DRAFT |
SDL_RWtell
Use this function to perform a do-nothing seek to get the current offset in an SDL_RWops data stream.
Syntax
long SDL_RWtell(struct SDL_RWops* context)
Function Parameters
context |
a data stream containing the tell function ??? |
Return Value
*Returns the current offset in the stream.*
Code Examples
*
#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);
}
*
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.
*
Related Functions
SDL_RWclose (Macro) *
SDL_RWread (Macro) *
SDL_RWseek(Macro) *
SDL_RWwrite (Macro) *
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 use 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.