

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

Syntax

Sint64 SDL_RWtell(SDL_RWops *context);

Function Parameters

context

a SDL_RWops data stream object from which to get the current offset

Return Value

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

Remarks

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

Code Examples

extern SDL_RWops *rw;
printf("Current position in stream: %lld\n", (long long) SDL_RWtell(rw));
if (SDL_RWseek(rw, 0, RW_SEEK_END) != -1) {
    printf("Final position in stream: %lld\n", (long long) SDL_RWtell(rw));
}
SDL_RWclose
SDL_RWFromConstMem
SDL_RWFromFile
SDL_RWFromFP
SDL_RWFromMem
SDL_RWread
SDL_RWseek
SDL_RWwrite

CategoryAPI, CategoryIO


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