RWops seek on big files

SDL Development
1

Is it possible to seek past the 2GB mark in an RWops? The offset of the
seek callback is an int.

Or is it hopeless?

2

Can’t you just do multiple seeks? Or do RWops fail on files larger than 2GB?

2013/5/31, Nikos Chantziaras :> Is it possible to seek past the 2GB mark in an RWops? The offset of the

seek callback is an int.

Or is it hopeless?

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

3

The return value is then messed up, as it’s also an int, meaning you
can’t tell where the position currently is.

Maybe it’s time for an SDL_RWops64 :-POn 01/06/13 02:13, Sik the hedgehog wrote:

Can’t you just do multiple seeks? Or do RWops fail on files larger than 2GB?

2013/5/31, Nikos Chantziaras <@Nikos_Chantziaras>:

Is it possible to seek past the 2GB mark in an RWops? The offset of the
seek callback is an int.

Or is it hopeless?

4

Or SDL 2.0 :slight_smile:

Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
int whence);On Fri, May 31, 2013 at 5:34 PM, Nikos Chantziaras wrote:

The return value is then messed up, as it’s also an int, meaning you can’t
tell where the position currently is.

Maybe it’s time for an SDL_RWops64 :stuck_out_tongue:

On 01/06/13 02:13, Sik the hedgehog wrote:

Can’t you just do multiple seeks? Or do RWops fail on files larger than
2GB?

2013/5/31, Nikos Chantziaras :

Is it possible to seek past the 2GB mark in an RWops? The offset of the
seek callback is an int.

Or is it hopeless?

_____________**
SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/**listinfo.cgi/sdl-libsdl.orghttp://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

5

That’s what I get for never using SDL_RWops… (I use PhysicsFS)

6

As long as we’re modernizing things in SDL 2.0, why are we sticking with a ridiculous name like RWops?
Why not just call it what is is: SDL_Stream?? :stuck_out_tongue:

Mason________________________________
From: Sam Lantinga
To: SDL Development List
Sent: Friday, May 31, 2013 7:40 PM
Subject: Re: [SDL] RWops seek on big files

Or SDL 2.0 :slight_smile:

Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?int whence);

On Fri, May 31, 2013 at 5:34 PM, Nikos Chantziaras wrote:

The return value is then messed up, as it’s also an int, meaning you can’t tell where the position currently is.

Maybe it’s time for an SDL_RWops64 :stuck_out_tongue:

On 01/06/13 02:13, Sik the hedgehog wrote:

Can’t you just do multiple seeks? Or do RWops fail on files larger than 2GB?

2013/5/31, Nikos Chantziaras :

Is it possible to seek past the 2GB mark in an RWops? ?The offset of the

seek callback is an int.

Or is it hopeless?

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

7

ABI is already fixed so forget that. At least it isn’t SDL_File (which
can actually become misleading in some cases as it doesn’t have to be
a file).

2013/5/31, Mason Wheeler :> As long as we’re modernizing things in SDL 2.0, why are we sticking with a

ridiculous name like RWops?
Why not just call it what is is: SDL_Stream?? :stuck_out_tongue:

Mason

From: Sam Lantinga
To: SDL Development List
Sent: Friday, May 31, 2013 7:40 PM
Subject: Re: [SDL] RWops seek on big files

Or SDL 2.0 :slight_smile:

Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
? ? ? ? ? ? ? ? ? ? ? ? ? ? ?int whence);

On Fri, May 31, 2013 at 5:34 PM, Nikos Chantziaras wrote:

The return value is then messed up, as it’s also an int, meaning you can’t
tell where the position currently is.

Maybe it’s time for an SDL_RWops64 :stuck_out_tongue:

On 01/06/13 02:13, Sik the hedgehog wrote:

Can’t you just do multiple seeks? Or do RWops fail on files larger than
2GB?

2013/5/31, Nikos Chantziaras :

Is it possible to seek past the 2GB mark in an RWops? ?The offset of the

seek callback is an int.

Or is it hopeless?

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

SDL mailing list
SDL at lists.libsdl.org
http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org

8

Now that was stupid of me. I didn’t even check whether SDL 2.0
changed the callback signatures ;-POn 01/06/13 05:40, Sam Lantinga wrote:

Or SDL 2.0 :slight_smile:

Sint64 (SDLCALL * seek) (struct SDL_RWops * context, Sint64 offset,
int whence);

On Fri, May 31, 2013 at 5:34 PM, Nikos Chantziaras <@Nikos_Chantziaras mailto:Nikos_Chantziaras> wrote:

The return value is then messed up, as it's also an int, meaning you
can't tell where the position currently is.

Maybe it's time for an SDL_RWops64 :-P



On 01/06/13 02:13, Sik the hedgehog wrote:

    Can't you just do multiple seeks? Or do RWops fail on files
    larger than 2GB?

    2013/5/31, Nikos Chantziaras <@Nikos_Chantziaras
    <mailto:@Nikos_Chantziaras>>:

        Is it possible to seek past the 2GB mark in an RWops?  The
        offset of the
        seek callback is an int.

        Or is it hopeless?