[SDL] Transfer binary files using SDLNet_TCP_Send()

[Brian]

Bear in mind this is not tested:

int len;
char* buffer;
FILE* file = fopen("file.dat", "rb");
if( !file )
{
    // do something
}

fseek(file,0,SEEK_END);
len = ftell(file);
rewind(file);

// you would only need sizeof(char) here too, on a 32bit platform
// char*s are be 4 ties the size of chars
// but why use calloc, we will be overwriting it all ourselves anyway
// I *think* that cast is unnecessary in C, but im not sure
// sizeof(char) is defined as being 1 in c++
// but Im not so sure about c, so Ill leave it in
buffer = (char*)malloc(len*sizeof(char));
if(!buffer)
{
   // do something
  // and fclose(file)
}

// alternatively you could read it in manageable chunks
// this really depends on the file you are sending, if its never
// going to be big this should suffice
fread(buffer,len,1,file);

fclose(file);

// strlen(buffer)? That's dangerous
// if the binary file contained a byte that equaled '\0' you wouldn't
// send the whole file, only up to that point
SDLNet_TCP_Send(sock,buffer,len);

free(buffer);

On 3/23/07, Eduardo Fernandes <ceduardodfernandes at gmail.com> wrote:
> Thanks,
>
> I´ve already did it, and I was sucessfull, I done it this way:
>
> int i;
> int len;
> char c;
> char* buffer;
> FILE* file = fopen("file.dat", "rb");
>
> fseek(file,0,SEEK_END);
> len = ftell(file);
> rewind(file);
>
> buffer = (char*)calloc(len,sizeof(char*));
>
> for(i=0; i<len; i++)
> {
>    fread(&c,sizeof(char),1,file);
>    memcpy((buffer + i),&c,sizeof(char);
> }
>
> fclose(file);
>
> SDLNet_TCP_Send(sock,buffer,(int)strlen(buffer));
>
> free(buffer);
>
> What do you think about it?
>
> If somebody knows a better way, please send us.
>
> Thanks again.
>
> Eduardo Fernandes.
>
>
> 2007/3/23, Olivier Delannoy <olivier.delannoy at gmail.com>:
> > You load the file by chunk in a  memory buffer and send loaded chunk using
> SDLNet_TCP_Send(). Send work like write on file. Basically it's exactly the
> same as copying a file.
> >
> >
> >
> > On 3/23/07, Eduardo Fernandes <ceduardodfernandes at gmail.com> wrote:
> > >
> > > Hi,
> > >
> > > I would like to know how you to transfer binary files using
> SDLNet_TCP_Send().
> > >
> > > I´m a C programmer working at a software house developing a game in SDL.
> > >
> > > thanks
> > >
> > > Eduardo Fernandes
> > >
> > > _______________________________________________
> > > SDL mailing list
> > > SDL at lists.libsdl.org
> > > http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
> > >
> > >
> >
> >
> >
> > --
> > Olivier Delannoy
> > ATER
> > PRiSM Laboratory
> > Versailles University, FRANCE
> > _______________________________________________
> > SDL mailing list
> > SDL at lists.libsdl.org
> > http://lists.libsdl.org/listinfo.cgi/sdl-libsdl.org
> >
> >
>
>
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