SDL_RWtell

Use this function to *perform a do-nothing seek to get the current offset in an SDL_RWops stream*.

Syntax

long SDL_RWtell(struct SDL_RWops* context)

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The old wiki says this has only 1 param - ctx - but both the old wiki and header also list the following (ctx)->seek(ctx, 0, RW_SEEK_CUR) which appears to specify 3 params. Does the SDL_RWtell macro call the seek function of the SDL_RWops struct then uses the given context + an offset of 0 + whence of RW_SEEK_CUR as the settings to find the current location in the data? I don't know how to properly represent that here. See purple below for my attempt.)
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Function Parameters

Return Value

*Returns the ^current offset in the stream.*

Code Examples

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#include <stdio.h>
#include "SDL_rwops.h"

int main()
{
  SDL_RWops *rw=SDL_RWFromFile("test.bin","r");
  if(rw==NULL)
  {
    fprintf(stderr,"Couldn't open test.bin\n");
    return(1);
  }

  SDL_RWseek(rw,0,RW_SEEK_END);
  fprintf(stderr,"Final position in test.bin: %d\n",SDL_RWtell(rw));
  SDL_RWclose(rw);
  return(0);
}

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Remarks

*
This is not a built-in function. This is a macro that calls whatever seek function that happens to be pointed to in an SDL_RWops structure.
*

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Related Functions

• SDL_RWclose (Macro) *

• SDL_RWFromFile *

• SDL_RWread (Macro) *

• SDL_RWseek(Macro) *

• SDL_RWwrite (Macro) *

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CategoryAPI, CategoryIO