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Re: skipping bytes

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In article <1abeef95-22ff-499a-b3c2-ab1a24e21c44@h25g2000prf.googlegroups.com>,
Chad  <cdalten@gmail.com> wrote:
> On Jul 19, 10:27 am, blm...@myrealbox.com <blmblm.myreal...@gmail.com>
> wrote:
> > In article <4e24a90b$0$8602$bbae4...@news.suddenlink.net>,
> >
> >
> >
> >
> >
> > Bill Cunningham <nos...@nspam.invalid> wrote:
> > > John Gordon wrote:
> > > > In <4e24a281$0$1929$bbae4...@news.suddenlink.net> "Bill Cunningham"
> > > > <nos...@nspam.invalid> writes:
> >
> > > >>     I want to take a 700MB file and skip evey 200MB, so I thought of
> > > >> this.
> >
> > > > You mean you want to copy the 700MB file to another file, omitting
> > > > 200MB chunks?
> >
> > > >> long * space=malloc(sizeof(long)*500000);
> >
> > > > There's no need to allocate that much space for a simple copy
> > > > operation.
> > > > You can copy, say, 8K or 16K at a time without allocating a huge
> > > > buffer.
> >
> > >     I actually wanted to do something a little more difficult than just copy
> > > the file. Every 200MB I want to save in a buffer about 8 bytes of data and
> > > exchange 0x0000 for it. It doesn't have to be every 200M but it's such a
> > > large file I thought of 200MB. Not using malloc() makes things so much
> > > easier. It doesn't have to be exactly 8 bytes it could be 32. The important
> > > thing is to correctly store the data read and save it correctly so it could
> > > be put back.
> >
> > Do you have some end goal in mind, or are you doing this because it
> > somehow strikes you as an interesting or entertaining problem in its
> > own right?  I can't make much sense of the above description and am
> > (mildly) curious.
> >
> > [ snip ]
> >
> 
> You obviously haven't hung around this joint long enough.
> 

Au contraire -- but in the past it has been a lot clearer what
Bill wanted to accomplish, even when the posted code didn't seem
very promising as a way to accomplish the stated goal.

-- 
B. L. Massingill
ObDisclaimer:  I don't speak for my employers; they return the favor.

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Thread

skipping bytes "Bill Cunningham" <nospam@nspam.invalid> - 2011-07-19 05:15 -0400
  Re: skipping bytes John Gordon <gordon@panix.com> - 2011-07-18 21:35 +0000
    Re: skipping bytes "Bill Cunningham" <nospam@nspam.invalid> - 2011-07-19 05:43 -0400
      Re: skipping bytes blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 17:27 +0000
        Re: skipping bytes Chad <cdalten@gmail.com> - 2011-07-19 12:09 -0700
          Re: skipping bytes blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 21:34 +0000
        Re: skipping bytes "Bill Cunningham" <nospam@nspam.invalid> - 2011-07-20 03:17 -0400
          Re: skipping bytes blmblm@myrealbox.com <blmblm.myrealbox@gmail.com> - 2011-07-19 21:35 +0000
            Re: skipping bytes "Bill Cunningham" <nospam@nspam.invalid> - 2011-07-20 07:01 -0400
            Re: skipping bytes "Bill Cunningham" <nospam@nspam.invalid> - 2011-07-22 11:25 -0400
  Re: skipping bytes Ian Collins <ian-news@hotmail.com> - 2011-07-19 09:42 +1200

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